Debt	9 Months Ended
Sep. 30, 2018
Debt Disclosure [Abstract]
Debt	8. Debt Senior Notes—In the first quarter of 2018, AHL issued $1 billion of unsecured senior notes due in January 2028. The senior notes have a 4.125% coupon rate, payable semi-annually. The senior notes are callable at any time prior to October 12, 2027 by AHL, at a price equal to the greater of (1) 100% of the principal and any accrued and unpaid interest and (2) an amount equal to the sum of the present values of remaining scheduled payments, discounted from the scheduled payment date to the redemption date at the Treasury Rate (as defined in the prospectus supplement relating to the senior notes, dated January 9, 2018) plus 25 basis points, and any accrued and unpaid interest. Interest expense on long-term debt was $10 million and $30 million for the three and nine months ended September 30, 2018, respectively. Short-term Debt—In the second quarter of 2018, we borrowed $183 million from the Federal Home Loan Bank (FHLB) of Des Moines through their variable rate short-term federal funds program. The borrowing carried an interest rate of 2.16% and was repaid in the third quarter of 2018.

Debt

9 Months Ended

Sep. 30, 2018

8. Debt

Senior Notes—In the first quarter of 2018, AHL issued $1 billion of unsecured senior notes due in January 2028. The senior notes have a 4.125% coupon rate, payable semi-annually. The senior notes are callable at any time prior to October 12, 2027 by AHL, at a price equal to the greater of (1) 100% of the principal and any accrued and unpaid interest and (2) an amount equal to the sum of the present values of remaining scheduled payments, discounted from the scheduled payment date to the redemption date at the Treasury Rate (as defined in the prospectus supplement relating to the senior notes, dated January 9, 2018) plus 25 basis points, and any accrued and unpaid interest. Interest expense on long-term debt was $10 million and $30 million for the three and nine months ended September 30, 2018, respectively.

Short-term Debt—In the second quarter of 2018, we borrowed $183 million from the Federal Home Loan Bank (FHLB) of Des Moines through their variable rate short-term federal funds program. The borrowing carried an interest rate of 2.16% and was repaid in the third quarter of 2018.