Equity Securities Net Gains (Losses) from Equity Securities (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Net Gains (Losses) from Equity Securities [Line Items]
Total net gains (losses) from equity securities not held for trading	$ (34)	$ 869	$ (73)	$ 3,957
Not designated as hedging instrument [Member]
Net Gains (Losses) from Equity Securities [Line Items]
Net gains (losses) from economic hedge derivatives	6,114	486	17,395	(752)
Economic hedges [Member]
Net Gains (Losses) from Equity Securities [Line Items]
Net gains (losses) from economic hedge derivatives	617	832	1,012	378
Net gains (losses) from equity securities [Member] \| Economic hedges [Member]
Net Gains (Losses) from Equity Securities [Line Items]
Net gains (losses) from economic hedge derivatives	0	564	0	227
Equity securities [Member] \| Net gains (losses) from equity securities [Member]
Net Gains (Losses) from Equity Securities [Line Items]
Total equity securities carried at fair value	(57)	(679)	(323)	(10)
Marketable equity securities [Member] \| Net gains (losses) from equity securities [Member]
Net Gains (Losses) from Equity Securities [Line Items]
Total equity securities carried at fair value	(22)	(157)	(250)	(23)
Nonmarketable equity securities [Member] \| Net gains (losses) from equity securities [Member]
Net Gains (Losses) from Equity Securities [Line Items]
Total equity securities carried at fair value	(35)	(522)	(73)	13
Total nonmarketable equity securities not carried at fair value	23	984	250	3,740
Nonmarketable equity securities [Member] \| Impairment write-downs [Member]
Net Gains (Losses) from Equity Securities [Line Items]
Total nonmarketable equity securities not carried at fair value	(389)	(23)	(1,403)	(80)
Nonmarketable equity securities [Member] \| Net unrealized gains (losses) [Member]
Net Gains (Losses) from Equity Securities [Line Items]
Total nonmarketable equity securities not carried at fair value	82	816	916	3,078
Nonmarketable equity securities [Member] \| Net realized gains from sale [Member]
Net Gains (Losses) from Equity Securities [Line Items]
Total nonmarketable equity securities not carried at fair value	$ 330	$ 191	$ 737	$ 742

Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4CC
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL109998890-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (e)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624171-113959

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

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 321
-SubTopic 10
-Section 50
-Paragraph 4
-URI https://asc.fasb.org/extlink&oid=126980263&loc=SL75117546-209714

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The revenue derived from equity investments held at fair value (excluding trading securities), and investments accounted for under both the equity method and measurement alternative. Includes marketable equity securities, private equity, and principal investments: includes realized investment gains or losses.

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[Line Items] for Net Gains (Losses) from Equity Securities [Table]

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