Loans - Impaired (Details) (USD $)									3 Months Ended		6 Months Ended						6 Months Ended				3 Months Ended		6 Months Ended									3 Months Ended		6 Months Ended									3 Months Ended		6 Months Ended									3 Months Ended		6 Months Ended									3 Months Ended		6 Months Ended								3 Months Ended		6 Months Ended									3 Months Ended		6 Months Ended											3 Months Ended		6 Months Ended		12 Months Ended										3 Months Ended		6 Months Ended									3 Months Ended		6 Months Ended									3 Months Ended		6 Months Ended																	3 Months Ended		6 Months Ended					3 Months Ended		6 Months Ended					3 Months Ended		6 Months Ended					6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012	Jun. 30, 2013 Consumer, excluding credit card	Dec. 31, 2012 Consumer, excluding credit card	Jun. 30, 2012 Consumer, excluding credit card	Jun. 30, 2013 Consumer, excluding credit card Consumer Loan Excluding Credit Card	Dec. 31, 2012 Consumer, excluding credit card Consumer Loan Excluding Credit Card	Jun. 30, 2013 Consumer, excluding credit card Residential Real Estate, Excluding Purchased Credit-Impaired [Member]	Jun. 30, 2012 Consumer, excluding credit card Residential Real Estate, Excluding Purchased Credit-Impaired [Member]	Jun. 30, 2013 Consumer, excluding credit card Residential Real Estate, Excluding Purchased Credit-Impaired [Member]	Jun. 30, 2012 Consumer, excluding credit card Residential Real Estate, Excluding Purchased Credit-Impaired [Member]	Mar. 31, 2013 Consumer, excluding credit card Residential Real Estate, Excluding Purchased Credit-Impaired [Member]	Dec. 31, 2012 Consumer, excluding credit card Residential Real Estate, Excluding Purchased Credit-Impaired [Member]	Mar. 31, 2012 Consumer, excluding credit card Residential Real Estate, Excluding Purchased Credit-Impaired [Member]	Dec. 31, 2011 Consumer, excluding credit card Residential Real Estate, Excluding Purchased Credit-Impaired [Member]	Jun. 30, 2013 Consumer, excluding credit card Residential Real Estate, Excluding Purchased Credit-Impaired [Member] Days Past Due, 60 or More, with Notification of Bankruptcy Filing or Other Event [Member]	Jun. 30, 2013 Consumer, excluding credit card Residential Real Estate, Excluding Purchased Credit-Impaired [Member] Nonaccrual [Member]	Dec. 31, 2012 Consumer, excluding credit card Residential Real Estate, Excluding Purchased Credit-Impaired [Member] Nonaccrual [Member]	Jun. 30, 2013 Consumer, excluding credit card Residential Real Estate, Excluding Purchased Credit-Impaired [Member] Regulatory Guidance Regarding Chapter 7 Loans [Member] Nonaccrual [Member]	Jun. 30, 2013 Consumer, excluding credit card Home Equity - Senior Lien	Jun. 30, 2012 Consumer, excluding credit card Home Equity - Senior Lien	Jun. 30, 2013 Consumer, excluding credit card Home Equity - Senior Lien	Jun. 30, 2012 Consumer, excluding credit card Home Equity - Senior Lien	Mar. 31, 2013 Consumer, excluding credit card Home Equity - Senior Lien	Dec. 31, 2012 Consumer, excluding credit card Home Equity - Senior Lien	Mar. 31, 2012 Consumer, excluding credit card Home Equity - Senior Lien	Dec. 31, 2011 Consumer, excluding credit card Home Equity - Senior Lien	Jun. 30, 2013 Consumer, excluding credit card Home Equity - Senior Lien Nonaccrual [Member]	Dec. 31, 2012 Consumer, excluding credit card Home Equity - Senior Lien Nonaccrual [Member]	Jun. 30, 2013 Consumer, excluding credit card Home Equity - Senior Lien Regulatory Guidance Regarding Chapter 7 Loans [Member] Nonaccrual [Member]	Jun. 30, 2013 Consumer, excluding credit card Home Equity - Junior Lien	Jun. 30, 2012 Consumer, excluding credit card Home Equity - Junior Lien	Jun. 30, 2013 Consumer, excluding credit card Home Equity - Junior Lien	Jun. 30, 2012 Consumer, excluding credit card Home Equity - Junior Lien	Mar. 31, 2013 Consumer, excluding credit card Home Equity - Junior Lien	Dec. 31, 2012 Consumer, excluding credit card Home Equity - Junior Lien	Mar. 31, 2012 Consumer, excluding credit card Home Equity - Junior Lien	Dec. 31, 2011 Consumer, excluding credit card Home Equity - Junior Lien	Jun. 30, 2013 Consumer, excluding credit card Home Equity - Junior Lien Nonaccrual [Member]	Dec. 31, 2012 Consumer, excluding credit card Home Equity - Junior Lien Nonaccrual [Member]	Jun. 30, 2013 Consumer, excluding credit card Home Equity - Junior Lien Regulatory Guidance Regarding Chapter 7 Loans [Member] Nonaccrual [Member]	Jun. 30, 2013 Consumer, excluding credit card Prime Mortgages, Including Option ARMs	Jun. 30, 2012 Consumer, excluding credit card Prime Mortgages, Including Option ARMs	Jun. 30, 2013 Consumer, excluding credit card Prime Mortgages, Including Option ARMs	Jun. 30, 2012 Consumer, excluding credit card Prime Mortgages, Including Option ARMs	Mar. 31, 2013 Consumer, excluding credit card Prime Mortgages, Including Option ARMs	Dec. 31, 2012 Consumer, excluding credit card Prime Mortgages, Including Option ARMs	Mar. 31, 2012 Consumer, excluding credit card Prime Mortgages, Including Option ARMs	Dec. 31, 2011 Consumer, excluding credit card Prime Mortgages, Including Option ARMs	Jun. 30, 2013 Consumer, excluding credit card Prime Mortgages, Including Option ARMs Nonaccrual [Member]	Dec. 31, 2012 Consumer, excluding credit card Prime Mortgages, Including Option ARMs Nonaccrual [Member]	Jun. 30, 2013 Consumer, excluding credit card Prime Mortgages, Including Option ARMs Regulatory Guidance Regarding Prime, including Option ARM, mortgages [Member] Nonaccrual [Member]	Jun. 30, 2013 Consumer, excluding credit card Subprime Mortgages	Jun. 30, 2012 Consumer, excluding credit card Subprime Mortgages	Jun. 30, 2013 Consumer, excluding credit card Subprime Mortgages	Jun. 30, 2012 Consumer, excluding credit card Subprime Mortgages	Mar. 31, 2013 Consumer, excluding credit card Subprime Mortgages	Dec. 31, 2012 Consumer, excluding credit card Subprime Mortgages	Mar. 31, 2012 Consumer, excluding credit card Subprime Mortgages	Dec. 31, 2011 Consumer, excluding credit card Subprime Mortgages	Jun. 30, 2013 Consumer, excluding credit card Subprime Mortgages Nonaccrual [Member]	Dec. 31, 2012 Consumer, excluding credit card Subprime Mortgages Nonaccrual [Member]	Jun. 30, 2013 Consumer, excluding credit card Subprime Mortgages Regulatory Guidance Regarding Chapter 7 Loans [Member] Nonaccrual [Member]	Jun. 30, 2013 Consumer, excluding credit card Other Consumer [Member]	Jun. 30, 2012 Consumer, excluding credit card Other Consumer [Member]	Jun. 30, 2013 Consumer, excluding credit card Other Consumer [Member]	Jun. 30, 2012 Consumer, excluding credit card Other Consumer [Member]	Mar. 31, 2013 Consumer, excluding credit card Other Consumer [Member]	Dec. 31, 2012 Consumer, excluding credit card