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Segment and Related Information - Summary (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating revenues | $ 3,652 | $ 3,716 | $ 3,677 | $ 3,440 | $ 3,460 | $ 3,548 | $ 3,425 | $ 3,176 | $ 14,485 | $ 13,609 | $ 12,961
Income from operations | 704 | $ 701 | $ 673 | $ 558 | 617 | $ 560 | $ 611 | $ 508 | 2,636 | 2,296 | 2,045
Depreciation and amortization |  |  |  |  |  |  |  |  | 1,376 | 1,301 | 1,245
Capital Expenditures |  |  |  |  |  |  |  |  | 1,568 | 1,347 | 1,229
Total Assets | 21,829 |  |  |  | 20,859 |  |  |  | 21,829 | 20,859 | 20,367
Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | 17,370 | 16,246 | 15,350
Total Assets | 22,116 |  |  |  | 21,137 |  |  |  | 22,116 | 21,137 | 20,906
Intercompany Operating Revenues [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | (2,885) | (2,637) | (2,389)
Corporate and Other [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income from operations |  |  |  |  |  |  |  |  | (585) | (550) | (522)
Depreciation and amortization |  |  |  |  |  |  |  |  | 45 | 56 | 64
Capital Expenditures |  |  |  |  |  |  |  |  | 92 | 45 | 56
Total Assets | 1,327 |  |  |  | 1,401 |  |  |  | 1,327 | 1,401 | 1,783
Elimination of Intercompany Investments and Advances [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total Assets | (287) |  |  |  | (278) |  |  |  | (287) | (278) | (539)
Operating Group Total [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | 14,485 | 13,609 | 12,961
Operating Group Total [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | 17,370 | 16,246 | 15,350
Income from operations |  |  |  |  |  |  |  |  | 3,221 | 2,846 | 2,567
Depreciation and amortization |  |  |  |  |  |  |  |  | 1,331 | 1,245 | 1,181
Capital Expenditures |  |  |  |  |  |  |  |  | 1,476 | 1,302 | 1,173
Total Assets | 20,789 |  |  |  | 19,736 |  |  |  | 20,789 | 19,736 | 19,123
Operating Group Total [Member] | Intercompany Operating Revenues [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | (2,885) | (2,637) | (2,389)
Solid Waste [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | 12,167 | 11,516 | 11,003
Solid Waste [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | 14,832 | 13,968 | 13,285
Income from operations |  |  |  |  |  |  |  |  | 3,289 | 2,946 | 2,727
Depreciation and amortization |  |  |  |  |  |  |  |  | 1,228 | 1,144 | 1,087
Capital Expenditures |  |  |  |  |  |  |  |  | 1,383 | 1,198 | 1,045
Total Assets | 19,004 |  |  |  | 18,247 |  |  |  | 19,004 | 18,247 | 17,422
Solid Waste [Member] | Intercompany Operating Revenues [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | (2,665) | (2,452) | (2,282)
Tier 1 [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | 4,574 | 4,330 | 4,227
Tier 1 [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | 5,576 | 5,241 | 5,083
Income from operations |  |  |  |  |  |  |  |  | 1,538 | 1,430 | 1,290
Depreciation and amortization |  |  |  |  |  |  |  |  | 451 | 424 | 428
Capital Expenditures |  |  |  |  |  |  |  |  | 603 | 452 | 382
Total Assets | 6,528 |  |  |  | 6,188 |  |  |  | 6,528 | 6,188 | 6,098
Tier 1 [Member] | Intercompany Operating Revenues [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | (1,002) | (911) | (856)
Tier 2 [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | 2,116 | 1,996 | 1,933
Tier 2 [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | 2,559 | 2,400 | 2,322
Income from operations |  |  |  |  |  |  |  |  | 552 | 522 | 446
Depreciation and amortization |  |  |  |  |  |  |  |  | 203 | 190 | 190
Capital Expenditures |  |  |  |  |  |  |  |  | 185 | 157 | 147
Total Assets | 3,749 |  |  |  | 3,562 |  |  |  | 3,749 | 3,562 | 3,497
Tier 2 [Member] | Intercompany Operating Revenues [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | (443) | (404) | (389)
Tier 3 [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | 5,477 | 5,190 | 4,843
Tier 3 [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | 6,697 | 6,327 | 5,880
Income from operations |  |  |  |  |  |  |  |  | 1,199 | 994 | 991
Depreciation and amortization |  |  |  |  |  |  |  |  | 574 | 530 | 469
Capital Expenditures |  |  |  |  |  |  |  |  | 595 | 589 | 516
Total Assets | 8,727 |  |  |  | 8,497 |  |  |  | 8,727 | 8,497 | 7,827
Tier 3 [Member] | Intercompany Operating Revenues [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | (1,220) | (1,137) | (1,037)
Other [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | 2,318 | 2,093 | 1,958
Other [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | 2,538 | 2,278 | 2,065
Income from operations |  |  |  |  |  |  |  |  | (68) | (100) | (160)
Depreciation and amortization |  |  |  |  |  |  |  |  | 103 | 101 | 94
Capital Expenditures |  |  |  |  |  |  |  |  | 93 | 104 | 128
Total Assets | $ 1,785 |  |  |  | $ 1,489 |  |  |  | 1,785 | 1,489 | 1,701
Other [Member] | Intercompany Operating Revenues [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  | $ (220) | $ (185) | $ (107)

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