Automatic Data Processing (ADP) 10-Q 1 Nov 13 2014 Q1 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	3 Months Ended
	Sep. 30, 2013	Oct. 29, 2013
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Sep-13	'
Entity Registrant Name	'AUTOMATIC DATA PROCESSING INC	'
Entity Central Index Key	'0000008670	'
Current Fiscal Year End Date	'--06-30	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q1	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	481,425,397

Statements_Of_Consolidated_Ear

Statements Of Consolidated Earnings (USD $)	3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012
REVENUES:	'		'
Revenues, other than interest on funds held for clients and PEO revenues	$2,248.50		$2,081.80
Interest on funds held for clients	89.2		106.8
PEO revenues	501.9	[1]	448.9	[1]
TOTAL REVENUES	2,839.60		2,637.50
EXPENSES:	'		'
Operating expenses	1,491.60		1,367.50
Systems development and programming costs	171.8		156.3
Depreciation and amortization	61		62.7
TOTAL COSTS OF REVENUES	1,724.40		1,586.50
Selling, general and administrative expenses	638.6		611.4
Interest expense	1.9		3.1
TOTAL EXPENSES	2,364.90		2,201
Other income, net	-22.6		-29.1
EARNINGS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	497.3		465.6
Provision for income taxes	168.7		163.1
NET EARNINGS FROM CONTINUING OPERATIONS	328.6		302.5
EARNINGS FROM DISCONTINUED OPERATIONS BEFORE INCOME TAXES	0		4.5
Provision for Income Taxes	0		1.7
NET EARNINGS FROM DISCONTINUED OPERATIONS	0		2.8
NET EARNINGS	$328.60		$305.30
Basic Earnings Per Share from Continuing Operations	$0.68		$0.63
Basic Earnings Per Share from Discontinued Operations	$0		$0.01
BASIC EARNINGS PER SHARE	$0.68		$0.63
Diluted Earnings Per Share from Continuing Operations	$0.68		$0.62
Diluted Earnings Per Share from Discontinued Operations	$0		$0.01
DILUTED EARNINGS PER SHARE	$0.68		$0.63
Basic weighted average shares outstanding	480.1		483.5
Diluted weighted average shares outstanding	484.3		488.4
Dividends declared per common share	$0.44		$0.40
[1]	Professional Employer Organization (“PEO”) revenues are net of direct pass-through costs, primarily consisting of payroll wages and payroll taxes, of $4,947.2 million and $4,525.8 million for the three months ended September 30, 2013 and 2012, respectively.

Statements_Of_Consolidated_Ear1

Statements Of Consolidated Earnings (Parenthetical) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Income Statement [Abstract]	'	'
Direct pass-through costs, Professional Employer Organization revenues	$4,947.20	$4,525.80

Statements_of_Consolidated_Com

Statements of Consolidated Comprehensive Income (USD $)	3 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Consolidated Statement of Comprehensive Income [Abstract]	'	'
NET EARNINGS	$328.60	$305.30
Other comprensive income:	'	'
Currency translation adjustments	43.3	52.5
Unrealized net gains on available-for-sale securities	14.8	100
Tax Effect	-5	-35
Reclassification of net (gains) on available-for-sale securities to net earnings	-3.5	-4.5
Tax effect	-1.3	-1.2
Reclassification of pension liability adjustment to net earnings	5.1	7.9
Tax effect	-0.9	-2.9
Other Comprehensive (loss)/income, net of tax	55.1	119.2
Comprehensive income	$383.70	$424.50

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Sep. 30, 2013		Jun. 30, 2013
In Millions, unless otherwise specified
Assets	'		'
Cash and cash equivalents	$1,149	[1]	$1,699.10	[1]
Short-term marketable securities	541.9	[1],[2]	28
Accounts receivable, net	1,585.80		1,598.30
Other current assets	823.2		646.8
Total current assets before funds held for clients	4,099.90		3,972.20
Funds held for clients	16,935.90		22,228.80
Total current assets	21,035.80		26,201
Long-term marketable securities	2,549	[1],[2]	314	[1]
Long-term receivables, net	140		138.7
Property, Plant and Equipment, Net	735.2		728.7
Other assets	1,286.50		1,189.90
Goodwill	3,095.70	[3]	3,052.60	[3]
Intangible assets, net	639.1		643.2
Total assets	29,481.30		32,268.10
Liabilities	'		'
Accounts payable	148.9		157.3
Accrued expenses and other current liabilities	1,169.70		1,178.60
Accrued payroll and payroll-related expenses	438		632.1
Dividends payable	205.6		206.7
Short-term deferred revenues	302.9		316.4
Obligations under reverse repurchase agreements	340.9		245.9
Obligation under commercial paper borrowing	2,477		0
Income taxes payable	98.4		39.5
Total current liabilities before client funds obligations	5,181.40		2,776.50
Client funds obligations	16,718		21,956.30
Total current liabilities	21,899.40		24,732.80
Long-term debt	14.2		14.7
Other liabilities	612.7		603.1
Deferred income taxes	271.5		234.4
Long-term deferred revenues	490.7		493.2
Total liabilities	23,288.50		26,078.20
Stockholders' equity:	'		'
Preferred stock, $1.00 par value: Authorized, 0.3 shares; issued, none	0		0
Common stock, $0.10 par value: Authorized, 1,000.0 shares; issued 638.7 shares at September 30, 2013 and June 30, 2013; outstanding, 481.8 and 482.6 shares at September 30, 2013 and June 30, 2013, respectively	63.9		63.9
Capital in excess of par value	436.8		456.9
Retained earnings	13,139.30		13,020.30
Treasury stock - at cost: 156.9 and 156.1 shares at September 30, 2013 and June 30, 2013, respectively	-7,517.70		-7,366.60
Accumulated other comprehensive income	70.5		15.4
Total stockholders' equity	6,192.80		6,189.90
Total liabilities and stockholders' equity	$29,481.30		$32,268.10
[1]	As of September 30, 2013, $234.0 million of long-term marketable securities, $103.6 million of short-term marketable securities, and $3.3 million of cash and cash equivalents have been pledged as collateral under the Company's reverse repurchase agreements (see Note 10). As of June 30, 2013, $245.2 million of long-term marketable securities and $0.7 million of cash and cash equivalents have been pledged as collateral under the Company's reverse repurchase agreements (see Note 10).
[2]	As of September 30, 2013, $2,132.4 million of long-term marketable securities and $407.6 million of short-term marketable securities are related to the Company's outstanding commercial paper borrowing (see Note 10).
[3]	The goodwill balance at June 30, 2013 and September 30, 2013 is net of accumulated impairment losses of $42.7 million related to the Employer Services segment.

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2013	Jun. 30, 2013
In Millions, except Share data, unless otherwise specified
Preferred stock, par value	$1	$1
Preferred stock, shares authorized	300,000	300,000
Preferred stock, shares issued	0	0
Common stock, par value	$0.10	$0.10
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	638,700,000	638,700,000
Common stock, shares outstanding	481,800,000	482,600,000
Treasury stock, shares	156,900,000	156,100,000
Cash [Member]	'	'
Collateral Pledged on Reverse Repurchase Agreements Segregated under Securities Exchange Commission Regulation	$3.30	$0.70
Long [Member]	'	'
Collateral Pledged on Reverse Repurchase Agreements Segregated under Securities Exchange Commission Regulation	234	245.2
Short-term Investments [Member]	'	'
Collateral Pledged on Reverse Repurchase Agreements Segregated under Securities Exchange Commission Regulation	103.6	'
Short-term Investments [Member]	'	'
Assets related to the Company's outstanding commercial paper	407.6	'
Long [Member]	'	'
Assets related to the Company's outstanding commercial paper	$2,132.40	'

Statements_Of_Consolidated_Cas

Statements Of Consolidated Cash Flows (USD $)	3 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012
Statement of Cash Flows [Abstract]	'		'
NET EARNINGS	$328.60		$305.30
Adjustments to reconcile net earnings to cash flows provided by operating activities:	'		'
Depreciation and amortization	80.5		78.3
Deferred income taxes	18.7		7.1
Stock-based compensation expense	27.2		21
Net pension expense	7.4		10.9
Net realized gain from the sales of marketable securities	-3.5		-4.5
Net amortization of premiums and accretion of discounts on available-for-sale securities	22.8		18.7
Other	-24.4		9.7
Changes in operating assets and liabilities, net of effects from acquisitions and divestitures of businesses:	'		'
Decrease/(increase)in accounts receivable	12.2		-73.4
Increase in other assets	-290		-330.5
Decrease in accounts payable	-11.6		-31.4
Decrease/(increase) in accrued expenses and other liabilities	-86.6		-76.4
Operating activities of discontinued operations	0		0.1
Net cash flows provided by (used in) operating activities	81.3		-65.1
Cash Flows from Investing Activities:	'		'
Purchases of corporate and client funds marketable securities	-369.1		-765.5
Proceeds from the sales and maturities of corporate and client funds marketable securities	571.6		602.5
Net decrease in restricted cash and cash equivalents held to satisfy client funds obligations	2,390.50		943.6
Capital expenditures	-46.4		-30.5
Additions to intangibles	-32.8		-33.5
Acquisitions of businesses, net of cash acquired	-9.7		-0.7
Net cash flows provided by investing activities	2,504.10		715.9
Cash Flows from Financing Activities:	'		'
Net decrease in client funds obligations	-5,295		-1,220.40
Payments of debt	-0.6		-8.2
Repurchases of common stock	-303		-194.5
Proceeds from stock purchase plan and exercises of stock options	61.2		80.2
Dividends paid	-210.6		-192.1
Net proceeds from reverse repurchase agreements	98.7		441.7
Net proceeds from issuance of commercial paper	2,477		0
Other	34.8		0
Net cash flows used in financing activities	-3,137.50		-1,093.30
Effect of exchange rate changes on cash and cash equivalents	2		11.8
Net change in cash and cash equivalents	-550.1		-430.7
Cash and cash equivalents of continuing operations, beginning of period	1,699.10	[1]	1,548.10
Cash and cash equivalents of continuing operations, end of period	$1,149	[1]	$1,117.40
[1]	As of September 30, 2013, $234.0 million of long-term marketable securities, $103.6 million of short-term marketable securities, and $3.3 million of cash and cash equivalents have been pledged as collateral under the Company's reverse repurchase agreements (see Note 10). As of June 30, 2013, $245.2 million of long-term marketable securities and $0.7 million of cash and cash equivalents have been pledged as collateral under the Company's reverse repurchase agreements (see Note 10).

Basis_of_Presentation_Notes

Basis of Presentation (Notes)	3 Months Ended
	Sep. 30, 2013
Basis of Presentation [Abstract]	'
Basis of Presentation	'
	Note 1.  Basis of Presentation
	The accompanying Consolidated Financial Statements and footnotes thereto of Automatic Data Processing, Inc. and its subsidiaries (“ADP” or the “Company”) have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”).  The Consolidated Financial Statements and footnotes thereto are unaudited.  In the opinion of the Company’s management, the Consolidated Financial Statements reflect all adjustments, which are of a normal recurring nature, that are necessary for a fair statement of the Company’s results for the interim periods.
	The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the assets, liabilities, revenue, expenses, and other comprehensive income that are reported in the Consolidated Financial Statements and footnotes thereto.  Actual results may differ from those estimates. All relevant footnotes have been adjusted for discontinued operations.
	Interim financial results are not necessarily indicative of financial results for a full year.  The information included in this Quarterly Report on Form 10-Q should be read in conjunction with the Company’s Annual Report on Form 10-K for the fiscal year ended June 30, 2013 (“fiscal 2013”).
	Certain prior period amounts have been reclassified to conform to the current-period presentation (see Note 16). These changes did not significantly affect reportable segment results.

New_Accounting_Pronouncements_

New Accounting Pronouncements (Notes)	3 Months Ended
	Sep. 30, 2013
Accounting Changes and Error Corrections [Abstract]	'
New Accounting Pronouncements	'
	Note 2.  New Accounting Pronouncements
	In July 2013, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2013-11, “Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists.” ASU 2013-11 requires netting of unrecognized tax benefits against a deferred tax asset for a loss or other carryforward that would apply in settlement of the uncertain tax position. ASU 2013-11 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2013. Retrospective adoption is permitted. The adoption of ASU 2013-11 will not have a material impact on the Company's results of operations, financial condition, or cash flows.
	In July 2013, the Company adopted ASU 2013-02, “Comprehensive Income (Topic 220): Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income.”  ASU 2013-02 requires entities to disclose the amount of income (loss) reclassified out of accumulated other comprehensive income to each respective line item on the income statement. The guidance allows companies to elect whether to disclose the reclassification either on the face of the income statement or in the notes to the financial statements, including cross-referencing other disclosures which provide additional details about these amounts. The Company has elected to disclose the reclassification in the notes to the financial statements with cross-references to other disclosures which provide additional details about the amounts. The adoption of ASU 2013-02 did not have an impact on the Company's consolidated results of operations, financial condition, or cash flows.

Earnings_per_Share_Notes

Earnings per Share (Notes)	3 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share [Text Block]	'
	Note 3.  Earnings per Share (“EPS”)
		Basic		Effect of Employee Stock Option Shares	Effect of	Diluted
					Employee
					Restricted
					Stock
					Shares
	Three months ended September 30,
	2013
	Net earnings from continuing operations	$	328.6			$	328.6
	Weighted average shares (in millions)	480.1		3.1	1.2	484.3
	EPS from continuing operations	$	0.68			$	0.68
	2012
	Net earnings from continuing operations	$	302.5			$	302.5
	Weighted average shares (in millions)	483.5		3.6	1.3	488.4
	EPS from continuing operations	$	0.63			$	0.62
	Options to purchase 0.1 million and 0.9 million shares of common stock for the three months ended September 30, 2013 and 2012, respectively, were excluded from the calculation of diluted earnings per share because their exercise prices exceeded the average market price of outstanding common shares for the respective periods.

Other_Income_net

Other Income, net	3 Months Ended
	Sep. 30, 2013
Other Income, Net [Abstract]	'
Other Income, net	'
	Note 4. Other Income, Net
		Three Months Ended
		September 30,
		2013			2012
	Interest income on corporate funds	$	(19.0	)	$	(23.8	)
	Realized gains on available-for-sale securities	(4.3		)	(4.9		)
	Realized losses on available-for-sale securities	0.8			0.4
	Other, net	(0.1		)	(0.8		)
	Other income, net	$	(22.6	)	$	(29.1	)

Acquisitions

Acquisitions	3 Months Ended
	Sep. 30, 2013
Acquisitions [Abstract]	'
Acquisitions	'
	Note 5. Acquisitions
	Assets acquired and liabilities assumed in business combinations were recorded on the Company’s Consolidated Balance Sheets as of the respective acquisition dates based upon their estimated fair values at such dates.  The results of operations of businesses acquired by the Company have been included in the Statements of Consolidated Earnings since their respective dates of acquisition.  The excess of the purchase price over the estimated fair values of the underlying assets acquired and liabilities assumed was allocated to goodwill.  In certain circumstances, the allocations of the excess purchase price are based upon preliminary estimates and assumptions and subject to revision when the Company receives final information, including appraisals and other analysis.  Accordingly, the measurement period for such purchase price allocations will end when the information, or the facts and circumstances, becomes available, but will not exceed twelve months.
	The Company acquired one business during the three months ended September 30, 2013 for approximately $12.5 million, net of cash acquired. The acquisition was not material to the Company's results of operations, financial position, or cash flows.
	The Company did not acquire any businesses during the three months ended September 30, 2012.
	The Company made contingent payments relating to previously consummated acquisitions of $0.5 million during the three months ended September 30, 2012.

Divestiture

Divestiture	3 Months Ended
	Sep. 30, 2013
Divestitures [Abstract]	'
Divestiture	'
	Note 6. Divestitures
	On December 17, 2012, the Company completed the sale of its Taxware Enterprise Service business ("Taxware") for a pre-tax gain of $58.8 million, less costs to sell. In connection with the disposal of Taxware, the Company classified the results of this business as discontinued operations for the three months ended September 30, 2012. Taxware was previously reported in the Employer Services segment.
	Operating results for discontinued operations were as follows:
		Three Months Ended
		September 30,
		2012
	Revenues	$	12.9
	Earnings from discontinued operations before income taxes	4.5
	Provision for income taxes	1.7
	Net earnings from discontinued operations	$	2.8
	There were no assets or liabilities of discontinued operations as of September 30, 2013 or June 30, 2013.

Corporate_Investments_And_Fund

Corporate Investments And Funds Held For Clients	3 Months Ended
	Sep. 30, 2013
Corporate Investments And Funds Held For Clients [Abstract]	'
Corporate Investments And Funds Held For Clients	'
	Note 7. Corporate Investments and Funds Held for Clients
	Corporate investments and funds held for clients at September 30, 2013 and June 30, 2013 were as follows:
		September 30, 2013
		Amortized			Gross			Gross			Fair Value (A)
		Cost			Unrealized			Unrealized
					Gains			Losses
	Type of issue:
	Money market securities and other cash equivalents	$	2,498.00		$	—		$	—		$	2,498.00
	Available-for-sale securities:
	Corporate bonds	7,719.60			166.4			(42.9		)	7,843.10
	U.S. Treasury and direct obligations of	5,983.30			142.5			(32.6		)	6,093.20
	U.S. government agencies
	Asset-backed securities	1,351.80			4.7			(14.3		)	1,342.20
	Canadian government obligations and	1,024.70			10			(3.6		)	1,031.10
	Canadian government agency obligations
	Canadian provincial bonds	702.5			20.3			(5.1		)	717.7
	Municipal bonds	526.9			16.7			(3.6		)	540
	Other securities	1,070.30			42.4			(2.2		)	1,110.50
	Total available-for-sale securities	18,379.10			403			(104.3		)	18,677.80
	Total corporate investments and funds held for clients	$	20,877.10		$	403		$	(104.3	)	$	21,175.80
	(A) Included within available-for-sale securities are corporate investments with fair values of $3,090.9 million and funds held for clients with fair values of $15,586.9 million. At September 30, 2013, Level 1 securities included $8.0 million of corporate investments classified within "Other securities." All remaining available-for-sale securities were included in Level 2.
		June 30, 2013
		Amortized			Gross			Gross			Fair Value (B)
		Cost			Unrealized			Unrealized
					Gains			Losses
	Type of issue:
	Money market securities and other cash equivalents	$	5,431.20		$	—		$	—		$	5,431.20
	Available-for-sale securities:
	Corporate bonds	7,868.30			166.2			(56.7		)	7,977.80
	U.S. Treasury and direct obligations of	5,983.70			152.6			(37.4		)	6,098.90
	U.S. government agencies
	Asset-backed securities	1,374.10			5.3			(19.7		)	1,359.70
	Canadian government obligations and	998.2			10.7			(4.5		)	1,004.40
	Canadian government agency obligations
	Canadian provincial bonds	695.7			20.7			(5.6		)	710.8
	Municipal bonds	536.9			16.7			(4.4		)	549.2
	Other securities	1,094.40			46.3			(2.8		)	1,137.90
	Total available-for-sale securities	18,551.30			418.5			(131.1		)	18,838.70
	Total corporate investments and funds held for clients	$	23,982.50		$	418.5		$	(131.1	)	$	24,269.90
	(B) Included within available-for-sale securities are corporate investments with fair values of $342.0 million and funds held for clients with fair values of $18,496.7 million. At June 30, 2013, Level 1 securities included $9.5 million of corporate investments classified within "Other securities." All remaining available-for-sale securities were included in Level 2.
	For a description of the fair value hierarchy and the Company's fair value methodologies, including the use of an independent third-party pricing service, see Note 1 "Summary of Significant Accounting Policies" in the Company's Annual Report on Form 10-K for fiscal 2013. The Company did not transfer any assets between Level 1 and Level 2 during the quarter ended September 30, 2013, or the year ended June 30, 2013. In addition, the Company did not adjust the prices obtained from the independent pricing service. The Company has no available-for-sale securities included in Level 3.
	The unrealized losses and fair values of available-for-sale securities that have been in an unrealized loss position for a period of less than and greater than 12 months as of September 30, 2013, are as follows:
		September 30, 2013
		Unrealized			Fair market			Unrealized			Fair market		Total gross			Total fair
		losses			value less than			losses			value greater		unrealized			market value
		less than			12 months			greater than			than 12 months		losses
		12 months						12 months
	Corporate bonds	$	(41.7	)	$	2,224.30		$	(1.2	)	$	15.3	$	(42.9	)	$	2,239.60
	U.S. Treasury and direct obligations of	(32.6		)	1,361.70			—			—		(32.6		)	1,361.70
	U.S. government agencies
	Asset-backed securities	(14.3		)	1,001.90			—			—		(14.3		)	1,001.90
	Canadian government obligations and	(3.6		)	456.8			—			—		(3.6		)	456.8
	Canadian government agency obligations
	Canadian provincial bonds	(5.1		)	240.8			—			—		(5.1		)	240.8
	Municipal bonds	(3.6		)	155			—			0.8		(3.6		)	155.8
	Other securities	(2.2		)	89.1			—			—		(2.2		)	89.1
		$	(103.1	)	$	5,529.60		$	(1.2	)	$	16.1	$	(104.3	)	$	5,545.70
	The unrealized losses and fair values of available-for-sale securities that have been in an unrealized loss position for a period of less than and greater than 12 months as of June 30, 2013 are as follows:
		30-Jun-13
		Unrealized			Fair market			Unrealized			Fair market		Total gross			Total fair
		losses			value less than			losses			value greater		unrealized			market value
		less than			12 months			greater than			than 12 months		losses
		12 months						12 months
Corporate bonds	$	(56.7	)	$	2,724.90		$	—		$	—	$	(56.7	)	$	2,724.90
U.S. Treasury and direct obligations of U.S. government agencies	(37.4		)	1,374.60			—			—		(37.4		)	1,374.60
Asset-backed securities	(19.7		)	1,060.10			—			—		(19.7		)	1,060.10
Canadian government obligations and	(4.5		)	444.7			—			—		(4.5		)	444.7
Canadian government agency obligations
Canadian provincial bonds	(5.6		)	239.7			—			—		(5.6		)	239.7
Municipal bonds	(4.4		)	188.7			—			—		(4.4		)	188.7
Other securities	(2.8		)	109.3			—			—		(2.8		)	109.3
	$	(131.1	)	$	6,142.00		$	—		$	—	$	(131.1	)	$	6,142.00
At September 30, 2013, Corporate bonds included within total corporate investments and funds held for clients comprised investment-grade debt securities, which include a wide variety of issuers, industries, and sectors, primarily carry credit ratings of A and above, and have maturities ranging from October 2013 to June 2023. U.S. Treasury and direct obligations of U.S. government agencies primarily include debt directly issued by Federal Home Loan Banks and Federal Farm Credit Banks with fair values of $4,390.7 million and $1,228.5 million, respectively.  At June 30, 2013, U.S. Treasury and direct obligations of U. S. government agencies primarily include debt directly issued by Federal Home Loan Banks and Federal Farm Credit Banks with fair values of $4,325.4 million and $1,229.0 million, respectively.  U.S. Treasury and direct obligations of U.S. government agencies represent senior, unsecured, non-callable debt that primarily carries a credit rating of Aaa, as rated by Moody's, and AA+, as rated by Standard & Poor's, and has maturities ranging from October 2013 through May 2023.
At September 30, 2013, asset-backed securities include AAA rated senior tranches of securities with predominately prime collateral of fixed rate credit card, auto loan, and rate reduction receivables with fair values of $898.0 million, $313.1 million, and $86.8 million, respectively.  At June 30, 2013, asset-backed securities include AAA rated senior tranches of securities with predominately prime collateral of fixed rate credit card, auto loan, and rate reduction receivables with fair values of $904.5 million, $315.7 million, and $95.4 million, respectively.  These securities are collateralized by the cash flows of the underlying pools of receivables.  The primary risk associated with these securities is the collection risk of the underlying receivables.  All collateral on such asset-backed securities has performed as expected through September 30, 2013.
At September 30, 2013, other securities and their fair value primarily represent: AA and AAA rated supranational bonds of $434.6 million, AA and AAA rated sovereign bonds of $417.3 million, AAA rated commercial mortgage-backed securities of $136.9 million, and AA rated mortgage-backed securities of $103.9 million that are guaranteed by Federal National Mortgage Association ("Fannie Mae") or Federal Home Loan Mortgage Corporation ("Freddie Mac"). At June 30, 2013, other securities and their fair value primarily represent: AA and AAA rated supranational bonds of $426.9 million, AA and AAA rated sovereign bonds of $415.4 million, AAA rated commercial mortgage-backed securities of $163.5 million, and AA rated mortgage-backed securities of $112.6 million that are guaranteed by Fannie Mae or Freddie Mac. The Company's mortgage-backed securities represent an undivided beneficial ownership interest in a group or pool of one or more residential mortgages. These securities are collateralized by the cash flows of 15-year and 30-year residential mortgages and are guaranteed by Fannie Mae or Freddie Mac as to the timely payment of principal and interest.
Classification of corporate investments on the Consolidated Balance Sheets is as follows:
		September 30,			June 30,
		2013			2013
Corporate investments:
Cash and cash equivalents		$	1,149.00		$	1,699.10
Short-term marketable securities		541.9			28
Long-term marketable securities		2,549.00			314
Total corporate investments		$	4,239.90		$	2,041.10
Funds held for clients represent assets that, based upon the Company's intent, are restricted for use solely for the purposes of satisfying the obligations to remit funds relating to the Company’s payroll and payroll tax filing services, which are classified as client funds obligations on our Consolidated Balance Sheets.
Funds held for clients have been invested in the following categories:
		September 30,			June 30,
		2013			2013
Funds held for clients:
Restricted cash and cash equivalents held to satisfy client funds obligations		$	1,349.00		$	3,732.10
Restricted short-term marketable securities held to satisfy client funds obligations		928			1,407.70
Restricted long-term marketable securities held to satisfy client funds obligations		14,658.90			17,089.00
Total funds held for clients		$	16,935.90		$	22,228.80
Client funds obligations represent the Company's contractual obligations to remit funds to satisfy clients' payroll and tax payment obligations and are recorded on the Consolidated Balance Sheets at the time that the Company impounds funds from clients.  The client funds obligations represent liabilities that will be repaid within one year of the balance sheet date.  The Company has reported client funds obligations as a current liability on the Consolidated Balance Sheets totaling $16,718.0 million and $21,956.3 million as of September 30, 2013 and June 30, 2013, respectively.  The Company has classified funds held for clients as a current asset since these funds are held solely for the purposes of satisfying the client funds obligations.  The Company has reported the cash flows related to the purchases of corporate and client funds marketable securities and related to the proceeds from the sales and maturities of corporate and client funds marketable securities on a gross basis in the investing section of the Statements of Consolidated Cash Flows.  The Company has reported the cash inflows and outflows related to client funds investments with original maturities of 90 days or less on a net basis within net increase in restricted cash and cash equivalents and other restricted assets held to satisfy client funds obligations in the investing section of the Statements of Consolidated Cash Flows.  The Company has reported the cash flows related to the cash received from and paid on behalf of clients on a net basis within net decrease in client funds obligations in the financing activities section of the Statements of Consolidated Cash Flows.
Approximately 84% of the available-for-sale securities held a AAA or AA rating at September 30, 2013, as rated by Moody's, Standard & Poor's and, for Canadian securities, Dominion Bond Rating Service.  All available-for-sale securities were rated as investment grade at September 30, 2013.
Expected maturities of available-for-sale securities at September 30, 2013 are as follows:
One year or less	$	1,469.90
One year to two years	4,105.80
Two years to three years	4,414.80
Three years to four years	3,162.30
After four years	5,525.00
Total available-for-sale securities	$	18,677.80

