Share-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2013

Stock option and SAR activity for the three months ended March 31, 2013 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	63		$	45
Granted	8		57
Exercised	(4	)	36
Forfeited	(2	)	57
Outstanding at end of period	65		47		4.5	$	693
Exercisable at end of period	53		46		3.5	631
Vested and expected to vest, end of period	64		47		4.5	690

Restricted share activity for the three months ended March 31, 2013 is summarized in the table below:



(shares in millions)	Shares	Weighted-Average Grant Date Fair Value per Share
Nonvested at beginning of period	9	$	46
Granted	3	57
Nonvested at end of period	12	49

Other Share-Based Compensation Data



(in millions, except per share amounts)	Three Months Ended March 31,
(in millions, except per share amounts)	2013		2012
Stock Options and SARs
Weighted-average grant date fair value of shares granted, per share	$	19	$	18
Total intrinsic value of stock options and SARs exercised	83		220
Restricted Shares
Weighted-average grant date fair value of shares granted, per share	57		52
Total fair value of restricted shares vested	—		291
Share-Based Compensation Items
Share-based compensation expense, before tax	99		140
Share-based compensation expense, net of tax effects	89		88
Income tax benefit realized from share-based award exercises	33		187



(in millions, except years)	March 31, 2013
Unrecognized compensation expense related to share awards	$	498
Weighted-average years to recognize compensation expense	1.4

The principal assumptions the Company used in calculating grant-date fair value for stock options and SARs were as follows: