Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Oct. 31, 2017	Oct. 31, 2016
Cash flows from operating activities:
Net income	$ 417	$ 342
Adjustments to reconcile net income to net cash provided by operations:
Depreciation and amortization	31	28
Stock-based compensation expense	9	7
Deferred income taxes	(10)	(7)
Changes in assets and liabilities, excluding the effects of acquisition of business	(233)	(201)
Cash provided by operating activities	214	169
Cash flows from investing activities:
Acquisition of business, net of cash acquired	0	(307)
Additions to property, plant, and equipment	(64)	(36)
Computer software expenditures	(1)	(1)
Cash used for investing activities	(65)	(344)
Cash flows from financing activities:
Net change in short-term borrowings	21	6
Proceeds from long-term debt	0	717
Debt issuance costs	0	(5)
Net payments related to exercise of stock-based awards	(7)	(5)
Acquisition of treasury stock	(1)	(442)
Dividends paid	(140)	(134)
Cash provided by (used for) financing activities	(127)	137
Effect of exchange rate changes on cash and cash equivalents	8	(14)
Net increase (decrease) in cash and cash equivalents	30	(52)
Cash and cash equivalents, beginning of period	182	263
Cash and cash equivalents, end of period	$ 212	$ 211