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Fair Value Measurements - Assets and Liabilities at Fair Value, Nonrecurring (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 USD ($) | Jun. 30, 2021 USD ($)
Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Total Assets at Fair Value | $ 15 | $ 15
Nonrecurring Basis |  |
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 | 15 | 15
Total Assets at Fair Value | 15 | 15
Properties, plant and equipment, net (held and used), Before-Tax Loss | 0 | 0
Properties, plant and equipment, net (held for sale), Before-Tax Loss | 0 | 0
Investments and advances, Before-Tax Loss | 11 | 21
Total Assets at Fair Value, Before-Tax Loss | 11 | 21
Nonrecurring Basis | 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
Nonrecurring Basis | Level 2 |  |
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
Nonrecurring Basis | Level 3 |  |
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 | 15 | 15
Total Assets at Fair Value | $ 15 | $ 15

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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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