| 
                Total assets
             | 
                        
                53.0B
             | 
                        
                52.3B
             | 
                        
                52.9B
             | 
                        
                51.8B
             | 
                    
                
                        | 
                Current assets
             | 
                        
                9.2B
             | 
                        
                9.6B
             | 
                        
                10.8B
             | 
                        
                9.3B
             | 
                    
                
                        | 
                Cash
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Cash equivalents
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Cash and cash equivalents
             | 
                        
                2.0B
             | 
                        
                1.8B
             | 
                        
                3.0B
             | 
                        
                1.8B
             | 
                    
                
                        | 
                Other short term investments
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Accounts receivable
             | 
                        
                2.9B
             | 
                        
                3.2B
             | 
                        
                3.1B
             | 
                        
                1.2B
             | 
                    
                
                        | 
                Other receivables
             | 
                        
                571M
             | 
                        
                444M
             | 
                        
                602M
             | 
                        
                557M
             | 
                    
                
                        | 
                Inventory
             | 
                        
                1.6B
             | 
                        
                1.5B
             | 
                        
                1.6B
             | 
                        
                1.5B
             | 
                    
                
                        | 
                Prepaid assets
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Restricted cash
             | 
                        
                88M
             | 
                        
                96M
             | 
                        
                107M
             | 
                        
                89M
             | 
                    
                
                        | 
                Assets held for sale
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Hedging assets
             | 
                        
                726M
             | 
                        
                858M
             | 
                        
                843M
             | 
                        
                632M
             | 
                    
                
                        | 
                Other current assets
             | 
                        
                1.3B
             | 
                        
                1.7B
             | 
                        
                1.5B
             | 
                        
                3.5B
             | 
                    
                
                        | 
                Non current assets
             | 
                        
                43.8B
             | 
                        
                42.6B
             | 
                        
                42.2B
             | 
                        
                42.6B
             | 
                    
                
                        | 
                Properties
             | 
                        
                —
             | 
                        
                —
             | 
                        
                38.1B
             | 
                        
                —
             | 
                    
                
                        | 
                Land and improvements
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Machinery furniture equipment
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Construction in progress
             | 
                        
                —
             | 
                        
                —
             | 
                        
                1.3B
             | 
                        
                —
             | 
                    
                
                        | 
                Leases
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Accumulated depreciation
             | 
                        
                -18.5B
             | 
                        
                -18.4B
             | 
                        
                -18.1B
             | 
                        
                -18.0B
             | 
                    
                
                        | 
                Goodwill
             | 
                        
                840M
             | 
                        
                840M
             | 
                        
                840M
             | 
                        
                840M
             | 
                    
                
                        | 
                Investment properties
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Financial assets
             | 
                        
                527M
             | 
                        
                485M
             | 
                        
                372M
             | 
                        
                732M
             | 
                    
                
                        | 
                Intangible assets
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Investments and advances
             | 
                        
                398M
             | 
                        
                386M
             | 
                        
                640M
             | 
                        
                494M
             | 
                    
                
                        | 
                Other non current assets
             | 
                        
                20.6B
             | 
                        
                19.8B
             | 
                        
                19.5B
             | 
                        
                20.0B
             | 
                    
                
                        | 
                Total liabilities
             | 
                        
                39.2B
             | 
                        
                38.9B
             | 
                        
                39.4B
             | 
                        
                38.9B
             | 
                    
                
                        | 
                Current liabilities
             | 
                        
                6.3B
             | 
                        
                6.5B
             | 
                        
                6.8B
             | 
                        
                5.5B
             | 
                    
                
                        | 
                Accounts payable
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Accrued expenses
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Short term debt
             | 
                        
                1.0B
             | 
                        
                1.0B
             | 
                        
                1.0B
             | 
                        
                1.0B
             | 
                    
                
                        | 
                Deferred revenue
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Tax payable
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Pensions
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Other current liabilities
             | 
                        
                1.6B
             | 
                        
                1.9B
             | 
                        
                1.9B
             | 
                        
                1.7B
             | 
                    
                
                        | 
                Non current liabilities
             | 
                        
                33.0B
             | 
                        
                32.4B
             | 
                        
                32.5B
             | 
                        
                33.4B
             | 
                    
                
                        | 
                Long term provisions
             | 
                        
                12.7B
             | 
                        
                12.5B
             | 
                        
                12.4B
             | 
                        
                12.3B
             | 
                    
                
                        | 
                Long term debt
             | 
                        
                7.3B
             | 
                        
                7.3B
             | 
                        
                7.4B
             | 
                        
                7.4B
             | 
                    
                
                        | 
                Provision for risks and charges
             | 
                        
                4.9B
             | 
                        
                4.6B
             | 
                        
                4.5B
             | 
                        
                4.8B
             | 
                    
                
                        | 
                Deferred liabilities
             | 
                        
                3.3B
             | 
                        
                3.2B
             | 
                        
                3.3B
             | 
                        
                3.6B
             | 
                    
                
                        | 
                Derivative product liabilities
             | 
                        
                419M
             | 
                        
                358M
             | 
                        
                399M
             | 
                        
                341M
             | 
                    
                
                        | 
                Other non current liabilities
             | 
                        
                2.5B
             | 
                        
                2.6B
             | 
                        
                2.6B
             | 
                        
                3.4B
             | 
                    
                
                        | 
                Shareholders equity
             | 
                        
                
             | 
                        
                
             | 
                        
                
             | 
                        
                
             | 
                    
                
                        | 
                Common stock
             | 
                        
                10.9B
             | 
                        
                11.2B
             | 
                        
                11.4B
             | 
                        
                11.4B
             | 
                    
                
                        | 
                Retained earnings
             | 
                        
                4.8B
             | 
                        
                4.1B
             | 
                        
                4.1B
             | 
                        
                3.3B
             | 
                    
                
                        | 
                Other shareholders equity
             | 
                        
                -2.3B
             | 
                        
                -2.3B
             | 
                        
                -2.3B
             | 
                        
                -2.1B
             | 
                    
                
                        | 
                Total shareholders equity
             | 
                        
                13.8B
             | 
                        
                13.3B
             | 
                        
                13.5B
             | 
                        
                12.9B
             | 
                    
                
                        | 
                Additional paid in capital
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Treasury stock
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                        
                —
             | 
                    
                
                        | 
                Minority interest
             | 
                        
                357M
             | 
                        
                378M
             | 
                        
                373M
             | 
                        
                371M
             |