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Quarterly Financial Data (Unaudited) - Schedule of Unaudited Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Operating revenues	$ 3,460	$ 3,548	$ 3,425	$ 3,176	$ 3,246	$ 3,360	$ 3,315	$ 3,040	$ 13,609	$ 12,961	$ 13,996
Income from operations	617	560	611	508	502	601	502	440	2,296	2,045	2,299
Consolidated net income	334	304	286	256	273	337	273	(131)	1,180	752	1,338
Net income (loss) attributable to Waste Management, Inc.	$ 335	$ 302	$ 287	$ 258	$ 273	$ 335	$ 274	$ (129)	$ 1,182	$ 753	$ 1,298
Basic earnings (loss) per common share	$ 0.76	$ 0.68	$ 0.65	$ 0.58	$ 0.61	$ 0.75	$ 0.60	$ (0.28)	$ 2.66	$ 1.66	$ 2.80
Diluted earnings (loss) per common share	$ 0.75	$ 0.68	$ 0.64	$ 0.58	$ 0.61	$ 0.74	$ 0.60	$ (0.28)	$ 2.65	$ 1.65	$ 2.79

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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