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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

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