Company Restructuring - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring and related charges	$ 14	$ 9	$ 19	$ 27
Employee costs
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date for active programs	119		119
Exit costs
Restructuring Cost and Reserve [Line Items]
Cumulative amount incurred to date for active programs	$ 10		$ 10