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Asset Impairments and Unusual Items - Details (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items] |  |  |  |  |  |  |  |  |
Asset impairments |  | $ 16 |  | $ 8 |  |  | $ 42 | $ 38 | $ 41
Goodwill impairment charges | $ 27 |  |  |  |  |  | 27 | 6 | 34
Solid waste operations impairment | 10 | $ 7 |  |  |  |  | 15 |  |
(Gain) loss from divestitures, asset impairments and unusual items, net |  |  |  |  |  |  | 42 | (58) | (16)
Gain (loss) on sale of assets |  |  |  |  |  | $ 40 |  | 96 | 38
Increase (decrease) in contingent consideration |  |  |  |  |  |  | (6) |  |
Investment impairment |  |  | $ 52 |  |  |  | 52 |  |
San Jacinto Waste Pits [Member] |  |  |  |  |  |  |  |  |
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items] |  |  |  |  |  |  |  |  |
Revisions in estimate |  |  |  |  |  |  |  |  | 11
Waste Diversion Technology Company [Member] |  |  |  |  |  |  |  |  |
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items] |  |  |  |  |  |  |  |  |
Equity method investments impairment charges |  |  |  |  |  |  |  |  | 29
Cost method investment impairment |  |  |  |  |  |  |  |  | 11
Oil and Gas Well [Member] |  |  |  |  |  |  |  |  |
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items] |  |  |  |  |  |  |  |  |
Gains from sale of oil and gas properties |  |  |  |  |  |  |  |  | 31
Energy and Environmental Services [Member] |  |  |  |  |  |  |  |  |
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items] |  |  |  |  |  |  |  |  |
Increase (decrease) in contingent consideration |  |  |  |  |  |  |  |  | (30)
Renewable Energy Assets [Member] |  |  |  |  |  |  |  |  |
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items] |  |  |  |  |  |  |  |  |
Asset impairments |  |  |  |  |  |  |  |  | $ 7
Energy and Environmental Services [Member] |  |  |  |  |  |  |  |  |
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items] |  |  |  |  |  |  |  |  |
Goodwill impairment charges | 17 |  |  |  |  |  | 17 |  |
Lamp Tracker Reporting Unit [Member] |  |  |  |  |  |  |  |  |
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items] |  |  |  |  |  |  |  |  |
Goodwill impairment charges | $ 10 |  |  |  |  |  | 10 |  |
Landfill [Member] |  |  |  |  |  |  |  |  |
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items] |  |  |  |  |  |  |  |  |
Asset impairments |  |  |  |  | $ 29 |  |  | 30 |
Tier 1 [Member] |  |  |  |  |  |  |  |  |
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items] |  |  |  |  |  |  |  |  |
Gain (loss) on sale of assets |  |  |  | $ 52 |  |  |  | 52 |
Other [Member] |  |  |  |  |  |  |  |  |
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items] |  |  |  |  |  |  |  |  |
Goodwill impairment charges |  |  |  |  |  |  | $ 27 | 6 |
Gain (loss) on sale of assets |  |  |  |  |  |  |  | $ 44 |

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