Other Consumer [Member]	Mar. 31, 2012 Consumer, excluding credit card Other Consumer [Member]	Dec. 31, 2011 Consumer, excluding credit card Other Consumer [Member]	Jun. 30, 2013 Consumer, excluding credit card Other Consumer [Member] Nonaccrual [Member]	Dec. 31, 2012 Consumer, excluding credit card Other Consumer [Member] Nonaccrual [Member]	Jun. 30, 2013 Consumer, excluding credit card Auto Loans	Jun. 30, 2012 Consumer, excluding credit card Auto Loans	Jun. 30, 2013 Consumer, excluding credit card Auto Loans	Jun. 30, 2012 Consumer, excluding credit card Auto Loans	Mar. 31, 2013 Consumer, excluding credit card Auto Loans	Dec. 31, 2012 Consumer, excluding credit card Auto Loans	Mar. 31, 2012 Consumer, excluding credit card Auto Loans	Dec. 31, 2011 Consumer, excluding credit card Auto Loans	Jun. 30, 2013 Consumer, excluding credit card Auto Loans Nonaccrual [Member]	Dec. 31, 2012 Consumer, excluding credit card Auto Loans Nonaccrual [Member]	Jun. 30, 2013 Consumer, excluding credit card Auto Loans Regulatory Guidance Regarding Chapter 7 Loans [Member] Nonaccrual [Member]	Jun. 30, 2013 Consumer, excluding credit card Business Banking Loans	Jun. 30, 2012 Consumer, excluding credit card Business Banking Loans	Jun. 30, 2013 Consumer, excluding credit card Business Banking Loans	Jun. 30, 2012 Consumer, excluding credit card Business Banking Loans	Mar. 31, 2013 Consumer, excluding credit card Business Banking Loans	Dec. 31, 2012 Consumer, excluding credit card Business Banking Loans	Mar. 31, 2012 Consumer, excluding credit card Business Banking Loans	Dec. 31, 2011 Consumer, excluding credit card Business Banking Loans	Jun. 30, 2013 Consumer, excluding credit card Business Banking Loans Nonaccrual [Member]	Dec. 31, 2012 Consumer, excluding credit card Business Banking Loans Nonaccrual [Member]	Jun. 30, 2013 Credit card	Dec. 31, 2012 Credit card	Jun. 30, 2012 Credit card	Jun. 30, 2013 Credit card Credit Card Loan	Jun. 30, 2012 Credit card Credit Card Loan	Jun. 30, 2013 Credit card Credit Card Loan	Jun. 30, 2012 Credit card Credit Card Loan	Dec. 31, 2012 Credit card Credit Card Loan	Jun. 30, 2013 Credit card Credit Card Loan Completion of Short Term Modification [Member]	Dec. 31, 2012 Credit card Credit Card Loan Completion of Short Term Modification [Member]	Jun. 30, 2013 Credit card Credit Card Loan Noncompliance With Modified Terms [Member]	Dec. 31, 2012 Credit card Credit Card Loan Noncompliance With Modified Terms [Member]	Jun. 30, 2013 Credit card Credit Card Loan Nonaccrual [Member]	Dec. 31, 2012 Credit card Credit Card Loan Nonaccrual [Member]	Jun. 30, 2013 Wholesale	Dec. 31, 2012 Wholesale	Jun. 30, 2012 Wholesale	Jun. 30, 2013 Wholesale Wholesale Loan [Member]	Jun. 30, 2012 Wholesale Wholesale Loan [Member]	Jun. 30, 2013 Wholesale Wholesale Loan [Member]	Jun. 30, 2012 Wholesale Wholesale Loan [Member]	Mar. 31, 2013 Wholesale Wholesale Loan [Member]	Dec. 31, 2012 Wholesale Wholesale Loan [Member]	Mar. 31, 2012 Wholesale Wholesale Loan [Member]	Dec. 31, 2011 Wholesale Wholesale Loan [Member]	Jun. 30, 2013 Wholesale Wholesale Loan [Member] Nonaccrual [Member]	Dec. 31, 2012 Wholesale Wholesale Loan [Member] Nonaccrual [Member]	Jun. 30, 2012 Wholesale Wholesale Loan [Member] Nonaccrual [Member]	Jun. 30, 2013 Wholesale Commercial and Industrial [Member]	Jun. 30, 2012 Wholesale Commercial and Industrial [Member]	