Employee Benefit Plans (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock options - term for stock options granted, in years	10 years
Shares repurchased	600,000	4,200,000
Stock-based compensation expense	$ 38.8	$ 23.3
Total stock-based compensation - related tax benefits	13.9	8.4
Discontinued Operations Stock Based Compensation Expense	5.1	3.9
Weighted Average converted grant price	$ 46.85
Discontinued Operations Net Pension Expense	4.3	1.2
Defined Benefit Plan, Curtailments	3.2	0
Stock Options Granted Prior To July Two Thousand Eight [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Payment Award Vesting Period	5 years
Stock Options Granted After July 2008 [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Payment Award Vesting Period	4 years
Time Based Restricted Stock granted prior to Fiscal 2013 [Domain]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Payment Award Vesting Period	5 years
Time Based Restricted Stock granted during Fiscal 2013 [Domain] [Domain]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Payment Award Vesting Period	2 years
Performance Based Restricted Stock and Units [Domain]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
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%
Employee Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Purchase price of common stock as percentage of market value	95.00%
Non-Vested Stock Options [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total remaining unrecognized compensation cost	11.5
Weighted-average remaining requisite vesting period	1 year 9 months 29 days
Nonvested Restricted Stock Unit [Domain]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total remaining unrecognized compensation cost	37.2
Weighted-average remaining requisite vesting period	1 year 7 months 2 days
Non-Vested Restricted Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total remaining unrecognized compensation cost	$ 156.8
Weighted-average remaining requisite vesting period	1 year 9 months 20 days
Employee Stock Option [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Shares Increase (Decrease) due to Spinoff	849,000
Time-Based Restricted Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Shares Increase (Decrease) due to Spinoff	261,000
Time-Based Restricted Stock Units [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Shares Increase (Decrease) due to Spinoff	64,000
Performance-Based Restricted Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Shares Increase (Decrease) due to Spinoff	181,000
Performance Based Restricted Stock Unit [Domain]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Shares Increase (Decrease) due to Spinoff	10,000
Minimum [Member] | Performance Based Restricted Stock and Units [Domain]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share Based Payment Award Performance Period	1 year
Maximum [Member] | Performance Based Restricted Stock and Units [Domain]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share Based Payment Award Performance Period	3 years
Share-based Payment Award Requisite Service Period	26 months
CDK Global Inc [Member] | Employee Stock Option [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Shares Increase (Decrease) due to Spinoff	(823,000)
CDK Global Inc [Member] | Time-Based Restricted Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Shares Increase (Decrease) due to Spinoff	(189,000)
CDK Global Inc [Member] | Time-Based Restricted Stock Units [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Shares Increase (Decrease) due to Spinoff	(43,000)
CDK Global Inc [Member] | Performance-Based Restricted Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Shares Increase (Decrease) due to Spinoff	(45,000)
CDK Global Inc [Member] | Performance Based Restricted Stock Unit [Domain]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Shares Increase (Decrease) due to Spinoff	(35,000)