Debt (Tables)

9 Months Ended

Sep. 30, 2018

Debt Disclosure [Abstract]

Schedule of Debt

A summary of short-term and long-term debt outstanding is as follows:

(in millions)	September 30, 2018		December 31, 2017
2.5% Senior Notes, due 2018 1	$	—	$	399
3.3% Senior Notes, due 2020 2	698		697
4.0% Senior Notes, due 2025 3	692		692
4.4% Senior Notes, due 2026 4	892		892
2.95% Senior Notes, due 2027 5	493		493
6.55% Senior Notes, due 2037 6	396		396
4.5% Senior Notes, due 2048 7	490		—
Total debt	3,661		3,569
Less: short-term debt including current maturities	—		399
Long-term debt	$	3,661	$	3,170

¹  We made a $400 million early repayment of our 2.5% senior notes in June of 2018.

²  Interest payments are due semiannually on February 14 and August 14, and as of September 30, 2018, the unamortized debt discount and issuance costs total $2 million.

³  Interest payments are due semiannually on June 15 and December 15, and as of September 30, 2018, the unamortized debt discount and issuance costs total $8 million.

⁴  Interest payments are due semiannually on February 15 and August 15, and as of September 30, 2018, the unamortized debt discount and issuance costs total $8 million.

⁵  Interest payments are due semiannually on January 22 and July 22, and as of September 30, 2018, the unamortized debt discount and issuance costs total $7 million.

⁶  Interest payments are due semiannually on May 15 and November 15, and as of September 30, 2018, the unamortized debt discount and issuance costs total $4 million.

⁷  Interest payments are due semiannually on May 15 and November 15, beginning on November 15, 2018, and as of September 30, 2018, the unamortized debt discount and issuance costs total $10 million.