Employee Benefit Plans (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2009	Jun. 30, 2008	Jun. 30, 2012	Jul. 31, 2011
Purchase price of common stock as percentage of market value			95.00%	85.00%
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%
Vesting term of performance-based restricted stock	approximately 18 months
Total stock-based compensation	$ 76.3	$ 67.6	$ 96.0
Total stock-based compensation - related tax benefit	28.2	22.3	27.6
Aggregate intrinsic value of stock options outstanding	284.1
Aggregate intrinsic value of stock options exercisable	237.7
Aggregate intrinsic value of stock options exercised	95.7	29.1	19.7
Number of shares issued in connection with the employees stock purchase plan	1.4
Accumulated benefit obligation	1,167.4	1,078.5
Compensation expense recognition	Compensation expense is recognized on a straight-line basis over the vesting period
Expected future employer contribution					8.6	75.0
Expected future plan benefit payments - 2012	49.8
Expected future plan benefit payments - 2013	55.3
Expected future plan benefit payments - 2014	61.1
Expected future plan benefit payments - 2015	69.0
Expected future plan benefit payments - 2016	76.9
Expected future plan benefit payments - 2017 to 2021	543.9
Employee contribution percentage to retirement and saving plan	35.00%
Highly compensated employee contribution percentage to retirement and saving plan	10.00%
Retirement and savings plan - company match of employee contributions	57.5	55.8	52.1
Net Actuarial And Other Loss Net Of Tax [Member]
Pension costs included in accumulated other comprehensive income and not yet recognized in net period benefit cost	276.0
Pension costs in accumulated other comprehensive income amortized into net period benefit cost over the next fiscal year	13.7
Prior Service Cost Net Of Tax [Member]
Pension costs included in accumulated other comprehensive income and not yet recognized in net period benefit cost	7.8
Pension costs in accumulated other comprehensive income amortized into net period benefit cost over the next fiscal year	1.1
Transition Obligation Net Of Tax [Member]
Pension costs included in accumulated other comprehensive income and not yet recognized in net period benefit cost	1.0
Pension costs in accumulated other comprehensive income amortized into net period benefit cost over the next fiscal year	0.2
Stock Options Granted Prior To July 2008 [Member]
Stock options - term in years for stock options granted prior to July 1, 2008	10
Vesting term of performance-based restricted stock	5
Stock Options Granted After July 2008 [Member]
Stock options - term in years for stock options granted prior to July 1, 2008	10
Vesting term of performance-based restricted stock	4
Nonvested Stock Options [Member]
Total remaining unrecognized compensation cost	9.6
Amortization period for total remaining unrecognized compensation cost	1.5
Nonvested Restricted Stock [Member]
Total remaining unrecognized compensation cost	$ 42.8
Amortization period for total remaining unrecognized compensation cost	1.1