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Condensed Consolidating Financial Statements - Balance Sheets (Detail) - USD ($) $ in Millions | Mar. 31, 2018 | Dec. 31, 2017 | Mar. 31, 2017
--- | --- | --- | ---
Current assets: |  |  |
Cash and cash equivalents | $ 52 | $ 22 | $ 30
Other current assets | 2,439 | 2,602 |
Total current assets | 2,491 | 2,624 |
Property and equipment, net | 11,637 | 11,559 |
Other assets | 7,978 | 7,646 |
Total assets | 22,106 | 21,829 |
Current liabilities: |  |  |
Current portion of long-term debt | 1,056 | 739 |
Accounts payable and other current liabilities | 2,317 | 2,523 |
Total current liabilities | 3,373 | 3,262 |
Long-term debt, less current portion | 8,901 | 8,752 |
Other liabilities | 3,767 | 3,773 |
Total liabilities | 16,041 | 15,787 |
Equity: |  |  |
Stockholders' equity | 6,044 | 6,019 |
Noncontrolling interests | 21 | 23 |
Total equity | 6,065 | 6,042 |
Total liabilities and equity | 22,106 | 21,829 |
Eliminations [Member] |  |  |
Current assets: |  |  |
Investments in affiliates | (46,229) | (45,286) |
Advances to affiliates | (15,398) | (15,349) |
Total assets | (61,627) | (60,635) |
Current liabilities: |  |  |
Due to affiliates | (21,748) | (21,701) |
Total liabilities | (21,748) | (21,701) |
Equity: |  |  |
Stockholders' equity | (46,229) | (45,286) |
Advances to affiliates | 6,350 | 6,352 |
Total equity | (39,879) | (38,934) |
Total liabilities and equity | (61,627) | (60,635) |
WM [Member] | Reportable Legal Entities [Member] |  |  |
Current assets: |  |  |
Other current assets | 139 | 5 |
Total current assets | 139 | 5 |
Investments in affiliates | 22,878 | 22,393 |
Other assets | 5 | 9 |
Total assets | 23,022 | 22,407 |
Current liabilities: |  |  |
Current portion of long-term debt | 544 | 537 |
Accounts payable and other current liabilities | 76 | 55 |
Total current liabilities | 620 | 592 |
Long-term debt, less current portion | 6,954 | 6,457 |
Due to affiliates | 15,472 | 15,404 |
Other liabilities | 5 | 8 |
Total liabilities | 23,051 | 22,461 |
Equity: |  |  |
Stockholders' equity | 6,044 | 6,019 |
Advances to affiliates | (6,073) | (6,073) |
Total equity | (29) | (54) |
Total liabilities and equity | 23,022 | 22,407 |
WM Holdings [Member] | Reportable Legal Entities [Member] |  |  |
Current assets: |  |  |
Other current assets | 5 | 5 |
Total current assets | 5 | 5 |
Investments in affiliates | 23,351 | 22,893 |
Other assets | 31 | 31 |
Total assets | 23,387 | 22,929 |
Current liabilities: |  |  |
Accounts payable and other current liabilities | 3 | 9 |
Total current liabilities | 3 | 9 |
Long-term debt, less current portion | 304 | 304 |
Due to affiliates | 203 | 224 |
Total liabilities | 510 | 537 |
Equity: |  |  |
Stockholders' equity | 22,877 | 22,392 |
Total equity | 22,877 | 22,392 |
Total liabilities and equity | 23,387 | 22,929 |
Non-Guarantor Subsidiaries [Member] | Reportable Legal Entities [Member] |  |  |
Current assets: |  |  |
Cash and cash equivalents | 52 | 22 |
Other current assets | 2,295 | 2,592 |
Total current assets | 2,347 | 2,614 |
Property and equipment, net | 11,637 | 11,559 |
Advances to affiliates | 15,398 | 15,349 |
Other assets | 7,942 | 7,606 |
Total assets | 37,324 | 37,128 |
Current liabilities: |  |  |
Current portion of long-term debt | 512 | 202 |
Accounts payable and other current liabilities | 2,238 | 2,459 |
Total current liabilities | 2,750 | 2,661 |
Long-term debt, less current portion | 1,643 | 1,991 |
Due to affiliates | 6,073 | 6,073 |
Other liabilities | 3,762 | 3,765 |
Total liabilities | 14,228 | 14,490 |
Equity: |  |  |
Stockholders' equity | 23,352 | 22,894 |
Advances to affiliates | (277) | (279) |
Noncontrolling interests | 21 | 23 |
Total equity | 23,096 | 22,638 |
Total liabilities and equity | $ 37,324 | $ 37,128 |

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