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Asset Impairments and Unusual Items - Details (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Sep. 30, 2017 | Mar. 31, 2017 | Sep. 30, 2016 | Jun. 30, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items] |  |  |  |  |  |  |  |
Gain (loss) on sale of assets |  |  |  |  |  | $ 38 | $ (9) | $ 7
Goodwill impairment charges | $ 34 |  |  |  |  | 34 | 12 |
Asset impairments |  |  |  |  |  | 41 | 59 | 89
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 |  |  |  |  | 31 |  | 6
Impairment of oil and gas producing property |  |  |  |  |  |  |  | 66
Energy and Environmental Services [Member] |  |  |  |  |  |  |  |
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items] |  |  |  |  |  |  |  |
Decrease in contingent consideration | (30) |  |  |  |  | (30) |  |
Goodwill impairment charges | 32 |  |  |  |  | 34 |  |
Renewable Energy Assets [Member] |  |  |  |  |  |  |  |
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items] |  |  |  |  |  |  |  |
Asset impairments |  |  |  |  |  | 7 |  |
Western Pennsylvania [Member] |  |  |  |  |  |  |  |
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items] |  |  |  |  |  |  |  |
Asset impairments |  |  |  | $ 43 |  |  | 43 |
Lamp Tracker Reporting Unit [Member] |  |  |  |  |  |  |  |
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items] |  |  |  |  |  |  |  |
Goodwill impairment charges | 2 |  |  | 10 |  |  | 12 |
Investment In Majority Owned Organics Company [Member] |  |  |  |  |  |  |  |
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items] |  |  |  |  |  |  |  |
Gain (loss) on sale of assets |  |  |  | (8) |  |  | (8) |
Recycling Operations [Member] |  |  |  |  |  |  |  |
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items] |  |  |  |  |  |  |  |
Asset impairments |  |  |  |  |  |  |  | 18
Western Canada Area [Member] |  |  |  |  |  |  |  |
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items] |  |  |  |  |  |  |  |
Asset impairments |  |  |  |  |  |  |  | 5
Waste Diversion Technology Company [Member] |  |  |  |  |  |  |  |
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items] |  |  |  |  |  |  |  |
Equity method investments impairment charges |  |  | $ 25 |  |  | 29 |  |
Cost method investment impairment | $ 11 |  |  |  | $ 45 | 11 | 42 | $ 5
San Jacinto Waste Pits [Member] |  |  |  |  |  |  |  |
Income Expense From Divestitures Asset Impairments And Unusual Items [Line Items] |  |  |  |  |  |  |  |
Revisions in estimate |  | $ 9 |  | $ 42 |  | $ 11 | $ 44 |

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- Definition Amount of expense (reversal of expense) which increases (decreases) the accrual for environmental loss contingencies from revisions in estimates to existing obligations. Excludes changes related to business acquisitions, divestitures, or currency movement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.Y.Q2) -URI http://asc.fasb.org/extlink&oid=27011672&loc=d3e149879-122751 + Details
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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2420-110228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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- Definition Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479 + Details
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- Definition This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the cost method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=75025870&loc=d3e40691-111596 + Details
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- Definition This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 35 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=99375318&loc=d3e32787-111569 + Details
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- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2443-110228 + Details
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- Definition Amount of gain (loss) on sale or disposal of proven and unproven oil and gas properties. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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- Definition Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13777-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition The expense recorded to reduce the value of oil and gas assets consisting of proved properties and unproved properties as the estimate of future successful production from these properties is reduced. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84176398&loc=d3e2921-110230 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 360 -Section 35 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=66906256&loc=d3e66150-109466 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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