Debt

Our long-term debt (net of unamortized discount and issuance costs) consists of:



(Principal and carrying amounts in millions)	April 30, 2017		October 31, 2017
1.00% senior notes, $250 principal amount, due January 15, 2018	$	249	$	250
2.25% senior notes, $250 principal amount, due January 15, 2023	248		248
1.20% senior notes, €300 principal amount, due July 7, 2026	324		346
2.60% senior notes, £300 principal amount, due July 7, 2028	383		391
3.75% senior notes, $250 principal amount, due January 15, 2043	248		248
4.50% senior notes, $500 principal amount, due July 15, 2045	486		486
	1,938		1,969
Less current portion	249		250
	$	1,689	$	1,719

As of April 30, 2017, our short-term borrowings of $211 million included $208 million of commercial paper, with an average interest rate of 1.04% and a remaining maturity of 22 days. As of October 31, 2017, our short-term borrowings of $235 million included $230 million of commercial paper, with an average interest rate of 1.28% and a remaining maturity of 20 days.