Loans - Status of Consumer Loan Portfolio (Detail) (USD $)	Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Recorded Investment [Line Items]
Nonaccrual Loans	$ 1,305,000,000		$ 1,629,000,000
Accruing Loans Contractually Past Due 90 days or More	44,000,000		80,000,000
Total loans	67,695,000,000		63,258,000,000	51,867,000,000
Consumer Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Performing Loans	18,137,000,000		17,936,000,000
Nonaccrual Loans	1,026,000,000		1,129,000,000
Accruing Loans Contractually Past Due 90 days or More	38,000,000		43,000,000
Total loans	19,201,000,000		19,108,000,000
Consumer Loans [Member] | Total residential mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Performing Loans	16,811,000,000		16,571,000,000
Nonaccrual Loans	1,026,000,000	[1]	1,124,000,000
Accruing Loans Contractually Past Due 90 days or More	0		0
Total loans	17,837,000,000		17,695,000,000
Consumer Loans [Member] | Residential Mortgage [Member]
Financing Receivable, Recorded Investment [Line Items]
Performing Loans	14,877,000,000		14,333,000,000
Nonaccrual Loans	949,000,000		1,038,000,000
Accruing Loans Contractually Past Due 90 days or More	0		0
Total loans	15,826,000,000	[2]	15,371,000,000	14,113,000,000
Consumer Loans [Member] | Home Equity Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Performing Loans	1,934,000,000		2,238,000,000
Nonaccrual Loans	77,000,000		86,000,000
Accruing Loans Contractually Past Due 90 days or More	0		0
Total loans	2,011,000,000		2,324,000,000	2,563,000,000
Consumer Loans [Member] | Credit Cards [Member]
Financing Receivable, Recorded Investment [Line Items]
Performing Loans	840,000,000		800,000,000
Nonaccrual Loans	0		0
Accruing Loans Contractually Past Due 90 days or More	14,000,000		15,000,000
Total loans	854,000,000	[3]	815,000,000	828,000,000
Consumer Loans [Member] | Other consumer
Financing Receivable, Recorded Investment [Line Items]
Performing Loans	486,000,000		565,000,000
Nonaccrual Loans	0		5,000,000
Accruing Loans Contractually Past Due 90 days or More	24,000,000		28,000,000
Total loans	$ 510,000,000		$ 598,000,000	$ 714,000,000

[1] Nonaccrual residential mortgages includes all receivables which are 90 or more days contractually delinquent as well as loans discharged under Chapter 7 bankruptcy and not re-affirmed and second lien loans where the first lien loan that we own or service is 90 or more days contractually delinquent.

[2] Home equity mortgages maturities reflect estimates based on historical payment patterns.

[3] As credit card receivables do not have stated maturities, the table reflects estimates based on historical payment patterns.