Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2013

Employee Benefit Plans [Abstract]

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	2013		2012
Dividend yield	1.28	%	0.92	%
Expected stock price volatility	30.98		40.41
Risk-free interest rate (weighted average)	1.02		1.07
Expected life of options	6 years		6 years

Stock-Based Compensation Expense Recognized in Noninterest Expense

(Dollars in millions)	2013		2012
Stock-based compensation expense:
Stock options		$3		$4
Restricted stock	7		7
RSUs	9		14
Total stock-based compensation expense		$19		$25

Schedule of Net Benefit Costs [Table Text Block]

	2013						2012
(Dollars in millions)	Pension Benefits			Other Postretirement Benefits			Pension Benefits			Other Postretirement Benefits
Interest cost		$28			$1			$29			$2
Expected return on plan assets	(46		)	(1		)	(43		)	(2		)
Recognized net actuarial loss	6			—			6			—
Net periodic benefit		($12	)		$—			($8	)		$—