Share-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2011

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock Option and SAR Activity

Stock option and SAR activity for the year ended December 31, 2011 is summarized in the table below:

	Shares		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Life	Aggregate Intrinsic Value
	(in millions)				(in years)	(in millions)
Outstanding at beginning of period	112		$	40
Granted	1		44
Exercised	(18	)	29
Forfeited	(4	)	44
Outstanding at end of period	91		42		4.7	$	916
Exercisable at end of period	74		44		4.1	610
Vested and expected to vest end of period	91		42		4.7	905

Share-Based Compensation Principal Fair Value Assumptions

The principal assumptions the Company used in applying the option-pricing model were as follows:

	2011	2010	2009
Risk free interest rate	0.9% - 2.3%	1.0% - 2.1%	1.7%-2.4%
Expected volatility	44.3% - 45.1%	45.4% - 46.2%	41.3% - 46.8%
Expected dividend yield	1.0% - 1.4%	0.1% - 1.7%	0.1%
Forfeiture rate	5.0%	5.0%	5.0%
Expected life in years	4.9 - 5.0	4.6 - 5.1	4.4 - 5.1

Restricted Share Activity

Restricted share activity for the year ended December 31, 2011 is summarized in the table below:

(shares in millions)	Shares		Weighted-Average Grant Date Fair Value per Share
Nonvested at beginning of period	13		$	31
Granted	8		42
Vested	(3	)	32
Forfeitures	(1	)	35
Nonvested at end of period	17		36