Debt (Tables)

3 Months Ended

Jul. 31, 2016

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

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

(Principal and carrying amounts in millions)	April 30, 2016		July 31, 2016
1.00% notes, $250 principal amount, due in fiscal 2018	$	249	$	249
2.25% notes, $250 principal amount, due in fiscal 2023	248		248
1.20% notes, €300 principal amount, due in fiscal 2027	—		332
2.60% notes, £300 principal amount, due in fiscal 2029	—		391
3.75% notes, $250 principal amount, due in fiscal 2043	248		248
4.50% notes, $500 principal amount, due in fiscal 2046	485		485
	$	1,230	$	1,953