Stock-Based Compensation Plans (Tables)

6 Months Ended

Jun. 30, 2012

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

Time-based Restricted Stock Units

Shares in Millions Except Per Share Amounts	Number of Shares		Weighted Average Fair Value at Date of Grant
Non-vested at December 31, 2011	2.1		$	11.72
Granted	0.9		12.93
Vested	(1.0	)	10.22
Forfeited	(0.2	)	13.01
Non-vested at June 30, 2012	1.8		$	12.93

Performance and Market-based Restricted Stock Units

Shares in Millions Except Per Share Amounts	Number of Shares		Weighted Average Fair Value at Date of Grant
Non-vested at December 31, 2011	1.8		$	10.31
Granted	0.6		12.93
Vested	(0.9	)	9.14
Forfeited	(0.3	)	10.41
Non-vested at June 30, 2012	1.2		$	12.67

Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]

Shares in Millions Except Per Share Amounts	Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Term (in years)	Weighted Average Fair Value at Date of Grant (per share)
Options outstanding at January 1, 2012	3.9		$	23.90	2.1	$	10.17
Options exercisable at January 1, 2012	3.2		$	25.97	0.7	$	9.15
Granted	0.7		12.79		9.6	3.43
Exercised	(0.5	)	11.69
Forfeited	(2.0	)	34.39
Options outstanding at June 30, 2012	2.1		$	12.74	5.7	$	4.20
Options exercisable at June 30, 2012	0.9		$	12.04	1.4	$	4.79