Regulatory Capital (Details) (USD $)	0 Months Ended
	Jul. 12, 2012	Dec. 31, 2012	Dec. 31, 2011
Regulatory capital
Tier 1 capital		$ 160,002,000,000	$ 150,384,000,000
Total capital		194,036,000,000	188,088,000,000
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 - Minumum capital ratio		8.00%
Tier 1 leverage - Well-capitalized ratio		5.00%
Tier 1 leverage - Minimum capital ratio		3.00%
Regulatory capital, assets and risk based ratios - supplemental information [Abstract]
Trust preferred capital debt securities		10,399,000,000	20,900,000,000
Adjustments to Capital for Deferred Tax Liabilities [Abstract]
Adjustments to Capital for Deferred Tax Liabilities Resulting from Nontaxable Business Combinations		291,000,000	414,000,000
Adjustments to Capital for Deferred Tax Liabilities Resulting from Tax-deductible Goodwill		2,500,000,000	2,300,000,000
JPMorgan Chase & Co.
Regulatory capital
Tier 1 capital		160,002,000,000	150,384,000,000
Total capital		194,036,000,000	188,088,000,000
Assets
Risk-weighted assets		1,270,378,000,000	1,221,198,000,000
Adjusted average assets		2,243,242,000,000	2,202,087,000,000
Capital ratios
Tier 1 capital		12.60%	12.30%
Total capital		15.30%	15.40%
Tier 1 leverage		7.10%	6.80%
Regulatory capital, assets and risk based ratios - supplemental information [Abstract]
Payments for Repurchase of Trust Preferred Securities	(9,000,000,000)
Trust preferred capital debt securities		10,200,000,000
Tier 1 capital, excluding trust preferred capital debt securities		149,800,000,000
Tier 1 capital ratio, excluding trust preferred capital debt securities		11.80%
Risk-weighted assets, off-balance sheet		304,500,000,000	301,100,000,000
JPMorgan Chase Bank, N.A.
Regulatory capital
Tier 1 capital		111,827,000,000	98,426,000,000
Total capital		146,870,000,000	136,017,000,000
Assets
Risk-weighted assets		1,094,155,000,000	1,042,898,000,000
Adjusted average assets		1,815,816,000,000	1,789,194,000,000
Capital ratios
Tier 1 capital		10.20%	9.40%
Total capital		13.40%	13.00%
Tier 1 leverage		6.20%	5.50%
Regulatory capital, assets and risk based ratios - supplemental information [Abstract]
Trust preferred capital debt securities		600,000,000
Tier 1 capital, excluding trust preferred capital debt securities		111,200,000,000
Tier 1 capital ratio, excluding trust preferred capital debt securities		10.20%
Risk-weighted assets, off-balance sheet		297,100,000,000	291,000,000,000
Chase Bank USA, N.A.
Regulatory capital
Tier 1 capital		9,648,000,000	11,903,000,000
Total capital		13,131,000,000	15,448,000,000
Assets
Risk-weighted assets		103,593,000,000	107,421,000,000
Adjusted average assets		103,688,000,000	106,312,000,000
Capital ratios
Tier 1 capital		9.30%	11.10%
Total capital		12.70%	14.40%
Tier 1 leverage		9.30%	11.20%
Regulatory capital, assets and risk based ratios - supplemental information [Abstract]
Trust preferred capital debt securities		0
Risk-weighted assets, off-balance sheet		$ 16,000,000	$ 38,000,000
Possibility One [Member]
Capital ratios
Tier 1 leverage - Minimum capital ratio		3.00%
Possibility Two [Member]
Capital ratios
Tier 1 leverage - Minimum capital ratio		4.00%