Long-term Debt	12 Months Ended
Dec. 31, 2012
Debt Disclosure [Abstract]
Long-term Debt	Long-term Debt In 2011, we entered into an agreement for an unsecured five-year revolving credit facility that allowed us to borrow up to $2.5 billion, with interest payable on borrowed amounts set at LIBOR plus 1.0%. No amounts were drawn down under this agreement as of December 31, 2011. This credit facility was terminated in February 2012. In February 2012, we entered into a new agreement for an unsecured five-year revolving credit facility that allows us to borrow up to $5 billion for general corporate purposes, with interest payable on the borrowed amounts set at LIBOR plus 1.0%. Origination fees are amortized over the term of the credit facility. Under the terms of the agreement, we are obligated to pay a commitment fee of 0.10% per annum on the daily undrawn balance. As of December 31, 2012, no amounts were drawn down and we were in compliance with the covenants under this credit facility. Concurrent with our entering into the revolving credit facility in February 2012, we also entered into a bridge credit facility agreement that allows us to borrow up to $3 billion to fund tax withholding and remittance obligations related to the settlement of RSUs in connection with our IPO, with interest payable on the borrowed amounts set at LIBOR plus 1.0% and an additional 0.25% payable on drawn balances outstanding from and after the 180th day of borrowing. Under the terms of the agreement, we are obligated to pay a commitment fee of 0.10% per annum on the daily undrawn balance from and after the 90th day following the date we entered into the bridge facility. In October 2012, we amended and restated our bridge credit facility, and converted it into a three-year unsecured term loan facility (Amended and Restated Term Loan) that allows us to borrow up to $1.5 billion to fund tax withholding and remittance obligations related to the settlement of RSUs in connection with our IPO with interest payable on the borrowed amounts set at LIBOR plus 1.0%, as well as an annual commitment fee of 0.10% on the daily undrawn balance of the facility. We paid origination fees at closing of the Amended and Restated Term Loan, which fees are being amortized over the term of the facility. On October 25, 2012, we fully drew down the $1.5 billion available on the Amended and Restated Term Loan to fund a portion of the withholding tax liability that arise due to the vesting and settlement of RSUs in October and November 2012. We paid an additional upfront fee of 0.15% of the $1.5 billion drawn down on the funding date, which fee is being amortized over the remaining term of the facility. The amount outstanding under this facility will become due and payable on October 25, 2015. As of December 31, 2012, we were in compliance with the covenants in the Amended and Restated Term Loan. In connection with the draw down of the Amended and Restated Term Loan, we entered into an interest rate swap agreement with an effective date of October 25, 2012. The notional amount of the interest rate swap agreement is $1.5 billion and the agreement converts the one-month LIBOR rate on the corresponding notional amount of debt to a fixed interest rate of 1.46% to hedge our exposure to interest rate fluctuation. This interest rate swap has a maturity date of October 25, 2015. We have designated the interest rate swap agreement as a qualifying hedging instrument and accounted for it as a cash flow hedge. As of December 31, 2012 the change in fair value of this interest rate swap agreement, net of tax was $2 million and is recognized in AOCI with the corresponding fair value of $4 million included in other liabilities on our consolidated balance sheet. For the year ended December 31, 2012, the amount of loss in other comprehensive income reclassified to interest expense was not significant. There were no realized gains or losses on derivative other than those related to the periodic settlement of the interest rate swap. We estimate that $3 million of derivative losses included in AOCI will be reclassified into earnings within the next 12 months. This amount has been calculated based on the variable interest rate assumptions used in the fair value calculation of the interest rate swap agreement as of December 31, 2012.

Long-term Debt

In 2011, we entered into an agreement for an unsecured five-year revolving credit facility that allowed us to borrow up to $2.5 billion, with interest payable on borrowed amounts set at LIBOR plus 1.0%. No amounts were drawn down under this agreement as of December 31, 2011. This credit facility was terminated in February 2012.

In February 2012, we entered into a new agreement for an unsecured five-year revolving credit facility that allows us to borrow up to $5 billion for general corporate purposes, with interest payable on the borrowed amounts set at LIBOR plus 1.0%. Origination fees are amortized over the term of the credit facility. Under the terms of the agreement, we are obligated to pay a commitment fee of 0.10% per annum on the daily undrawn balance. As of December 31, 2012, no amounts were drawn down and we were in compliance with the covenants under this credit facility.

Concurrent with our entering into the revolving credit facility in February 2012, we also entered into a bridge credit facility agreement that allows us to borrow up to $3 billion to fund tax withholding and remittance obligations related to the settlement of RSUs in connection with our IPO, with interest payable on the borrowed amounts set at LIBOR plus 1.0% and an additional 0.25% payable on drawn balances outstanding from and after the 180th day of borrowing. Under the terms of the agreement, we are obligated to pay a commitment fee of 0.10% per annum on the daily undrawn balance from and after the 90th day following the date we entered into the bridge facility.

In October 2012, we amended and restated our bridge credit facility, and converted it into a three-year unsecured term loan facility (Amended and Restated Term Loan) that allows us to borrow up to $1.5 billion to fund tax withholding and remittance obligations related to the settlement of RSUs in connection with our IPO with interest payable on the borrowed amounts set at LIBOR plus 1.0%, as well as an annual commitment fee of 0.10% on the daily undrawn balance of the facility. We paid origination fees at closing of the Amended and Restated Term Loan, which fees are being amortized over the term of the facility. On October 25, 2012, we fully drew down the $1.5 billion available on the Amended and Restated Term Loan to fund a portion of the withholding tax liability that arise due to the vesting and settlement of RSUs in October and November 2012. We paid an additional upfront fee of 0.15% of the $1.5 billion drawn down on the funding date, which fee is being amortized over the remaining term of the facility. The amount outstanding under this facility will become due and payable on October 25, 2015. As of December 31, 2012, we were in compliance with the covenants in the Amended and Restated Term Loan.

In connection with the draw down of the Amended and Restated Term Loan, we entered into an interest rate swap agreement with an effective date of October 25, 2012. The notional amount of the interest rate swap agreement is $1.5 billion and the agreement converts the one-month LIBOR rate on the corresponding notional amount of debt to a fixed interest rate of 1.46% to hedge our exposure to interest rate fluctuation. This interest rate swap has a maturity date of October 25, 2015. We have designated the interest rate swap agreement as a qualifying hedging instrument and accounted for it as a cash flow hedge.

As of December 31, 2012 the change in fair value of this interest rate swap agreement, net of tax was $2 million and is recognized in AOCI with the corresponding fair value of $4 million included in other liabilities on our consolidated balance sheet. For the year ended December 31, 2012, the amount of loss in other comprehensive income reclassified to interest expense was not significant. There were no realized gains or losses on derivative other than those related to the periodic settlement of the interest rate swap.

We estimate that $3 million of derivative losses included in AOCI will be reclassified into earnings within the next 12 months. This amount has been calculated based on the variable interest rate assumptions used in the fair value calculation of the interest rate swap agreement as of December 31, 2012.