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Condensed Consolidating Financial Statements - Condensed Consolidating Statements of Comprehensive Income (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Condensed Income Statements, Captions [Line Items]        
Comprehensive income $ 394 $ 295 $ 705 $ 620
Less: Comprehensive loss attributable to noncontrolling interests (1) (1) (2) (3)
Comprehensive income attributable to Waste Management, Inc. 395 296 707 623
Eliminations [Member]        
Condensed Income Statements, Captions [Line Items]        
Comprehensive income (815) (669) (1,504) (1,280)
Comprehensive income attributable to Waste Management, Inc. (815) (669) (1,504) (1,280)
WM [Member] | Reportable Legal Entities [Member]        
Condensed Income Statements, Captions [Line Items]        
Comprehensive income 364 289 664 549
Comprehensive income attributable to Waste Management, Inc. 364 289 664 549
WM Holdings [Member] | Reportable Legal Entities [Member]        
Condensed Income Statements, Captions [Line Items]        
Comprehensive income 406 333 749 637
Comprehensive income attributable to Waste Management, Inc. 406 333 749 637
Non-Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member]        
Condensed Income Statements, Captions [Line Items]        
Comprehensive income 439 342 796 714
Less: Comprehensive loss attributable to noncontrolling interests (1) (1) (2) (3)
Comprehensive income attributable to Waste Management, Inc. $ 440 $ 343 $ 798 $ 717