Loans and Allowance for Credit Losses, Loans by Loan to Value Ratio, Consumer (Details) - USD ($) $ in Millions	Jun. 30, 2015		Dec. 31, 2014
By LTV/CLTV:
Purchased Credit Impaired Loans (carrying value)	$ 21,555		$ 23,320
Loans	888,459	[1]	862,551
Nonaccrual loans	12,443		12,848
Residential Mortgage [Member]
By LTV/CLTV:
Purchased Credit Impaired Loans (carrying value)	20,682		21,813
Loans	324,032		325,103
Residential Mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
0-60%	115,177		111,322
60.01-80%	105,569		103,763
80.01-100%	37,517		39,174
100.01-120%	12,022		13,387
Greater than 120%	6,461		6,914
No LTV/CLTV available	2,715		2,462
Government insured/guaranteed loans	23,889		26,268
Loans, excluding Purchased Credit Impaired Loans	303,350		303,290
Real estate 1-4 family first mortgage [Member]
By LTV/CLTV:
Purchased Credit Impaired Loans (carrying value)	20,601		21,712
Loans	267,868		265,386
Nonaccrual loans	8,045		8,583
Real estate 1-4 family first mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
0-60%	100,133		95,719
60.01-80%	88,783		86,112
80.01-100%	24,683		25,170
100.01-120%	5,436		6,133
Greater than 120%	2,690		2,856
No LTV/CLTV available	1,653		1,416
Government insured/guaranteed loans	23,889		26,268
Loans, excluding Purchased Credit Impaired Loans	247,267		243,674
Real estate 1-4 family junior lien mortgage [Member]
By LTV/CLTV:
Purchased Credit Impaired Loans (carrying value)	81		101
Loans	56,164		59,717
Nonaccrual loans	1,710		1,848
Real estate 1-4 family junior lien mortgage [Member] | Loans Excluding Purchased Credit-Impaired Loans [Member]
By LTV/CLTV:
0-60%	15,044		15,603
60.01-80%	16,786		17,651
80.01-100%	12,834		14,004
100.01-120%	6,586		7,254
Greater than 120%	3,771		4,058
No LTV/CLTV available	1,062		1,046
Government insured/guaranteed loans	0		0
Loans, excluding Purchased Credit Impaired Loans	$ 56,083		$ 59,616

[1] Parenthetical amounts represent assets and liabilities for which we have elected the fair value option.