Investments - Equity Investments (Details) - USD ($) $ in Millions	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022
Increase (Decrease) In Equity Investments [Roll Forward]
Marketable securities, beginning balance	$ 399
Marketable securities, Purchases	0
Marketable securities, Sales	0
Marketable securities, Changes in Fair Value	58
Marketable Securities, Other	0
Marketable securities, ending balance	457
Nonmarketable securities, beginning balance	1,331
Nonmarketable Securities, Purchases	61
Nonmarketable Securities, Sales	(44)
Nonmarketable Securities, Changes in Fair Value	(153)
Nonmarketable Securities, Other	(2)
Nonmarketable securities, ending balance	1,193
Total equity investments, beginning balance	1,730
Total equity investments, Purchases	61
Total equity investments, Sales	(44)	$ (7)
Total equity investments, Changes in Fair Value	(95)
Total equity investments, Other	(2)
Total equity investments, ending balance	$ 1,650

Equity Method Investments, Other

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Increase (Decrease) In Equity Investments [Roll Forward]

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Marketable Securities, Other

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- Definition

Nonmarketable Securities

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No definition available.

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- Definition

Nonmarketable Securities, Gains (Losses)

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Nonmarketable Securities, Other

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Nonmarketable Securities, Purchases

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Nonmarketable Securities, Sales

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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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
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- Definition

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

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- Definition

Amount of investment in marketable security.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Amount of unrealized and realized gain (loss) on investment in marketable security, including other-than-temporary impairment (OTTI).

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- Definition

The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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- Definition

Amount of cash outflow for purchase of marketable security.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period.

+ References

No definition available.

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The cash inflow associated with the sale of equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

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