Goodwill and Other Intangible Assets (Details) $ in Millions	6 Months Ended
	Jun. 30, 2015 USD ($)
Changes in the carrying value of goodwill by operating segment
Balance as of January 1, 2015	$ 1,635
Foreign currency and other	(43)
Balance as of June 30, 2015	1,592
Water Infrastructure
Changes in the carrying value of goodwill by operating segment
Balance as of January 1, 2015	1,098
Foreign currency and other	(29)
Balance as of June 30, 2015	1,069
Applied Water
Changes in the carrying value of goodwill by operating segment
Balance as of January 1, 2015	537
Foreign currency and other	(14)
Balance as of June 30, 2015	$ 523