Automatic Data Processing (ADP) 10-Q 5 Feb 15 2015 Q2 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	6 Months Ended
	Dec. 31, 2014	Jan. 30, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Dec-14
Entity Registrant Name	AUTOMATIC DATA PROCESSING INC
Entity Central Index Key	8670
Current Fiscal Year End Date	-24
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q2
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		475,152,112

Statements_Of_Consolidated_Ear

Statements Of Consolidated Earnings (USD $)	3 Months Ended				6 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2014		Dec. 31, 2013
REVENUES:
Revenues, other than interest on funds held for clients and PEO revenues	$1,948.10		$1,876.70		$3,840.10		$3,647.60
Interest on funds held for clients	91		89.2		181.3		178.4
PEO revenues	622.2	[1]	527.8	[1]	1,213.70	[1]	1,029.70	[1]
TOTAL REVENUES	2,661.30		2,493.70		5,235.10		4,855.70
EXPENSES:
Operating expenses	1,386		1,289.80		2,749.20		2,549.30
Systems development and programming costs	148.8		138.5		295.6		271
Depreciation and amortization	52.2		50.3		104.1		99.1
TOTAL COSTS OF REVENUES	1,587		1,478.60		3,148.90		2,919.40
Selling, general and administrative expenses	590.2		578.8		1,168.30		1,116.50
Interest expense	2.2		2		4.1		3.9
TOTAL EXPENSES	2,179.40		2,059.40		4,321.30		4,039.80
Other income, net	-19.2		-27.7		-39.8		-49.7
EARNINGS FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	501.1		462		953.6		865.6
Provision for income taxes	167.1		147.8		321.6		286.5
NET EARNINGS FROM CONTINUING OPERATIONS	334		314.2		632		579.1
(Losses)/earnings from discontinued operations before income taxes	-2.5		99.1		63.1		192.8
Provision for Income Taxes	0		36.3		68.4		66.3
Net (loss)/earnings from discontinued operations	-2.5		62.8		-5.3		126.5
NET EARNINGS	$331.50		$377		$626.70		$705.60
Basic Earnings Per Share from Continuing Operations	$0.70		$0.66		$1.32		$1.21
Basic Earnings Per Share from Discontinued Operations	($0.01)		$0.13		($0.01)		$0.26
BASIC EARNINGS PER SHARE	$0.70		$0.79		$1.31		$1.47
Diluted Earnings Per Share from Continuing Operations	$0.70		$0.65		$1.31		$1.20
Diluted Earnings Per Share from Discontinued Operations	($0.01)		$0.13		($0.01)		$0.26
DILUTED EARNINGS PER SHARE	$0.69		$0.78		$1.30		$1.46
Basic weighted average shares outstanding	476.6		478.4		477.6		479.2
Diluted weighted average shares outstanding	480.3		482.8		481		483.6
Dividends declared per common share	$0.49		$0.48		$0.97		$0.92
[1]	Professional Employer Organization (“PEO”) revenues are net of direct pass-through costs, primarily consisting of payroll wages and payroll taxes, of $7,217.4 million and $6,140.4 million for the three months ended December 31, 2014 and 2013, respectively, and $12,953.6 million and $11,087.6 million for the six months ended December 31, 2014 and 2013, respectively.

Statements_Of_Consolidated_Ear1

Statements Of Consolidated Earnings (Parenthetical) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Direct pass-through costs, Professional Employer Organization revenues	$7,217.40	$6,140.40	$12,953.60	$11,087.60

Statements_of_Consolidated_Com

Statements of Consolidated Comprehensive Income (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Consolidated Statement of Comprehensive Income [Abstract]
NET EARNINGS	$331.50	$377	$626.70	$705.60
Other comprensive income:
Currency translation adjustments	-56.8	-6.8	-165.7	36.5
Unrealized net gains/(losses) on available-for-sale securities	19.4	-74.5	-74.7	-59.8
Tax effect	-6.1	25.5	27.9	20.5
Reclassification of net gains on available-for-sale securities to net earnings	-0.9	-11.6	-1.7	-15
Tax effect	0.3	4.3	0.6	5.6
Reclassification of pension liability adjustment to net earnings	5	5.2	13.2	10.3
Tax effect	-1.5	-1.9	-4.3	-2.8
Other Comprehensive (loss)/income, net of tax	-40.6	-59.8	-204.7	-4.7
Comprehensive income	$290.90	$317.20	$422	$700.90

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014		Jun. 30, 2014
In Millions, unless otherwise specified
Assets
Cash and cash equivalents	$1,850.80	[1]	$1,585.90	[1]
Short-term marketable securities	101.9	[1]	2,032.20	[1]
Accounts receivable, net	1,595.60		1,503.70
Other current assets	860.7		690.7
Assets of discontinued operations	0		2,409.70
Total current assets before funds held for clients	4,409		8,222.20
Funds held for clients	34,707		19,258
Total current assets	39,116		27,480.20
Long-term marketable securities	46.3		54.1
Long-term receivables, net	32		155.4
Property, Plant and Equipment, net	650.3		667.7
Other assets	1,325.80		1,316.40
Goodwill	1,833.40		1,887.20
Intangible assets, net	499.3		498.8
Total assets	43,503.10		32,059.80
Liabilities and Stockholders' Equity
Accounts payable	136.4		152.5
Accrued expenses and other current liabilities	1,163.90		1,187.60
Accrued payroll and payroll-related expenses	502.8		607.9
Dividends payable	232		226.9
Short-term deferred revenues	232.8		251.7
Obligation under commercial paper borrowing	0	[1]	2,173	[1]
Income taxes payable	41.2		20.4
Liabilities of discontinued operations	0		581.2
Total current liabilities before client funds obligations	2,309.10		5,201.20
Client funds obligations	34,461.10		18,963.40
Total current liabilities	36,770.20		24,164.60
Long-term debt	10.3		11.5
Other liabilities	629.6		619.6
Deferred income taxes	238.1		218
Long-term deferred revenues	362.7		375.9
Total liabilities	38,010.90		25,389.60
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 December 31, 2014 and June 30, 2014; outstanding, 477.1 and 480.2 shares at December 31, 2014 and June 30, 2014, respectively	63.9		63.9
Capital in excess of par value	584.1		545.2
Retained earnings	13,090.20		13,632.90
Treasury stock - at cost: 161.6 and 158.5 shares at December 31, 2014 and June 30, 2014, respectively	-8,131.30		-7,750
Accumulated other comprehensive income	-114.7		178.2
Total stockholders' equity	5,492.20		6,670.20
Total liabilities and stockholders' equity	$43,503.10		$32,059.80
[1]	As of June 30, 2014, $2,015.8 million of short-term marketable securities and $183.8 million of cash and cash equivalents are related to the Company's outstanding commercial paper borrowings (see Note 9).