Receivables

Receivables	3 Months Ended
	Sep. 30, 2013
Accounts, Notes, Loans and Financing Receivable, Classified [Abstract]	'
Receivables	'
	Note 8. Receivables
	Accounts receivable, net, includes the Company's trade receivables, which are recorded based upon the amount the Company expects to receive from its clients, net of an allowance for doubtful accounts. The Company's receivables also include notes receivable for the financing of the sale of computer systems, primarily from auto, truck, motorcycle, marine, recreational vehicle, and heavy equipment retailers and manufacturers. Notes receivable are recorded based upon the amount the Company expects to receive from its clients, net of an allowance for doubtful accounts and unearned income. The allowance for doubtful accounts is the Company's best estimate of probable credit losses related to trade receivables and notes receivable based upon the aging of the receivables, historical collection data, internal assessments of credit quality, and the economic conditions in the automobile industry as well as in the economy as a whole. The Company charges off uncollectable amounts against the reserve in the period in which it determines they are uncollectable. Unearned income on notes receivable is amortized using the effective interest method.
	The Company’s receivables, whose carrying value approximates fair value, are as follows:
		September 30, 2013						June 30, 2013
		Current			Long-term			Current			Long-term
	Trade receivables	$	1,558.20		$	—		$	1,564.80		$	—
	Notes receivable	90.5			156.2			91			154.7
	Less:
	Allowance for doubtful accounts - trade receivables	(50.9		)	—			(45.6		)	—
	Allowance for doubtful accounts - notes receivable	(5.6		)	(9.7		)	(5.3		)	(9.0		)
	Unearned income - notes receivable	(6.4		)	(6.5		)	(6.6		)	(7.0		)
		$	1,585.80		$	140		$	1,598.30		$	138.7
	The Company determines the allowance for doubtful accounts related to notes receivable based upon a specific reserve for known collection issues, as well as a non-specific reserve based upon aging, both of which are based upon history of such losses and current economic conditions. Based upon the Company's methodology, the notes receivable balances with specific and non-specific reserves and the specific and non-specific reserves associated with those balances are as follows:
		September 30, 2013
		Notes Receivable						Reserve
		Current			Long-term			Current			Long-term
	Specific reserve	$	0.3		$	0.5		$	0.3		$	0.5
	Non-specific reserve	90.2			155.7			5.3			9.2
		$	90.5		$	156.2		$	5.6		$	9.7
		June 30, 2013
		Notes Receivable						Reserve
		Current			Long-term			Current			Long-term
	Specific reserve	$	0.3		$	0.5		$	0.3		$	0.5
	Non-specific reserve	90.7			154.2			5			8.5
		$	91		$	154.7		$	5.3		$	9
	The rollforward of the allowance for doubtful accounts related to notes receivable is as follows:
		Current			Long-term
	Balance at June 30, 2013	$	5.3		$	9
	Incremental provision	0.4			0.6
	Recoveries and other	—			0.3
	Chargeoffs	(0.1		)	(0.2		)
	Balance at September 30, 2013	$	5.6		$	9.7
	The allowance for doubtful accounts as a percentage of notes receivable was approximately 6% as of September 30, 2013 and June 30, 2013.
	On an ongoing basis, the Company evaluates the credit quality of its financing receivables, utilizing aging of receivables, collection experience and charge-offs.  In addition, the Company evaluates economic conditions in the auto industry and specific dealership matters, such as bankruptcy.  As events related to a specific client dictate, the credit quality of a client is reevaluated. Approximately 99% and 100% of notes receivable were current at September 30, 2013 and June 30, 2013, respectively.

Goodwill_And_Intangible_Assets

Goodwill And Intangible Assets, Net	3 Months Ended
	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill And Intangible Assets, Net	'
	Note 9. Goodwill and Intangibles Assets, net
	Changes in goodwill for the three months ended September 30, 2013 are as follows:
		Employer				PEO				Dealer		Total
		Services				Services				Services
	Balance at June 30, 2013 (A)	$	1,878.80			$	4.8			$	1,169.00	$	3,052.60
	Additions and other adjustments, net	1				—				11.1		12.1
	Currency translation adjustments	23.9				—				7.1		31
	Balance at September 30, 2013 (A)	$	1,903.70			$	4.8			$	1,187.20	$	3,095.70
	(A) The goodwill balance at June 30, 2013 and September 30, 2013 is net of accumulated impairment losses of $42.7 million related to the Employer Services segment.
	Components of intangible assets, net, are as follows:
			September 30,				June 30,
			2013				2013
	Intangible assets:
	Software and software licenses		$	1,545.80			$	1,511.10
	Customer contracts and lists		858.8				848.9
	Other intangibles		241.8				241.7
			2,646.40				2,601.70
	Less accumulated amortization:
	Software and software licenses		(1,267.0		)		(1,239.5		)
	Customer contracts and lists		(552.4		)		(534.3		)
	Other intangibles		(187.9		)		(184.7		)
			(2,007.3		)		(1,958.5		)
	Intangible assets, net		$	639.1			$	643.2
	Other intangibles consist primarily of purchased rights, covenants, patents, and trademarks (acquired directly or through acquisitions).  All of the intangible assets have finite lives and, as such, are subject to amortization.  The weighted average remaining useful life of the intangible assets is 7 years (4 years for software and software licenses, 10 years for customer contracts and lists, and 7 years for other intangibles).  Amortization of intangible assets was $41.5 million and $42.0 million for the three months ended September 30, 2013 and 2012, respectively.
	Estimated future amortization expenses of the Company's existing intangible assets are as follows:
		Amount
	Nine months ending June 30, 2014	$	123.4
	Twelve months ending June 30, 2015	$	136.9
	Twelve months ending June 30, 2016	$	99.5
	Twelve months ending June 30, 2017	$	71.6
	Twelve months ending June 30, 2018	$	46.2
	Twelve months ending June 30, 2019	$	32.1

ShortTerm_Financing

Short-Term Financing	3 Months Ended
	Sep. 30, 2013
Short-Term Financing [Abstract]	'
Short-Term Financing	'
	Note 10. Short-term Financing
	The Company has a $2.0 billion, 364-day credit agreement with a group of lenders that matures in June 2014.  In addition, the Company has a four-year $3.25 billion credit facility maturing in June 2015 that contains an accordion feature under which the aggregate commitment can be increased by $500.0 million, subject to the availability of additional commitments.  The Company also has an existing $2.0 billion five-year credit facility that matures in June 2018 that also contains an accordion feature under which the aggregate commitment can be increased by $500.0 million, subject to the availability of additional commitments.  The interest rate applicable to committed borrowings is tied to LIBOR, the federal funds effective rate, or the prime rate depending on the notification provided by the Company to the syndicated financial institutions prior to borrowing.  The Company is also required to pay facility fees on the credit agreements.  The primary uses of the credit facilities are to provide liquidity to the commercial paper program and funding for general corporate purposes, if necessary.  The Company had no borrowings through September 30, 2013 under the credit agreements.
	The Company’s U.S. short-term funding requirements related to client funds are sometimes obtained through a short-term commercial paper program, which provides for the issuance of up to $7.25 billion in aggregate maturity value of commercial paper, rather than liquidating previously-collected client funds that have already been invested in available-for-sale securities. The Company’s commercial paper program is rated A-1+ by Standard & Poor’s and Prime-1 by Moody’s.  These ratings denote the highest quality commercial paper securities.  Maturities of commercial paper can range from overnight to up to 364 days.  At September 30, 2013, the Company had $2.5 billion of commercial paper outstanding, which was subsequently repaid on October 2, 2013. At June 30, 2013, the Company had no commercial paper outstanding.  For the three months ended September 30, 2013 and 2012, the Company's average borrowings were $3.1 billion and $3.2 billion, respectively, at weighted average interest rates of 0.1% and 0.2%, respectively. The weighted average maturity of the Company’s commercial paper issued during three months ended September 30, 2013 approximated two days.
	The Company’s U.S. and Canadian short-term funding requirements related to client funds obligations are sometimes obtained on a secured basis through the use of reverse repurchase agreements, which are collateralized principally by government and government agency securities, rather than liquidating previously-collected client funds that have already been invested in available-for-sale securities.  These agreements generally have terms ranging from overnight to up to five business days.  The Company has $3.0 billion available to it on a committed basis under these reverse repurchase agreements. At September 30, 2013, the Company had $340.9 million of outstanding obligations related to reverse repurchase agreements, which were subsequently repaid on October 1, 2013. At June 30, 2013, the Company had $245.9 million of obligations outstanding related to reverse repurchase agreements, which were repaid on July 2, 2013. For the three months ended September 30, 2013 and 2012, the Company had average outstanding balances under reverse repurchase agreements of $529.4 million and $534.5 million, respectively, at weighted average interest rates of 0.5% and 0.7%, respectively.

