Consolidated Statements of Stockholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Jun. 30, 2013	$ 816.0	$ 1.6	$ 783.0	$ 811.3	$ (784.1)	$ 4.2
Balances, shares at Jun. 30, 2013		154.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	269.1			263.0		6.1
Stock plans and related tax benefits, value	72.3	$ 0.0	72.3
Stock plans and related tax benefits, shares		0.0
Stock-based compensation	34.4		34.4
Treasury stock acquired	(129.7)				(129.7)
Treasury stock reissued	0.0		(79.0)		79.0
Common stock dividends (in usd per share)	(100.4)			(100.4)
Balance at Jun. 30, 2014	961.7	$ 1.6	810.7	973.9	(834.8)	10.3
Balances, shares at Jun. 30, 2014		154.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	255.9			287.1		(31.2)
Stock plans and related tax benefits, value	102.6	$ 0.0	102.6
Stock plans and related tax benefits, shares		0.0
Stock-based compensation	38.3		38.3
Treasury stock acquired	(301.7)				(301.7)
Treasury stock reissued	0.0		(96.1)		96.1
Common stock dividends (in usd per share)	(129.0)			(129.0)
Balance at Jun. 30, 2015	$ 927.8	$ 1.6	855.5	1,132.0	(1,040.4)	(20.9)
Balances, shares at Jun. 30, 2015	154.5	154.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	$ 290.2			307.5		(17.3)
Stock plans and related tax benefits, value	46.2	$ 0.0	46.2
Stock plans and related tax benefits, shares		0.0
Stock-based compensation	42.8		42.8
Treasury stock acquired	(119.8)				(119.8)
Treasury stock reissued	0.0		(43.3)		43.3
Common stock dividends (in usd per share)	(141.7)			(141.7)
Balance at Jun. 30, 2016	$ 1,045.5	$ 1.6	$ 901.2	$ 1,297.8	$ (1,116.9)	$ (38.2)
Balances, shares at Jun. 30, 2016	154.5	154.5