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Jun. 30, 2014
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	477,100,000	480,200,000
Treasury stock, shares	161,600,000	158,500,000
Short-term Investments [Member]
Assets related to the Company's outstanding commercial paper		$2,015.80
Cash and Cash Equivalents [Domain]
Assets related to the Company's outstanding commercial paper		$183.80

Statements_Of_Consolidated_Cas

Statements Of Consolidated Cash Flows (USD $)	6 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Statement of Cash Flows [Abstract]
NET EARNINGS	$626.70		$705.60
Adjustments to reconcile net earnings to cash flows provided by operating activities:
Depreciation and amortization	138		131
Deferred income taxes	-8.4		-6.3
Stock-based compensation expense	75.1		56.6
Excess tax benefit related to exercise of stock options and restricted stock	-48.4		-44.9
Net pension expense	9.8		12.4
Net realized gain from the sales of marketable securities	-1.7		-15
Net amortization of premiums and accretion of discounts on available-for-sale securities	50.3		46.2
Other	-6.7		11.6
Changes in operating assets and liabilities, net of effects from acquisitions and divestitures of businesses:
Increase in accounts receivable	-185.2		-106.1
Increase in other assets	-205		-306.7
Decrease in accounts payable	-9.7		-13
(Decrease)/Increase in accrued expenses and other liabilities	-50.7		4.9
Proceeds from the sale of notes receivable	225.5		0
Operating activities of discontinued operations	-2.5		-3.3
Net cash flows provided by operating activities	607.1		473
Cash Flows from Investing Activities:
Purchases of corporate and client funds marketable securities	-1,851.10		-1,231.90
Proceeds from the sales and maturities of corporate and client funds marketable securities	1,372.40		1,046.10
Net increase in restricted cash and cash equivalents held to satisfy client funds obligations	-13,380.90		-5,842.10
Capital expenditures	-80.8		-68.8
Additions to intangibles	-84.5		-71.4
Acquisitions of businesses, net of cash acquired	-8.1		0
Proceeds from the sale of property, plant, and equipment and other assets	23.6		0
Dividend received from CDK Global, Inc.	825		0
Cash retained by CDK Global, Inc.	-180		0
Investing activities of discontinued operations	-15.4		-55.7
Net cash flows used in investing activities	-13,379.80		-6,223.80
Cash Flows from Financing Activities:
Net increase in client funds obligations	15,721.50		6,245.50
Payments of debt	-1.2		-2.1
Repurchases of common stock	-462.2		-417.2
Proceeds from stock purchase plan and exercises of stock options	28.8		102.6
Excess tax benefit related to exercise of stock options and restricted stock	48.4		44.9
Dividends paid	-461.3		-420.8
Net repayments of reverse repurchase agreements	0		-245.9
Net repayments of commercial paper borrowings	-2,173		0
Other	0		-1
Financing activities of discontinued operations	1.6		11.1
Net cash flows provided by financing activities	12,702.60		5,317.10
Effect of exchange rate changes on cash and cash equivalents	-62.7		1.7
Net change in cash and cash equivalents	-132.8		-432
Cash and cash equivalents, beginning of period	1,983.60		1,699.10
Cash and cash equivalents, end of period	1,850.80		1,267.10
Cash	0		315.6
Cash and cash equivalents of continuing operations, end of period	$1,850.80	[1]	$951.50
[1]	As of June 30, 2014, $2,015.8 million of short-term marketable securities and $183.8 million of cash and cash equivalents are related to the Company's outstanding commercial paper borrowings (see Note 9).

Basis_of_Presentation_Notes

Basis of Presentation (Notes)	6 Months Ended
	Dec. 31, 2014
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 presentation 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. The Consolidated Financial Statements and all relevant footnotes have been adjusted for discontinued operations (see Note 3).
	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, 2014 (“fiscal 2014”).

New_Accounting_Pronouncements_

New Accounting Pronouncements (Notes)	6 Months Ended
	Dec. 31, 2014
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncements	Note 2.  New Accounting Pronouncements
	In May 2014, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2014-09, "Revenue from Contracts with Customers," which outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. ASU 2014-09 requires an entity to recognize revenue depicting the transfer of goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. ASU 2014-09 will also result in enhanced revenue related disclosures. ASU 2014-09 is effective for fiscal years, and interim reporting periods within those years, beginning after December 15, 2016. The Company has not yet determined the impact of ASU 2014-09 on its consolidated results of operations, financial condition, or cash flows.
	In April 2014, the FASB issued ASU 2014-08, "Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity." ASU 2014-08 requires that a disposal representing a strategic shift that has (or will have) a major effect on an entity’s financial results or a business activity classified as held for sale should be reported as discontinued operations. ASU 2014-08 also expands the disclosure requirements for discontinued operations and adds new disclosures for individually significant dispositions that do not qualify as discontinued operations. ASU 2014-08 is effective prospectively for fiscal years, and interim reporting periods within those years, beginning after December 15, 2014. The impact of ASU 2014-08 is dependent upon the nature of dispositions, if any, after adoption.
	In July 2014, the Company adopted 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. The adoption of ASU 2013-11 did not have a material impact on the Company's consolidated results of operations, financial condition, or cash flows.

Divestiture

Divestiture	6 Months Ended
	Dec. 31, 2014
Discontinued Operations and Disposal Groups [Abstract]
Divestiture	Note 3. Divestitures
	On September 30, 2014, the Company completed the tax free spin-off of its former Dealer Services business, which was a separate reportable segment, into an independent publicly traded company called CDK Global, Inc. ("CDK"). As a result of the spin-off, ADP stockholders of record on September 24, 2014 (the "record date") received one share of CDK common stock on September 30, 2014, par value $0.01 per share, for every three shares of ADP common stock held by them on the record date and cash for any fractional shares of CDK common stock. ADP distributed approximately 160.6 million shares of CDK common stock in the distribution. The spin-off was made without the payment of any consideration or the exchange of any shares by ADP stockholders.
	The Company recorded a decrease to retained earnings of $1.5 billion for the reduction in net assets of CDK related to the spin-off, offset by an increase to retained earnings of $825.0 million related to the cash dividend received from CDK as part of the spin-off. The spin-off, transitional, and on-going relationships between ADP and CDK are governed by the Separation and Distribution Agreement entered into between ADP and CDK and certain other ancillary agreements.
	Incremental costs associated with the spin-off of $2.5 million for the three months ended December 31, 2014 and $45.3 million for the six months ended December 31, 2014 are included in discontinued operations on the Statements of Consolidated Earnings and are principally related to professional fees.
	On February 28, 2014, the Company completed the sale of its Occupational Health and Safety services business ("OHS") for a pre-tax gain of $15.6 million, less costs to sell, and recorded such gain within earnings from discontinued operations on the Statements of Consolidated Earnings in the three months ended March 31, 2014. OHS was previously reported in the Employer Services segment.
	In conjunction with the spin-off of CDK and the sale of OHS, the Company has classified the operating results of these businesses as discontinued operations for all periods presented. The operating results for these businesses were as follows:
		Three Months Ended					Six Months Ended
		December 31,					December 31,
		2014			2013		2014			2013
	Revenues	$	—		$	489.1	$	508.9		$	966.7
	(Losses)/earnings from discontinued operations before income taxes	(2.5		)	99.1		63.1			192.8
	Provision for income taxes	—			36.3		68.4			66.3
	Net (loss)/earnings from discontinued operations	$	(2.5	)	$	62.8	$	(5.3	)	$	126.5
	The following is a summary of the assets and liabilities related to discontinued operations as of June 30, 2014:
		June 30, 2014
	Assets:
	Cash	$	397.7
	Accounts receivable, net	296.7
	Property, plant and equipment, net	109.7
	Goodwill	1,226.60
	Intangible assets, net	133.5
	Other assets	245.5
	Total assets	$	2,409.70
	Liabilities:
	Accounts payable	$	17.2
	Accrued expenses and other current liabilities	128.1
	Accrued payroll and payroll related expenses	99.2
	Deferred revenues	218.2
	Deferred income taxes	70.8
	Other liabilities	47.7
	Total liabilities	$	581.2

Earnings_per_Share_Notes

Earnings per Share (Notes)	6 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Earnings Per Share [Text Block]	Note 4.  Earnings per Share (“EPS”)
		Basic		Effect of Employee Stock Option Shares	Effect of	Diluted
					Employee
					Restricted
					Stock
					Shares
	Three Months Ended December 31, 2014
	Net earnings from continuing operations	$	334			$	334
	Weighted average shares (in millions)	476.6		2.1	1.6	480.3
	EPS from continuing operations	$	0.7			$	0.7
	Three Months Ended December 31, 2013
	Net earnings from continuing operations	$	314.2			$	314.2
	Weighted average shares (in millions)	478.4		2.9	1.5	482.8
	EPS from continuing operations	$	0.66			$	0.65
	Six Months Ended December 31, 2014
	Net earnings from continuing operations	$	632			$	632
	Weighted average shares (in millions)	477.6		2.1	1.4	481
	EPS from continuing operations	$	1.32			$	1.31
	Six Months Ended December 31, 2013
	Net earnings from continuing operations	$	579.1			$	579.1
	Weighted average shares (in millions)	479.2		3	1.4	483.6
	EPS from continuing operations	$	1.21			$	1.2
	Options to purchase 0.1 million shares of common stock for the three months ended December 31, 2013 and 0.1 million shares of common stock for the six months ended December 31, 2013 were excluded from the calculation of diluted earnings per share because their inclusion would have been anti-dilutive.

