Basis of Presentation (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) segment	Sep. 30, 2020 USD ($)
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Increase of other income (expense)	$ 10	$ 0	$ 7	$ 19
Effective income tax rate	(2.60%)	22.50%	51.40%	19.30%
Restructuring reserves				$ 112
Number of operating segment | segment			1
Reclassification adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Decrease of net loss from discontinued operations		$ 1		1
Increase of other income (expense)		$ 1		$ 1
Previously Reported
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Effective income tax rate		22.60%		19.40%