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Fair Value Measurements - Summary of Assets and Liabilities Measured On a Non-Recurring Basis (Details) - Nonrecurring basis - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Properties, plant and equipment, net (held and used) | $ 124 | $ 2,443
Properties, plant and equipment, net (held for sale) | 0 | 1,418
Investments and advances | 16 | 28
Total assets at fair value | 140 | 3,889
Properties, plant and equipment, net (held and used), Before-Tax Loss | 414 | 2,599
Properties, plant and equipment, net (held for sale), Before-Tax Loss | 0 | 193
Investments and advances, Before-Tax Loss | 32 | 2,555
Total nonrecurring assets at fair value, Before-Tax Loss | 446 | 5,347
Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Properties, plant and equipment, net (held and used) | 0 | 0
Properties, plant and equipment, net (held for sale) | 0 | 0
Investments and advances | 0 | 0
Total assets at fair value | 0 | 0
Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Properties, plant and equipment, net (held and used) | 0 | 20
Properties, plant and equipment, net (held for sale) | 0 | 1,418
Investments and advances | 0 | 0
Total assets at fair value | 0 | 1,438
Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Properties, plant and equipment, net (held and used) | 124 | 2,423
Properties, plant and equipment, net (held for sale) | 0 | 0
Investments and advances | 16 | 28
Total assets at fair value | $ 140 | $ 2,451

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- Definition Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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- Definition Fair value portion of investments in an entity not consolidated. Includes, but is not limited to, investments in an entity that is affiliated with the reporting entity by means of direct or indirect ownership, an entity in which the reporting entity shares control of the entity with another party or group, an entity which the company has significant influence, but does not have control and subsidiaries that are not required to be consolidated and are accounted for using the equity or cost method. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123874694&loc=d3e19207-110258 + Details
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