Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Jul. 31, 2015	Jul. 31, 2014
Cash flows from operating activities:
Net income	$ 156	$ 150
Adjustments to reconcile net income to net cash provided by operations:
Depreciation and amortization	13	13
Stock-based compensation expense	3	3
Deferred income taxes	2	1
Changes in assets and liabilities	(27)	(55)
Cash provided by operating activities	147	112
Cash flows from investing activities:
Additions to property, plant, and equipment	(39)	(31)
Cash used for investing activities	(39)	(31)
Cash flows from financing activities:
Net increase in short-term borrowings	(176)	5
Proceeds from long-term debt	490	0
Debt issuance costs	(5)	0
Net payments related to exercise of stock-based awards	(5)	(4)
Excess tax benefits from stock-based awards	12	16
Acquisition of treasury stock	(230)	(12)
Dividends paid	(65)	(62)
Cash provided by (used for) financing activities	21	(57)
Effect of exchange rate changes on cash and cash equivalents	(5)	(1)
Net increase (decrease) in cash and cash equivalents	124	23
Cash and cash equivalents, beginning of period	370	437
Cash and cash equivalents, end of period	$ 494	$ 460