Employee Benefit Plans (Narrative) (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Shares repurchased	4.6	5.2	8.6	9.4
Nonvested Stock Options [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total remaining unrecognized compensation cost	$ 20.3		$ 20.3
Weighted-average remaining requisite vesting period			2 years 7 months 25 days
Restricted Stock Units (RSUs) [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total remaining unrecognized compensation cost	47.5		$ 47.5
Weighted-average remaining requisite vesting period			1 year 5 months 13 days
Nonvested Restricted Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total remaining unrecognized compensation cost	$ 100.1		$ 100.1
Weighted-average remaining requisite vesting period			1 year 4 months 29 days