XML 130 R122.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Consolidated statement of cash flows - additional details - Depreciation, amortization, impairments and fair value adjustments (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Disclosure of detailed information about property, plant and equipment [line items]      
Depreciation, amortization, impairments and fair value adjustments $ 1,456 $ 1,622 $ 1,334
Property, plant and equipment [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Depreciation, amortization, impairments and fair value adjustments 275 241 215
Right-of-use assets [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Depreciation, amortization, impairments and fair value adjustments 66 0 0
Intangible assets [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Depreciation, amortization, impairments and fair value adjustments 1,084 1,397 1,090
Financial asset [member]      
Disclosure of detailed information about property, plant and equipment [line items]      
Depreciation, amortization, impairments and fair value adjustments $ 31 $ (16) $ 29