Restructuring Plan - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Restructuring Cost and Reserve [Line Items]
Restructuring charge	$ 2	$ 24	$ 4	$ 24
Severance and other employee related charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other asset-related charges	0	(5)	(1)	(5)
Severance and other employee related charges [Member] | Employee-related costs in accordance with ASC 420
Restructuring Cost and Reserve [Line Items]
Restructuring and other asset-related charges	0			(2)
Severance and other employee related charges [Member] | Severance charge under ASC 712 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other asset-related charges			0	(3)
Asset Related Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other asset-related charges	(6)		(6)
Other exit costs
Restructuring Cost and Reserve [Line Items]
Restructuring and other asset-related charges	(1)	(2)	(2)	(2)
Cost of Products [Member] | inventory related charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other asset-related charges	$ (7)	$ (17)	$ (7)	$ (17)