Employee_Benefit_Plans

Employee Benefit Plans	3 Months Ended
	Sep. 30, 2013
Compensation and Retirement Disclosure [Abstract]	'
Employee Benefit Plans	'
	Note 11. Employee Benefit Plans
	A.  Stock-based Compensation Plans.
	Stock-based compensation consists of the following:
	•	Stock Options.  Stock options are granted to employees at exercise prices equal to the fair market value of the Company's common stock on the dates of grant.  Stock options are issued under a graded vesting schedule and have a term of 10 years.  Options granted prior to July 1, 2008 generally vest ratably over five years and options granted after July 1, 2008 generally vest ratably over four years.  Compensation expense is measured based on the fair value of the stock option on the grant date and recognized over the requisite service period for each separately vesting portion of the stock option award. Stock options are forfeited if the employee ceases to be employed by the Company prior to vesting.
	•	Restricted Stock.
	•	Time-Based Restricted Stock and Time-Based Restricted Stock Units. Time-based restricted stock and time-based restricted stock units granted prior to fiscal 2013 are subject to vesting periods of up to five years and awards granted in fiscal 2013 and later are subject to a vesting period of two years. Awards are forfeited if the employee ceases to be employed by the Company prior to vesting.
	Time-based restricted stock cannot be transferred during the vesting period. Compensation expense relating to the issuance of time-based restricted stock is measured based on the fair value of the award on the grant date and recognized on a straight-line basis over the vesting period. Employees are eligible to receive dividends on shares awarded under the time-based restricted stock program.
	Time-based restricted stock units are settled in cash. Compensation expense relating to the issuance of time-based restricted stock units is recorded over the vesting period and is initially based on the fair value of the award on the grant date; and is subsequently remeasured at each reporting date during the vesting period. No dividend equivalents are paid on units awarded under the time-based restricted stock unit program.
	•	Performance-Based Restricted Stock and Performance-Based Restricted Stock Units. Performance-based restricted stock and performance-based restricted stock units generally vest over a one to three year performance period and a subsequent service period of up to 26 months. Under these programs, the Company communicates "target awards" at the beginning of the performance period with possible payouts at the end of the performance period ranging from 0% to 150% of the "target awards." Awards are forfeited if the employee ceases to be employed by the Company prior to vesting.
	Performance-based restricted stock cannot be transferred during the vesting period. Compensation expense relating to the issuance of performance-based restricted stock is measured based upon the fair value of the award on the grant date and recognized on a straight-line basis over the vesting period, based upon the probability that the performance target will be met. After the performance period, if the performance targets are achieved, employees are eligible to receive dividends on shares awarded under the performance-based restricted stock program.
	Performance-based restricted stock units are settled in cash. Compensation expense relating to the issuance of performance-based restricted stock units is recorded over the vesting period and is initially based on the fair value of the award on the grant date; and is subsequently remeasured at each reporting date during the one-year performance period, based upon the probability that the performance target will be met. No dividend equivalents are paid on awards under the performance-based restricted stock unit program.
	•	Employee Stock Purchase Plan.  The Company offers an employee stock purchase plan that allows eligible employees to purchase shares of common stock at a price equal to 95% of the market value for the Company's common stock on the last day of the offering period.  This plan has been deemed non-compensatory, and therefore no compensation expense has been recorded.
	The Company currently utilizes treasury stock to satisfy stock option exercises, issuances under the Company's employee stock purchase plan, and restricted stock awards.  From time to time, the Company may repurchase shares of its common stock under its authorized share repurchase programs.  The Company repurchased 4.2 million shares in the three months ended September 30, 2013 as compared to 3.3 million shares repurchased in the three months ended September 30, 2012. The Company considers several factors in determining when to execute share repurchases, including, among other things, actual and potential acquisition activity, cash balances and cash flows, issuances due to employee benefit plan activity, and market conditions.
	The following table represents stock-based compensation expense and related income tax benefits for the three months ended September 30, 2013 and 2012, respectively:
		Three Months Ended
		September 30,
		2013			2012
	Operating expenses	$	4.6		$	3.7
	Selling, general and administrative expenses	19.4			13.8
	System development and programming costs	3.2			3.5
	Total pretax stock-based compensation expense	$	27.2		$	21
	Income tax benefit	$	9.7		$	7.5
	As of September 30, 2013, the total remaining unrecognized compensation cost related to non-vested stock options, restricted stock units, and restricted stock awards amounted to $8.1 million, $40.2 million, and $174.7 million, respectively, which will be amortized over the weighted-average remaining requisite service periods of 1.9 years, 1.7 years, and 1.8 years, respectively.
	During the three months ended September 30, 2013, the following activity occurred under the Company’s existing plans:
	Stock Options:
			Number		Weighted
			of Options		Average Price
			(in thousands)		(in dollars)
	Options outstanding at July 1, 2013		11,110		$	44
	Options granted		52		$	74
	Options exercised		(1,295	)	$	40
	Options canceled		(6	)	$	48
	Options outstanding at September 30, 2013		9,861		$	45
	Time-Based Restricted Stock and Time-Based Restricted Stock Units:
			Number of Shares		Number of Units
			(in thousands)		(in thousands)
	Restricted shares/units outstanding at July 1, 2013		1,313		280
	Restricted shares/units granted		1,226		308
	Restricted shares/units vested		(41	)	—
	Restricted shares/units forfeited		(17	)	(1	)
	Restricted shares/units outstanding at September 30, 2013		2,481		587
	Performance-Based Restricted Stock and Performance-Based Restricted Stock Units:
			Number of Shares		Number of Units
			(in thousands)		(in thousands)
	Restricted shares/units outstanding at July 1, 2013		521		38
	Restricted shares/units granted		843		58
	Restricted shares/units vested		—		(6	)
	Restricted shares/units forfeited		(11	)	(1	)
	Restricted shares/units outstanding at September 30, 2013		1,353		89
	The fair value of each stock option issued is estimated on the date of grant using a binomial option pricing model.  The binomial model considers a range of assumptions related to volatility, risk-free interest rate, and employee exercise behavior.  Expected volatilities utilized in the binomial model are based on a combination of implied market volatilities, historical volatility of the Company’s stock price, and other factors.  Similarly, the dividend yield is based on historical experience and expected future changes. The risk-free rate is derived from the U.S. Treasury yield curve in effect at the time of grant.  The binomial model also incorporates exercise and forfeiture assumptions based on an analysis of historical data.  The expected life of the stock option grant is derived from the output of the binomial model and represents the period of time that options granted are expected to be outstanding.
	The fair value for stock options granted was estimated at the date of grant using the following assumptions:
		Three Months Ended
		September 30,
		2013			2012
	Risk-free interest rate	1.50%			0.80%
	Dividend yield	2.40%			2.70%
	Weighted average volatility factor	23.60%			24.40%
	Weighted average expected life (in years)	5.4			5.3
	Weighted average fair value (in dollars)	$	12.44		$	8.9
	B.  Pension Plans
	The components of net pension expense were as follows:
		Three Months Ended
		September 30,
	2013			2012
Service cost – benefits earned during the period	$	16.6		$	16.8
Interest cost on projected benefits	15.6			13.8
Expected return on plan assets	(29.8		)	(27.4		)
Net amortization and deferral	5			7.7
Net pension expense	$	7.4		$	10.9
During the three months ended September 30, 2013, the Company contributed $77.3 million to the pension plans and expects to contribute an additional $6.9 million to the pension plans during the remainder of the fiscal year ended June 30, 2014.

Income_Taxes

Income Taxes	3 Months Ended
	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Note 12. Income Taxes
	The effective tax rate for the three months ended September 30, 2013 and 2012 was 33.9% and 35.0%, respectively. The decrease in the effective tax rate is due to the resolution of certain tax matters during the three months ended September 30, 2013.

Commitments_And_Contingencies

Commitments And Contingencies	3 Months Ended
	Sep. 30, 2013
Commitments And Contingencies [Abstract]	'
Commitments And Contingencies	'
	Note 13. Commitments and Contingencies
	On July 18, 2011, athenahealth, Inc. filed a patent infringement lawsuit against ADP AdvancedMD, Inc. ("ADP AdvancedMD"), a subsidiary of the Company, seeking monetary damages, injunctive relief, and costs.  The allegations include a claim that ADP AdvancedMD's activities in providing medical practice management and billing and revenue management software and associated services to physicians and medical practice managers infringe a patent owned by athenahealth, Inc.  The parties are currently engaged in the discovery process and are awaiting a claim construction order from the court.  The Company believes that it has meritorious defenses to this lawsuit and continues to vigorously defend itself against the allegations.
	In June 2011, the Company received a Commissioner’s Charge from the U.S. Equal Employment Opportunity Commission (“EEOC”) alleging that the Company has violated Title VII of the Civil Rights Act of 1964 by refusing to recruit, hire, transfer and promote certain persons on the basis of their race, in the State of Illinois from at least the period of January 1, 2007 to the present.  The Company continues to investigate the allegations set forth in the Commissioner’s Charge and is cooperating with the EEOC’s investigation.
	The Company is subject to various claims and litigation in the normal course of business. When a loss is considered probable and reasonably estimable, the Company records a liability in the amount of its best estimate for the ultimate loss. At this time, the Company is unable to estimate any reasonably possible loss, or range of reasonably possible loss, with respect to the matters described above. This is primarily because these matters involve complex issues subject to inherent uncertainty. There can be no assurance that these matters will be resolved in a manner that is not adverse to the Company.
	It is not the Company’s business practice to enter into off-balance sheet arrangements. In the normal course of business, the Company may enter into contracts in which it makes representations and warranties that relate to the performance of the Company’s services and products.  The Company does not expect any material losses related to such representations and warranties.
	The Company has obligations related to purchase and maintenance agreements on the software, equipment, and other assets that were disclosed in its Annual Report on Form 10-K for the year ended June 30, 2013. In August 2013, the Company extended the term of a contract, which resulted in incremental obligations of $64.5 million and $43.5 million for the fiscal years ending June 30, 2018 and June 30, 2019, respectively.

Foreign_Currency_Risk_Manageme

Foreign Currency Risk Management (Notes)	3 Months Ended
	Sep. 30, 2013
Foreign Currency Risk Management [Abstract]	'
Fair Value, Concentration of Risk [Table Text Block]	'
	Note 14. Foreign Currency Risk Management Programs
	The Company transacts business in various foreign jurisdictions and is therefore exposed to market risk from changes in foreign currency exchange rates that could impact its consolidated results of operations, financial position, or cash flows.  The Company manages its exposure to these market risks through its regular operating and financing activities and, when deemed appropriate, through the use of derivative financial instruments.  The Company does not use derivative financial instruments for trading purposes.  The Company had no derivative financial instruments outstanding at September 30, 2013 or June 30, 2013.

Reclassification_out_of_Accumu

Reclassification out of Accumulated Other Comprehensive Income (Notes)	3 Months Ended
	Sep. 30, 2013
Reclassification out of Accumulated Other Comprehensive Income [Abstract]	'
Disclosure of Reclassification Amount [Text Block]	'
	Note 15. Reclassifications out of Accumulated Other Comprehensive Income
	Changes in Accumulated Other Comprehensive Income ("AOCI") by component are as follows:
		Currency Translation Adjustment		Net Gains on Available-for-sale Securities				Pension Liability				Accumulated Other Comprehensive Income
	Balance at June 30, 2013	$	39.6	$	186.7			$	(210.9	)		$	15.4
	Other comprehensive income before	43.3		14.8				—				58.1
	reclassification adjustments
	Tax effect	—		(5.0		)		—				(5.0		)
	Reclassification adjustments to	—		(3.5		)	(A)	5.1			(B)	1.6
	net earnings
	Tax effect	—		1.3				(0.9		)		0.4
	Balance at September 30, 2013	$	82.9	$	194.3			$	(206.7	)		$	70.5
	(A) Reclassification adjustments out of AOCI are included within Other income, net, on the Statements of Consolidated Earnings.
	(B) Reclassification adjustments out of AOCI are included in net pension expense (see Note 11).

