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Goodwill (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Changes in goodwill |  |  |  |
Balance at beginning of period | $ 2,540 | $ 0 | $ 2,540 |
Acquisitions |  |  | 2 |
Goodwill, gross |  |  | 2,542 |
Goodwill impairment losses | 2,515 | 0 | 2,515 | $ 0
Foreign currency translation adjustments |  |  | (27) |
Accumulated impairment losses |  |  | (2,542) |
Balance at end of period |  |  | 0 | 2,540
Operating Segments | Crude Oil |  |  |  |
Changes in goodwill |  |  |  |
Balance at beginning of period | 2,300 | 0 | 2,300 |
Acquisitions |  |  | 2 |
Goodwill, gross |  |  | 2,302 |
Goodwill impairment losses |  |  | 2,287 |
Foreign currency translation adjustments |  |  | (15) |
Accumulated impairment losses |  |  | (2,302) |
Balance at end of period |  |  | 0 | 2,300
Operating Segments | NGL |  |  |  |
Changes in goodwill |  |  |  |
Balance at beginning of period | $ 240 | $ 0 | 240 |
Acquisitions |  |  | 0 |
Goodwill, gross |  |  | 240 |
Goodwill impairment losses |  |  | 228 |
Foreign currency translation adjustments |  |  | (12) |
Accumulated impairment losses |  |  | (240) |
Balance at end of period |  |  | $ 0 | $ 240
Level 3 | Valuation Technique, Discounted Cash Flow |  |  |  |
Goodwill |  |  |  |
Goodwill impairment analysis, projected cash flows, period | 6 years |  |  |
Level 3 | Valuation Technique, Discounted Cash Flow | Measurement Input, Discount Rate |  |  |  |
Goodwill |  |  |  |
Goodwill impairment analysis, discount rate, cost of capital, theoretical market participant | 14.00% |  |  |

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- Definition Amount after accumulated impairment loss of an asset representing 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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + Details
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