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Fair Value of Financial Instruments- Equity Method Investments (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Investments in unconsolidated affiliates	$ 2,486	$ 1,294
Total, investments in unconsolidated affiliates and equity securities		1,294
Fair Value Measured at NAV
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Equity securities (NAV)	48	0
Total, investments in unconsolidated affiliates and equity securities	2,534
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Investments in unconsolidated affiliates	136	146
Equity Method Investment, Nonconsolidated Investee or Group of Investees | Fair Value Measured at NAV
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share [Line Items]
Investments in unconsolidated affiliates	$ 2,350	$ 1,148

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Equity Method Investments and Equity Securities at NAV, Total

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Amount of investment in equity security without readily determinable fair value.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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