Customer Deposits (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
U.S.:
Interest-bearing	$ 109,119	$ 83,304
Non-interest-bearing (includes Card Member credit balances of: 2022, $605; 2021, $527)	663	553
Non-U.S.:
Interest-bearing	15	18
Non-interest-bearing (includes Card Member credit balances of: 2022, $439; 2021, $503)	442	507
Total customer deposits	110,239	84,382
Card Member Credit Balances
U.S.:
Non-interest-bearing (includes Card Member credit balances of: 2022, $605; 2021, $527)	605	527
Non-U.S.:
Non-interest-bearing (includes Card Member credit balances of: 2022, $439; 2021, $503)	$ 439	$ 503

The aggregate of all deposit liabilities held by the entity, including foreign and domestic, interest and noninterest bearing; may include demand deposits, saving deposits, Negotiable Order of Withdrawal (NOW) and time deposits among others.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
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Total amount of interest-bearing domestic deposit liabilities, which may include brokered, retail, demand, checking, notice of withdrawal, money market and other interest-bearing deposits.

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- Definition

Amount of foreign interest-bearing deposits held by the entity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
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-Section S99
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
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-Subparagraph (SX 210.9-03.12)
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

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Amount of domestic noninterest-bearing deposits held by the entity, which may include demand deposits, checking, brokered and retail deposits.

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Amount of foreign noninterest-bearing deposits held by the entity which may include demand deposits, checking, brokered and retail deposits.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 235
-Section S99
-Paragraph 1
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-URI https://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884

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-Subparagraph (SX 210.9-03.12)
-URI https://asc.fasb.org/extlink&oid=126897435&loc=d3e534808-122878

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