Restructuring and Asset Impairment Charges - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Asset impairment charges		$ 10	$ 2	$ 5
Water Infrastructure
Restructuring Cost and Reserve [Line Items]
Asset impairment charges	$ 2
Measurement & Control Solutions
Restructuring Cost and Reserve [Line Items]
Asset impairment charges		10
2016 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Expected restructuring costs		16
Incurred restructuring costs		1	15
2015 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Expected restructuring costs		23
Incurred restructuring costs		$ 2	$ 4	$ 11