Jun. 30, 2013 Wholesale Commercial and Industrial [Member]	Jun. 30, 2012 Wholesale Commercial and Industrial [Member]	Mar. 31, 2013 Wholesale Commercial and Industrial [Member]	Dec. 31, 2012 Wholesale Commercial and Industrial [Member]	Mar. 31, 2012 Wholesale Commercial and Industrial [Member]	Dec. 31, 2011 Wholesale Commercial and Industrial [Member]	Jun. 30, 2013 Wholesale Commercial and Industrial [Member] Nonaccrual [Member]	Dec. 31, 2012 Wholesale Commercial and Industrial [Member] Nonaccrual [Member]	Jun. 30, 2012 Wholesale Commercial and Industrial [Member] Nonaccrual [Member]	Jun. 30, 2013 Wholesale Wholesale Real Estate [Member]	Jun. 30, 2012 Wholesale Wholesale Real Estate [Member]	Jun. 30, 2013 Wholesale Wholesale Real Estate [Member]	Jun. 30, 2012 Wholesale Wholesale Real Estate [Member]	Mar. 31, 2013 Wholesale Wholesale Real Estate [Member]	Dec. 31, 2012 Wholesale Wholesale Real Estate [Member]	Mar. 31, 2012 Wholesale Wholesale Real Estate [Member]	Dec. 31, 2011 Wholesale Wholesale Real Estate [Member]	Jun. 30, 2013 Wholesale Wholesale Real Estate [Member] Nonaccrual [Member]	Dec. 31, 2012 Wholesale Wholesale Real Estate [Member] Nonaccrual [Member]	Jun. 30, 2012 Wholesale Wholesale Real Estate [Member] Nonaccrual [Member]	Jun. 30, 2013 Wholesale Financial Institutions, Government Agencies and Other Wholesale [Member]	Mar. 31, 2013 Wholesale Financial Institutions, Government Agencies and Other Wholesale [Member]	Dec. 31, 2012 Wholesale Financial Institutions, Government Agencies and Other Wholesale [Member]	Jun. 30, 2012 Wholesale Financial Institutions, Government Agencies and Other Wholesale [Member]	Mar. 31, 2012 Wholesale Financial Institutions, Government Agencies and Other Wholesale [Member]	Dec. 31, 2011 Wholesale Financial Institutions, Government Agencies and Other Wholesale [Member]	Jun. 30, 2013 Wholesale Financial Institutions, Government Agencies and Other Wholesale [Member] Nonaccrual [Member]	Jun. 30, 2012 Wholesale Financial Institutions, Government Agencies and Other Wholesale [Member] Nonaccrual [Member]	Jun. 30, 2013 Wholesale Financial Institutions [Member]	Jun. 30, 2012 Wholesale Financial Institutions [Member]	Jun. 30, 2013 Wholesale Financial Institutions [Member]	Jun. 30, 2012 Wholesale Financial Institutions [Member]	Dec. 31, 2012 Wholesale Financial Institutions [Member]	Jun. 30, 2013 Wholesale Financial Institutions [Member] Nonaccrual [Member]	Dec. 31, 2012 Wholesale Financial Institutions [Member] Nonaccrual [Member]	Jun. 30, 2013 Wholesale Government Agencies [Member]	Jun. 30, 2012 Wholesale Government Agencies [Member]	Jun. 30, 2013 Wholesale Government Agencies [Member]	Jun. 30, 2012 Wholesale Government Agencies [Member]	Dec. 31, 2012 Wholesale Government Agencies [Member]	Jun. 30, 2013 Wholesale Government Agencies [Member] Nonaccrual [Member]	Dec. 31, 2012 Wholesale Government Agencies [Member] Nonaccrual [Member]	Jun. 30, 2013 Wholesale Wholesale Other [Member]	Jun. 30, 2012 Wholesale Wholesale Other [Member]	Jun. 30, 2013 Wholesale Wholesale Other [Member]	Jun. 30, 2012 Wholesale Wholesale Other [Member]	Dec. 31, 2012 Wholesale Wholesale Other [Member]	Jun. 30, 2013 Wholesale Wholesale Other [Member] Nonaccrual [Member]	Dec. 31, 2012 Wholesale Wholesale Other [Member] Nonaccrual [Member]	Jun. 30, 2013 Minimum Consumer, excluding credit card loan_payment	Jun. 30, 2013 Minimum Consumer, excluding credit card Residential Real Estate, Excluding Purchased Credit-Impaired [Member] Regulatory Guidance Regarding Chapter 7 Loans [Member]
