Employee Benefit Plans (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Purchase price of common stock as percentage of market value			95.00%
Minimum percentage that will ultimately vest under performance-based restricted stock awards based on performance target	0.00%
Maximum percentage that will ultimately vest under performance-based restricted stock awards based on performance target	150.00%
Shares repurchased	1.5	2.0	6.9	8.2
Stock-based compensation expense	$ 22.4	$ 20.3	$ 64.3	$ 65.8
Total stock-based compensation - related tax benefits	8.4	7.5	24.1	24.3
Stock Options Granted Prior To July 2008 [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting term options granted			5 years
Stock options - term for stock options granted, in years			10 years
Stock Options Granted After July 2008 [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting term options granted			4 years
Stock options - term for stock options granted, in years			10 years
Time-Based Restricted Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting term options granted			5 years
Performance-Based Restricted Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting term options granted			24 months
Non-Vested Stock Options [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total remaining unrecognized compensation cost	11.9		11.9
Weighted-average remaining requisite vesting period			2 years 1 month 18 days
Non-Vested Restricted Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total remaining unrecognized compensation cost	$ 74.6		$ 74.6
Weighted-average remaining requisite vesting period			1 year 6 months 27 days