Divestiture - Narrative (Details) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	6 Months Ended		3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Jun. 30, 2014	Sep. 24, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Common stock, par value	$ 0.10		$ 0.10	$ 0.10
Dividend received from Disposal Entity	$ 825,000,000	$ 0
CDK Global Inc [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
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	$ 0.01		$ 0.01
Disposal Entity's shares converted from Parent shares					$ 3
Shares Distributed of Disposal Entity's common stock	160.6		160.6
Reduction in retained earnings due to net assets	1,500,000,000
Dividend received from Disposal Entity	825,000,000
Separation Costs, Incurred Cost	(45,300,000)		(2,500,000)
Occupational Health and Safety (OHS) [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Date	Feb. 28, 2014
Gain (Loss) from Disposal from Disposal Entity	$ 15,600,000