Regulatory Capital (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Regulatory capital
Tier 1 capital	$ 163,807,000,000	$ 160,002,000,000
Total capital	198,926,000,000	194,036,000,000
Capital ratios
Tier 1 capital - Well capitalized ratio	6.00%
Tier 1 capital - Minimum capital ratio	4.00%
Total capital - Well-capitalized ratio	10.00%
Total capital - Minimum capital ratio	8.00%
Tier 1 leverage - Well-capitalized ratio	5.00%
Tier 1 leverage - Minimum capital ratio	3.00%
Adjustments to Capital for Deferred Tax Liabilities [Abstract]
Adjustments to Capital for Deferred Tax Liabilities Resulting from Nontaxable Business Combinations	267,000,000	291,000,000
Adjustments to Capital for Deferred Tax Liabilities Resulting from Tax-deductible Goodwill	2,600,000,000	2,500,000,000
JPMorgan Chase & Co.
Compliance with Regulatory Capital Requirements under Banking Regulations
Impact to Tier 1 Capital Ratio Upon Implementation of Basel 2.5 Final Market Risk Rule	(1.40%)
Impact to Total Capital Ratio Upon Implementation of Basel 2.5 Final Market Risk Rule	(1.60%)
Impact to Risk-weighted Assets Upon Implementation of Basel 2.5 Final Market Risk Rule	150,000,000,000
Regulatory capital
Tier 1 capital	163,807,000,000	160,002,000,000
Total capital	198,926,000,000	194,036,000,000
Assets
Risk-weighted assets	1,406,948,000,000	1,270,378,000,000
Adjusted average assets	2,255,697,000,000	2,243,242,000,000
Capital ratios
Tier 1 capital	11.60%	12.60%
Total capital	14.10%	15.30%
Tier 1 leverage	7.30%	7.10%
Trust preferred capital debt securities	10,200,000,000
Tier 1 capital, excluding trust preferred capital debt securities	153,600,000,000
Tier 1 capital ratio, excluding trust preferred capital debt securities	10.90%
Off-balance Sheet Risk-weighted Assets	310,700,000,000	304,500,000,000
JPMorgan Chase Bank, N.A.
Compliance with Regulatory Capital Requirements under Banking Regulations
Impact to Tier 1 Capital Ratio Upon Implementation of Basel 2.5 Final Market Risk Rule	(1.30%)
Impact to Total Capital Ratio Upon Implementation of Basel 2.5 Final Market Risk Rule	(1.50%)
Impact to Risk-weighted Assets Upon Implementation of Basel 2.5 Final Market Risk Rule	140,000,000,000
Regulatory capital
Tier 1 capital	116,268,000,000	111,827,000,000
Total capital	152,611,000,000	146,870,000,000
Assets
Risk-weighted assets	1,212,582,000,000	1,094,155,000,000
Adjusted average assets	1,836,492,000,000	1,815,816,000,000
Capital ratios
Tier 1 capital	9.60%	10.20%
Total capital	12.60%	13.40%
Tier 1 leverage	6.30%	6.20%
Trust preferred capital debt securities	600,000,000
Tier 1 capital, excluding trust preferred capital debt securities	115,700,000,000
Tier 1 capital ratio, excluding trust preferred capital debt securities	9.50%
Off-balance Sheet Risk-weighted Assets	300,300,000,000	297,100,000,000
Chase Bank USA, N.A.
Regulatory capital
Tier 1 capital	10,426,000,000	9,648,000,000
Total capital	13,842,000,000	13,131,000,000
Assets
Risk-weighted assets	98,613,000,000	103,593,000,000
Adjusted average assets	104,019,000,000	103,688,000,000
Capital ratios
Tier 1 capital	10.60%	9.30%
Total capital	14.00%	12.70%
Tier 1 leverage	10.00%	9.30%
Trust preferred capital debt securities	0
Off-balance Sheet Risk-weighted Assets	$ 15,000,000	$ 16,000,000
Possibility One
Capital ratios
Tier 1 leverage - Minimum capital ratio	3.00%
Possibility Two
Capital ratios
Tier 1 leverage - Minimum capital ratio	4.00%