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Condensed Consolidating Financial Statements - Condensed Consolidating Statements of Operations (Detail) - USD ($)
$ 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
Condensed Income Statements, Captions [Line Items]                      
Operating revenues $ 3,460 $ 3,548 $ 3,425 $ 3,176 $ 3,246 $ 3,360 $ 3,315 $ 3,040 $ 13,609 $ 12,961 $ 13,996
Costs and expenses                 11,313 10,916 11,697
Income from operations 617 560 611 508 502 601 502 440 2,296 2,045 2,299
Other income (expense):                      
Interest expense, net                 (376) (385) (466)
Loss on early extinguishment of debt                 (4) (555)  
Other, net                 (94) (45) (82)
Total other income (expense)                 (474) (985) (548)
Income before income taxes                 1,822 1,060 1,751
Provision for (benefit from) income taxes                 642 308 413
Consolidated net income 334 304 286 256 273 337 273 (131) 1,180 752 1,338
Less: Net income (loss) attributable to noncontrolling interests                 (2) (1) 40
Net income attributable to Waste Management, Inc. $ 335 $ 302 $ 287 $ 258 $ 273 $ 335 $ 274 $ (129) 1,182 753 1,298
Eliminations [Member]                      
Other income (expense):                      
Equity in earnings of subsidiaries, net of tax provision                 (2,748) (2,534) (2,580)
Total other income (expense)                 (2,748) (2,534) (2,580)
Income before income taxes                 (2,748) (2,534) (2,580)
Consolidated net income                 (2,748) (2,534) (2,580)
Net income attributable to Waste Management, Inc.                 (2,748) (2,534) (2,580)
WM [Member]                      
Other income (expense):                      
Interest expense, net                 (303) (298) (351)
Loss on early extinguishment of debt                 (1) (500)  
Equity in earnings of subsidiaries, net of tax provision                 1,367 1,245 1,510
Total other income (expense)                 1,063 447 1,159
Income before income taxes                 1,063 447 1,159
Provision for (benefit from) income taxes                 (119) (306) (139)
Consolidated net income                 1,182 753 1,298
Net income attributable to Waste Management, Inc.                 1,182 753 1,298
WM Holdings [Member]                      
Condensed Income Statements, Captions [Line Items]                      
Costs and expenses                   (1) (459)
Income from operations                   1 459
Other income (expense):                      
Interest expense, net                 (20) (22) (31)
Loss on early extinguishment of debt                   (52)  
Equity in earnings of subsidiaries, net of tax provision                 1,381 1,289 1,070
Total other income (expense)                 1,361 1,215 1,039
Income before income taxes                 1,361 1,216 1,498
Provision for (benefit from) income taxes                 (8) (29) (12)
Consolidated net income                 1,369 1,245 1,510
Net income attributable to Waste Management, Inc.                 1,369 1,245 1,510
Non-Guarantor Subsidiaries [Member]                      
Condensed Income Statements, Captions [Line Items]                      
Operating revenues                 13,609 12,961 13,996
Costs and expenses                 11,313 10,917 12,156
Income from operations                 2,296 2,044 1,840
Other income (expense):                      
Interest expense, net                 (53) (65) (84)
Loss on early extinguishment of debt                 (3) (3)  
Other, net                 (94) (45) (82)
Total other income (expense)                 (150) (113) (166)
Income before income taxes                 2,146 1,931 1,674
Provision for (benefit from) income taxes                 769 643 564
Consolidated net income                 1,377 1,288 1,110
Less: Net income (loss) attributable to noncontrolling interests                 (2) (1) 40
Net income attributable to Waste Management, Inc.                 $ 1,379 $ 1,289 $ 1,070