Financial_Data_By_Segment

Financial Data By Segment	3 Months Ended
	Sep. 30, 2013
Interim Financial Data By Segment [Abstract]	'
Interim Financial Data By Segment	'
	Note 16. Interim Financial Data by Segment
	Based upon similar economic and operational characteristics, the Company’s strategic business units have been aggregated into the following three reportable segments: Employer Services, PEO Services, and Dealer Services.  The primary components of the “Other” segment are the results of operations of ADP Indemnity (a wholly-owned captive insurance company that provides workers’ compensation and employer’s liability deductible reimbursement insurance protection for PEO Services worksite employees), non-recurring gains and losses, miscellaneous processing services, such as customer financing transactions, and certain charges and expenses that have not been allocated to the reportable segments, such as stock-based compensation expense.
	Certain revenues and expenses are charged to the reportable segments at a standard rate for management reasons.  Other costs are recorded based on management responsibility.  There is a reconciling item for the difference between actual interest income earned on invested funds held for clients and interest credited to Employer Services and PEO Services at a standard rate of 4.5%. This allocation is made for management reasons so that the reportable segments' results are presented on a consistent basis without the impact of fluctuations in interest rates. This reconciling adjustment to the reportable segments' revenues and earnings from continuing operations before income taxes is eliminated in consolidation.
	To align financial reporting with the manner in which the Company's chief operating decision maker assesses performance and makes decisions about resources to be allocated to the reportable segments, effective July 1, 2013, the Company no longer allocates a cost of capital charge to its reportable segments and no longer adjusts the operating results of its reportable segments on a constant exchange rate basis.  As a result of these changes, all prior period amounts have been reclassified to conform to the current period presentation.  These changes did not significantly affect reportable segment results.
	Segment Results:
		Revenues from Continuing Operations
		Three Months Ended
		September 30,
		2013			2012
	Employer Services	$	1,968.00		$	1,818.90
	PEO Services	505.1			451.9
	Dealer Services	472.8			440.1
	Other	0.1			0.7
	Reconciling item:
	Client fund interest	(106.4		)	(74.1		)
		$	2,839.60		$	2,637.50
		Earnings from Continuing Operations before Income Taxes
		Three Months Ended
		September 30,
		2013			2012
	Employer Services	$	522.6		$	455.1
	PEO Services	51.9			46.3
	Dealer Services	96.8			85.8
	Other	(67.6		)	(47.5		)
	Reconciling item:
	Client fund interest	(106.4		)	(74.1		)
		$	497.3		$	465.6
	During the three months ended September 30, 2013 and 2012, Dealer Services earned 11% of its segment revenues from one client. The Company did not have any customers that individually accounted for more than 10% of the Company's consolidated revenue from continuing operations.

Subsequent_Events_Notes

Subsequent Events (Notes)	3 Months Ended
	Sep. 30, 2013
Subsequent Events [Abstract]	'
Subsequent Events	'
	Note 17. Subsequent Events
	With the exception of the repayments of the reverse repurchase obligations and the commercial paper obligation in October 2013 discussed in Note 10, there are no further subsequent events for disclosure.

Earnings_per_Share_Tables

Earnings per Share (Tables)	3 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]	'
		Basic		Effect of Employee Stock Option Shares	Effect of	Diluted
					Employee
					Restricted
					Stock
					Shares
	Three months ended September 30,
	2013
	Net earnings from continuing operations	$	328.6			$	328.6
	Weighted average shares (in millions)	480.1		3.1	1.2	484.3
	EPS from continuing operations	$	0.68			$	0.68
	2012
	Net earnings from continuing operations	$	302.5			$	302.5
	Weighted average shares (in millions)	483.5		3.6	1.3	488.4
	EPS from continuing operations	$	0.63			$	0.62

Other_Income_Net_Tables

Other Income, Net (Tables)	3 Months Ended
	Sep. 30, 2013
Other Income, Net [Abstract]	'
Other Income, net	'
		Three Months Ended
		September 30,
		2013			2012
	Interest income on corporate funds	$	(19.0	)	$	(23.8	)
	Realized gains on available-for-sale securities	(4.3		)	(4.9		)
	Realized losses on available-for-sale securities	0.8			0.4
	Other, net	(0.1		)	(0.8		)
	Other income, net	$	(22.6	)	$	(29.1	)

Divestiture_Tables

Divestiture (Tables)	3 Months Ended
	Sep. 30, 2013
Divestitures [Abstract]	'
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]	'
		Three Months Ended
		September 30,
		2012
	Revenues	$	12.9
	Earnings from discontinued operations before income taxes	4.5
	Provision for income taxes	1.7
	Net earnings from discontinued operations	$	2.8

Corporate_Investments_And_Fund1

Corporate Investments And Funds Held For Clients (Tables)	3 Months Ended
	Sep. 30, 2013
Corporate Investments And Funds Held For Clients [Abstract]	'
Available-for-sale Securities [Table Text Block]	'
		September 30, 2013
		Amortized			Gross			Gross			Fair Value (A)
		Cost			Unrealized			Unrealized
					Gains			Losses
	Type of issue:
	Money market securities and other cash equivalents	$	2,498.00		$	—		$	—		$	2,498.00
	Available-for-sale securities:
	Corporate bonds	7,719.60			166.4			(42.9		)	7,843.10
	U.S. Treasury and direct obligations of	5,983.30			142.5			(32.6		)	6,093.20
	U.S. government agencies
	Asset-backed securities	1,351.80			4.7			(14.3		)	1,342.20
	Canadian government obligations and	1,024.70			10			(3.6		)	1,031.10
	Canadian government agency obligations
	Canadian provincial bonds	702.5			20.3			(5.1		)	717.7
	Municipal bonds	526.9			16.7			(3.6		)	540
	Other securities	1,070.30			42.4			(2.2		)	1,110.50
	Total available-for-sale securities	18,379.10			403			(104.3		)	18,677.80
	Total corporate investments and funds held for clients	$	20,877.10		$	403		$	(104.3	)	$	21,175.80
	(A) Included within available-for-sale securities are corporate investments with fair values of $3,090.9 million and funds held for clients with fair values of $15,586.9 million. At September 30, 2013, Level 1 securities included $8.0 million of corporate investments classified within "Other securities." All remaining available-for-sale securities were included in Level 2.
		June 30, 2013
		Amortized			Gross			Gross			Fair Value (B)
		Cost			Unrealized			Unrealized
					Gains			Losses
	Type of issue:
	Money market securities and other cash equivalents	$	5,431.20		$	—		$	—		$	5,431.20
	Available-for-sale securities:
	Corporate bonds	7,868.30			166.2			(56.7		)	7,977.80
	U.S. Treasury and direct obligations of	5,983.70			152.6			(37.4		)	6,098.90
	U.S. government agencies
	Asset-backed securities	1,374.10			5.3			(19.7		)	1,359.70
	Canadian government obligations and	998.2			10.7			(4.5		)	1,004.40
	Canadian government agency obligations
	Canadian provincial bonds	695.7			20.7			(5.6		)	710.8
	Municipal bonds	536.9			16.7			(4.4		)	549.2
	Other securities	1,094.40			46.3			(2.8		)	1,137.90
	Total available-for-sale securities	18,551.30			418.5			(131.1		)	18,838.70
	Total corporate investments and funds held for clients	$	23,982.50		$	418.5		$	(131.1	)	$	24,269.90
	(B) Included within available-for-sale securities are corporate investments with fair values of $342.0 million and funds held for clients with fair values of $18,496.7 million. At June 30, 2013, Level 1 securities included $9.5 million of corporate investments classified within "Other securities." All remaining available-for-sale securities were included in Level 2.
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Table Text Block]	'
	The unrealized losses and fair values of available-for-sale securities that have been in an unrealized loss position for a period of less than and greater than 12 months as of September 30, 2013, are as follows:
		September 30, 2013
		Unrealized			Fair market			Unrealized			Fair market		Total gross			Total fair
		losses			value less than			losses			value greater		unrealized			market value
		less than			12 months			greater than			than 12 months		losses
		12 months						12 months
	Corporate bonds	$	(41.7	)	$	2,224.30		$	(1.2	)	$	15.3	$	(42.9	)	$	2,239.60
	U.S. Treasury and direct obligations of	(32.6		)	1,361.70			—			—		(32.6		)	1,361.70
	U.S. government agencies
	Asset-backed securities	(14.3		)	1,001.90			—			—		(14.3		)	1,001.90
	Canadian government obligations and	(3.6		)	456.8			—			—		(3.6		)	456.8
	Canadian government agency obligations
	Canadian provincial bonds	(5.1		)	240.8			—			—		(5.1		)	240.8
	Municipal bonds	(3.6		)	155			—			0.8		(3.6		)	155.8
	Other securities	(2.2		)	89.1			—			—		(2.2		)	89.1
		$	(103.1	)	$	5,529.60		$	(1.2	)	$	16.1	$	(104.3	)	$	5,545.70
	The unrealized losses and fair values of available-for-sale securities that have been in an unrealized loss position for a period of less than and greater than 12 months as of June 30, 2013 are as follows:
		30-Jun-13
		Unrealized			Fair market			Unrealized			Fair market		Total gross			Total fair
		losses			value less than			losses			value greater		unrealized			market value
		less than			12 months			greater than			than 12 months		losses
		12 months						12 months
	Corporate bonds	$	(56.7	)	$	2,724.90		$	—		$	—	$	(56.7	)	$	2,724.90
	U.S. Treasury and direct obligations of U.S. government agencies	(37.4		)	1,374.60			—			—		(37.4		)	1,374.60
	Asset-backed securities	(19.7		)	1,060.10			—			—		(19.7		)	1,060.10
	Canadian government obligations and	(4.5		)	444.7			—			—		(4.5		)	444.7
	Canadian government agency obligations
	Canadian provincial bonds	(5.6		)	239.7			—			—		(5.6		)	239.7
	Municipal bonds	(4.4		)	188.7			—			—		(4.4		)	188.7
	Other securities	(2.8		)	109.3			—			—		(2.8		)	109.3
		$	(131.1	)	$	6,142.00		$	—		$	—	$	(131.1	)	$	6,142.00
Classification Of Corporate Investments On The Consolidated Balance Sheets	'
			September 30,			June 30,
			2013			2013
	Corporate investments:
	Cash and cash equivalents		$	1,149.00		$	1,699.10
	Short-term marketable securities		541.9			28
	Long-term marketable securities		2,549.00			314
	Total corporate investments		$	4,239.90		$	2,041.10
Schedule Of Investment Of Funds Held For Clients	'
			September 30,			June 30,
			2013			2013
	Funds held for clients:
	Restricted cash and cash equivalents held to satisfy client funds obligations		$	1,349.00		$	3,732.10
	Restricted short-term marketable securities held to satisfy client funds obligations		928			1,407.70
	Restricted long-term marketable securities held to satisfy client funds obligations		14,658.90			17,089.00
	Total funds held for clients		$	16,935.90		$	22,228.80
Expected Maturities Of Available-For-Sale Securities	'
	One year or less	$	1,469.90
	One year to two years	4,105.80
	Two years to three years	4,414.80
	Three years to four years	3,162.30
	After four years	5,525.00
	Total available-for-sale securities	$	18,677.80

Receivables_Tables

Receivables (Tables)	3 Months Ended
	Sep. 30, 2013
Accounts, Notes, Loans and Financing Receivable, Classified [Abstract]	'
Schedule Of The Company's Receivables	'
		September 30, 2013						June 30, 2013
		Current			Long-term			Current			Long-term
	Trade receivables	$	1,558.20		$	—		$	1,564.80		$	—
	Notes receivable	90.5			156.2			91			154.7
	Less:
	Allowance for doubtful accounts - trade receivables	(50.9		)	—			(45.6		)	—
	Allowance for doubtful accounts - notes receivable	(5.6		)	(9.7		)	(5.3		)	(9.0		)
	Unearned income - notes receivable	(6.4		)	(6.5		)	(6.6		)	(7.0		)
		$	1,585.80		$	140		$	1,598.30		$	138.7
Schedule Of The Allowance For Doubtful Accounts For Notes Receivable	'
		September 30, 2013
		Notes Receivable						Reserve
		Current			Long-term			Current			Long-term
	Specific reserve	$	0.3		$	0.5		$	0.3		$	0.5
	Non-specific reserve	90.2			155.7			5.3			9.2
		$	90.5		$	156.2		$	5.6		$	9.7
		June 30, 2013
		Notes Receivable						Reserve
		Current			Long-term			Current			Long-term
	Specific reserve	$	0.3		$	0.5		$	0.3		$	0.5
	Non-specific reserve	90.7			154.2			5			8.5
		$	91		$	154.7		$	5.3		$	9
Rollforward Of The Allowance For Doubtful Accounts For Notes Receivable	'
		Current			Long-term
	Balance at June 30, 2013	$	5.3		$	9
	Incremental provision	0.4			0.6
	Recoveries and other	—			0.3
	Chargeoffs	(0.1		)	(0.2		)
	Balance at September 30, 2013	$	5.6		$	9.7

