Divestiture (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	3 Months Ended			3 Months Ended		3 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2014	Sep. 30, 2014 CDK Global Inc [Member]	Sep. 24, 2014 CDK Global Inc [Member]	Sep. 30, 2014 Occupational Health and Safety (OHS) [Member]
Date of Spinoff				9/30/2014
Date of record for ADP stockholders to receive Disposal Entity's shares				September 24, 2014
ADP share to be converted to Disposal Entity's Shares					$ 1
Common stock, par value	$ 0.10		$ 0.10	$ 0.01
Disposal Entity's shares converted from Parent shares					$ 3
Shares Distributed of Disposal Entity's common stock				160.6
Reduction in retained earnings due to net assets				$ 1,500,000,000
Dividend received from Disposal Entity	825,000,000	0		825,000,000
Separation Costs, Incurred Cost				42,800,000
Disposal Date						Feb. 28, 2014
Gain (Loss) from Disposal from Disposal Entity						15,600,000
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax [Abstract]
Revenues	508,900,000	477,600,000
Earnings from discontinued operations before income taxes	65,600,000	93,700,000
Provision for income taxes	68,400,000	30,000,000
Net (loss)/earnings from discontinued operations	(2,800,000)	63,700,000
Assets:
Cash	0	309,000,000	397,700,000
Accounts receivable, net			296,700,000
Property, plant and equipment, net			109,700,000
Goodwill			1,226,600,000
Intangible assets, net			133,500,000
Other assets			245,500,000
Total assets	0		2,409,700,000
Liabilities:
Accounts payable			17,200,000
Accrued expenses and other current liabilities			128,100,000
Accrued payroll and payroll related expenses			99,200,000
Deferred revenues			218,200,000
Deferred income taxes			70,800,000
Other liabilities			47,700,000
Total liabilities	$ 0		$ 581,200,000