Basis of Presentation (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Increase of other income (expense)	$ (1)	$ (9)	$ (3)	$ 19
Effective income tax rate	34.10%	17.10%	24.80%	18.60%
Restructuring reserves				$ 82
Reclassification adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Decrease of net loss from discontinued operations		$ 1		0
Increase of other income (expense)		$ 1		$ 0
Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Effective income tax rate		17.20%		18.60%