Debt	3 Months Ended
Mar. 31, 2014
Debt Disclosure [Abstract]
Debt Disclosure	At March 31, 2014, short-term debt consisted entirely of securities lending agreements. We had no amount outstanding on our revolving credit facility at March 31, 2014. In March 2014, we issued $350.0 million of unsecured 10-year senior notes in a public offering. The notes have an annual coupon rate of 4.00%. During the three months ended March 31, 2014, we made principal payments of $15.0 million on our senior secured non-recourse notes issued by Northwind Holdings, LLC. In January 2013, we purchased and retired the outstanding principal of $62.5 million on our senior secured non-recourse notes issued by Tailwind Holdings, LLC, resulting in a before-tax gain of $4.0 million. Subsequent to March 31, 2014, we gave notice of our election to redeem on May 15, 2014 a portion of the outstanding principal of the U.S. dollar-denominated debt issued by one of our U.K. subsidiaries. An aggregate principal amount of $145.0 million of the 6.85% debt will be redeemed at a redemption price equal to the greater of the principal amount of the debt redeemed or the make-whole amount, plus in each case any accrued and unpaid interest on the principal amount redeemed. In conjunction with this redemption, we will reclassify the applicable portion of the deferred gain on cash flow hedges from accumulated other comprehensive income to earnings. We expect the redemption to have an immaterial impact on our second quarter of 2014 net income.

Debt

3 Months Ended

Mar. 31, 2014

At March 31, 2014, short-term debt consisted entirely of securities lending agreements.

We had no amount outstanding on our revolving credit facility at March 31, 2014.

In March 2014, we issued $350.0 million of unsecured 10-year senior notes in a public offering. The notes have an annual coupon rate of 4.00%.

During the three months ended March 31, 2014, we made principal payments of $15.0 million on our senior secured non-recourse notes issued by Northwind Holdings, LLC.

In January 2013, we purchased and retired the outstanding principal of $62.5 million on our senior secured non-recourse notes issued by Tailwind Holdings, LLC, resulting in a before-tax gain of $4.0 million.

Subsequent to March 31, 2014, we gave notice of our election to redeem on May 15, 2014 a portion of the outstanding principal of the U.S. dollar-denominated debt issued by one of our U.K. subsidiaries. An aggregate principal amount of $145.0 million of the 6.85% debt will be redeemed at a redemption price equal to the greater of the principal amount of the debt redeemed or the make-whole amount, plus in each case any accrued and unpaid interest on the principal amount redeemed. In conjunction with this redemption, we will reclassify the applicable portion of the deferred gain on cash flow hedges from accumulated other comprehensive income to earnings. We expect the redemption to have an immaterial impact on our second quarter of 2014 net income.