Segment and Geographic Data (Assets by Segment (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Total assets for each reportable segment
Total assets	$ 7,710	$ 7,222	$ 6,860
Water Infrastructure
Total assets for each reportable segment
Total assets	1,268	1,233	1,232
Applied Water
Total assets for each reportable segment
Total assets	1,016	1,051	1,002
Measurement & Control Solutions
Total assets for each reportable segment
Total assets	3,497	3,576	3,198
Regional Selling Locations
Total assets for each reportable segment
Total assets	1,375	1,181	1,119
Corporate and other
Total assets for each reportable segment
Total assets	$ 554	$ 181	$ 309