Supplementary Information Foreign Currency Exchange Gain (Loss) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Foreign Currency Exchange Gain (Loss) [Line Items]
Pre-tax exchange (loss) gain	[1]	$ (54)	$ (174)	$ (99)
Tax benefits (expenses) on exchange (loss) gain		(34)	13	15
Net after-tax exchange (loss) gain		(88)	(161)	(84)
Subsidiary Monetary Position
Foreign Currency Exchange Gain (Loss) [Line Items]
Pre-tax exchange (loss) gain		(72)	(263)	(41)
Tax benefits (expenses) on exchange (loss) gain		(30)	34	2
Net after-tax exchange (loss) gain		(102)	(229)	(39)
Hedging Program [Member]
Foreign Currency Exchange Gain (Loss) [Line Items]
Pre-tax exchange (loss) gain		18	89	(58)
Tax benefits (expenses) on exchange (loss) gain		(4)	(21)	13
Net after-tax exchange (loss) gain		14	68	(45)
Argentine peso devaluation [Member] | Hedging Program [Member]
Foreign Currency Exchange Gain (Loss) [Line Items]
Pre-tax exchange (loss) gain		$ (67)	$ (82)	$ (51)

[1] Includes net pre-tax exchange gains (losses) of $(67) million, $(82) million and $(51) million associated with the devaluation of the Argentine peso for the years ended December 31, 2021, 2020 and 2019, respectively.