Stock Compensation Plans (Tables)

9 Months Ended

Sep. 30, 2012

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]

As of September 30, 2012, the Company’s primary types of stock-based compensation were restricted stock and stock options. Stock-based compensation expense for the following periods was:



In millions	Three months ended September 30		Nine months ended September 30
In millions	2012	2011	2012	2011
Restricted stock	$13	$7	$33	$19
Stock options	1	2	3	5
Total stock-based compensation (pre-tax)	14	9	36	24
Tax benefit	(4)	(2)	(11)	(7)
Total stock-based compensation (net of tax)	$10	$7	$25	$17

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

The weighted average fair value of option grants was estimated based on the below weighted average assumptions and was $8.24 and $7.38 for the nine months ended September 30, 2012 and 2011.



	Three months ended September 30		Nine months ended September 30
	2012	2011	2012	2011
Dividend yield	—	—	—	—
Risk-free interest rate	0.64%	—%	0.78%	2.04%
Expected volatility	40.6%	—%	40.1%	40.4%
Expected holding period (years)	5.0	—	5.0	5.1