Loans - Consumer, Excluding Credit Card Loans, Loan Modifications, Nature and Extent of Modifications (Details) (Consumer, excluding credit card [Member])	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Residential Real Estate, Excluding Purchased Credit-Impaired [Member]
Financing Receivable, Impaired [Line Items]
Concession granted - Interest rate reduction	77.00%	77.00%	75.00%
Concession granted - Term of payment extension	70.00%	55.00%	75.00%
Concession granted - Principal and/or interest deferred	21.00%	12.00%	19.00%
Concession granted - principal forgiveness	39.00%	29.00%	11.00%
Concession granted - other	11.00%	11.00%	35.00%
Percentage, sum of items by type, may exceed	100.00%
Home equity - senior lien [Member]
Financing Receivable, Impaired [Line Items]
Concession granted - Interest rate reduction	70.00%	83.00%	80.00%
Concession granted - Term of payment extension	76.00%	47.00%	88.00%
Concession granted - Principal and/or interest deferred	12.00%	6.00%	10.00%
Concession granted - principal forgiveness	38.00%	11.00%	7.00%
Concession granted - other	0.00%	0.00%	29.00%
Home equity - junior lien [Member]
Financing Receivable, Impaired [Line Items]
Concession granted - Interest rate reduction	88.00%	88.00%	95.00%
Concession granted - Term of payment extension	80.00%	76.00%	81.00%
Concession granted - Principal and/or interest deferred	24.00%	17.00%	21.00%
Concession granted - principal forgiveness	32.00%	23.00%	20.00%
Concession granted - other	0.00%	0.00%	7.00%
Prime, including option ARMS [Member]
Financing Receivable, Impaired [Line Items]
Concession granted - Interest rate reduction	73.00%	74.00%	53.00%
Concession granted - Term of payment extension	73.00%	57.00%	71.00%
Concession granted - Principal and/or interest deferred	30.00%	16.00%	17.00%
Concession granted - principal forgiveness	38.00%	29.00%	2.00%
Concession granted - other	23.00%	29.00%	68.00%
Subprime mortgage [Member]
Financing Receivable, Impaired [Line Items]
Concession granted - Interest rate reduction	72.00%	69.00%	80.00%
Concession granted - Term of payment extension	56.00%	41.00%	72.00%
Concession granted - Principal and/or interest deferred	13.00%	7.00%	19.00%
Concession granted - principal forgiveness	48.00%	42.00%	13.00%
Concession granted - other	14.00%	8.00%	26.00%
Regulatory Guidance Regarding Chapter 7 Loans [Member] | Residential Real Estate, Excluding Purchased Credit-Impaired [Member]
Financing Receivable, Impaired [Line Items]
Number of loans	36,700
Regulatory Guidance Regarding Chapter 7 Loans [Member] | Home equity - senior lien [Member]
Financing Receivable, Impaired [Line Items]
Number of loans	8,800
Regulatory Guidance Regarding Chapter 7 Loans [Member] | Home equity - junior lien [Member]
Financing Receivable, Impaired [Line Items]
Number of loans	21,700
Regulatory Guidance Regarding Chapter 7 Loans [Member] | Prime, including option ARMS [Member]
Financing Receivable, Impaired [Line Items]
Number of loans	3,100
Regulatory Guidance Regarding Chapter 7 Loans [Member] | Subprime mortgage [Member]
Financing Receivable, Impaired [Line Items]
Number of loans	3,100
Trial Modification [Member] | Residential Real Estate, Excluding Purchased Credit-Impaired [Member]
Financing Receivable, Impaired [Line Items]
Number of contract modifications	9,682	11,349	13,649
Trial Modification [Member] | Home equity - senior lien [Member]
Financing Receivable, Impaired [Line Items]
Number of contract modifications	1,719	1,695	1,219
Trial Modification [Member] | Home equity - junior lien [Member]
Financing Receivable, Impaired [Line Items]
Number of contract modifications	884	918	1,308
Trial Modification [Member] | Prime, including option ARMS [Member]
Financing Receivable, Impaired [Line Items]
Number of contract modifications	2,846	3,895	4,676
Trial Modification [Member] | Subprime mortgage [Member]
Financing Receivable, Impaired [Line Items]
Number of contract modifications	4,233	4,841	6,446
Permanent Modification [Member] | Residential Real Estate, Excluding Purchased Credit-Impaired [Member]
Financing Receivable, Impaired [Line Items]
Number of contract modifications	16,525	30,822	24,699
Permanent Modification [Member] | Home equity - senior lien [Member]
Financing Receivable, Impaired [Line Items]
Number of contract modifications	1,765	4,385	1,006
Permanent Modification [Member] | Home equity - junior lien [Member]
Financing Receivable, Impaired [Line Items]
Number of contract modifications	5,040	7,430	9,142
Permanent Modification [Member] | Prime, including option ARMS [Member]
Financing Receivable, Impaired [Line Items]
Number of contract modifications	4,356	9,043	9,579
Permanent Modification [Member] | Subprime mortgage [Member]
Financing Receivable, Impaired [Line Items]
Number of contract modifications	5,364	9,964	4,972