Regulatory Capital (Details) (USD $)	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012
Regulatory capital
Tier 1 capital	$ 164,027,000,000		$ 160,002,000,000
Total capital	199,148,000,000		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	242,000,000		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 Risk-weighted Assets Upon Implementation of Basel 2.5 Final Market Risk Rule		150,000,000,000
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%)
Regulatory capital
Tier 1 capital	164,027,000,000		160,002,000,000
Total capital	199,148,000,000		194,036,000,000
Assets
Risk-weighted assets	1,410,081,000,000		1,270,378,000,000
Adjusted average assets	2,333,416,000,000		2,243,242,000,000
Capital ratios
Tier 1 capital	11.60%		12.60%
Total capital	14.10%		15.30%
Tier 1 leverage	7.00%		7.10%
Trust preferred capital debt securities	5,300,000,000
Tier 1 capital, excluding trust preferred capital debt securities	158,800,000,000
Tier 1 capital ratio, excluding trust preferred capital debt securities	11.30%
Off-balance Sheet Risk-weighted Assets	318,500,000,000		304,500,000,000
JPMorgan Chase Bank, N.A.
Compliance with Regulatory Capital Requirements under Banking Regulations
Impact to Risk-weighted Assets Upon Implementation of Basel 2.5 Final Market Risk Rule		140,000,000,000
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%)
Regulatory capital
Tier 1 capital	120,912,000,000		111,827,000,000
Total capital	155,502,000,000		146,870,000,000
Assets
Risk-weighted assets	1,207,865,000,000		1,094,155,000,000
Adjusted average assets	1,905,940,000,000		1,815,816,000,000
Capital ratios
Tier 1 capital	10.00%		10.20%
Total capital	12.90%		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	120,300,000,000
Tier 1 capital ratio, excluding trust preferred capital debt securities	10.00%
Off-balance Sheet Risk-weighted Assets	309,000,000,000		297,100,000,000
Chase Bank USA, N.A.
Regulatory capital
Tier 1 capital	11,142,000,000		9,648,000,000
Total capital	14,582,000,000		13,131,000,000
Assets
Risk-weighted assets	101,014,000,000		103,593,000,000
Adjusted average assets	104,119,000,000		103,688,000,000
Capital ratios
Tier 1 capital	11.00%		9.30%
Total capital	14.40%		12.70%
Tier 1 leverage	10.70%		9.30%
Trust preferred capital debt securities	0
Off-balance Sheet Risk-weighted Assets	$ 14,000,000		$ 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%