Loans - By Portfolio Segment (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022
Loan balances by portfolio segment:
Retained loans	$ 1,265,941	$ 1,089,598	$ 1,068,073
Held-for-sale	5,310	3,970
Loans at fair value	38,808	42,079
Total	1,310,059	1,135,647
Accrued interest receivables	6,500	5,200
Consumer, excluding credit card
Loan balances by portfolio segment:
Retained loans	397,054	300,753	301,403
Held-for-sale	438	618
Loans at fair value	11,277	10,004
Total	408,769	311,375
Consumer, excluding credit card \| First Republic
Loan balances by portfolio segment:
Retained loans	91,200
Loans at fair value	1,800
Credit card
Loan balances by portfolio segment:
Retained loans	196,935	185,175
Held-for-sale	0	0
Loans at fair value	0	0
Total	196,935	185,175
Wholesale
Loan balances by portfolio segment:
Retained loans	671,952	603,670	$ 596,208
Held-for-sale	4,872	3,352
Loans at fair value	27,531	32,075
Total	704,355	$ 639,097
Wholesale \| First Republic
Loan balances by portfolio segment:
Retained loans	$ 53,800

Financing Receivable, Excluding Accrued Interest, Before Allowance For Credit Losses, Net of Deferred Income

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- Definition

Amount, before allowance for credit loss, of accrued interest on financing receivable.

+ References

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-Topic 326
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- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ References

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-Topic 326
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Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

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- Definition

Amount, after valuation allowance, of financing receivable held for sale and not part of disposal group. Excludes loan covered under loss sharing agreement and loan classified as investment in debt security.

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