Credit Quality And Allowance For Credit Losses (Individually Evaluated Impaired Loans) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	$ 62		$ 53
Recorded investment in impaired loans with related allowance	212		366
Recorded investment total impaired loans	274		419
Unpaid principal balance	415		638
Related allowance for loan losses	57		76
Business loans
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	11		2
Recorded investment in impaired loans with related allowance	212		366
Recorded investment total impaired loans	223		368
Unpaid principal balance	344		570
Related allowance for loan losses	57		76
Business loans | Commercial
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	10		2
Recorded investment in impaired loans with related allowance	64		117
Recorded investment total impaired loans	74		119
Unpaid principal balance	121		207
Related allowance for loan losses	26		26
Business loans | Real estate construction
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	0		0
Recorded investment in impaired loans with related allowance	21		26
Recorded investment total impaired loans	21		26
Unpaid principal balance	25		32
Related allowance for loan losses	3		4
Business loans | Real estate construction | Commercial Real Estate business line
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	0	[1]	0	[1]
Recorded investment in impaired loans with related allowance	20	[1]	26	[1]
Recorded investment total impaired loans	20	[1]	26	[1]
Unpaid principal balance	24	[1]	31	[1]
Related allowance for loan losses	3	[1]	4	[1]
Business loans | Real estate construction | Other business lines
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	0	[2]	0	[2]
Recorded investment in impaired loans with related allowance	1	[2]	0	[2]
Recorded investment total impaired loans	1	[2]	0	[2]
Unpaid principal balance	1	[2]	1	[2]
Related allowance for loan losses	0	[2]	0	[2]
Business loans | Commercial mortgage
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	1		0
Recorded investment in impaired loans with related allowance	123		221
Recorded investment total impaired loans	124		221
Unpaid principal balance	194		326
Related allowance for loan losses	27		46
Business loans | Commercial mortgage | Commercial Real Estate business line
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	0	[1]	0	[1]
Recorded investment in impaired loans with related allowance	60	[1]	99	[1]
Recorded investment total impaired loans	60	[1]	99	[1]
Unpaid principal balance	104	[1]	159	[1]
Related allowance for loan losses	12	[1]	18	[1]
Business loans | Commercial mortgage | Other business lines
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	1	[2]	0	[2]
Recorded investment in impaired loans with related allowance	63	[2]	122	[2]
Recorded investment total impaired loans	64	[2]	122	[2]
Unpaid principal balance	90	[2]	167	[2]
Related allowance for loan losses	15	[2]	28	[2]
Business loans | Lease financing
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance			0
Recorded investment in impaired loans with related allowance			2
Recorded investment total impaired loans			2
Unpaid principal balance			5
Related allowance for loan losses			0
Business loans | International
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	0
Recorded investment in impaired loans with related allowance	4
Recorded investment total impaired loans	4
Unpaid principal balance	4
Related allowance for loan losses	1
Retail loans
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	51	[3]	51	[3]
Recorded investment in impaired loans with related allowance	0	[3]	0	[3]
Recorded investment total impaired loans	51	[3]	51	[3]
Unpaid principal balance	71	[3]	68	[3]
Related allowance for loan losses	0	[3]	0	[3]
Retail loans | Residential mortgage
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	35		39
Recorded investment in impaired loans with related allowance	0		0
Recorded investment total impaired loans	35		39
Unpaid principal balance	42		48
Related allowance for loan losses	0		0
Retail loans | Consumer
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	16		12
Recorded investment in impaired loans with related allowance	0		0
Recorded investment total impaired loans	16		12
Unpaid principal balance	29		20
Related allowance for loan losses	0		0
Retail loans | Consumer | Home equity
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	12		8
Recorded investment in impaired loans with related allowance	0		0
Recorded investment total impaired loans	12		8
Unpaid principal balance	17		10
Related allowance for loan losses	0		0
Retail loans | Consumer | Other consumer
Financing Receivable, Impaired [Line Items]
Recorded investment in impaired loans with no related allowance	4		4
Recorded investment in impaired loans with related allowance	0		0
Recorded investment total impaired loans	4		4
Unpaid principal balance	12		10
Related allowance for loan losses	$ 0		$ 0

[1] Primarily loans to real estate developers.

[2] Primarily loans secured by owner-occupied real estate.

[3] Individually evaluated retail loans had no related allowance for loan losses, primarily due to policy changes which result in direct write-downs of restructured retail loans.