Goodwill_And_Intangible_Assets1

Goodwill And Intangible Assets, Net (Tables)	3 Months Ended
	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Changes In Goodwill	'
		Employer				PEO				Dealer		Total
		Services				Services				Services
	Balance at June 30, 2013 (A)	$	1,878.80			$	4.8			$	1,169.00	$	3,052.60
	Additions and other adjustments, net	1				—				11.1		12.1
	Currency translation adjustments	23.9				—				7.1		31
	Balance at September 30, 2013 (A)	$	1,903.70			$	4.8			$	1,187.20	$	3,095.70
Components Of Finite-Lived Intangible Assets	'
			September 30,				June 30,
			2013				2013
	Intangible assets:
	Software and software licenses		$	1,545.80			$	1,511.10
	Customer contracts and lists		858.8				848.9
	Other intangibles		241.8				241.7
			2,646.40				2,601.70
	Less accumulated amortization:
	Software and software licenses		(1,267.0		)		(1,239.5		)
	Customer contracts and lists		(552.4		)		(534.3		)
	Other intangibles		(187.9		)		(184.7		)
			(2,007.3		)		(1,958.5		)
	Intangible assets, net		$	639.1			$	643.2
Schedule Of Finite-Lived Intangible Assets, Future Amortization Expense	'
		Amount
	Nine months ending June 30, 2014	$	123.4
	Twelve months ending June 30, 2015	$	136.9
	Twelve months ending June 30, 2016	$	99.5
	Twelve months ending June 30, 2017	$	71.6
	Twelve months ending June 30, 2018	$	46.2
	Twelve months ending June 30, 2019	$	32.1

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	3 Months Ended
	Sep. 30, 2013
Compensation and Retirement Disclosure [Abstract]	'
Components Of Stock-Based Compensation Expense	'
		Three Months Ended
		September 30,
		2013			2012
	Operating expenses	$	4.6		$	3.7
	Selling, general and administrative expenses	19.4			13.8
	System development and programming costs	3.2			3.5
	Total pretax stock-based compensation expense	$	27.2		$	21
	Income tax benefit	$	9.7		$	7.5
Changes In Stock Options Outstanding	'
			Number		Weighted
			of Options		Average Price
			(in thousands)		(in dollars)
	Options outstanding at July 1, 2013		11,110		$	44
	Options granted		52		$	74
	Options exercised		(1,295	)	$	40
	Options canceled		(6	)	$	48
	Options outstanding at September 30, 2013		9,861		$	45
Time Based Restricted Shares and Units	'
			Number of Shares		Number of Units
			(in thousands)		(in thousands)
	Restricted shares/units outstanding at July 1, 2013		1,313		280
	Restricted shares/units granted		1,226		308
	Restricted shares/units vested		(41	)	—
	Restricted shares/units forfeited		(17	)	(1	)
	Restricted shares/units outstanding at September 30, 2013		2,481		587
Performance Based Restricted shares and units	'
			Number of Shares		Number of Units
			(in thousands)		(in thousands)
	Restricted shares/units outstanding at July 1, 2013		521		38
	Restricted shares/units granted		843		58
	Restricted shares/units vested		—		(6	)
	Restricted shares/units forfeited		(11	)	(1	)
	Restricted shares/units outstanding at September 30, 2013		1,353		89
Assumptions Used To Estimate Fair Value For Stock Options Granted	'
		Three Months Ended
		September 30,
		2013			2012
	Risk-free interest rate	1.50%			0.80%
	Dividend yield	2.40%			2.70%
	Weighted average volatility factor	23.60%			24.40%
	Weighted average expected life (in years)	5.4			5.3
	Weighted average fair value (in dollars)	$	12.44		$	8.9
Components Of Net Pension Expense	'
		Three Months Ended
		September 30,
		2013			2012
	Service cost – benefits earned during the period	$	16.6		$	16.8
	Interest cost on projected benefits	15.6			13.8
	Expected return on plan assets	(29.8		)	(27.4		)
	Net amortization and deferral	5			7.7
	Net pension expense	$	7.4		$	10.9

Reclassification_out_of_Accumu1

Reclassification out of Accumulated Other Comprehensive Income (Tables)	3 Months Ended
	Sep. 30, 2013
Reclassications out of Accumulated Other Comprehensive Income (Loss) [Abstract]	'
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]	'
		Currency Translation Adjustment		Net Gains on Available-for-sale Securities				Pension Liability				Accumulated Other Comprehensive Income
	Balance at June 30, 2013	$	39.6	$	186.7			$	(210.9	)		$	15.4
	Other comprehensive income before	43.3		14.8				—				58.1
	reclassification adjustments
	Tax effect	—		(5.0		)		—				(5.0		)
	Reclassification adjustments to	—		(3.5		)	(A)	5.1			(B)	1.6
	net earnings
	Tax effect	—		1.3				(0.9		)		0.4
	Balance at September 30, 2013	$	82.9	$	194.3			$	(206.7	)		$	70.5

Financial_Data_By_Segment_Inte

Financial Data By Segment Interim Financial Data By Segment (Tables)	3 Months Ended
	Sep. 30, 2013
Interim Financial Data By Segment [Abstract]	'
Schedule of Segment Reporting Information, by Segment [Table Text Block]	'
		Revenues from Continuing Operations
		Three Months Ended
		September 30,
		2013			2012
	Employer Services	$	1,968.00		$	1,818.90
	PEO Services	505.1			451.9
	Dealer Services	472.8			440.1
	Other	0.1			0.7
	Reconciling item:
	Client fund interest	(106.4		)	(74.1		)
		$	2,839.60		$	2,637.50
		Earnings from Continuing Operations before Income Taxes
		Three Months Ended
		September 30,
		2013			2012
	Employer Services	$	522.6		$	455.1
	PEO Services	51.9			46.3
	Dealer Services	96.8			85.8
	Other	(67.6		)	(47.5		)
	Reconciling item:
	Client fund interest	(106.4		)	(74.1		)
		$	497.3		$	465.6

Earnings_per_Share_Details

Earnings per Share (Details) (USD $)	3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]	'	'
NET EARNINGS FROM CONTINUING OPERATIONS	$328.60	$302.50
Weighted Average Number of Shares Outstanding, Basic	480.1	483.5
Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants	3.1	3.6
Effect of Employee Restricted stock Shares On Weighted Average Number of Diluted Shares Outstanding	1.2	1.3
Weighted Average Number of Shares Outstanding, Diluted	484.3	488.4
Income (Loss) from Continuing Operations, Per Basic Share	$0.68	$0.63
Income (Loss) from Continuing Operations, Per Diluted Share	$0.68	$0.62
Options excluded from the calculation of diluted earnings per share	0.1	0.9

Other_Income_Net_Other_Income_

Other Income, Net (Other Income, Net) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Other Income, Net [Abstract]	'	'
Interest income on corporate funds	($19)	($23.80)
Realized gains on available-for-sale securities	-4.3	-4.9
Realized losses on available-for-sale securities	0.8	0.4
Other, net	-0.1	-0.8
Other income, net	($22.60)	($29.10)

Acquisitions_Details

Acquisitions (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
	business
Business Acquisition [Line Items]	'	'
Number of businesses acquired	1	'
Acquisition Purchase Price	$12.50	'
Contingent Payment	'	$0.50

Divestiture_Details

Divestiture (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]	'	'	'
Disposal Date	'	'	17-Dec-12
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	'	'	$58.80
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax [Abstract]	'	'	'
Revenues	'	12.9	'
EARNINGS FROM DISCONTINUED OPERATIONS BEFORE INCOME TAXES	0	4.5	'
Provision for income taxes	'	1.7	'
Net earnings from discontinued operations	$0	$2.80	'

Corporate_Investments_And_Fund2

Corporate Investments And Funds Held For Clients (Narrative) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013		Jun. 30, 2013
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities - Fair Value	$18,677.80	[1]	$18,838.70	[2]
Length of shortest cash flow of residential mortgages used as collateral for companies mortgage backed securities (in years)	'15 years		'
Length of longest cash flow of residential mortgages used as collateral for company's mortgage backed securities (in years)	'30 years		'
Client Fund Obligation repayment period	'1 year		'
Client funds obligations	16,718		21,956.30
Client funds investments with original maturities	'90 days or less		'
Percentage of the available-for-sale securities were rated AAA or AA	84.00%		'
Federal Home Loan Banks [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities - Fair Value	4,390.70		4,325.40
Federal Farm Credit Banks [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities - Fair Value	1,228.50		1,229
Fixed Rate Credit Card [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities - Fair Value	898		904.5
Asset-Backed Auto Loan Receivables [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities - Fair Value	313.1		315.7
Rate Reduction [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities - Fair Value	86.8		95.4
Supranational Bonds [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities - Fair Value	434.6		426.9
Sovereign Bonds [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities - Fair Value	417.3		415.4
Commercial Mortgage Backed Securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities - Fair Value	136.9		163.5
Residential Mortgage-Backed Securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities - Fair Value	103.9		112.6
Fair Value, Inputs, Level 1 [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities - Fair Value	8		9.5
Corporate Investments [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities - Fair Value	3,090.90		342
Funds Held For Clients [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities - Fair Value	$15,586.90		$18,496.70
Earliest [Member] | Corporate Bond Securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale Securities, Debt Maturities, Date	1-Oct-13		'
Earliest [Member] | US Treasury Securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale Securities, Debt Maturities, Date	1-Oct-13		'
Latest [Member] | Corporate Bond Securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale Securities, Debt Maturities, Date	1-Jun-23		'
Latest [Member] | US Treasury Securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale Securities, Debt Maturities, Date	1-May-23		'
[1]	Included within available-for-sale securities are corporate investments with fair values of $3,090.9 million and funds held for clients with fair values of $15,586.9 million. At September 30, 2013, Level 1 securities included $8.0 million of corporate investments classified within "Other securities." All remaining available-for-sale securities were included in Level 2.
[2]	Included within available-for-sale securities are corporate investments with fair values of $342.0 million and funds held for clients with fair values of $18,496.7 million. At June 30, 2013, Level 1 securities included $9.5 million of corporate investments classified within "Other securities." All remaining available-for-sale securities were included in Level 2.

Corporate_Investments_And_Fund3

Corporate Investments And Funds Held For Clients (Corporate Investments And Funds Held For Clients) (Details) (USD $)	Sep. 30, 2013		Jun. 30, 2013
In Millions, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'		'
Money market securities and other cash equivalents - Amortized Cost	$2,498		$5,431.20
Money market securities and other cash equivalents - Fair Value	2,498		5,431.20
Available-for-sale securities - Amortized Cost	18,379.10		18,551.30
Available-for-sale securities - Gross Unrealized Gains	403		418.5
Available-for-sale securities - Gross Unrealized Losses	-104.3		-131.1
Available-for-sale securities - Fair Value	18,677.80	[1]	18,838.70	[2]
Total corporate investments and funds held for clients - Amortized Cost	20,877.10		23,982.50
Total corporate investments and funds held for clients - Gross Unrealized Gains	403		418.5
Total corporate investments and funds held for clients - Gross Unrealized Losses	-104.3		-131.1
Total corporate investments and funds held for clients - Fair Value	21,175.80		24,269.90
Corporate Bonds [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities - Amortized Cost	7,719.60		7,868.30
Available-for-sale securities - Gross Unrealized Gains	166.4		166.2
Available-for-sale securities - Gross Unrealized Losses	-42.9		-56.7
Available-for-sale securities - Fair Value	7,843.10	[1]	7,977.80	[2]
US Treasury and Government [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities - Amortized Cost	5,983.30		5,983.70
Available-for-sale securities - Gross Unrealized Gains	142.5		152.6
Available-for-sale securities - Gross Unrealized Losses	-32.6		-37.4
Available-for-sale securities - Fair Value	6,093.20	[1]	6,098.90	[2]
Asset-Backed Securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities - Amortized Cost	1,351.80		1,374.10
Available-for-sale securities - Gross Unrealized Gains	4.7		5.3
Available-for-sale securities - Gross Unrealized Losses	-14.3		-19.7
Available-for-sale securities - Fair Value	1,342.20	[1]	1,359.70	[2]
Canadian Government Obligations And Canadian Government Agency Obligations [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities - Amortized Cost	1,024.70		998.2
Available-for-sale securities - Gross Unrealized Gains	10		10.7
Available-for-sale securities - Gross Unrealized Losses	-3.6		-4.5
Available-for-sale securities - Fair Value	1,031.10	[1]	1,004.40	[2]
Canadian Provincial Bonds [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities - Amortized Cost	702.5		695.7
Available-for-sale securities - Gross Unrealized Gains	20.3		20.7
Available-for-sale securities - Gross Unrealized Losses	-5.1		-5.6
Available-for-sale securities - Fair Value	717.7	[1]	710.8	[2]
Municipal Bonds [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities - Amortized Cost	526.9		536.9
Available-for-sale securities - Gross Unrealized Gains	16.7		16.7
Available-for-sale securities - Gross Unrealized Losses	-3.6		-4.4
Available-for-sale securities - Fair Value	540	[1]	549.2	[2]
Other Securities [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities - Amortized Cost	1,070.30		1,094.40
Available-for-sale securities - Gross Unrealized Gains	42.4		46.3
Available-for-sale securities - Gross Unrealized Losses	-2.2		-2.8
Available-for-sale securities - Fair Value	1,110.50	[1]	1,137.90	[2]
Corporate Investments [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities - Fair Value	3,090.90		342
Funds Held For Clients [Member]	'		'
Schedule of Available-for-sale Securities [Line Items]	'		'
Available-for-sale securities - Fair Value	$15,586.90		$18,496.70
[1]	Included within available-for-sale securities are corporate investments with fair values of $3,090.9 million and funds held for clients with fair values of $15,586.9 million. At September 30, 2013, Level 1 securities included $8.0 million of corporate investments classified within "Other securities." All remaining available-for-sale securities were included in Level 2.
[2]	Included within available-for-sale securities are corporate investments with fair values of $342.0 million and funds held for clients with fair values of $18,496.7 million. At June 30, 2013, Level 1 securities included $9.5 million of corporate investments classified within "Other securities." All remaining available-for-sale securities were included in Level 2.

