Share Repurchase Programs	9 Months Ended
Sep. 30, 2013
Payments for Repurchase of Equity [Abstract]
Share Repurchase Programs	Share Repurchase Program On September 19, 2012, the Company’s Board of Directors authorized a share repurchase program for up to $6.0 billion of outstanding common stock (the “2012 Repurchase Program”). The share repurchase authorization, which was effective immediately, permits the Company to effect repurchases from time to time through a combination of open market repurchases, privately negotiated transactions, accelerated share repurchase transactions, and/or other derivative transactions. The 2012 Repurchase Program may be modified or terminated by the Board of Directors at any time. During the three and nine months ended September 30, 2013, the Company repurchased an aggregate of 25.8 million and 39.6 million shares of common stock for approximately $1.5 billion and $2.3 billion, respectively, pursuant to the 2012 Repurchase Program. As of September 30, 2013, approximately $2.4 billion remained available for future repurchases under the 2012 Repurchase Program. Pursuant to the authorization under the 2012 Repurchase Program, effective October 1, 2013, the Company entered into a $1.7 billion fixed dollar accelerated share repurchase ("ASR") agreement with Barclays Bank PLC ("Barclays"). Upon payment of the $1.7 billion purchase price on October 1, 2013, the Company received a number of shares of its common stock equal to 50% of the $1.7 billion notional amount of the ASR agreement or approximately 14.9 million shares at a price of $57.18 per share. At the conclusion of the ASR program, the Company may receive additional shares equal to the remaining 50% of the $1.7 billion notional amount (approximately 14.9 million shares as of October 1, 2013). The ultimate number of shares the Company may receive will fluctuate based on changes in the daily volume-weighted average price of the Company's stock over a period beginning on October 1, 2013 and ending on or before December 30, 2013. If the mean daily volume-weighted average price of the Company's common stock, less a discount (the "forward price"), during the ASR program falls below $57.18 per share, the Company will receive a higher number of shares from Barclays. If the forward price rises above $57.18 per share, the Company will either receive fewer shares from Barclays or, potentially have an obligation to Barclays which, at the Company's option, could be settled in additional cash or by issuing shares. Under the terms of the agreement, the maximum number of shares that could be received or delivered is 59.5 million. The ASR agreement will be accounted for as an initial treasury stock transaction and a forward contract. The forward contract will be classified as an equity instrument. The initial repurchase of shares will result in an immediate reduction of the outstanding shares used to calculate the weighted average common shares outstanding for basic and diluted net income per share.

Share Repurchase Program

On September 19, 2012, the Company’s Board of Directors authorized a share repurchase program for up to $6.0 billion of outstanding common stock (the “2012 Repurchase Program”). The share repurchase authorization, which was effective immediately, permits the Company to effect repurchases from time to time through a combination of open market repurchases, privately negotiated transactions, accelerated share repurchase transactions, and/or other derivative transactions. The 2012 Repurchase Program may be modified or terminated by the Board of Directors at any time.

During the three and nine months ended September 30, 2013, the Company repurchased an aggregate of 25.8 million and 39.6 million shares of common stock for approximately $1.5 billion and $2.3 billion, respectively, pursuant to the 2012 Repurchase Program. As of September 30, 2013, approximately $2.4 billion remained available for future repurchases under the 2012 Repurchase Program.

Pursuant to the authorization under the 2012 Repurchase Program, effective October 1, 2013, the Company entered into a $1.7 billion fixed dollar accelerated share repurchase ("ASR") agreement with Barclays Bank PLC ("Barclays"). Upon payment of the $1.7 billion purchase price on October 1, 2013, the Company received a number of shares of its common stock equal to 50% of the $1.7 billion notional amount of the ASR agreement or approximately 14.9 million shares at a price of $57.18 per share. At the conclusion of the ASR program, the Company may receive additional shares equal to the remaining 50% of the $1.7 billion notional amount (approximately 14.9 million shares as of October 1, 2013). The ultimate number of shares the Company may receive will fluctuate based on changes in the daily volume-weighted average price of the Company's stock over a period beginning on October 1, 2013 and ending on or before December 30, 2013. If the mean daily volume-weighted average price of the Company's common stock, less a discount (the "forward price"), during the ASR program falls below $57.18 per share, the Company will receive a higher number of shares from Barclays. If the forward price rises above $57.18 per share, the Company will either receive fewer shares from Barclays or, potentially have an obligation to Barclays which, at the Company's option, could be settled in additional cash or by issuing shares. Under the terms of the agreement, the maximum number of shares that could be received or delivered is 59.5 million. The ASR agreement will be accounted for as an initial treasury stock transaction and a forward contract. The forward contract will be classified as an equity instrument. The initial repurchase of shares will result in an immediate reduction of the outstanding shares used to calculate the weighted average common shares outstanding for basic and diluted net income per share.