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Condensed Consolidating Financial Statements - Condensed Consolidating Balance Sheets (Detail) - USD ($) $ in Millions | Jun. 30, 2017 | Dec. 31, 2016 | Jun. 30, 2016 | Dec. 31, 2015
--- | --- | --- | --- | ---
Current assets: |  |  |  |
Cash and cash equivalents | $ 32 | $ 32 | $ 39 | $ 39
Other current assets | 2,294 | 2,344 |  |
Total current assets | 2,326 | 2,376 |  |
Property and equipment, net | 11,002 | 10,950 |  |
Other assets | 7,511 | 7,533 |  |
Total assets | 20,839 | 20,859 |  |
Current liabilities: |  |  |  |
Current portion of long-term debt | 390 | 417 |  |
Accounts payable and other current liabilities | 2,380 | 2,377 |  |
Total current liabilities | 2,770 | 2,794 |  |
Long-term debt, less current portion | 8,667 | 8,893 |  |
Other liabilities | 3,895 | 3,852 |  |
Total liabilities | 15,332 | 15,539 |  |
Equity: |  |  |  |
Stockholders' equity | 5,486 | 5,297 |  |
Noncontrolling interests | 21 | 23 |  |
Total equity | 5,507 | 5,320 |  |
Total liabilities and equity | 20,839 | 20,859 |  |
Eliminations [Member] |  |  |  |
Current assets: |  |  |  |
Investments in affiliates | (41,800) | (40,255) |  |
Advances to affiliates | (13,791) | (13,000) |  |
Total assets | (55,591) | (53,255) |  |
Current liabilities: |  |  |  |
Due to affiliates | (19,571) | (18,777) |  |
Total liabilities | (19,571) | (18,777) |  |
Equity: |  |  |  |
Stockholders' equity | (41,800) | (40,255) |  |
Advances to affiliates | 5,780 | 5,777 |  |
Total equity | (36,020) | (34,478) |  |
Total liabilities and equity | (55,591) | (53,255) |  |
WM [Member] | Reportable Legal Entities [Member] |  |  |  |
Current assets: |  |  |  |
Other current assets | 3 | 5 |  |
Total current assets | 3 | 5 |  |
Investments in affiliates | 20,673 | 19,924 |  |
Other assets | 13 | 14 |  |
Total assets | 20,689 | 19,943 |  |
Current liabilities: |  |  |  |
Current portion of long-term debt | 250 | 269 |  |
Accounts payable and other current liabilities | 77 | 81 |  |
Total current liabilities | 327 | 350 |  |
Long-term debt, less current portion | 6,075 | 6,229 |  |
Due to affiliates | 14,088 | 13,350 |  |
Other liabilities | 12 | 16 |  |
Total liabilities | 20,502 | 19,945 |  |
Equity: |  |  |  |
Stockholders' equity | 5,486 | 5,297 |  |
Advances to affiliates | (5,299) | (5,299) |  |
Total equity | 187 | (2) |  |
Total liabilities and equity | 20,689 | 19,943 |  |
WM Holdings [Member] | Reportable Legal Entities [Member] |  |  |  |
Current assets: |  |  |  |
Other current assets | 5 | 5 |  |
Total current assets | 5 | 5 |  |
Investments in affiliates | 21,127 | 20,331 |  |
Other assets | 37 | 30 |  |
Total assets | 21,169 | 20,366 |  |
Current liabilities: |  |  |  |
Accounts payable and other current liabilities | 9 | 9 |  |
Total current liabilities | 9 | 9 |  |
Long-term debt, less current portion | 304 | 304 |  |
Due to affiliates | 184 | 128 |  |
Total liabilities | 497 | 441 |  |
Equity: |  |  |  |
Stockholders' equity | 20,672 | 19,925 |  |
Total equity | 20,672 | 19,925 |  |
Total liabilities and equity | 21,169 | 20,366 |  |
Non-Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member] |  |  |  |
Current assets: |  |  |  |
Cash and cash equivalents | 32 | 32 | $ 39 | $ 39
Other current assets | 2,286 | 2,334 |  |
Total current assets | 2,318 | 2,366 |  |
Property and equipment, net | 11,002 | 10,950 |  |
Advances to affiliates | 13,791 | 13,000 |  |
Other assets | 7,461 | 7,489 |  |
Total assets | 34,572 | 33,805 |  |
Current liabilities: |  |  |  |
Current portion of long-term debt | 140 | 148 |  |
Accounts payable and other current liabilities | 2,294 | 2,287 |  |
Total current liabilities | 2,434 | 2,435 |  |
Long-term debt, less current portion | 2,288 | 2,360 |  |
Due to affiliates | 5,299 | 5,299 |  |
Other liabilities | 3,883 | 3,836 |  |
Total liabilities | 13,904 | 13,930 |  |
Equity: |  |  |  |
Stockholders' equity | 21,128 | 20,330 |  |
Advances to affiliates | (481) | (478) |  |
Noncontrolling interests | 21 | 23 |  |
Total equity | 20,668 | 19,875 |  |
Total liabilities and equity | $ 34,572 | $ 33,805 |  |

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