Exit and Restructuring Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Exit and restructuring costs	$ 10	$ 11	$ 16
Estimated remaining costs	9
2019 Productivity Plan
Restructuring Cost and Reserve [Line Items]
Exit and restructuring costs	8
Estimated remaining costs	10
2017 Productivity Plan
Restructuring Cost and Reserve [Line Items]
Exit and restructuring costs	2	$ 11	12
Exit and restructuring charges incurred	25
Acquisition Plan
Restructuring Cost and Reserve [Line Items]
Exit and restructuring costs			$ 4
Exit and restructuring charges incurred	$ 69