| 
                Total assets
             | 
                        
                32.0B
             | 
                        
                30.6B
             | 
                        
                30.2B
             | 
                        
                28.8B
             | 
                    
                
                        | 
                Current assets
             | 
                        
                17.4B
             | 
                        
                16.5B
             | 
                        
                16.3B
             | 
                        
                15.4B
             | 
                    
                
                        | 
                Cash
             | 
                        
                421.1M
             | 
                        
                —
             | 
                        
                520.6M
             | 
                        
                —
             | 
                    
                
                        | 
                Cash equivalents
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Cash and cash equivalents
             | 
                        
                421.1M
             | 
                        
                378.6M
             | 
                        
                520.6M
             | 
                        
                349.9M
             | 
                    
                
                        | 
                Other short term investments
             | 
                        
                5.6B
             | 
                        
                7.9B
             | 
                        
                6.1B
             | 
                        
                7.7B
             | 
                    
                
                        | 
                Accounts receivable
             | 
                        
                4.8B
             | 
                        
                5.5B
             | 
                        
                4.3B
             | 
                        
                4.5B
             | 
                    
                
                        | 
                Other receivables
             | 
                        
                3.8B
             | 
                        
                49.4M
             | 
                        
                2.4B
             | 
                        
                126.8M
             | 
                    
                
                        | 
                Inventory
             | 
                        
                1.9B
             | 
                        
                1.9B
             | 
                        
                1.9B
             | 
                        
                1.7B
             | 
                    
                
                        | 
                Prepaid assets
             | 
                        
                492.9M
             | 
                        
                —
             | 
                        
                786.2M
             | 
                        
                —
             | 
                    
                
                        | 
                Restricted cash
             | 
                        
                131.1M
             | 
                        
                —
             | 
                        
                124.3M
             | 
                        
                —
             | 
                    
                
                        | 
                Assets held for sale
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Hedging assets
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Other current assets
             | 
                        
                180.8M
             | 
                        
                798.9M
             | 
                        
                240.6M
             | 
                        
                914.3M
             | 
                    
                
                        | 
                Non current assets
             | 
                        
                14.6B
             | 
                        
                14.1B
             | 
                        
                13.9B
             | 
                        
                13.4B
             | 
                    
                
                        | 
                Properties
             | 
                        
                1.1B
             | 
                        
                7.3B
             | 
                        
                1.0B
             | 
                        
                7.4B
             | 
                    
                
                        | 
                Land and improvements
             | 
                        
                706.7M
             | 
                        
                —
             | 
                        
                708.2M
             | 
                        
                —
             | 
                    
                
                        | 
                Machinery furniture equipment
             | 
                        
                3.0B
             | 
                        
                —
             | 
                        
                2.8B
             | 
                        
                —
             | 
                    
                
                        | 
                Construction in progress
             | 
                        
                697.8M
             | 
                        
                639.9M
             | 
                        
                541.3M
             | 
                        
                425.5M
             | 
                    
                
                        | 
                Leases
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Accumulated depreciation
             | 
                        
                -3.1B
             | 
                        
                —
             | 
                        
                -2.6B
             | 
                        
                —
             | 
                    
                
                        | 
                Goodwill
             | 
                        
                35.7M
             | 
                        
                14.2M
             | 
                        
                17.3M
             | 
                        
                18.1M
             | 
                    
                
                        | 
                Investment properties
             | 
                        
                9.2M
             | 
                        
                9.6M
             | 
                        
                9.7M
             | 
                        
                9.9M
             | 
                    
                
                        | 
                Financial assets
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Intangible assets
             | 
                        
                35.7M
             | 
                        
                14.2M
             | 
                        
                17.3M
             | 
                        
                18.1M
             | 
                    
                
                        | 
                Investments and advances
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Other non current assets
             | 
                        
                6.2M
             | 
                        
                202.9M
             | 
                        
                2.4M
             | 
                        
                127.2M
             | 
                    
                
                        | 
                Total liabilities
             | 
                        
                10.5B
             | 
                        
                11.0B
             | 
                        
                10.3B
             | 
                        
                10.5B
             | 
                    
                
                        | 
                Current liabilities
             | 
                        
                7.0B
             | 
                        
                7.8B
             | 
                        
                7.1B
             | 
                        
                7.5B
             | 
                    
                
                        | 
                Accounts payable
             | 
                        
                3.0B
             | 
                        
                3.1B
             | 
                        
                3.1B
             | 
                        
                3.0B
             | 
                    
                
                        | 
                Accrued expenses
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Short term debt
             | 
                        
                86.3M
             | 
                        
                438.2M
             | 
                        
                254.1M
             | 
                        
                340.6M
             | 
                    
                
                        | 
                Deferred revenue
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Tax payable
             | 
                        
                457.7M
             | 
                        
                446.4M
             | 
                        
                523.7M
             | 
                        
                386.4M
             | 
                    
                
                        | 
                Pensions
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Other current liabilities
             | 
                        
                548.9M
             | 
                        
                1.3B
             | 
                        
                591.1M
             | 
                        
                1.3B
             | 
                    
                
                        | 
                Non current liabilities
             | 
                        
                3.5B
             | 
                        
                3.2B
             | 
                        
                3.1B
             | 
                        
                3.0B
             | 
                    
                
                        | 
                Long term provisions
             | 
                        
                1.1B
             | 
                        
                918.2M
             | 
                        
                891.9M
             | 
                        
                653.7M
             | 
                    
                
                        | 
                Long term debt
             | 
                        
                970.1M
             | 
                        
                799.0M
             | 
                        
                876.8M
             | 
                        
                927.8M
             | 
                    
                
                        | 
                Provision for risks and charges
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Deferred liabilities
             | 
                        
                1.4B
             | 
                        
                1.4B
             | 
                        
                1.3B
             | 
                        
                1.4B
             | 
                    
                
                        | 
                Derivative product liabilities
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Other non current liabilities
             | 
                        
                43.8M
             | 
                        
                75.6M
             | 
                        
                43.9M
             | 
                        
                79.9M
             | 
                    
                
                        | 
                Shareholders equity
             | 
                        
                
             | 
                        
                
             | 
                        
                
             | 
                        
                
             | 
                    
                
                        | 
                Common stock
             | 
                        
                222.0M
             | 
                        
                222.0M
             | 
                        
                222.0M
             | 
                        
                222.0M
             | 
                    
                
                        | 
                Retained earnings
             | 
                        
                10.0B
             | 
                        
                —
             | 
                        
                8.5B
             | 
                        
                —
             | 
                    
                
                        | 
                Other shareholders equity
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Total shareholders equity
             | 
                        
                21.5B
             | 
                        
                19.6B
             | 
                        
                19.9B
             | 
                        
                18.3B
             | 
                    
                
                        | 
                Additional paid in capital
             | 
                        
                224.1M
             | 
                        
                —
             | 
                        
                224.1M
             | 
                        
                —
             | 
                    
                
                        | 
                Treasury stock
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Minority interest
             | 
                        
                7.7B
             | 
                        
                7.1B
             | 
                        
                7.7B
             | 
                        
                6.6B
             |