Other_Income_net

Other Income, net	6 Months Ended
	Dec. 31, 2014
Other Income, Net [Abstract]
Other Income, net	Note 5. Other Income, Net
		Three Months Ended						Six Months Ended
		December 31,						December 31,
		2014			2013			2014			2013
	Interest income on corporate funds	$	(18.3	)	$	(16.1	)	$	(36.7	)	$	(34.6	)
	Realized gains on available-for-sale securities	(1.7		)	(13.2		)	(2.7		)	(17.5		)
	Realized losses on available-for-sale securities	0.8			1.6			1			2.5
	Gain on the sale of notes receivable	—			—			(1.4		)	—
	Other, net	—			—			—			(0.1		)
	Other income, net	$	(19.2	)	$	(27.7	)	$	(39.8	)	$	(49.7	)
	During the six months ended December 31, 2014, the Company sold notes receivable related to Dealer Services financing arrangements for a gain of $1.4 million. Refer to Note 7 for further information.

Corporate_Investments_And_Fund

Corporate Investments And Funds Held For Clients	6 Months Ended
	Dec. 31, 2014
Corporate Investments And Funds Held For Clients [Abstract]
Corporate Investments And Funds Held For Clients	Note 6. Corporate Investments and Funds Held for Clients
	Corporate investments and funds held for clients at December 31, 2014 and June 30, 2014 were as follows:
		December 31, 2014
		Amortized			Gross			Gross			Fair Value (A)
		Cost			Unrealized			Unrealized
					Gains			Losses
	Type of issue:
	Money market securities, cash and other cash equivalents	$	16,377.80		$	—		$	—		$	16,377.80
	Available-for-sale securities:
	Corporate bonds	8,842.00			132.7			(16.5		)	8,958.20
	U.S. Treasury and direct obligations of	5,940.20			73.8			(9.5		)	6,004.50
	U.S. government agencies
	Asset-backed securities	2,190.80			6.3			(8.8		)	2,188.30
	Canadian government obligations and	968.8			9.2			—			978
	Canadian government agency obligations
	Canadian provincial bonds	720.8			25.7			(1.2		)	745.3
	Municipal bonds	549.2			17.2			(0.4		)	566
	Other securities	868.4			19.9			(0.4		)	887.9
	Total available-for-sale securities	20,080.20			284.8			(36.8		)	20,328.20
	Total corporate investments and funds held for clients	$	36,458.00		$	284.8		$	(36.8	)	$	36,706.00
	(A) Included within available-for-sale securities are corporate investments with fair values of $148.2 million and funds held for clients with fair values of $20,180.0 million. All available-for-sale securities were included in Level 2.
		June 30, 2014
		Amortized			Gross			Gross			Fair Value (B)
		Cost			Unrealized			Unrealized
					Gains			Losses
	Type of issue:
	Money market securities, cash and other cash equivalents	$	2,773.70		$	—		$	—		$	2,773.70
	Available-for-sale securities:
	Corporate bonds	8,720.10			171.1			(15.0		)	8,876.20
	U.S. Treasury and direct obligations of	6,051.40			107.3			(11.7		)	6,147.00
	U.S. government agencies
	Asset-backed securities	1,822.60			6.1			(6.9		)	1,821.80
	Canadian government obligations and	1,031.40			7.6			(0.8		)	1,038.20
	Canadian government agency obligations
	Canadian provincial bonds	747.7			25.3			(2.5		)	770.5
	Municipal bonds	543.3			19.4			(0.5		)	562.2
	Other securities	915.6			25.7			(0.7		)	940.6
	Total available-for-sale securities	19,832.10			362.5			(38.1		)	20,156.50
	Total corporate investments and funds held for clients	$	22,605.80		$	362.5		$	(38.1	)	$	22,930.20
	(B) Included within available-for-sale securities are corporate investments with fair values of $2,086.3 million and funds held for clients with fair values of $18,070.2 million. All 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 2014. The Company did not transfer any assets between Level 1 and Level 2 during the six months ended December 31, 2014 or the year ended June 30, 2014. 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 1 or Level 3 as of December 31, 2014.
	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 December 31, 2014, are as follows:
		December 31, 2014
		Securities in unrealized loss position less than 12 months						Securities in unrealized loss position greater than 12 months					Total
		Unrealized			Fair market			Unrealized			Fair market		Gross			Fair
		losses			value			losses			value		unrealized			market value
													losses
	Corporate bonds	$	(4.8	)	$	1,165.00		$	(11.7	)	$	836.1	$	(16.5	)	$	2,001.10
	U.S. Treasury and direct obligations of	(1.3		)	492.5			(8.2		)	646.5		(9.5		)	1,139.00
	U.S. government agencies
	Asset-backed securities	(2.1		)	733.8			(6.7		)	526.9		(8.8		)	1,260.70
	Canadian government obligations and	—			43.3			—			—		—			43.3
	Canadian government agency obligations
	Canadian provincial bonds	(0.4		)	94.6			(0.8		)	71.5		(1.2		)	166.1
	Municipal bonds	(0.3		)	88.7			(0.1		)	9		(0.4		)	97.7
	Other securities	—			5.6			(0.4		)	30.8		(0.4		)	36.4
		$	(8.9	)	$	2,623.50		$	(27.9	)	$	2,120.80	$	(36.8	)	$	4,744.30
	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, 2014, are as follows:
		June 30, 2014
		Securities in unrealized loss position less than 12 months						Securities in unrealized loss position greater than 12 months					Total
		Unrealized			Fair market			Unrealized			Fair market		Gross			Fair
		losses			value			losses			value		unrealized			market value
													losses
	Corporate bonds	$	(0.9	)	$	313.8		$	(14.1	)	$	1,026.00	$	(15.0	)	$	1,339.80
U.S. Treasury and direct obligations of U.S. government agencies	(0.3		)	84.6			(11.4		)	944.8		(11.7		)	1,029.40
Asset-backed securities	(0.7		)	325.4			(6.2		)	555.5		(6.9		)	880.9
Canadian government obligations and	(0.8		)	127.2			—			—		(0.8		)	127.2
Canadian government agency obligations
Canadian provincial bonds	(0.9		)	75.2			(1.6		)	118.6		(2.5		)	193.8
Municipal bonds	(0.1		)	42			(0.4		)	22.6		(0.5		)	64.6
Other securities	—			13.9			(0.7		)	45.7		(0.7		)	59.6
	$	(3.7	)	$	982.1		$	(34.4	)	$	2,713.20	$	(38.1	)	$	3,695.30
At December 31, 2014, Corporate bonds include investment-grade debt securities with a wide variety of issuers, industries, and sectors, primarily carry credit ratings of A and above, and have maturities ranging from January 2015 to June 2023.
At December 31, 2014, 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 $4,530.1 million and $1,022.0 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 have maturities ranging from January 2015 through August 2024.
At December 31, 2014, asset-backed securities include AAA rated senior tranches of securities with predominantly prime collateral of fixed rate credit card, auto loan, and rate reduction receivables with fair values of $1,548.2 million, $364.4 million, and $205.3 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 December 31, 2014.
At December 31, 2014, other securities and their fair value primarily represent: AAA and AA rated supranational bonds of $383.0 million, AAA and AA rated sovereign bonds of $319.9 million, and AA rated mortgage-backed securities of $100.8 million that are guaranteed primarily by Federal National Mortgage Association ("Fannie Mae"). 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 as to the timely payment of principal and interest.
Classification of corporate investments on the Consolidated Balance Sheets is as follows:
		December 31,			June 30,
		2014			2014
Corporate investments:
Cash and cash equivalents		$	1,850.80		$	1,585.90
Short-term marketable securities		101.9			2,032.20
Long-term marketable securities		46.3			54.1
Total corporate investments		$	1,999.00		$	3,672.20
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:
		December 31,			June 30,
		2014			2014
Funds held for clients:
Restricted cash and cash equivalents held to satisfy client funds obligations		$	14,527.00		$	1,187.80
Restricted short-term marketable securities held to satisfy client funds obligations		4,595.70			1,312.50
Restricted long-term marketable securities held to satisfy client funds obligations		15,584.30			16,757.70
Total funds held for clients		$	34,707.00		$	19,258.00
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 $34,461.1 million and $18,963.4 million as of December 31, 2014 and June 30, 2014, 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 increase in client funds obligations in the financing activities section of the Statements of Consolidated Cash Flows.
Approximately 82% of the available-for-sale securities held a AAA or AA rating at December 31, 2014, 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 December 31, 2014.
Expected maturities of available-for-sale securities at December 31, 2014 are as follows:
One year or less	$	4,697.50
One year to two years	3,754.40
Two years to three years	3,092.00
Three years to four years	2,098.30
After four years	6,686.00
Total available-for-sale securities	$	20,328.20

