Cash payments received representing purchase price adjustments

Name:	adp_CashRecievedFromPurchasePriceAdjustments
Namespace Prefix:	adp
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Discontinued Operations Change In Professional Fee Incurred In Disposition

+ Details

Name:	adp_DiscontinuedOperationsChangeInProfessionalFeeIncurredInDisposition
Namespace Prefix:	adp
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Charges recorded in discontinued operations resulting from a change in estimated taxes, net of taxes.

+ Details

Name:	adp_DiscontinuedOperationsChargeResultingFromChangeOfEstimateIncomeTax
Namespace Prefix:	adp
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Discontinued Operations, Net Charge

+ Details

Name:	adp_DiscontinuedOperationsNetCharge
Namespace Prefix:	adp
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Net Gain Recorded In Discontinued Operations Resulting From Change In Professional Fees Incurred In Connection With Divestiture Of Businesses

+ Details

Name:	adp_NetGainRecordedInDiscontinuedOperationsResultingFromChangeInProfessionalFeesIncurredInConnectionWithDivestitureOfBusinesses
Namespace Prefix:	adp
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Pretax gain (loss), not previously recognized and resulting from the sale of a business component, which is recognized at the date of sale. A gain (loss) reflects the amount by which the consideration received exceeds (is exceeded by) the net carrying amount (reflecting previous provisions for loss on disposal, if any) of the disposal group.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 43
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 144
-Paragraph 47
-Subparagraph b
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760

+ Details

Name:	us-gaap_DiscontinuedOperationGainLossFromDisposalOfDiscontinuedOperationBeforeIncomeTax
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Gain (loss) after tax expense or benefit, not previously recognized and resulting from the sale of a business component, which is recognized at the date of sale. A gain (loss) reflects the amount by which the consideration received exceeds (is exceeded by) the net carrying amount (reflecting previous provisions for loss on disposal, if any) of the disposal group.

+ References

+ Details

Name:	us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This element represents the cash inflow during the period from the sale of a component of the entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 15, 16
-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Investing Activities
-URI http://asc.fasb.org/extlink&oid=6516133

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585

+ Details

Name:	us-gaap_ProceedsFromDivestitureOfBusinessesNetOfCashDivested
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Divestitures (Narrative) (Details) (USD $) In Millions	12 Months Ended		0 Months Ended	12 Months Ended	1 Months Ended		12 Months Ended
Divestitures (Narrative) (Details) (USD $) In Millions	Jun. 30, 2010	Jun. 30, 2009	Mar. 24, 2010 Non-Core Commercial Systems Business [Member]	Jun. 30, 2010 Non-Core Commercial Systems Business [Member]	Apr. 30, 2009 Sandy Corporation [Member]	Mar. 31, 2008 Sandy Corporation [Member]	Jun. 30, 2009 Sandy Corporation [Member]	Jun. 30, 2008 Sandy Corporation [Member]
Sale price of business			$ 21.6
Gain from discontinued operations recorded in earnings, before tax				5.6			2.5	2.5
Gain on disposal of discontinued business, net of tax	0.5	4.4		1.0			1.6	1.6
Net charges recorded in discontinued operations resulting from a change in estimated taxes	0.8	2.6
Net gain recorded in discontinued operations	0.5	2.8
Professional fees incurred in connection with the divestiture of the business	0.3
Net gain recorded in discontinued operations resulting from change in professional fees		0.2
Cash payments received representing purchase price adjustments					$ 2.5	$ 2.5