Employee Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2012

Employee Benefit Plans [Abstract]

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

	Three Months Ended March 31
	2012		2011
Dividend yield	0.92	%	0.12	%
Expected stock price volatility	40.41		34.54
Risk-free interest rate (weighted average)	1.07		2.72
Expected life of options	6 years		6 years

Stock-Based Compensation Expense Recognized in Noninterest Expense

	Three Months Ended March 31
(Dollars in millions)	2012		2011
Stock-based compensation expense:
Stock options		$4		$3
Restricted stock	7		9
Restricted stock units	14		—
Total stock-based compensation expense		$25		$12

Schedule of Net Benefit Costs [Table Text Block]

	Three Months Ended March 31
	2012						2011
(Dollars in millions)	Retirement Benefits			Other Postretirement Benefits			Retirement Benefits			Other Postretirement Benefits
Service cost		$—			$—			$18			$—
Interest cost	29			2			32			3
Expected return on plan assets	(43		)	(2		)	(47		)	(2		)
Amortization of prior service credit	—			—			(5		)	—
Recognized net actuarial loss	6			—			10			—
Net periodic (benefit)/cost		($8	)		$—			$8			$1