Receivables

Receivables	6 Months Ended
	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable, Classified [Abstract]
Receivables	Note 7. 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. 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, and internal assessments of credit quality, 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 trade and accounts receivables, whose carrying value approximates fair value, are as follows:
		December 31, 2014						June 30, 2014
		Current			Long-term			Current			Long-term
	Trade receivables	$	1,613.70		$	—		$	1,457.70		$	—
	Notes receivable	18.5			33.5			94.8			169.9
	Less:
	Allowance for doubtful accounts - trade receivables	(35.5		)	—			(38.1		)	—
	Allowance for doubtful accounts - notes receivable	(0.4		)	(0.6		)	(4.7		)	(8.3		)
	Unearned income - notes receivable	(0.7		)	(0.9		)	(6.0		)	(6.2		)
		$	1,595.60		$	32		$	1,503.70		$	155.4
	During the six months ended December 31, 2014, the Company sold notes receivable related to Dealer Services financing arrangements for $225.5 million. Although the sale of the notes receivable transfers the majority of the risk to the purchaser, the Company does retain a minimal level of credit risk on the sold receivables. The cash received in exchange for the notes receivable sold was recorded within the operating activities on the Statements of Consolidated Cash Flows and the gain on sale realized was recorded within Other income, net on the Statements of Consolidated Earnings (see Note 5).
	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. As of December 31, 2014 and June 30, 2014, there were no notes receivable that were specifically reserved; the entire notes receivable reserve balance was comprised of non-specific reserves.
	The rollforward of the allowance for doubtful accounts related to notes receivable is as follows:
		Current			Long-term
	Balance at June 30, 2014	$	4.7		$	8.3
	Net provision	0.3			0.6
	Chargeoffs	(0.2		)	(0.3		)
	Recoveries and other (A)	(4.4		)	(8.0		)
	Balance at December 31, 2014	$	0.4		$	0.6
	(A) As a result of the sale of the notes receivable related to Dealer Services financing arrangements, the Company released $10.7 million of non-specific reserves that were accrued on the sold notes receivable, which was recorded in selling, general, and administrative expenses on the Statements of Consolidated Earnings.
	The allowance for doubtful accounts as a percentage of notes receivable was approximately 2% as of December 31, 2014 and 5% as of June 30, 2014.
	On an ongoing basis, the Company evaluates the credit quality of its financing receivables, utilizing aging of receivables, collection experience, and charge-offs. As events related to a specific client dictate, the credit quality of a client is reevaluated. Approximately 100% of notes receivable were current at December 31, 2014 and June 30, 2014.

Goodwill_And_Intangible_Assets

Goodwill And Intangible Assets, Net	6 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill And Intangible Assets, Net	Note 8. Goodwill and Intangibles Assets, net
	Changes in goodwill for the six months ended December 31, 2014 are as follows:
		Employer				PEO				Total
		Services				Services
	Balance at June 30, 2014 (A)	$	1,882.40			$	4.8			$	1,887.20
	Additions and other adjustments, net	6.8				—				6.8
	Currency translation adjustments	(60.6		)		—				(60.6		)
	Balance at December 31, 2014 (A)	$	1,828.60			$	4.8			$	1,833.40
	(A) The goodwill balance at June 30, 2014 and December 31, 2014 is net of accumulated impairment losses of $42.7 million related to the Employer Services segment.
	Components of intangible assets, net, are as follows:
			December 31,				June 30,
			2014				2014
	Intangible assets:
	Software and software licenses		$	1,582.30			$	1,523.20
	Customer contracts and lists		638.3				648.7
	Other intangibles		209				208.3
			2,429.60				2,380.20
	Less accumulated amortization:
	Software and software licenses		(1,267.6		)		(1,231.2		)
	Customer contracts and lists		(473.8		)		(467.1		)
	Other intangibles		(188.9		)		(183.1		)
			(1,930.3		)		(1,881.4		)
	Intangible assets, net		$	499.3			$	498.8
	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 6 years (4 years for software and software licenses, 10 years for customer contracts and lists, and 3 years for other intangibles).  Amortization of intangible assets was $38.2 million and $34.4 million for the three months ended December 31, 2014 and 2013, respectively, and $75.8 million and $70.1 million for the six months ended December 31, 2014 and 2013, respectively.
	Estimated future amortization expenses of the Company's existing intangible assets are as follows:
		Amount
	Six months ending June 30, 2015	$	71.4
	Twelve months ending June 30, 2016	$	129.3
	Twelve months ending June 30, 2017	$	100.4
	Twelve months ending June 30, 2018	$	52.8
	Twelve months ending June 30, 2019	$	39.1
	Twelve months ending June 30, 2020	$	30.5

ShortTerm_Financing

Short-Term Financing	6 Months Ended
	Dec. 31, 2014
Short-Term Financing [Abstract]
Short-Term Financing	Note 9. Short-term Financing
	The Company has a $2.25 billion, 364-day credit agreement with a group of lenders that matures in June 2015.  In addition, the Company has a five-year $2.0 billion credit facility and a five-year $3.25 billion credit facility maturing in June 2018 and June 2019, respectively, each with 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 effective federal funds 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 December 31, 2014 under the credit agreements.
	The Company’s U.S. short-term funding requirements related to client funds are sometimes obtained through a commercial paper program, which provides for the issuance of up to $7.5 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 December 31, 2014, the Company had no commercial paper outstanding. At June 30, 2014, the Company had $2,173.0 million of commercial paper outstanding, which was repaid on July 1, 2014. For the three months ended December 31, 2014 and 2013, the Company's average borrowings were $3.0 billion and $3.3 billion, respectively, at weighted average interest rates of 0.1%. For the six months ended December 31, 2014 and 2013, the Company's average borrowings were $3.1 billion and $3.2 billion, respectively, at weighted average interest rates of 0.1%. The weighted average maturity of the Company’s commercial paper issued during the three and six months ended December 31, 2014 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.  At December 31, 2014 and June 30, 2014, the Company had no obligations outstanding related to reverse repurchase agreements. For the three months ended December 31, 2014 and 2013, the Company had average outstanding balances under reverse repurchase agreements of $598.6 million and $402.0 million, respectively, at weighted average interest rates of 0.5% and 0.6%, respectively. For the six months ended December 31, 2014 and 2013, the Company had average outstanding balances under reverse repurchase agreements of $584.7 million and $465.7 million, respectively, at weighted average interest rates of 0.5%. In addition, the Company has $3.25 billion available on a committed basis under the U.S. reverse repurchase agreements.

