Restructuring Charges (Accrual Rollfoward) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Restructuring Reserve [Roll Forward]
Restructuring accruals	$ 13	$ 9
Restructuring charges	15	5
Cash payments	(9)	(4)
Restructuring accruals	19	10
Water Infrastructure
Restructuring Reserve [Roll Forward]
Restructuring charges	10	5
Restructuring accruals	14	7
Applied Water
Restructuring Reserve [Roll Forward]
Restructuring charges	5	0
Restructuring accruals	5	3
Corporate and other
Restructuring Reserve [Roll Forward]
Restructuring charges	0	0
Restructuring accruals	$ 0	$ 0