Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2012

Employee Benefit Plans [Abstract]

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

	Six Months Ended June 30
	2012		2011
Dividend yield	0.91	%	0.67	%
Expected stock price volatility	39.88		34.73
Risk-free interest rate (weighted average)	1.07		2.61
Expected life of options	6 years		6 years

Stock-Based Compensation Expense Recognized in Noninterest Expense

	Three Months Ended June 30				Six Months Ended June 30
(Dollars in millions)	2012		2011		2012		2011
Stock-based compensation expense:
Stock options		$2		$5		$6		$8
Restricted stock	8		8		15		17
RSUs	4		8		18		8
Total stock-based compensation expense		$14		$21		$39		$33

Schedule of Net Benefit Costs [Table Text Block]

	Three Months Ended June 30
	2012						2011
(Dollars in millions)	Retirement Benefits			Other Postretirement Benefits			Retirement Benefits			Other Postretirement Benefits
Service cost		$—			$—			$17			$—
Interest cost	31			1			32			2
Expected return on plan assets	(43		)	(1		)	(47		)	(2		)
Amortization of prior service credit	—			—			(4		)	—
Recognized net actuarial loss	6			—			11			—
Net periodic (benefit)/cost		($6	)		$—			$9			$—

	Six Months Ended June 30
	2012						2011
(Dollars in millions)	Retirement Benefits			Other Postretirement Benefits			Retirement Benefits			Other Postretirement Benefits
Service cost		$—			$—			$35			$—
Interest cost	60			3			64			5
Expected return on plan assets	(86		)	(3		)	(94		)	(4		)
Amortization of prior service credit	—			—			(9		)	—
Recognized net actuarial loss	12			—			21			—
Net periodic (benefit)/cost		($14	)		$—			$17			$1