Corporate_Investments_And_Fund4

Corporate Investments And Funds Held For Clients (Available-For-Sale Securities That Have Been In An Unrealized Loss Position) (Details) (USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013
Schedule of Available-for-sale Securities [Line Items]	'	'
Unrealized losses less than 12 months	($103.10)	($131.10)
Fair market value of securities in unrealized loss position less than 12 months	5,529.60	6,142
Unrealized losses greater than 12 months	-1.2	'
Fair market value of securities in unrealized loss positions greater than 12 months	16.1	'
Total available for sale securities - Unrealized Loss	-104.3	-131.1
Total fair market value of securities in unrealized loss position	5,545.70	6,142
Corporate Bonds [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Unrealized losses less than 12 months	-41.7	-56.7
Fair market value of securities in unrealized loss position less than 12 months	2,224.30	2,724.90
Unrealized losses greater than 12 months	-1.2	'
Fair market value of securities in unrealized loss positions greater than 12 months	15.3	'
Total available for sale securities - Unrealized Loss	-42.9	-56.7
Total fair market value of securities in unrealized loss position	2,239.60	2,724.90
US Treasury and Government [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Unrealized losses less than 12 months	-32.6	-37.4
Fair market value of securities in unrealized loss position less than 12 months	1,361.70	1,374.60
Total available for sale securities - Unrealized Loss	-32.6	-37.4
Total fair market value of securities in unrealized loss position	1,361.70	1,374.60
Asset-Backed Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Unrealized losses less than 12 months	-14.3	-19.7
Fair market value of securities in unrealized loss position less than 12 months	1,001.90	1,060.10
Total available for sale securities - Unrealized Loss	-14.3	-19.7
Total fair market value of securities in unrealized loss position	1,001.90	1,060.10
Canadian Government Obligations And Canadian Government Agency Obligations [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Unrealized losses less than 12 months	-3.6	-4.5
Fair market value of securities in unrealized loss position less than 12 months	456.8	444.7
Total available for sale securities - Unrealized Loss	-3.6	-4.5
Total fair market value of securities in unrealized loss position	456.8	444.7
Canadian Provincial Bonds [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Unrealized losses less than 12 months	-5.1	-5.6
Fair market value of securities in unrealized loss position less than 12 months	240.8	239.7
Total available for sale securities - Unrealized Loss	-5.1	-5.6
Total fair market value of securities in unrealized loss position	240.8	239.7
Municipal Bonds [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Unrealized losses less than 12 months	-3.6	-4.4
Fair market value of securities in unrealized loss position less than 12 months	155	188.7
Unrealized losses greater than 12 months	0	'
Fair market value of securities in unrealized loss positions greater than 12 months	0.8	'
Total available for sale securities - Unrealized Loss	-3.6	-4.4
Total fair market value of securities in unrealized loss position	155.8	188.7
Other Securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Unrealized losses less than 12 months	-2.2	-2.8
Fair market value of securities in unrealized loss position less than 12 months	89.1	109.3
Total available for sale securities - Unrealized Loss	-2.2	-2.8
Total fair market value of securities in unrealized loss position	$89.10	$109.30

Corporate_Investments_And_Fund5

Corporate Investments And Funds Held For Clients (Classification Of Corporate Investments On The Consolidated Balance Sheets) (Details) (USD $)	Sep. 30, 2013		Jun. 30, 2013		Sep. 30, 2012	Jun. 30, 2012
In Millions, unless otherwise specified
Corporate Investments And Funds Held For Clients [Abstract]	'		'		'	'
Cash and cash equivalents	$1,149	[1]	$1,699.10	[1]	$1,117.40	$1,548.10
Short-term marketable securities	541.9	[1],[2]	28		'	'
Long-term marketable securities	2,549	[1],[2]	314	[1]	'	'
Total corporate investments	$4,239.90		$2,041.10		'	'
[1]	As of September 30, 2013, $234.0 million of long-term marketable securities, $103.6 million of short-term marketable securities, and $3.3 million of cash and cash equivalents have been pledged as collateral under the Company's reverse repurchase agreements (see Note 10). As of June 30, 2013, $245.2 million of long-term marketable securities and $0.7 million of cash and cash equivalents have been pledged as collateral under the Company's reverse repurchase agreements (see Note 10).
[2]	As of September 30, 2013, $2,132.4 million of long-term marketable securities and $407.6 million of short-term marketable securities are related to the Company's outstanding commercial paper borrowing (see Note 10).

Corporate_Investments_And_Fund6

Corporate Investments And Funds Held For Clients (Schedule Of Investment Of Funds Held For Clients) (Details) (USD $)	Sep. 30, 2013	Jun. 30, 2013
In Millions, unless otherwise specified
Corporate Investments And Funds Held For Clients [Abstract]	'	'
Restricted cash and cash equivalents held to satisfy client funds obligations	$1,349	$3,732.10
Restricted short-term marketable securities held to satisfy client funds obligations	928	1,407.70
Restricted long-term marketable securities held to satisfy client funds obligations	14,658.90	17,089
Total funds held for clients	$16,935.90	$22,228.80

Corporate_Investments_And_Fund7

Corporate Investments And Funds Held For Clients (Expected Maturities Of Available-For-Sale Securities) (Details) (USD $)	Sep. 30, 2013
In Millions, unless otherwise specified
Corporate Investments And Funds Held For Clients [Abstract]	'
Due in one year or less	$1,469.90
Due after one year to two years	4,105.80
Due after two years to three years	4,414.80
Due after three years to four years	3,162.30
Due after four years	5,525
Total available-for-sale securities	$18,677.80

Receivables_Narrative_Details

Receivables (Narrative) (Details)	Sep. 30, 2013	Jun. 30, 2013
Accounts, Notes, Loans and Financing Receivable, Classified [Abstract]	'	'
Percentage of notes receivable that are classified as current	99.00%	100.00%
Loans and Leases Receivable, Ratio of Nonperforming Loans to All Loans	6.00%	6.00%

Receivables_Schedule_Of_The_Co

Receivables (Schedule Of The Company's Receivables) (Details) (USD $)	Sep. 30, 2013	Jun. 30, 2013
In Millions, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable, Classified [Abstract]	'	'
Trade receivables - Current	$1,558.20	$1,564.80
Trade receivables - Long-term	0	0
Notes receivable - Current	90.5	91
Notes receivable - Long-term	156.2	154.7
Allowance for doubtful accounts - trade receivables - Current	-50.9	-45.6
Allowance for doubtful accounts - trade receivables - Long-term	0	0
Allowance for doubtful accounts - notes receivable - Current	-5.6	-5.3
Allowance for doubtful accounts - notes receivable - Long-term	-9.7	-9
Unearned income - notes receivable - Current	-6.4	-6.6
Deferred revenues noncurrent	6.5	7
Total - Current	1,585.80	1,598.30
Total - Long-term	$140	$138.70

Receivables_Schedule_Of_The_Al

Receivables (Schedule Of The Allowance For Doubtful Accounts For Notes Receivable) (Details) (USD $)	Sep. 30, 2013	Jun. 30, 2013
In Millions, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Notes, Loans and Financing Receivable, Gross, Current	$90.50	$91
Notes, Loans and Financing Receivable, Gross, Noncurrent	156.2	154.7
Reserve - Current	5.6	5.3
Reserve - Long-term	9.7	9
Specific Reserve [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Notes, Loans and Financing Receivable, Gross, Current	0.3	0.3
Notes, Loans and Financing Receivable, Gross, Noncurrent	0.5	0.5
Reserve - Current	0.3	0.3
Reserve - Long-term	0.5	0.5
Non-Specific Reserve [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Notes, Loans and Financing Receivable, Gross, Current	90.2	90.7
Notes, Loans and Financing Receivable, Gross, Noncurrent	155.7	154.2
Reserve - Current	5.3	5
Reserve - Long-term	$9.20	$8.50

Receivables_Rollforward_Of_The

Receivables (Rollforward Of The Allowance For Doubtful Accounts For Notes Receivable) (Details) (USD $)	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2013	Sep. 30, 2013
In Millions, unless otherwise specified			Current [Member]	Long-term [Member]
Financing Receivable, Recorded Investment [Line Items]	'	'	'	'
Beginning balance, current	$5.60	$5.30	'	'
Beginning balance, long-term	9.7	9	'	'
Incremental provision	'	'	0.4	0.6
Recoveries and others	'	'	0	0.3
Chargeoffs	'	'	-0.1	-0.2
Ending balance, current	5.6	5.3	'	'
Ending balance, long-term	$9.70	$9	'	'

Goodwill_And_Intangible_Assets2

Goodwill And Intangible Assets, Net (Narrative) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2013
Finite-Lived Intangible Assets [Line Items]	'	'	'
Goodwill, Impairment Loss	$42.70	'	$42.70
Amortization expense on intangible assets	$41.50	$42	'
Weighted average remaining useful life	'7 years	'	'
Software And Software Licenses [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Weighted average remaining useful life	'4 years	'	'
Customer Contracts And Lists [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Weighted average remaining useful life	'10 years	'	'
Other Intangibles [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Weighted average remaining useful life	'7 years	'	'

Goodwill_And_Intangible_Assets3

Goodwill And Intangible Assets, Net (Changes In Goodwill) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013
Goodwill [Roll Forward]	'
Beginning balance	$3,052.60	[1]
Additions and other adjustments, net	12.1
Currency translation adjustments	31
Ending balance	3,095.70	[1]
Employer Services [Member]	'
Goodwill [Roll Forward]	'
Beginning balance	1,878.80	[1]
Additions and other adjustments, net	1
Currency translation adjustments	23.9
Ending balance	1,903.70	[1]
PEO Services [Member]	'
Goodwill [Roll Forward]	'
Beginning balance	4.8
Additions and other adjustments, net	0
Currency translation adjustments	0
Ending balance	4.8
Dealer Services [Member]	'
Goodwill [Roll Forward]	'
Beginning balance	1,169
Additions and other adjustments, net	11.1
Currency translation adjustments	7.1
Ending balance	$1,187.20
[1]	The goodwill balance at June 30, 2013 and September 30, 2013 is net of accumulated impairment losses of $42.7 million related to the Employer Services segment.

