Preferred and Common Stockholder's Equity (Tables)

12 Months Ended

Jun. 30, 2016

Equity [Abstract]

Summary of Common Shares Issued and Outstanding

Common shares issued and outstanding

	Years Ended June 30,
	2016			2015			2014
Common stock issued and outstanding at July 1		68.9			73.5			80.6
Common stock issued upon exercise of options and employee stock plans		4.7			1.4			3.3
Repurchase and retirement of common stock		(4.5	)		(6.0	)		(10.4	)
Common stock issued and outstanding at June 30		69.1			68.9			73.5

Schedule of Stock Repurchases

The shares retired, aggregate common stock and additional paid-in capital reductions, and related charges to accumulated deficit for the repurchases for periods ended June 30, 2016, 2015 and 2014 were as follows:

	Year ended June 30,
	2016		2015		2014
Shares purchased and retired		4.5		6.0		10.4
Common stock and additional paid-in-capital reductions	$	41.2	$	51.5	$	82.5
Charges to retained earnings	$	121.4	$	159.2	$	205.1