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Subsequent Events (Details) (Subsequent Event [Member])	Apr. 10, 2014
Subsequent Event [Member]
Subsequent Event [Line Items]
Spin off Percentage	100.00%

The percentage of Dealer Services business to be included in the tax free spin off

No definition available.

Name:	adp_SpinoffPercentage
Namespace Prefix:	adp_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration