Debt	3 Months Ended
Mar. 31, 2019
Debt Disclosure [Abstract]
Debt	DEBT Debt Issuance. On March 4, 2019, the Company issued $500 million aggregate principal amount of 4.10% senior notes that will mature on March 4, 2049. The net proceeds of the issuance, after the deduction of the underwriting discount and expenses payable by the Company, totaled approximately $492 million. Interest on the senior notes is payable semi-annually in arrears on March 4 and September 4. Prior to September 4, 2048, the senior notes may be redeemed, in whole or in part, at the Company’s option, at any time or from time to time, at a redemption price equal to the greater of (a) 100% of the principal amount of any senior notes to be redeemed or (b) the sum of the present values of the remaining scheduled payments of principal and interest to but excluding September 4, 2048 on any senior notes to be redeemed (exclusive of interest accrued to the date of redemption) discounted to the date of redemption on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the then current Treasury rate (as defined in the senior notes), plus 20 basis points. On or after September 4, 2048, the senior notes may be redeemed, in whole or in part, at the Company’s option, at any time or from time to time, at a redemption price equal to 100% of the principal amount of any senior notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date. Commercial Paper. The Company had $100 million of commercial paper outstanding at both March 31, 2019 and December 31, 2018.

DEBT

Debt Issuance. On March 4, 2019, the Company issued $500 million aggregate principal amount of 4.10% senior notes that will mature on March 4, 2049. The net proceeds of the issuance, after the deduction of the underwriting discount and expenses payable by the Company, totaled approximately $492 million. Interest on the senior notes is payable semi-annually in arrears on March 4 and September 4. Prior to September 4, 2048, the senior notes may be redeemed, in whole or in part, at the Company’s option, at any time or from time to time, at a redemption price equal to the greater of (a) 100% of the principal amount of any senior notes to be redeemed or (b) the sum of the present values of the remaining scheduled payments of principal and interest to but excluding September 4, 2048 on any senior notes to be redeemed (exclusive of interest accrued to the date of redemption) discounted to the date of redemption on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the then current Treasury rate (as defined in the senior notes), plus 20 basis points. On or after September 4, 2048, the senior notes may be redeemed, in whole or in part, at the Company’s option, at any time or from time to time, at a redemption price equal to 100% of the principal amount of any senior notes to be redeemed, plus accrued and unpaid interest to, but excluding, the redemption date.

Commercial Paper. The Company had $100 million of commercial paper outstanding at both March 31, 2019 and December 31, 2018.