Financing Receivable, Impaired [Line Items]
Number of Payments Under Modified Terms to Recognize Interest on Cash Basis																																																																																																																																																																															6
Rate of Default for Modified Loans, Estimated Weighted Average																																		18.00%																																																																			33.54%		38.23%																																																																									10.00%
Impaired Financing Receivable, Recorded Investment [Abstract]
Impaired Financing Receivable, with Related Allowance, Recorded Investment									$ 10,550,000,000		$ 10,550,000,000			$ 10,100,000,000							$ 582,000,000		$ 582,000,000			$ 542,000,000						$ 717,000,000		$ 717,000,000			$ 677,000,000						$ 6,152,000,000		$ 6,152,000,000			$ 5,810,000,000						$ 3,099,000,000		$ 3,099,000,000			$ 3,071,000,000						$ 591,000,000		$ 591,000,000			$ 621,000,000					$ 67,000,000		$ 67,000,000			$ 78,000,000						$ 524,000,000		$ 524,000,000			$ 543,000,000																						$ 811,000,000		$ 811,000,000			$ 1,091,000,000						$ 285,000,000		$ 285,000,000			$ 588,000,000						$ 334,000,000		$ 334,000,000			$ 375,000,000														$ 13,000,000		$ 13,000,000		$ 6,000,000			$ 0		$ 0		$ 0			$ 179,000,000		$ 179,000,000		$ 122,000,000
Impaired Financing Receivable, with No Related Allowance, Recorded Investment									3,053,000,000		3,053,000,000			3,145,000,000							578,000,000		578,000,000			550,000,000						598,000,000		598,000,000			546,000,000						1,151,000,000		1,151,000,000			1,308,000,000						726,000,000		726,000,000			741,000,000						57,000,000		57,000,000			72,000,000					57,000,000		57,000,000			72,000,000						0		0			0																						221,000,000		221,000,000			384,000,000						44,000,000		44,000,000			173,000,000						133,000,000		133,000,000			133,000,000														2,000,000		2,000,000		2,000,000			0		0		0			42,000,000		42,000,000		76,000,000
Financing Receivable, Modifications, Recorded Investment									13,603,000,000	10,898,000,000	13,603,000,000	10,898,000,000	13,507,000,000	13,245,000,000	9,288,000,000	9,088,000,000				1,600,000,000	1,160,000,000	560,000,000	1,160,000,000	560,000,000	1,155,000,000	1,092,000,000	338,000,000	335,000,000			470,000,000	1,315,000,000	762,000,000	1,315,000,000	762,000,000	1,286,000,000	1,223,000,000	706,000,000	657,000,000			499,000,000	7,303,000,000	6,092,000,000	7,303,000,000	6,092,000,000	7,223,000,000	7,118,000,000	5,018,000,000	4,877,000,000			430,000,000	3,825,000,000	3,484,000,000	3,825,000,000	3,484,000,000	3,843,000,000	3,812,000,000	3,226,000,000	3,219,000,000			223,000,000	448,000,000	452,000,000	448,000,000	452,000,000	481,000,000	502,000,000	469,000,000	503,000,000	263,000,000	312,000,000	124,000,000	86,000,000	124,000,000	86,000,000	140,000,000	150,000,000	91,000,000	88,000,000	90,000,000	109,000,000	57,000,000	324,000,000	366,000,000	324,000,000	366,000,000	341,000,000	352,000,000	378,000,000	415,000,000	173,000,000	203,000,000				3,407,000,000		3,407,000,000		4,189,000,000										254,000,000	615,000,000	254,000,000	615,000,000	421,000,000	696,000,000	664,000,000	750,000,000	211,000,000		458,000,000	109,000,000	464,000,000	109,000,000	464,000,000	254,000,000	575,000,000	419,000,000	531,000,000	102,000,000		341,000,000	111,000,000	121,000,000	111,000,000	121,000,000	124,000,000	99,000,000	148,000,000	176,000,000	82,000,000		88,000,000	34,000,000	43,000,000	22,000,000	30,000,000	97,000,000	43,000,000	27,000,000	29,000,000
