Financing Receivables (Schedule of Financing Receivable, Allowance for Credit Losses) (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014 loan	Jun. 30, 2013 loan	Jun. 30, 2014 loan	Jun. 30, 2013 loan	Dec. 31, 2013
Financing Receivable Allowance for Credit Losses
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	$ 17,000,000		$ 17,000,000		$ 21,000,000
Financing Receivable, Modifications, Number of Contracts	2	9	7	14
Financing Receivable, Modifications, Post-Modification Recorded Investment		10,000,000	9,000,000	10,000,000
Loans and Leases Receivable, Impaired, Commitment to Lend	0		0
Rollforward of the allowance for loan losses
Allowance for loan losses, balance at the beginning of the period			37,000,000	44,000,000
Charge-offs			(4,000,000)	(2,000,000)
Allowance for loan losses, balance at the end of the period	33,000,000	42,000,000	33,000,000	42,000,000
Individually evaluated for impairment	9,000,000	9,000,000	9,000,000	9,000,000
Collectively evaluated for impairment	24,000,000	33,000,000	24,000,000	33,000,000
Individually evaluated for impairment	48,000,000		48,000,000		58,000,000
Collectively evaluated for impairment	3,883,000,000		3,883,000,000		3,883,000,000
Financing receivables	3,931,000,000		3,931,000,000		3,941,000,000
Nonperforming loans	12,000,000		12,000,000		22,000,000
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable Allowance for Credit Losses
Financing Receivable, Modifications, Number of Contracts	0	4	2	4
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	10,000,000	8,000,000	10,000,000
Rollforward of the allowance for loan losses
Allowance for loan losses, balance at the beginning of the period			26,000,000	29,000,000
Charge-offs			(1,000,000)
Allowance for loan losses, balance at the end of the period	25,000,000	29,000,000	25,000,000	29,000,000
Individually evaluated for impairment	8,000,000	8,000,000	8,000,000	8,000,000
Collectively evaluated for impairment	17,000,000	21,000,000	17,000,000	21,000,000
Individually evaluated for impairment	36,000,000		36,000,000		42,000,000
Collectively evaluated for impairment	2,669,000,000		2,669,000,000		2,640,000,000
Financing receivables	2,705,000,000		2,705,000,000		2,682,000,000
Syndicated loans
Financing Receivable Allowance for Credit Losses
Financing Receivable, Modifications, Number of Contracts	0	1	1	1
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	1,000,000	0
Rollforward of the allowance for loan losses
Allowance for loan losses, balance at the beginning of the period			6,000,000	7,000,000
Charge-offs			(2,000,000)	(1,000,000)
Allowance for loan losses, balance at the end of the period	4,000,000	6,000,000	4,000,000	6,000,000
Individually evaluated for impairment	0	0	0	0
Collectively evaluated for impairment	4,000,000	6,000,000	4,000,000	6,000,000
Individually evaluated for impairment	5,000,000		5,000,000		9,000,000
Collectively evaluated for impairment	407,000,000		407,000,000		370,000,000
Financing receivables	412,000,000		412,000,000		379,000,000
Loans purchased	25,000,000	37,000,000	90,000,000	59,000,000
Loans sold	6,000,000	1,000,000	10,000,000	2,000,000
Residential and Consumer Portfolio Segment [Member]
Financing Receivable Allowance for Credit Losses
Financing Receivable, Modifications, Number of Contracts	2	4	4	9
Financing Receivable, Modifications, Post-Modification Recorded Investment	0	0	0	0
Rollforward of the allowance for loan losses
Allowance for loan losses, balance at the beginning of the period			5,000,000	8,000,000
Charge-offs			(1,000,000)	(1,000,000)
Allowance for loan losses, balance at the end of the period	4,000,000	7,000,000	4,000,000	7,000,000
Individually evaluated for impairment	1,000,000	1,000,000	1,000,000	1,000,000
Collectively evaluated for impairment	3,000,000	6,000,000	3,000,000	6,000,000
Individually evaluated for impairment	7,000,000		7,000,000		7,000,000
Collectively evaluated for impairment	807,000,000		807,000,000		873,000,000
Financing receivables	814,000,000		814,000,000		880,000,000
Percentage of residential mortgage loans and credit cards and other consumer loans	5.00%		5.00%		5.00%
Percentage of residential mortgage loans with Loan-To-Value ratios	2.00%		2.00%		2.00%
FICO score	640		640		640
Specified LTV ratios	90.00%		90.00%		90.00%
Percentage of total loan portfolio represented by state of California	37.00%		37.00%		38.00%
Nonperforming syndicated loans
Rollforward of the allowance for loan losses
Nonperforming loans	$ 5,000,000		$ 5,000,000		$ 4,000,000