Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Consolidated net income	$ 273	$ 222	$ 142	$ 459
Derivative instruments, net	2	4	5	(2)
Available-for-sale securities, net	1	2	1	2
Foreign currency translation adjustments	13	40	(63)	(19)
Other comprehensive income (loss), net of taxes	16	46	(57)	(19)
Comprehensive income	289	268	85	440
Less: Comprehensive income (loss) attributable to noncontrolling interests	(1)	12	(3)	21
Comprehensive income attributable to Waste Management, Inc.	$ 290	$ 256	$ 88	$ 419