Loans and Leases Receivable, Impaired, Reverted to Original Payment Terms Amount																																																																																																			450,000,000		450,000,000		573,000,000	186,000,000	232,000,000	264,000,000	341,000,000
Impaired Financing Receivable, Recorded Investment									13,603,000,000		13,603,000,000			13,245,000,000				4,657,000,000	4,402,000,000		1,160,000,000		1,160,000,000			1,092,000,000			648,000,000	607,000,000		1,315,000,000		1,315,000,000			1,223,000,000			683,000,000	599,000,000		7,303,000,000		7,303,000,000			7,118,000,000			2,084,000,000	1,888,000,000		3,825,000,000		3,825,000,000			3,812,000,000			1,242,000,000	1,308,000,000		648,000,000		648,000,000			693,000,000			463,000,000	503,000,000	124,000,000		124,000,000			150,000,000			90,000,000	109,000,000		524,000,000		524,000,000			543,000,000			373,000,000	394,000,000				3,857,000,000		3,857,000,000		4,762,000,000										1,032,000,000		1,032,000,000			1,475,000,000						329,000,000		329,000,000			761,000,000						467,000,000		467,000,000			508,000,000														15,000,000		15,000,000		8,000,000			0		0		0			221,000,000		221,000,000		198,000,000
Impaired Financing Receivable, Related Allowance									576,000,000		576,000,000			591,000,000							119,000,000		119,000,000			159,000,000						163,000,000		163,000,000			188,000,000						177,000,000		177,000,000			70,000,000						117,000,000		117,000,000			174,000,000						137,000,000		137,000,000			138,000,000					12,000,000		12,000,000			12,000,000						125,000,000		125,000,000			126,000,000								1,227,000,000		1,227,000,000		1,681,000,000										228,000,000		228,000,000			319,000,000						104,000,000		104,000,000			205,000,000						74,000,000		74,000,000			82,000,000														10,000,000		10,000,000		2,000,000			0		0		0			40,000,000		40,000,000		30,000,000
Modified Loans Repurchased From U S Government Agencies Excluded From Troubled Debt Restructurings				6,900,000,000	7,500,000,000
Loans and Leases Receivable, Impaired, Troubled Debt Restructurings Not Having Yet Made Six Payments									3,200,000,000		3,200,000,000			2,900,000,000
Period Past Due, Credit Analysis Factors, Charge off Criteria																	90 days																	180 days
Loans Receivable Held for Investment, Net of Deferred Income	719,884,000,000	726,835,000,000	723,527,000,000	287,388,000,000	292,620,000,000	300,046,000,000	287,388,000,000	292,620,000,000	149,208,000,000		149,208,000,000			151,896,000,000				7,910,000,000	8,460,000,000		18,277,000,000		18,277,000,000			19,385,000,000			927,000,000	931,000,000		44,049,000,000		44,049,000,000			48,000,000,000			2,059,000,000	2,277,000,000		79,179,000,000		79,179,000,000			76,256,000,000			3,330,000,000	3,445,000,000		7,703,000,000		7,703,000,000			8,255,000,000			1,594,000,000	1,807,000,000		81,444,000,000		81,444,000,000			80,987,000,000			666,000,000	714,000,000	50,865,000,000		50,865,000,000			