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Investments (Narrative) (Details) $ in Millions	Mar. 31, 2022 USD ($) reportableSegments	Dec. 31, 2021 USD ($)
Investments [Abstract]
Equity Securities, FV-NI	$ 3,500	$ 3,500
Equity Method Investments	$ 1,300	$ 1,300
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | reportableSegments	27,000
Total number of security positions	39,000

X

- Definition

Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

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- Definition

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

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current.

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Balance held at close of period in number of contracts.

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