Treasury Stock	9 Months Ended
Sep. 30, 2015
Equity [Abstract]
TREASURY STOCK	TREASURY STOCK Stock Repurchase Program The Company’s Board of Directors authorized an ongoing stock repurchase program with a total repurchase authority granted to the Company of $5.9 billion, of which $500.0 million was approved in September 2015. 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 September 30, 2015, approximately $336.8 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 net proceeds from the Convertible Notes offering, as well as 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, pursuant to a Rule 10b5-1 plan or in privately negotiated transactions. During the three months ended September 30, 2015, the Company expended approximately $279.5 million on open market purchases under the stock repurchase program, repurchasing 3,895,283 shares of outstanding common stock at an average price of $71.75. During the nine months ended September 30, 2015, the Company expended approximately $451.6 million on open market purchases under the stock repurchase program, repurchasing 6,588,783 shares of outstanding common stock at an average price of $68.54. Of the amount expended, $53.6 million had not yet settled as of September 30, 2015 and therefore was excluded from the amount reflected in Stock repurchases, net in the Condensed Consolidated Statements of Cash Flows as it is considered a non-cash item. In October 2015, the Company repurchased an additional 3.6 million shares under the stock repurchase program. During the second quarter of 2014, the Company used a portion of the net proceeds from the Convertible Notes offering and existing cash and investments to repurchase an aggregate of approximately $1.5 billion of its common stock as authorized under the stock repurchase program. Of this $1.5 billion, the Company used approximately $101.0 million to purchase 1.7 million shares from certain purchasers of the Convertible Notes in privately negotiated transactions concurrently with the closing of the offering, and the remaining $1.4 billion to purchase additional shares of common stock under an Accelerated Share Repurchase ("ASR") which the Company entered into with Citibank, N.A. ("Citibank") on April 25, 2014 (the "ASR Agreement"). Under the ASR agreement, the Company paid $1.4 billion to Citibank upon consummation of the ASR and received, in the aggregate, approximately 21.8 million shares of its common stock from Citibank, including approximately 2.6 million shares delivered in October 2014 in final settlement in connection with Citibank's election to accelerate the ASR. The total number of shares of common stock that the Company repurchased under the ASR Agreement was based on the average of the daily volume-weighted average prices of the common stock during the term of the ASR Agreement, less a discount. During the three and nine months ended September 30, 2014, the Company expended approximately $99.9 million on open market purchases under the stock repurchase program, repurchasing 1,434,400 shares of outstanding common stock at an average price of $69.71. Shares for Tax Withholding During the three months ended September 30, 2015, the Company withheld 55,963 shares from stock units that vested, totaling $4.1 million, to satisfy minimum tax withholding obligations that arose on the vesting of stock units. During the nine months ended September 30, 2015, the Company withheld 501,785 shares from stock units that vested, totaling $32.4 million, to satisfy minimum tax withholding obligations that arose on the vesting of stock units. During the three months ended September 30, 2014, the Company withheld 75,797 shares from stock units that vested, totaling $4.9 million, to satisfy minimum tax withholding obligations that arose on the vesting of stock units. During the nine months ended September 30, 2014, the Company withheld 470,567 shares from stock units that vested, totaling $27.8 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

Stock Repurchase Program

The Company’s Board of Directors authorized an ongoing stock repurchase program with a total repurchase authority granted to the Company of $5.9 billion, of which $500.0 million was approved in September 2015. 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 September 30, 2015, approximately $336.8 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 net proceeds from the Convertible Notes offering, as well as 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, pursuant to a Rule 10b5-1 plan or in privately negotiated transactions.

During the three months ended September 30, 2015, the Company expended approximately $279.5 million on open market purchases under the stock repurchase program, repurchasing 3,895,283 shares of outstanding common stock at an average price of $71.75. During the nine months ended September 30, 2015, the Company expended approximately $451.6 million on open market purchases under the stock repurchase program, repurchasing 6,588,783 shares of outstanding common stock at an average price of $68.54. Of the amount expended, $53.6 million had not yet settled as of September 30, 2015 and therefore was excluded from the amount reflected in Stock repurchases, net in the Condensed Consolidated Statements of Cash Flows as it is considered a non-cash item. In October 2015, the Company repurchased an additional 3.6 million shares under the stock repurchase program.

During the second quarter of 2014, the Company used a portion of the net proceeds from the Convertible Notes offering and existing cash and investments to repurchase an aggregate of approximately $1.5 billion of its common stock as authorized under the stock repurchase program. Of this $1.5 billion, the Company used approximately $101.0 million to purchase 1.7 million shares from certain purchasers of the Convertible Notes in privately negotiated transactions concurrently with the closing of the offering, and the remaining $1.4 billion to purchase additional shares of common stock under an Accelerated Share Repurchase ("ASR") which the Company entered into with Citibank, N.A. ("Citibank") on April 25, 2014 (the "ASR Agreement"). Under the ASR agreement, the Company paid $1.4 billion to Citibank upon consummation of the ASR and received, in the aggregate, approximately 21.8 million shares of its common stock from Citibank, including approximately 2.6 million shares delivered in October 2014 in final settlement in connection with Citibank's election to accelerate the ASR. The total number of shares of common stock that the Company repurchased under the ASR Agreement was based on the average of the daily volume-weighted average prices of the common stock during the term of the ASR Agreement, less a discount.

During the three and nine months ended September 30, 2014, the Company expended approximately $99.9 million on open market purchases under the stock repurchase program, repurchasing 1,434,400 shares of outstanding common stock at an average price of $69.71.

Shares for Tax Withholding

During the three months ended September 30, 2015, the Company withheld 55,963 shares from stock units that vested, totaling $4.1 million, to satisfy minimum tax withholding obligations that arose on the vesting of stock units. During the nine months ended September 30, 2015, the Company withheld 501,785 shares from stock units that vested, totaling $32.4 million, to satisfy minimum tax withholding obligations that arose on the vesting of stock units. During the three months ended September 30, 2014, the Company withheld 75,797 shares from stock units that vested, totaling $4.9 million, to satisfy minimum tax withholding obligations that arose on the vesting of stock units. During the nine months ended September 30, 2014, the Company withheld 470,567 shares from stock units that vested, totaling $27.8 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.