Goodwill_And_Intangible_Assets4

Goodwill And Intangible Assets, Net (Components Of Finite-Lived Intangible Assets) (Details) (USD $)	Sep. 30, 2013	Jun. 30, 2013
In Millions, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]	'	'
Total - gross	$2,646.40	$2,601.70
Total - accumulated amortization	-2,007.30	-1,958.50
Intangible assets, net	639.1	643.2
Software And Software Licenses [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Total - gross	1,545.80	1,511.10
Total - accumulated amortization	-1,267	-1,239.50
Customer Contracts And Lists [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Total - gross	858.8	848.9
Total - accumulated amortization	-552.4	-534.3
Other Intangibles [Member]	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Total - gross	241.8	241.7
Total - accumulated amortization	($187.90)	($184.70)

Goodwill_And_Intangible_Assets5

Goodwill And Intangible Assets, Net (Schedule Of Finite-Lived Intangible Assets, Future Amortization Expense) (Details) (USD $)	Sep. 30, 2013
In Millions, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]	'
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$123.40
Nine months ending June 30, 2014	136.9
Twelve months ending June 30, 2016	99.5
Twelve months ending June 30, 2017	71.6
Twelve months ending June 30, 2018	46.2
Twelve months ending June 30, 2019	$32.10

ShortTerm_Financing_Details

Short-Term Financing (Details) (USD $)	3 Months Ended	12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013
Short-term Debt [Line Items]	'	'
Obligations under reverse repurchase agreements	$340,900,000	$245,900,000
Credit agreement period	'364 days	'
Aggregate amount of commercial paper issuable under the short-term commercial paper program	7,250,000,000	'
Maturities of commercial paper range	'overnight to up to 364 days	'
Obligation under commercial paper borrowing	2,477,000,000	0
Maturities of short-term funding agreements	'overnight to up to five business days	'
364-Day Credit Agreement [Member]	'	'
Short-term Debt [Line Items]	'	'
Maximum borrowing capacity under credit facilities	2,000,000,000	'
Expiration date of credit facilities	1-Jun-14	'
Outstanding borrowings	0	'
Credit Facility Expiring In June 2015 [Member]	'	'
Short-term Debt [Line Items]	'	'
Maximum borrowing capacity under credit facilities	3,250,000,000	'
Term of credit	'4 years	'
Expiration date of credit facilities	1-Jun-15	'
Line of credit facility potentially available increase in maximum borrowing capacity	500,000,000	'
Credit Facility Expiring In June 2018 [Member]	'	'
Short-term Debt [Line Items]	'	'
Maximum borrowing capacity under credit facilities	2,000,000,000	'
Term of credit	'5 years	'
Expiration date of credit facilities	1-Jun-18	'
Credit Facility Expiring In June 2017 [Member]	'	'
Short-term Debt [Line Items]	'	'
Line of credit facility potentially available increase in maximum borrowing capacity	500,000,000	'
Short-Term Commercial Paper Program [Member]	'	'
Short-term Debt [Line Items]	'	'
Short-term Debt, Average Outstanding Amount	3,100,000,000	3,200,000,000
Weighted average interest rates	0.10%	0.20%
Commercial Paper Weight Average Maturity	'2 days	'
Reverse Repurchase Agreements [Member]	'	'
Short-term Debt [Line Items]	'	'
Maximum borrowing capacity under credit facilities	3,000,000,000	'
Debt Instrument, Maturity Date	'	2-Jul-13
Short-term Debt, Average Outstanding Amount	$529,400,000	$534,500,000
Weighted average interest rates	0.50%	0.70%
Subsequent Event [Member] | Commercial Paper [Member]	'	'
Short-term Debt [Line Items]	'	'
Debt Instrument, Maturity Date	2-Oct-13	'
Subsequent Event [Member] | Reverse Repurchase Agreements [Member]	'	'
Short-term Debt [Line Items]	'	'
Debt Instrument, Maturity Date	1-Oct-13	'

Employee_Benefit_Plans_Narrati

Employee Benefit Plans (Narrative) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Stock options - term for stock options granted, in years	'10 years	'
Shares repurchased	4.2	3.3
Stock-based compensation expense	$27.20	$21
Total stock-based compensation - related tax benefits	9.7	7.5
Defined Benefit Plan, Contributions by Employer	77.3	'
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year	6.9	'
Stock Options Granted Prior To July Two Thousand Eight [Member]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Vesting term options granted	'5 years	'
Stock Options Granted After July 2008 [Member]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Vesting term options granted	'4 years	'
Time Based Restricted Stock granted prior to Fiscal 2013 [Domain]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Vesting term options granted	'5 years	'
Time Based Restricted Stock granted during Fiscal 2013 [Domain] [Domain]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Vesting term options granted	'2 years	'
Performance Based Restricted Stock and Units [Domain]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Minimum percentage that will ultimately vest under performance-based restricted stock awards based on performance target	0.00%	'
Maximum percentage that will ultimately vest under performance-based restricted stock awards based on performance target	150.00%	'
Employee Stock [Member]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Purchase price of common stock as percentage of market value	95.00%	'
Non-Vested Stock Options [Member]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Total remaining unrecognized compensation cost	8.1	'
Weighted-average remaining requisite vesting period	'1 year 10 months 20 days	'
Nonvested Restricted Stock Unit [Domain]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Total remaining unrecognized compensation cost	40.2	'
Weighted-average remaining requisite vesting period	'1 year 8 months 9 days	'
Non-Vested Restricted Stock [Member]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Total remaining unrecognized compensation cost	$174.70	'
Weighted-average remaining requisite vesting period	'1 year 9 months 28 days	'
Minimum [Member] | Performance Based Restricted Stock and Units [Domain]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Share Based Compensation Arrangement By Share Based Payment Award Performance Period	'1 year	'
Maximum [Member] | Performance Based Restricted Stock and Units [Domain]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Vesting term options granted	'26 months	'
Share Based Compensation Arrangement By Share Based Payment Award Performance Period	'3 years	'

Employee_Benefit_Plans_Compone

Employee Benefit Plans (Components Of Stock-Based Compensation Expense) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Defined Benefit Plan Disclosure [Line Items]	'	'
Stock-based compensation expense	$27.20	$21
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options	9.7	7.5
Operating Expenses [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Stock-based compensation expense	4.6	3.7
Selling, General and Administrative Expenses [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Stock-based compensation expense	19.4	13.8
System Development And Programming Costs [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Stock-based compensation expense	$3.20	$3.50

Employee_Benefit_Plans_Changes

Employee Benefit Plans (Changes In Stock Options Outstanding) (Details) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013
Compensation and Retirement Disclosure [Abstract]	'
Number of Options, outstanding at July 1, 2013	11,110
Number of Options, granted	52
Number of Options, exercised	-1,295
Number of Options, cancelled	-6
Number of Options, outstanding at September 30, 2013	9,861
Weighted Average Price, outstanding at July 1, 2013	$44
Weighted Average Price, granted	$74
Weighted Average Price, exercised	$40
Weighted Average Price, cancelled	$48
Weighted Average Price, outstanding at September 30, 2013	$45

Employee_Benefit_Plans_TimeBas

Employee Benefit Plans (Time-Based Restricted shares and units) (Details)	3 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
Time-Based Restricted Stock [Member]	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'
Restricted shares outstanding at July 1, 2013	1,313
Restricted shares granted	1,226
Restricted shares vested	-41
Restricted shares forfeited	-17
Restricted shares outstanding at September 30, 2013	2,481
Time Based Restricted Stock Unit [Domain]	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'
Restricted shares outstanding at July 1, 2013	280
Restricted shares granted	308
Restricted shares vested	0
Restricted shares forfeited	-1
Restricted shares outstanding at September 30, 2013	587

Employee_Benefit_Plans_Perform

Employee Benefit Plans (Performance based restricted shares and units) (Details)	3 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
Performance-Based Restricted Stock [Member]	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'
Restricted shares outstanding at July 1, 2013	521
Restricted shares granted	843
Restricted shares vested	0
Restricted shares forfeited	-11
Restricted shares outstanding at September 30, 2013	1,353
Performance Based Restricted Stock Unit [Domain]	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'
Restricted shares outstanding at July 1, 2013	38
Restricted shares granted	58
Restricted shares vested	-6
Restricted shares forfeited	-1
Restricted shares outstanding at September 30, 2013	89

Employee_Benefit_Plans_Assumpt

Employee Benefit Plans (Assumptions Used To Estimate Fair Value For Stock Options Granted) (Details) (USD $)	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Risk Free Interest Rate	1.50%	0.80%
Dividend yield	2.40%	2.70%
Weighted average volatility factor	23.60%	24.40%
Weighted average expected life (in years)	'5 years 4 months 6 days	'5 years 3 months 18 days
Weighted average fair value (in dollars)	$12.44	$8.90

Employee_Benefit_Plans_Compone1

Employee Benefit Plans (Components Of Net Pension Expense) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Compensation and Retirement Disclosure [Abstract]	'	'
Service cost - benefits earned during the period	$16.60	$16.80
Interest cost on projected benefits	15.6	13.8
Expected return on plan assets	-29.8	-27.4
Net amortization and deferral	5	7.7
Net pension expense	$7.40	$10.90

Income_Taxes_Details

Income Taxes (Details)	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Income Taxes [Abstract]	'	'
Effective Income Tax Rate Reconciliation, Percent	33.90%	35.00%

Commitments_And_Contingencies_

Commitments And Contingencies Commitment and Contingencies (Details) (USD $)	Sep. 30, 2013
In Millions, unless otherwise specified
Commitments And Contingencies [Abstract]	'
Incremental increase in Purchase Obligation due within four years	$64.50
Incremental increase in Purchase Obligation due within Five years	$43.50

Reclassification_out_of_Accumu2

Reclassification out of Accumulated Other Comprehensive Income (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013		Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]	'		'
Accumulated Other Comprehensive Income (Loss), Net of Tax	$70.50		$15.40
Other Comprehensive income before reclassification adjustments	58.1		'
Tax Effect	-5		'
Reclassification adjustments to net earnings	1.6		'
Tax Effect	0.4		'
Accumulated Translation Adjustment [Member]	'		'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'		'
Accumulated Other Comprehensive Income (Loss), Net of Tax	82.9		39.6
Other Comprehensive income before reclassification adjustments	43.3		'
Accumulated Net Unrealized Investment Gain (Loss) [Member]	'		'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'		'
Accumulated Other Comprehensive Income (Loss), Net of Tax	194.3		186.7
Other Comprehensive income before reclassification adjustments	14.8		'
Tax Effect	-5		'
Reclassification adjustments to net earnings	-3.5	[1]	'
Tax Effect	1.3		'
Accumulated Defined Benefit Plans Adjustment [Member]	'		'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'		'
Accumulated Other Comprehensive Income (Loss), Net of Tax	-206.7		-210.9
Reclassification adjustments to net earnings	5.1	[2]	'
Tax Effect	($0.90)		'
[1]	Reclassification adjustments out of AOCI are included within Other income, net, on the Statements of Consolidated Earnings.
[2]	Reclassification adjustments out of AOCI are included in net pension expense (see Note 11)

Financial_Data_By_Segment_Narr

Financial Data By Segment (Narrative) (Details)	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
		Sales Revenue, Segment [Member]
		Customer Concentration Risk [Member]
		Dealer Services [Member]
Segment Reporting Information [Line Items]	'	'
Concentration Risk, Percentage	'	11.00%
Standard reconciling rate between actual interest income earned and interest credited	4.50%	'

Financial_Data_By_Segment_Fina

Financial Data By Segment (Financial Data By Strategic Business Unit Segment) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]	'	'
Revenues	$2,839.60	$2,637.50
Earnings from Continuing Operations before Income Taxes	497.3	465.6
Employer Services [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Revenues	1,968	1,818.90
Earnings from Continuing Operations before Income Taxes	522.6	455.1
PEO Services [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Revenues	505.1	451.9
Earnings from Continuing Operations before Income Taxes	51.9	46.3
Dealer Services [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Revenues	472.8	440.1
Earnings from Continuing Operations before Income Taxes	96.8	85.8
Other Segments [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Revenues	0.1	0.7
Earnings from Continuing Operations before Income Taxes	-67.6	-47.5
Client Fund Interest [Member]	'	'
Segment Reporting Information [Line Items]	'	'
Revenues	-106.4	-74.1
Earnings from Continuing Operations before Income Taxes	($106.40)	($74.10)

Subsequent_Events_Details

Subsequent Events (Details)	12 Months Ended	3 Months Ended
	Jun. 30, 2013	Sep. 30, 2013	Sep. 30, 2013
	Reverse Repurchase Agreements [Member]	Reverse Repurchase Agreements [Member]	Commercial Paper [Member]
		Subsequent Event [Member]	Subsequent Event [Member]
Subsequent Event [Line Items]	'	'	'
Debt Instrument, Maturity Date	2-Jul-13	1-Oct-13	2-Oct-13