Employee_Benefit_Plans

Employee Benefit Plans	6 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plans	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 the year ended June 30, 2013 ("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 and cannot be transferred during the vesting period. 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 recognized over the vesting period based on the fair value of the award on the grant date with subsequent adjustments to the number of shares awarded during the performance period based on probable and actual performance against targets. After the performance period, if the performance targets are achieved, employees are eligible to receive dividends during the remaining vesting period on shares awarded under the performance-based restricted stock program.
	Performance-based restricted stock units are settled in either cash or stock, depending on the employee's home country, and cannot be transferred during the vesting period. Compensation expense relating to the issuance of performance-based restricted stock units settled in cash is recognized over the vesting period initially based on the fair value of the award on the grant date with subsequent adjustments to the number of units awarded during the performance period based on probable and actual performance against targets. In addition, compensation expense is remeasured at each reporting period during the vesting period based on the change in ADP stock price. Compensation expense relating to the issuance of performance-based restricted stock units settled in stock is recorded over the vesting period based on the fair value of the award on the grant date with subsequent adjustments to the number of units awarded based on the probable and actual performance against targets. Dividend equivalents are paid on awards settled in stock 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 5.2 million shares in the three months ended December 31, 2014 as compared to 1.4 million shares repurchased in the three months ended December 31, 2013 and the Company repurchased 5.7 million shares in the six months ended December 31, 2014 as compared to 5.6 million shares repurchased in the six months ended December 31, 2013. 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 and six months ended December 31, 2014 and 2013, respectively:
		Three Months Ended						Six Months Ended
		December 31,						December 31,
		2014			2013			2014			2013
	Operating expenses	$	7.5		$	6.3		$	15.1		$	10.2
	Selling, general and administrative expenses	23.3			22.1			48.9			38.8
	System development and programming costs	5.5			4.9			11.1			7.6
	Total pretax stock-based compensation expense	$	36.3		$	33.3		$	75.1		$	56.6
	Income tax benefit	$	12.8		$	11.9		$	26.7		$	20.3
	Stock-based compensation expense attributable to CDK employees are included in discontinued operations and therefore not presented in the table above. For the three months ended December 31, 2013, such stock-based compensation expense was $5.9 million. For the six months ended December 31, 2014 and 2013, such stock-based compensation expense was $5.1 million and $9.8 million, respectively.
	As a result of the spin-off of CDK, the number of vested and unvested ADP stock options, their strike price, and the number of unvested performance-based and time-based restricted shares and units were adjusted to preserve the intrinsic value of the awards immediately prior to the spin-off using an adjustment ratio based on the market close price of ADP stock prior to the spin-off and the market open price of ADP stock subsequent to the spin-off. Since these adjustments were considered to be a modification of the awards in accordance to ASC 718, the Company compared the fair value of the awards immediately prior to the spin-off to the fair value immediately after the spin-off to measure potential incremental stock-based compensation expense, if any. The adjustments did not result in an increase in the fair value of the awards and, accordingly, the Company did not record incremental stock-based compensation expense. Unvested ADP stock options, unvested restricted stock, and unvested restricted stock units held by CDK employees were replaced by CDK awards immediately following the spin-off. The stock-based compensation expense associated with the original grant of ADP awards to remaining ADP employees will continue to be recognized within earnings from continuing operations in the Company's Statement of Consolidated Earnings.
	As of December 31, 2014, the total remaining unrecognized compensation expense related to non-vested stock options, restricted stock units, and restricted stock awards amounted to $8.3 million, $23.9 million, and $131.0 million, respectively, which will be amortized over the weighted-average remaining requisite service periods of 1.7 years, 1.4 years, and 1.6 years, respectively.
	During the six months ended December 31, 2014, the following activity occurred under the Company’s existing plans, including the impacts related to the spin-off of CDK, described above.
	Stock Options:
			Number		Weighted
			of Options		Average Price
			(in thousands)		(in dollars)
	Options outstanding at July 1, 2014		7,931		$	52
	Options granted		13		$	83
	Options exercised		(1,258	)	$	40
	Options canceled		(119	)	$	57
	Options increased for spin-off adjustment ratio		849		$	47
	CDK employee options replaced at spin-off with CDK awards		(823	)	$	54
	Options outstanding at December 31, 2014		6,593		$	47
	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, 2014		2,341		571
	Restricted shares/units granted		903		215
	Restricted shares/units vested		(1,068	)	(250	)
	Restricted shares/units forfeited		(87	)	(32	)
	Share/unit increase for spin-off adjustment ratio		267		64
	CDK employee restricted shares/units replaced at spin-off with CDK awards		(189	)	(43	)
	Restricted shares/units outstanding at December 31, 2014		2,167		525
	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, 2014		803		318
	Restricted shares/units granted		339		217
	Restricted shares/units vested		(223	)	(13	)
	Restricted shares/units forfeited		(44	)	(10	)
	Share/unit increase for spin-off adjustment ratio		118		67
	CDK employee restricted shares/units replaced at spin-off with CDK awards		(45	)	(35	)
	Restricted shares/units outstanding at December 31, 2014		948		544
	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:
		Six Months Ended
		December 31,
		2014			2013
	Risk-free interest rate	1.9		%	1.5		%
	Dividend yield	2.3		%	2.4		%
Weighted average volatility factor	22.8		%	23.6		%
Weighted average expected life (in years)	5.4			5.4
Weighted average fair value (in dollars) (A)	$	12.45		$	10.94
(A) The weighted average fair values were adjusted to reflect the impact of the spin-off of CDK.
B.  Pension Plans
The components of net pension expense were as follows:
	Three Months Ended						Six Months Ended
	December 31,						December 31,
	2014			2013			2014			2013
Service cost – benefits earned during the period	$	16.5		$	16.6		$	35.7		$	33.2
Interest cost on projected benefits	15.7			15.7			31.5			31.3
Expected return on plan assets	(32.5		)	(29.9		)	(65.0		)	(59.7		)
Net amortization and deferral	4.3			5			8.7			10
Curtailments and special termination benefits	—			—			3.2			—
Net pension expense	$	4		$	7.4		$	14.1		$	14.8
Net pension expense for the three months ended December 31, 2013 includes $1.2 million reported within earnings from discontinued operations on the Statement of Consolidated Earnings and net pension expense for the six months ended December 31, 2014 and 2013 includes $4.3 million and $2.4 million, respectively, reported within earnings from discontinued operations on the Statements of Consolidated Earnings. Included within pension expense related to discontinued operations for the six months ended December 31, 2014 were total one-time charges of $3.2 million for curtailment charges and special termination benefits directly attributable to the spin-off of CDK.

