Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Jan. 31, 2014	Jan. 31, 2013
Cash flows from operating activities:
Net income	$ 526	$ 478
Adjustments to reconcile net income to net cash provided by operations:
Depreciation and amortization	36	36
Stock-based compensation expense	9	7
Deferred income taxes	(22)	29
Changes in assets and liabilities	(159)	(183)
Cash provided by operating activities	390	367
Cash flows from investing activities:
Additions to property, plant, and equipment	(87)	(59)
Computer software expenditures	(2)	0
Cash used for investing activities	(89)	(59)
Cash flows from financing activities:
Net increase in short-term borrowings	8	6
Repayment of long-term debt	(2)	(3)
Proceeds from long-term debt	0	748
Debt issuance costs	0	(7)
Net payments related to exercise of stock-based awards	(9)	(15)
Excess tax benefits from stock-based awards	9	18
Acquisition of treasury stock	(49)	0
Dividends paid	(171)	(1,008)
Cash used for financing activities	(214)	(261)
Effect of exchange rate changes on cash and cash equivalents	(4)	2
Net increase (decrease) in cash and cash equivalents	83	49
Cash and cash equivalents, beginning of period	204	338
Cash and cash equivalents, end of period	$ 287	$ 387