Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jul. 31, 2013	Jul. 31, 2012
Cash flows from operating activities:
Net income	$ 143	$ 147
Adjustments to reconcile net income to net cash provided by operations:
Depreciation and amortization	12	12
Stock-based compensation expense	3	2
Deferred income taxes	12	28
Changes in assets and liabilities	(77)	(102)
Cash provided by operating activities	93	87
Cash flows from investing activities:
Additions to property, plant, and equipment	(25)	(17)
Cash used for investing activities	(25)	(17)
Cash flows from financing activities:
Net increase in short-term borrowings	2	2
Repayment of long-term debt	(1)	(1)
Net payments related to exercise of stock-based awards	(3)	(4)
Excess tax benefits from stock-based awards	6	8
Acquisition of treasury stock	(1)	0
Dividends paid	(54)	(50)
Cash used for financing activities	(51)	(45)
Effect of exchange rate changes on cash and cash equivalents	(4)	(2)
Net increase in cash and cash equivalents	13	23
Cash and cash equivalents, beginning of period	204	338
Cash and cash equivalents, end of period	$ 217	$ 361