Income_Taxes

Income Taxes	6 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	Note 11. Income Taxes
	The effective tax rate for the three months ended December 31, 2014 and 2013 was 33.3% and 32.0%, respectively. The increase in the effective tax rate is due to the resolution of certain tax matters during the three months ended December 31, 2013, partially offset by income tax benefits in the three months ended December 31, 2014 related to the usage of foreign tax credits in a planned repatriation of foreign earnings and a change in tax law.
	The effective tax rate for the six months ended December 31, 2014 and 2013 was 33.7% and 33.1%, respectively. The increase in the effective tax rate is due to the resolution of certain tax matters during the six months ended December 31, 2013, partially offset by income tax benefits in the six months ended December 31, 2014 related to the usage of foreign tax credits in a planned repatriation of foreign earnings, a change in tax law, and adjustments to the tax liability.

Commitments_And_Contingencies

Commitments And Contingencies	6 Months Ended
	Dec. 31, 2014
Commitments And Contingencies [Abstract]
Commitments And Contingencies	Note 12. Commitments and Contingencies
	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.
	On July 18, 2011, athenahealth, Inc. filed a complaint against ADP AdvancedMD, Inc. (“ADP AdvancedMD”), a subsidiary of the Company. The complaint alleged 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 infringed two patents owned by athenahealth, Inc. The complaint sought monetary damages, injunctive relief, and costs. In November 2014, the parties entered into a settlement agreement to end this litigation and dismiss all claims and counterclaims.  The terms of the settlement did not have a material adverse impact on the Company's results of operations, financial condition or cash flows.
	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. Although the Company currently believes that resolving its outstanding claims, individually or in aggregate, will not have a material adverse impact on the consolidated financial statements, these matters involve complex issues subject to inherent uncertainty and there can be no assurance that these matters will be resolved in a manner 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.
	As a result of the CDK spin-off, the Company's obligations decreased from those disclosed in the Annual Report on Form 10-K for fiscal 2014 as certain of these obligations were assumed by CDK. The minimum commitments related to CDK on June 30, 2014 for various facilities and equipment leases and software license agreements were as follows:
	Years ending June 30,
	2015	$	32
	2016	22.1
	2017	12.7
	2018	5.2
	2019	3.8
	Thereafter	5.6
		$	81.4
	CDK also had obligations related to purchase and maintenance agreements on software, equipment, and other assets of which $2.9 million, $4.1 million, and $2.4 million relates to fiscal years ending June 30, 2015, 2016, and 2017, respectively, which were assumed by CDK as part of the spin-off.
	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 fiscal 2014. In December 2014, the Company extended the term of a contract, which resulted in incremental obligations of $43.1 million and $87.3 million for the fiscal years ending June 30, 2019 and June 30, 2020, respectively.

Foreign_Currency_Risk_Manageme

Foreign Currency Risk Management (Notes)	6 Months Ended
	Dec. 31, 2014
Foreign Currency Risk Management [Abstract]
Fair Value, Concentration of Risk [Table Text Block]	Note 13. 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 December 31, 2014 or June 30, 2014.

Reclassification_out_of_Accumu

Reclassification out of Accumulated Other Comprehensive Income (Notes)	6 Months Ended
	Dec. 31, 2014
Reclassification out of Accumulated Other Comprehensive Income [Abstract]
Reclassification out of Accumulated Other Comprehensive Income (AOCI)	Reclassifications out of Accumulated Other Comprehensive Income ("AOCI")
	Changes in AOCI by component are as follows:
		Three Months Ended
		December 31, 2014
		Currency Translation Adjustment				Net Gains/Losses on Available-for-sale Securities				Pension Liability				Accumulated Other Comprehensive Income
	Balance at September 30, 2014	$	(97.6	)		$	151			$	(127.5	)		$	(74.1	)
	Other comprehensive (loss)/income	(56.8		)		19.4				—				(37.4		)
	before reclassification adjustments
	Tax effect	—				(6.1		)		—				(6.1		)
	Reclassification adjustments to	—				(0.9		)	(A)	5			(B)	4.1
	net earnings
	Tax effect	—				0.3				(1.5		)		(1.2		)
	Balance at December 31, 2014	$	(154.4	)		$	163.7			$	(124.0	)		$	(114.7	)
		Three Months Ended
		December 31, 2013
		Currency Translation Adjustment				Net Gains/Losses on Available-for-sale Securities				Pension Liability				Accumulated Other Comprehensive Income
	Balance at September 30, 2013	$	82.9			$	194.3			$	(206.7	)		$	70.5
	Other comprehensive loss	(6.8		)		(74.5		)		—				(81.3		)
	before reclassification adjustments
	Tax effect	—				25.5				—				25.5
	Reclassification adjustments to	—				(11.6		)	(A)	5.2			(B)	(6.4		)
	net earnings
	Tax effect	—				4.3				(1.9		)		2.4
	Balance at December 31, 2013	$	76.1			$	138			$	(203.4	)		$	10.7
		Six Months Ended
		December 31, 2014
		Currency Translation Adjustment				Net Gains/Losses on Available-for-sale Securities				Pension Liability				Accumulated Other Comprehensive Income
	Balance at June 30, 2014	$	99.5			$	211.6			$	(132.9	)		$	178.2
	Other comprehensive loss	(165.7		)		(74.7		)		—				(240.4		)
	before reclassification adjustments
	Tax effect	—				27.9				—				27.9
	Reclassification adjustments to	—				(1.7		)	(A)	13.2			(B)	11.5
	net earnings
	Tax effect	—				0.6				(4.3		)		(3.7		)
	Reclassification adjustments to	(88.2		)	(C)	—				—				(88.2		)
	retained earnings
	Balance at December 31, 2014	$	(154.4	)		$	163.7			$	(124.0	)		$	(114.7	)
		Six Months Ended
		December 31, 2013
		Currency Translation Adjustment				Net Gains/Losses 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/(loss)	36.5				(59.8		)		—				(23.3		)
	before reclassification adjustments
	Tax effect	—				20.5				—				20.5
	Reclassification adjustments to	—				(15.0		)	(A)	10.3			(B)	(4.7		)
	net earnings
	Tax effect	—				5.6				(2.8		)		2.8
	Balance at December 31, 2013	$	76.1			$	138			$	(203.4	)		$	10.7
	(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 10).
	(C) Reclassification adjustment out of AOCI is related to the CDK spin-off and included in retained earnings on the Consolidated Balance Sheets.

Financial_Data_By_Segment

Financial Data By Segment	6 Months Ended
	Dec. 31, 2014
Interim Financial Data By Segment [Abstract]
Interim Financial Data By Segment	Note 15. Interim Financial Data by Segment
	Based upon similar economic and operational characteristics, the Company’s strategic business units have been aggregated into the following two reportable segments: Employer Services and PEO 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, the elimination of intercompany 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.
	Segment Results:
		Revenues from
		Continuing Operations
		Three Months Ended						Six Months Ended
		December 31,						December 31,
		2014			2013			2014			2013
	Employer Services	$	2,169.90		$	2,082.10		$	4,269.00		$	4,045.30
	PEO Services	625.8			531.1			1,220.80			1,036.10
	Other	(2.7		)	(0.2		)	(2.9		)	—
	Reconciling item:
	Client fund interest	(131.7		)	(119.3		)	(251.8		)	(225.7		)
		$	2,661.30		$	2,493.70		$	5,235.10		$	4,855.70
		Earnings from Continuing Operations before Income Taxes
		Three Months Ended						Six Months Ended
		December 31,						December 31,
		2014			2013			2014			2013
	Employer Services	$	627.4		$	596		$	1,211.50		$	1,119.30
	PEO Services	78.7			59.5			145.4			111.4
	Other	(73.3		)	(74.2		)	(151.5		)	(139.4		)
	Reconciling item:
	Client fund interest	(131.7		)	(119.3		)	(251.8		)	(225.7		)
		$	501.1		$	462		$	953.6		$	865.6

