Share-Based Compensation	3 Months Ended
Share-Based Compensation	Mar. 31, 2012
Share-Based Compensation [Abstract]
Share-Based Compensation	3. Share-Based Compensation The Company recognized $14 million and $12 million of share-based compensation expense during the three months ended March 31, 2012 and 2011, respectively. The Company's annual grant of share-based awards generally occurs in the first quarter. During the first quarter of 2012, the Company granted 0.9 million stock options and 0.4 million restricted stock units at weighted-average estimated fair values of $21.55 and $65.17, respectively. During the first quarter of 2011, the Company granted 1.0 million stock options and 0.3 million restricted stock units at weighted-average estimated fair values of $22.68 and $61.67, respectively. During the first quarter of 2012 and 2011, stock options to purchase 0.8 million shares and 0.7 million shares, respectively, were exercised.

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

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-Name Staff Accounting Bulletin (SAB)

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-Name Statement of Financial Accounting Standard (FAS)

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+ Details