Treasury Stock	3 Months Ended
Mar. 31, 2013
Treasury Stock Disclosure [Abstract]
Treasury Stock	13. TREASURY STOCK Stock Repurchase Programs The Company’s Board of Directors authorized an ongoing stock repurchase program with a total repurchase authority granted to the Company of $3.4 billion. The Company may use the approved dollar authority to repurchase stock at any time until the approved amount is exhausted. The objective of the Company’s stock repurchase program is to improve stockholders’ returns. At March 31, 2013, approximately $274.2 million was available to repurchase common stock pursuant to the stock repurchase program. All shares repurchased are recorded as treasury stock. A portion of the funds used to repurchase stock over the course of the program was provided by proceeds from employee stock option exercises and the related tax benefit. The Company is authorized to make open market purchases of its common stock using general corporate funds through open market purchases or pursuant to a Rule 10b5-1 plan. During the three months ended March 31, 2013, the Company expended approximately $61.4 million on open market purchases, repurchasing 860,500 shares of outstanding common stock at an average price of $71.31. During the three months ended March 31, 2012, the Company expended approximately $100.0 million on open market purchases, repurchasing 1,378,600 shares of outstanding common stock at an average price of $72.53. Shares for Tax Withholding During the three months ended March 31, 2013, the Company withheld 322,538 shares from stock units that vested, totaling $23.2 million, to satisfy minimum tax withholding obligations that arose on the vesting of stock units. During the three months ended March 31, 2012, the Company withheld 183,050 shares from stock units that vested, totaling $14.1 million, to satisfy minimum tax withholding obligations that arose on the vesting of stock units. These shares are reflected as treasury stock in the Company’s condensed consolidated balance sheets and the related cash outlays do not reduce the Company’s total stock repurchase authority.

Treasury Stock

3 Months Ended

Mar. 31, 2013

Treasury Stock Disclosure [Abstract]

13. TREASURY STOCK

Stock Repurchase Programs

The Company’s Board of Directors authorized an ongoing stock repurchase program with a total repurchase authority granted to the Company of $3.4 billion. The Company may use the approved dollar authority to repurchase stock at any time until the approved amount is exhausted. The objective of the Company’s stock repurchase program is to improve stockholders’ returns. At March 31, 2013, approximately $274.2 million was available to repurchase common stock pursuant to the stock repurchase program. All shares repurchased are recorded as treasury stock. A portion of the funds used to repurchase stock over the course of the program was provided by proceeds from employee stock option exercises and the related tax benefit.

The Company is authorized to make open market purchases of its common stock using general corporate funds through open market purchases or pursuant to a Rule 10b5-1 plan.

During the three months ended March 31, 2013, the Company expended approximately $61.4 million on open market purchases, repurchasing 860,500 shares of outstanding common stock at an average price of $71.31.

During the three months ended March 31, 2012, the Company expended approximately $100.0 million on open market purchases, repurchasing 1,378,600 shares of outstanding common stock at an average price of $72.53.

Shares for Tax Withholding

During the three months ended March 31, 2013, the Company withheld 322,538 shares from stock units that vested, totaling $23.2 million, to satisfy minimum tax withholding obligations that arose on the vesting of stock units. During the three months ended March 31, 2012, the Company withheld 183,050 shares from stock units that vested, totaling $14.1 million, to satisfy minimum tax withholding obligations that arose on the vesting of stock units. These shares are reflected as treasury stock in the Company’s condensed consolidated balance sheets and the related cash outlays do not reduce the Company’s total stock repurchase authority.