Divestiture_Tables

Divestiture (Tables)	6 Months Ended
	Dec. 31, 2014
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Discontinued Operations, Income Statement and Balance Sheet	In conjunction with the spin-off of CDK and the sale of OHS, the Company has classified the operating results of these businesses as discontinued operations for all periods presented. The operating results for these businesses were as follows:
		Three Months Ended					Six Months Ended
		December 31,					December 31,
		2014			2013		2014			2013
	Revenues	$	—		$	489.1	$	508.9		$	966.7
	(Losses)/earnings from discontinued operations before income taxes	(2.5		)	99.1		63.1			192.8
	Provision for income taxes	—			36.3		68.4			66.3
	Net (loss)/earnings from discontinued operations	$	(2.5	)	$	62.8	$	(5.3	)	$	126.5
	The following is a summary of the assets and liabilities related to discontinued operations as of June 30, 2014:
		June 30, 2014
	Assets:
	Cash	$	397.7
	Accounts receivable, net	296.7
	Property, plant and equipment, net	109.7
	Goodwill	1,226.60
	Intangible assets, net	133.5
	Other assets	245.5
	Total assets	$	2,409.70
	Liabilities:
	Accounts payable	$	17.2
	Accrued expenses and other current liabilities	128.1
	Accrued payroll and payroll related expenses	99.2
	Deferred revenues	218.2
	Deferred income taxes	70.8
	Other liabilities	47.7
	Total liabilities	$	581.2

Earnings_per_Share_Tables

Earnings per Share (Tables)	6 Months Ended
	Dec. 31, 2014
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 December 31, 2014
	Net earnings from continuing operations	$	334			$	334
	Weighted average shares (in millions)	476.6		2.1	1.6	480.3
	EPS from continuing operations	$	0.7			$	0.7
	Three Months Ended December 31, 2013
	Net earnings from continuing operations	$	314.2			$	314.2
	Weighted average shares (in millions)	478.4		2.9	1.5	482.8
	EPS from continuing operations	$	0.66			$	0.65
	Six Months Ended December 31, 2014
	Net earnings from continuing operations	$	632			$	632
	Weighted average shares (in millions)	477.6		2.1	1.4	481
	EPS from continuing operations	$	1.32			$	1.31
	Six Months Ended December 31, 2013
	Net earnings from continuing operations	$	579.1			$	579.1
	Weighted average shares (in millions)	479.2		3	1.4	483.6
	EPS from continuing operations	$	1.21			$	1.2

Other_Income_Net_Tables

Other Income, Net (Tables)	6 Months Ended
	Dec. 31, 2014
Other Income, Net [Abstract]
Other Income, net
		Three Months Ended						Six Months Ended
		December 31,						December 31,
		2014			2013			2014			2013
	Interest income on corporate funds	$	(18.3	)	$	(16.1	)	$	(36.7	)	$	(34.6	)
	Realized gains on available-for-sale securities	(1.7		)	(13.2		)	(2.7		)	(17.5		)
	Realized losses on available-for-sale securities	0.8			1.6			1			2.5
	Gain on the sale of notes receivable	—			—			(1.4		)	—
	Other, net	—			—			—			(0.1		)
	Other income, net	$	(19.2	)	$	(27.7	)	$	(39.8	)	$	(49.7	)

Corporate_Investments_And_Fund1

Corporate Investments And Funds Held For Clients (Tables)	6 Months Ended
	Dec. 31, 2014
Corporate Investments And Funds Held For Clients [Abstract]
Available-for-sale Securities [Table Text Block]
		December 31, 2014
		Amortized			Gross			Gross			Fair Value (A)
		Cost			Unrealized			Unrealized
					Gains			Losses
	Type of issue:
	Money market securities, cash and other cash equivalents	$	16,377.80		$	—		$	—		$	16,377.80
	Available-for-sale securities:
	Corporate bonds	8,842.00			132.7			(16.5		)	8,958.20
	U.S. Treasury and direct obligations of	5,940.20			73.8			(9.5		)	6,004.50
	U.S. government agencies
	Asset-backed securities	2,190.80			6.3			(8.8		)	2,188.30
	Canadian government obligations and	968.8			9.2			—			978
	Canadian government agency obligations
	Canadian provincial bonds	720.8			25.7			(1.2		)	745.3
	Municipal bonds	549.2			17.2			(0.4		)	566
	Other securities	868.4			19.9			(0.4		)	887.9
	Total available-for-sale securities	20,080.20			284.8			(36.8		)	20,328.20
	Total corporate investments and funds held for clients	$	36,458.00		$	284.8		$	(36.8	)	$	36,706.00
	(A) Included within available-for-sale securities are corporate investments with fair values of $148.2 million and funds held for clients with fair values of $20,180.0 million. All available-for-sale securities were included in Level 2.
		June 30, 2014
		Amortized			Gross			Gross			Fair Value (B)
		Cost			Unrealized			Unrealized
					Gains			Losses
	Type of issue:
	Money market securities, cash and other cash equivalents	$	2,773.70		$	—		$	—		$	2,773.70
	Available-for-sale securities:
	Corporate bonds	8,720.10			171.1			(15.0		)	8,876.20
	U.S. Treasury and direct obligations of	6,051.40			107.3			(11.7		)	6,147.00
	U.S. government agencies
	Asset-backed securities	1,822.60			6.1			(6.9		)	1,821.80
	Canadian government obligations and	1,031.40			7.6			(0.8		)	1,038.20
	Canadian government agency obligations
	Canadian provincial bonds	747.7			25.3			(2.5		)	770.5
	Municipal bonds	543.3			19.4			(0.5		)	562.2
	Other securities	915.6			25.7			(0.7		)	940.6
	Total available-for-sale securities	19,832.10			362.5			(38.1		)	20,156.50
	Total corporate investments and funds held for clients	$	22,605.80		$	362.5		$	(38.1	)	$	22,930.20
	(B) Included within available-for-sale securities are corporate investments with fair values of $2,086.3 million and funds held for clients with fair values of $18,070.2 million. All 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 December 31, 2014, are as follows:
		December 31, 2014
		Securities in unrealized loss position less than 12 months						Securities in unrealized loss position greater than 12 months					Total
		Unrealized			Fair market			Unrealized			Fair market		Gross			Fair
		losses			value			losses			value		unrealized			market value
													losses
	Corporate bonds	$	(4.8	)	$	1,165.00		$	(11.7	)	$	836.1	$	(16.5	)	$	2,001.10
	U.S. Treasury and direct obligations of	(1.3		)	492.5			(8.2		)	646.5		(9.5		)	1,139.00
	U.S. government agencies
	Asset-backed securities	(2.1		)	733.8			(6.7		)	526.9		(8.8		)	1,260.70
	Canadian government obligations and	—			43.3			—			—		—			43.3
	Canadian government agency obligations
	Canadian provincial bonds	(0.4		)	94.6			(0.8		)	71.5		(1.2		)	166.1
	Municipal bonds	(0.3		)	88.7			(0.1		)	9		(0.4		)	97.7
	Other securities	—			5.6			(0.4		)	30.8		(0.4		)	36.4
		$	(8.9	)	$	2,623.50		$	(27.9	)	$	2,120.80	$	(36.8	)	$	4,744.30
	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, 2014, are as follows:
		June 30, 2014
		Securities in unrealized loss position less than 12 months						Securities in unrealized loss position greater than 12 months					Total
		Unrealized			Fair market			Unrealized			Fair market		Gross			Fair
		losses			value			losses			value		unrealized			market value
													losses
	Corporate bonds	$	(0.9	)	$	313.8		$	(14.1	)	$	1,026.00	$	(15.0	)	$	1,339.80
	U.S. Treasury and direct obligations of U.S. government agencies	(0.3		)	84.6			(11.4		)	944.8		(11.7		)	1,029.40
	Asset-backed securities	(0.7		)	325.4			(6.2		)	555.5		(6.9		)	880.9
	Canadian government obligations and	(0.8		)	127.2			—			—		(0.8		)	127.2
	Canadian government agency obligations
	Canadian provincial bonds	(0.9		)	75.2			(1.6		)	118.6		(2.5		)	193.8
	Municipal bonds	(0.1		)	42			(0.4		)	22.6		(0.5		)	64.6
	Other securities	—			13.9			(0.7		)	45.7		(0.7		)	59.6
		$	(3.7	)	$	982.1		$	(34.4	)	$	2,713.20	$	(38.1	)	$	3,695.30
Classification Of Corporate Investments On The Consolidated Balance Sheets
			December 31,			June 30,
			2014			2014
	Corporate investments:
	Cash and cash equivalents		$	1,850.80		$	1,585.90
	Short-term marketable securities		101.9			2,032.20
	Long-term marketable securities		46.3			54.1
	Total corporate investments		$	1,999.00		$	3,672.20
Schedule Of Investment Of Funds Held For Clients
			December 31,			June 30,
			2014			2014
	Funds held for clients:
	Restricted cash and cash equivalents held to satisfy client funds obligations		$	14,527.00		$	1,187.80
	Restricted short-term marketable securities held to satisfy client funds obligations		4,595.70			1,312.50
	Restricted long-term marketable securities held to satisfy client funds obligations		15,584.30			16,757.70
	Total funds held for clients		$	34,707.00		$	19,258.00
Expected Maturities Of Available-For-Sale Securities
	One year or less	$	4,697.50
	One year to two years	3,754.40
	Two years to three years	3,092.00
	Three years to four years	2,098.30
	After four years	6,686.00
	Total available-for-sale securities	$	20,328.20

