Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2019
Cash Flows From Operating Activities
Net earnings	$ 166.8	$ 172.2	$ 232.8	$ 298.8
Adjustments to reconcile net earnings to net cash flows provided by operating activities:
Depreciation and amortization			56.5	63.7
Amortization of acquired intangibles and purchased intellectual property			90.9	64.3
Amortization of other assets			76.0	66.8
Write-down of long-lived assets			32.1
Stock-based compensation expense	17.3	17.4	47.6	46.8
Deferred income taxes			9.7	17.4
Other			(16.0)	(27.2)
Current assets and liabilities:
Increase in Accounts receivable, net			(142.7)	(174.0)
Increase in Other current assets			(21.7)	(13.3)
Decrease in Payables and accrued expenses			(22.7)	(55.1)
Increase in Contract liabilities			18.2	18.6
Non-current assets and liabilities:
Increase in Other non-current assets			(244.7)	(140.9)
Increase in Other non-current liabilities			39.6	51.9
Net cash flows provided by operating activities			155.6	217.9
Cash Flows From Investing Activities
Capital expenditures			(48.5)	(30.9)
Software purchases and capitalized internal use software			(25.0)	(15.5)
Acquisitions, net of cash acquired			(339.1)	0.0
Other investing activities			(15.3)	(2.8)
Net cash flows used in investing activities			(427.9)	(49.1)
Cash Flows From Financing Activities
Debt proceeds			1,575.3	370.0
Debt repayments			(960.6)	(250.0)
Dividends paid			(179.2)	(155.1)
Purchases of Treasury stock			(50.5)	(120.3)
Proceeds from exercise of stock options			26.4	23.6
Other financing activities			(9.8)	(7.1)
Net cash flows provided by (used in) financing activities			401.6	(138.8)
Effect of exchange rate changes on Cash and cash equivalents			(0.4)	(1.9)
Net change in Cash and cash equivalents			128.9	28.2
Cash and cash equivalents, beginning of period			273.2	263.9	$ 263.9
Cash and cash equivalents, end of period	$ 402.1	$ 292.1	402.1	292.1	$ 273.2
Supplemental disclosure of cash flow information:
Cash payments made for interest			37.8	31.2
Cash payments made for income taxes, net of refunds			73.1	82.6
Non-cash investing and financing activities:
Accrual of unpaid property, plant and equipment and software			$ 9.0	$ 4.4