Debt	9 Months Ended
Sep. 30, 2012
Debt Disclosure [Abstract]
Debt	In March 2012, we redeemed, at par plus accrued interest, a $150 million term loan that was scheduled to mature in the fourth quarter of 2012. In April 2012, we entered into forward starting swap agreements with an aggregate notional value of $150 million to hedge the interest rate risk associated with the forecasted issuance of long-term debt. The anticipated debt issuance did not occur prior to the expiration of these swap agreements and a loss of $6 million was recognized in the second quarter of 2012. In June 2012, we redeemed our $400 million, 4.625% notes (the 2012 Notes) that were scheduled to mature in October 2012. As a result of the early redemption of the 2012 Notes, we recorded a net loss of $2 million on the extinguishment of debt. At September 30, 2012, there were no outstanding commercial paper borrowings. During the quarter, commercial paper borrowings averaged $418 million at a weighted-average interest rate of 0.48% and the maximum amount outstanding at any time was $709 million. In October 2012, we borrowed $220 million under term loan agreements. The loans bear interest at the applicable London Interbank Offered Rate (LIBOR) plus 2.25% or Prime Rate plus 1.25%, at our option. Interest is payable quarterly and the loans mature in 2015 and 2016. The proceeds from the loans will be used for general corporate purposes, including the repayment of commercial paper and 2013 debt maturities.

In March 2012, we redeemed, at par plus accrued interest, a $150 million term loan that was scheduled to mature in the fourth quarter of 2012.

In April 2012, we entered into forward starting swap agreements with an aggregate notional value of $150 million to hedge the interest rate risk associated with the forecasted issuance of long-term debt. The anticipated debt issuance did not occur prior to the expiration of these swap agreements and a loss of $6 million was recognized in the second quarter of 2012.

In June 2012, we redeemed our $400 million, 4.625% notes (the 2012 Notes) that were scheduled to mature in October 2012. As a result of the early redemption of the 2012 Notes, we recorded a net loss of $2 million on the extinguishment of debt.

At September 30, 2012, there were no outstanding commercial paper borrowings. During the quarter, commercial paper borrowings averaged $418 million at a weighted-average interest rate of 0.48% and the maximum amount outstanding at any time was $709 million.

In October 2012, we borrowed $220 million under term loan agreements. The loans bear interest at the applicable London Interbank Offered Rate (LIBOR) plus 2.25% or Prime Rate plus 1.25%, at our option. Interest is payable quarterly and the loans mature in 2015 and 2016. The proceeds from the loans will be used for general corporate purposes, including the repayment of commercial paper and 2013 debt maturities.