XML 141 R129.htm IDEA: XBRL DOCUMENT v3.20.4
Other assets - Balance Sheet Presentation (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Other current assets $ 186 $ 158
Other non-current assets 46 59
Total other assets $ 232 $ 217