49,913,000,000			126,000,000	163,000,000		18,730,000,000		18,730,000,000			18,883,000,000			454,000,000	481,000,000	124,288,000,000	127,993,000,000	124,593,000,000	124,288,000,000		124,288,000,000		127,993,000,000					1,000,000	1,000,000	308,208,000,000	306,222,000,000	298,888,000,000	308,208,000,000		308,208,000,000			306,222,000,000			1,001,000,000	1,434,000,000		110,360,000,000		110,360,000,000			109,865,000,000			321,000,000	708,000,000		63,836,000,000		63,836,000,000			60,740,000,000			451,000,000	520,000,000										39,708,000,000		39,708,000,000		36,227,000,000	15,000,000	8,000,000	8,694,000,000		8,694,000,000		9,544,000,000	0	0	85,610,000,000		85,610,000,000		89,846,000,000	214,000,000	198,000,000
Impaired Financing Receivable, Unpaid Principal Balance [Abstract]
Impaired Financing Receivable, Unpaid Principal Balance									19,238,000,000		19,238,000,000			18,555,000,000							1,532,000,000		1,532,000,000			1,408,000,000						2,584,000,000		2,584,000,000			2,352,000,000						9,374,000,000		9,374,000,000			9,095,000,000						5,748,000,000		5,748,000,000			5,700,000,000						835,000,000		835,000,000			883,000,000					225,000,000		225,000,000			259,000,000						610,000,000		610,000,000			624,000,000																						1,427,000,000		1,427,000,000			1,923,000,000						445,000,000		445,000,000			957,000,000						670,000,000		670,000,000			626,000,000														15,000,000		15,000,000		22,000,000			0		0		0			297,000,000		297,000,000		318,000,000
Impaired Financing Receivable, Average Recorded Investment [Abstract]
Impaired Financing Receivable, Average Recorded Investment									13,506,000,000	9,987,000,000	13,466,000,000	9,587,000,000									1,158,000,000	390,000,000	1,149,000,000	363,000,000								1,296,000,000	734,000,000	1,284,000,000	710,000,000								7,219,000,000	5,469,000,000	7,203,000,000	5,209,000,000								3,833,000,000	3,394,000,000	3,830,000,000	3,305,000,000								657,000,000	734,000,000	673,000,000	757,000,000							129,000,000	88,000,000	137,000,000	90,000,000								528,000,000	646,000,000	536,000,000	667,000,000										4,070,000,000	6,196,000,000	4,294,000,000	6,520,000,000											1,142,000,000	2,073,000,000	1,256,000,000	2,155,000,000								387,000,000	892,000,000	496,000,000	905,000,000								518,000,000	850,000,000	526,000,000	865,000,000																11,000,000	20,000,000	9,000,000	24,000,000				0	12,000,000	0	14,000,000				226,000,000	299,000,000	225,000,000	347,000,000
Impaired Financing Receivable, Interest Income, Accrual Method [Abstract]
Impaired Financing Receivable, Interest Income, Accrual Method									155,000,000	110,000,000	309,000,000	210,000,000									14,000,000	3,000,000	29,000,000	6,000,000								21,000,000	7,000,000	41,000,000	13,000,000								70,000,000	55,000,000	139,000,000	104,000,000								50,000,000	45,000,000	100,000,000	87,000,000																																										52,000,000	80,000,000	110,000,000	169,000,000
Impaired Financing Receivable, Interest Income, Cash Basis Method [Abstract]
Impaired Financing Receivable, Interest Income, Cash Basis Method									$ 53,000,000	$ 12,000,000	$ 105,000,000	$ 23,000,000									$ 10,000,000	$ 0	$ 20,000,000	$ 1,000,000								$ 14,000,000	$ 1,000,000	$ 27,000,000	$ 2,000,000								$ 15,000,000	$ 5,000,000	$ 29,000,000	$ 10,000,000								$ 14,000,000	$ 6,000,000	$ 29,000,000	$ 10,000,000