Share-based Compensation Plans (Details) (USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended		3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2014	Apr. 10, 2014	Jun. 30, 2014 Restricted Stock Units (RSUs) [Member]	Jun. 30, 2014 Restricted Stock Units (RSUs) [Member]	Jun. 30, 2014 Deferred Stock Unit [Member]	Jun. 30, 2014 Deferred Stock Unit [Member]	Jun. 30, 2014 Incentive Restricted Stock Unit [Member]	Jun. 30, 2014 Incentive Restricted Stock Unit [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation			$ 11	$ 26	$ (3)	$ 16	$ (2)	$ (3)
Share Price	$ 23.91	$ 23.98
Adjustments to Additional Paid in Capital, Share-based Compensation, Restricted Stock Unit or Restricted Stock Award, Requisite Service Period Recognition	$ 62
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized			4,200,000	4,200,000	3,500,000	3,500,000	700,000	700,000
Pecent of TARP obligation that must be paid to receive 25% IRSU compensation	25.00%
TARP Repayment	75.00%