Assets Held-for-Sale (Details)	3 Months Ended
Sep. 30, 2012 property
Assets Held for Sale [Abstract]
Number of buildings reclassified as held-for-sale	2

Number of buildings reclassified as available for sale.

No definition available.

Name:	adp_NumberOfBuildingsReclassifiedAsAvailableForSale
Namespace Prefix:	adp_
Data Type:	xbrli:positiveIntegerItemType
Balance Type:	na
Period Type:	duration