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Condensed Consolidating Financial Statements - Condensed Consolidating Statements of Operations (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] |  |  |  |
Operating revenues | $ 3,677 | $ 3,425 | $ 7,117 | $ 6,601
Costs and expenses | 3,004 | 2,814 | 5,886 | 5,482
Income from operations | 673 | 611 | 1,231 | 1,119
Other income (expense): |  |  |  |
Interest expense, net | (90) | (93) | (182) | (188)
Other, net | (13) | (59) | (45) | (76)
Total other income (expense) | (103) | (152) | (227) | (264)
Income before income taxes | 570 | 459 | 1,004 | 855
Income tax expense (benefit) | 209 | 173 | 346 | 313
Consolidated net income | 361 | 286 | 658 | 542
Less: Net loss attributable to noncontrolling interests | (1) | (1) | (2) | (3)
Net income attributable to Waste Management, Inc. | 362 | 287 | 660 | 545
Eliminations [Member] |  |  |  |
Other income (expense): |  |  |  |
Equity in earnings of subsidiaries, net of tax expense | (815) | (669) | (1,504) | (1,280)
Total other income (expense) | (815) | (669) | (1,504) | (1,280)
Income before income taxes | (815) | (669) | (1,504) | (1,280)
Consolidated net income | (815) | (669) | (1,504) | (1,280)
Net income attributable to Waste Management, Inc. | (815) | (669) | (1,504) | (1,280)
WM [Member] | Reportable Legal Entities [Member] |  |  |  |
Other income (expense): |  |  |  |
Interest expense, net | (74) | (76) | (148) | (150)
Equity in earnings of subsidiaries, net of tax expense | 406 | 333 | 749 | 637
Other, net |  |  |  | (1)
Total other income (expense) | 332 | 257 | 601 | 486
Income before income taxes | 332 | 257 | 601 | 486
Income tax expense (benefit) | (30) | (30) | (59) | (59)
Consolidated net income | 362 | 287 | 660 | 545
Net income attributable to Waste Management, Inc. | 362 | 287 | 660 | 545
WM Holdings [Member] | Reportable Legal Entities [Member] |  |  |  |
Other income (expense): |  |  |  |
Interest expense, net | (5) | (5) | (10) | (10)
Equity in earnings of subsidiaries, net of tax expense | 409 | 336 | 755 | 643
Total other income (expense) | 404 | 331 | 745 | 633
Income before income taxes | 404 | 331 | 745 | 633
Income tax expense (benefit) | (2) | (2) | (4) | (4)
Consolidated net income | 406 | 333 | 749 | 637
Net income attributable to Waste Management, Inc. | 406 | 333 | 749 | 637
Non-Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member] |  |  |  |
Condensed Income Statements, Captions [Line Items] |  |  |  |
Operating revenues | 3,677 | 3,425 | 7,117 | 6,601
Costs and expenses | 3,004 | 2,814 | 5,886 | 5,482
Income from operations | 673 | 611 | 1,231 | 1,119
Other income (expense): |  |  |  |
Interest expense, net | (11) | (12) | (24) | (28)
Other, net | (13) | (59) | (45) | (75)
Total other income (expense) | (24) | (71) | (69) | (103)
Income before income taxes | 649 | 540 | 1,162 | 1,016
Income tax expense (benefit) | 241 | 205 | 409 | 376
Consolidated net income | 408 | 335 | 753 | 640
Less: Net loss attributable to noncontrolling interests | (1) | (1) | (2) | (3)
Net income attributable to Waste Management, Inc. | $ 409 | $ 336 | $ 755 | $ 643

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