Investments (Equity Securities) (Details Textual) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Equity securities	$ 643		$ 831
Equity Securities, FV-NI, Unrealized Gain (Loss)	(170)	$ (56)
Equity securities without readily determinable fair value	261		262
Income (Loss) from Equity Method Investments	(305)	$ 85
Fair Value, Inputs, Level 1 [Member]
Debt Securities, Available-for-sale [Line Items]
Equity securities	$ 473		$ 611

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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Amount of unrealized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Amount of investment in equity security without readily determinable fair value.

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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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