Debt Issuance	9 Months Ended
Sep. 30, 2018
Debt Disclosure [Abstract]
Debt Issuance	Debt Issuance On August 3, 2018, the Corporation issued $500 million of 3.65% senior notes, due August 3, 2028. The senior notes will bear interest from the date they were issued at an annual rate of 3.65%, payable semi-annually in arrears. The senior notes are unsecured and may be redeemed, in whole or in part, on or after May 3, 2028, at a redemption price equal to 100% of the principal amount of the senior notes to be redeemed plus accrued and unpaid interest to, but excluding, the redemption date.

Debt Issuance

9 Months Ended

Sep. 30, 2018

On August 3, 2018, the Corporation issued $500 million of 3.65% senior notes, due August 3, 2028. The senior notes will bear interest from the date they were issued at an annual rate of 3.65%, payable semi-annually in arrears. The senior notes are unsecured and may be redeemed, in whole or in part, on or after May 3, 2028, at a redemption price equal to 100% of the principal amount of the senior notes to be redeemed plus accrued and unpaid interest to, but excluding, the redemption date.