Debt (Tables)

9 Months Ended

Jan. 31, 2013

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments

Our long-term debt consisted of the following:

	April 30,		January 31,
(Dollars in millions)	2012		2013
5.00% notes, due in fiscal 2014	$	251.4	$	251.1
2.50% notes, due in fiscal 2016	248.8		249.1
1.00% notes, due in fiscal 2018	—		249.2
2.25% notes, due in fiscal 2023	—		248.4
3.75% notes, due in fiscal 2043	—		249.9
Other	5.3		2.6
	505.5		1,250.3
Less current portion	2.7		253.7
	$	502.8	$	996.6