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Condensed Consolidating Financial Statements - Condensed Consolidating Statements of Operations (Detail) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Condensed Income Statements, Captions [Line Items]    
Operating revenues $ 3,440 $ 3,176
Costs and expenses 2,882 2,668
Income from operations 558 508
Other income (expense):    
Interest expense, net (92) (95)
Other, net (32) (17)
Total other income (expense) (124) (112)
Income before income taxes 434 396
Income tax expense (benefit) 137 140
Consolidated net income 297 256
Less: Net loss attributable to noncontrolling interests (1) (2)
Net income attributable to Waste Management, Inc. 298 258
Eliminations [Member]    
Other income (expense):    
Equity in earnings of subsidiaries, net of tax expense (689) (611)
Total other income (expense) (689) (611)
Income before income taxes (689) (611)
Consolidated net income (689) (611)
Net income attributable to Waste Management, Inc. (689) (611)
WM [Member]    
Other income (expense):    
Interest expense, net (74) (74)
Equity in earnings of subsidiaries, net of tax expense 343 304
Other, net   (1)
Total other income (expense) 269 229
Income before income taxes 269 229
Income tax expense (benefit) (29) (29)
Consolidated net income 298 258
Net income attributable to Waste Management, Inc. 298 258
WM Holdings [Member]    
Other income (expense):    
Interest expense, net (5) (5)
Equity in earnings of subsidiaries, net of tax expense 346 307
Total other income (expense) 341 302
Income before income taxes 341 302
Income tax expense (benefit) (2) (2)
Consolidated net income 343 304
Net income attributable to Waste Management, Inc. 343 304
Non-Guarantor Subsidiaries [Member]    
Condensed Income Statements, Captions [Line Items]    
Operating revenues 3,440 3,176
Costs and expenses 2,882 2,668
Income from operations 558 508
Other income (expense):    
Interest expense, net (13) (16)
Other, net (32) (16)
Total other income (expense) (45) (32)
Income before income taxes 513 476
Income tax expense (benefit) 168 171
Consolidated net income 345 305
Less: Net loss attributable to noncontrolling interests (1) (2)
Net income attributable to Waste Management, Inc. $ 346 $ 307