Restructuring Charges (Restructuring Charges) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Restructuring Cost and Impairment Charge
Severance and other charges	$ 2	$ 7
Lease related charges	0	1
Restructuring charges	2	8
Asset impairment	0	3
Total restructuring and asset impairment charges	2	11
Water Infrastructure
Restructuring Cost and Impairment Charge
Restructuring charges	2	4
Applied Water
Restructuring Cost and Impairment Charge
Restructuring charges	0	0
Measurement & Control Solutions
Restructuring Cost and Impairment Charge
Restructuring charges	$ 0	7
Asset impairment		$ 3

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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