Reclassifications From Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Reclassifications from accumulated other comprehensive (loss) income
Other income (expense), net	$ 51	$ 44
Tax (benefit)	33	35
Reclassifications, after tax	(538)	(127)
Reclassification out of Accumulated Other Comprehensive Income | Actuarial losses, net
Reclassifications from accumulated other comprehensive (loss) income
Other income (expense), net	7	5
Tax (benefit)	(2)	(1)
Reclassifications, after tax	$ 5	$ 4