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Segment and Related Information - Reportable Segments (Detail) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Operating revenues | $ 3,460 | $ 3,548 | $ 3,425 | $ 3,176 | $ 3,246 | $ 3,360 | $ 3,315 | $ 3,040 | $ 13,609 | $ 12,961 | $ 13,996
Income from operations | 617 | $ 560 | $ 611 | $ 508 | 502 | $ 601 | $ 502 | $ 440 | 2,296 | 2,045 | 2,299
Depreciation and amortization |  |  |  |  |  |  |  |  | 1,301 | 1,245 | 1,292
Capital Expenditures |  |  |  |  |  |  |  |  | 1,347 | 1,229 | 1,181
Total Assets | 20,859 |  |  |  | 20,367 |  |  |  | 20,859 | 20,367 | 21,252
Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Operating revenues |  |  |  |  |  |  |  |  | 16,246 | 15,350 | 16,457
Total Assets | 21,137 |  |  |  | 20,906 |  |  |  | 21,137 | 20,906 | 21,843
Intercompany Operating Revenues [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Operating revenues |  |  |  |  |  |  |  |  | (2,637) | (2,389) | (2,461)
Corporate and Other [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Income from operations |  |  |  |  |  |  |  |  | (550) | (522) | (769)
Depreciation and amortization |  |  |  |  |  |  |  |  | 56 | 64 | 71
Capital Expenditures |  |  |  |  |  |  |  |  | 45 | 56 | 74
Total Assets | 1,401 |  |  |  | 1,783 |  |  |  | 1,401 | 1,783 | 2,805
Solid Waste: Tier 1 [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Operating revenues |  |  |  |  |  |  |  |  | 4,330 | 4,227 | 4,283
Income from operations |  |  |  |  |  |  |  |  | 1,430 | 1,290 | 1,301
Depreciation and amortization |  |  |  |  |  |  |  |  | 424 | 428 | 408
Capital Expenditures |  |  |  |  |  |  |  |  | 452 | 382 | 388
Solid Waste: Tier 1 [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Operating revenues |  |  |  |  |  |  |  |  | 5,241 | 5,083 | 5,117
Total Assets | 6,188 |  |  |  | 6,098 |  |  |  | 6,188 | 6,098 | 6,150
Solid Waste: Tier 1 [Member] | Intercompany Operating Revenues [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Operating revenues |  |  |  |  |  |  |  |  | (911) | (856) | (834)
Solid Waste: Tier 2 [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Operating revenues |  |  |  |  |  |  |  |  | 2,771 | 2,691 | 2,853
Income from operations |  |  |  |  |  |  |  |  | 604 | 629 | 711
Depreciation and amortization |  |  |  |  |  |  |  |  | 280 | 280 | 287
Capital Expenditures |  |  |  |  |  |  |  |  | 295 | 251 | 223
Solid Waste: Tier 2 [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Operating revenues |  |  |  |  |  |  |  |  | 3,391 | 3,304 | 3,516
Total Assets | 5,488 |  |  |  | 5,394 |  |  |  | 5,488 | 5,394 | 5,648
Solid Waste: Tier 2 [Member] | Intercompany Operating Revenues [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Operating revenues |  |  |  |  |  |  |  |  | (620) | (613) | (663)
Solid Waste: Tier 3 [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Operating revenues |  |  |  |  |  |  |  |  | 4,415 | 4,085 | 4,030
Income from operations |  |  |  |  |  |  |  |  | 912 | 808 | 787
Depreciation and amortization |  |  |  |  |  |  |  |  | 440 | 379 | 361
Capital Expenditures |  |  |  |  |  |  |  |  | 451 | 412 | 351
Solid Waste: Tier 3 [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Operating revenues |  |  |  |  |  |  |  |  | 5,336 | 4,898 | 4,816
Total Assets | 6,571 |  |  |  | 5,930 |  |  |  | 6,571 | 5,930 | 5,449
Solid Waste: Tier 3 [Member] | Intercompany Operating Revenues [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Operating revenues |  |  |  |  |  |  |  |  | (921) | (813) | (786)
Other [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Operating revenues |  |  |  |  |  |  |  |  | 2,093 | 1,958 | 2,115
Income from operations |  |  |  |  |  |  |  |  | (100) | (160) | (400)
Depreciation and amortization |  |  |  |  |  |  |  |  | 101 | 94 | 128
Capital Expenditures |  |  |  |  |  |  |  |  | 104 | 128 | 134
Other [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Operating revenues |  |  |  |  |  |  |  |  | 2,278 | 2,065 | 2,191
Total Assets | 1,489 |  |  |  | 1,701 |  |  |  | 1,489 | 1,701 | 1,791
Other [Member] | Intercompany Operating Revenues [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Operating revenues |  |  |  |  |  |  |  |  | (185) | (107) | (76)
Wheelabrator [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Operating revenues |  |  |  |  |  |  |  |  |  |  | 715
Income from operations |  |  |  |  |  |  |  |  |  |  | 669
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 37
Capital Expenditures |  |  |  |  |  |  |  |  |  |  | 11
Wheelabrator [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Operating revenues |  |  |  |  |  |  |  |  |  |  | 817
Wheelabrator [Member] | Intercompany Operating Revenues [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Operating revenues |  |  |  |  |  |  |  |  |  |  | (102)
Operating Group Total [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Operating revenues |  |  |  |  |  |  |  |  | 13,609 | 12,961 | 13,996
Income from operations |  |  |  |  |  |  |  |  | 2,846 | 2,567 | 3,068
Depreciation and amortization |  |  |  |  |  |  |  |  | 1,245 | 1,181 | 1,221
Capital Expenditures |  |  |  |  |  |  |  |  | 1,302 | 1,173 | 1,107
Operating Group Total [Member] | Operating Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Operating revenues |  |  |  |  |  |  |  |  | 16,246 | 15,350 | 16,457
Total Assets | $ 19,736 |  |  |  | $ 19,123 |  |  |  | 19,736 | 19,123 | 19,038
Operating Group Total [Member] | Intercompany Operating Revenues [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Gross Operating revenues |  |  |  |  |  |  |  |  | $ (2,637) | $ (2,389) | $ (2,461)

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