Debt (Tables)

9 Months Ended

Jan. 31, 2016

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

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

(Dollars in millions)	April 30, 2015		January 31, 2016
2.50% notes, due in fiscal 2016	$	250	$	—
1.00% notes, due in fiscal 2018	248		249
2.25% notes, due in fiscal 2023	247		247
3.75% notes, due in fiscal 2043	248		248
4.50% notes, due in fiscal 2046	—		485
	993		1,229
Less current portion	250		—
	$	743	$	1,229