Receivables_Tables

Receivables (Tables)	6 Months Ended
	Dec. 31, 2014
Accounts, Notes, Loans and Financing Receivable, Classified [Abstract]
Schedule Of The Company's Receivables
		December 31, 2014						June 30, 2014
		Current			Long-term			Current			Long-term
	Trade receivables	$	1,613.70		$	—		$	1,457.70		$	—
	Notes receivable	18.5			33.5			94.8			169.9
	Less:
	Allowance for doubtful accounts - trade receivables	(35.5		)	—			(38.1		)	—
	Allowance for doubtful accounts - notes receivable	(0.4		)	(0.6		)	(4.7		)	(8.3		)
	Unearned income - notes receivable	(0.7		)	(0.9		)	(6.0		)	(6.2		)
		$	1,595.60		$	32		$	1,503.70		$	155.4
Rollforward Of The Allowance For Doubtful Accounts For Notes Receivable
		Current			Long-term
	Balance at June 30, 2014	$	4.7		$	8.3
	Net provision	0.3			0.6
	Chargeoffs	(0.2		)	(0.3		)
	Recoveries and other (A)	(4.4		)	(8.0		)
	Balance at December 31, 2014	$	0.4		$	0.6

Goodwill_And_Intangible_Assets1

Goodwill And Intangible Assets, Net (Tables)	6 Months Ended
	Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Changes In Goodwill
		Employer				PEO				Total
		Services				Services
	Balance at June 30, 2014 (A)	$	1,882.40			$	4.8			$	1,887.20
	Additions and other adjustments, net	6.8				—				6.8
	Currency translation adjustments	(60.6		)		—				(60.6		)
	Balance at December 31, 2014 (A)	$	1,828.60			$	4.8			$	1,833.40
Components Of Finite-Lived Intangible Assets
			December 31,				June 30,
			2014				2014
	Intangible assets:
	Software and software licenses		$	1,582.30			$	1,523.20
	Customer contracts and lists		638.3				648.7
	Other intangibles		209				208.3
			2,429.60				2,380.20
	Less accumulated amortization:
	Software and software licenses		(1,267.6		)		(1,231.2		)
	Customer contracts and lists		(473.8		)		(467.1		)
	Other intangibles		(188.9		)		(183.1		)
			(1,930.3		)		(1,881.4		)
	Intangible assets, net		$	499.3			$	498.8
Schedule Of Finite-Lived Intangible Assets, Future Amortization Expense
		Amount
	Six months ending June 30, 2015	$	71.4
	Twelve months ending June 30, 2016	$	129.3
	Twelve months ending June 30, 2017	$	100.4
	Twelve months ending June 30, 2018	$	52.8
	Twelve months ending June 30, 2019	$	39.1
	Twelve months ending June 30, 2020	$	30.5

Employee_Benefit_Plans_Tables

Employee Benefit Plans (Tables)	6 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Components Of Stock-Based Compensation Expense	The following table represents stock-based compensation expense and related income tax benefits for the three and six months ended December 31, 2014 and 2013, respectively:
		Three Months Ended						Six Months Ended
		December 31,						December 31,
		2014			2013			2014			2013
	Operating expenses	$	7.5		$	6.3		$	15.1		$	10.2
	Selling, general and administrative expenses	23.3			22.1			48.9			38.8
	System development and programming costs	5.5			4.9			11.1			7.6
	Total pretax stock-based compensation expense	$	36.3		$	33.3		$	75.1		$	56.6
	Income tax benefit	$	12.8		$	11.9		$	26.7		$	20.3
Changes In Stock Options Outstanding
			Number		Weighted
			of Options		Average Price
			(in thousands)		(in dollars)
	Options outstanding at July 1, 2014		7,931		$	52
	Options granted		13		$	83
	Options exercised		(1,258	)	$	40
	Options canceled		(119	)	$	57
	Options increased for spin-off adjustment ratio		849		$	47
	CDK employee options replaced at spin-off with CDK awards		(823	)	$	54
	Options outstanding at December 31, 2014		6,593		$	47
Time Based Restricted Shares and Units
			Number of Shares		Number of Units
			(in thousands)		(in thousands)
	Restricted shares/units outstanding at July 1, 2014		2,341		571
	Restricted shares/units granted		903		215
	Restricted shares/units vested		(1,068	)	(250	)
	Restricted shares/units forfeited		(87	)	(32	)
	Share/unit increase for spin-off adjustment ratio		267		64
	CDK employee restricted shares/units replaced at spin-off with CDK awards		(189	)	(43	)
	Restricted shares/units outstanding at December 31, 2014		2,167		525
Performance Based Restricted shares and units
			Number of Shares		Number of Units
			(in thousands)		(in thousands)
	Restricted shares/units outstanding at July 1, 2014		803		318
	Restricted shares/units granted		339		217
	Restricted shares/units vested		(223	)	(13	)
	Restricted shares/units forfeited		(44	)	(10	)
	Share/unit increase for spin-off adjustment ratio		118		67
	CDK employee restricted shares/units replaced at spin-off with CDK awards		(45	)	(35	)
	Restricted shares/units outstanding at December 31, 2014		948		544
Assumptions Used To Estimate Fair Value For Stock Options Granted
		Six Months Ended
		December 31,
		2014			2013
	Risk-free interest rate	1.9		%	1.5		%
	Dividend yield	2.3		%	2.4		%
	Weighted average volatility factor	22.8		%	23.6		%
	Weighted average expected life (in years)	5.4			5.4
	Weighted average fair value (in dollars) (A)	$	12.45		$	10.94
	(A) The weighted average fair values were adjusted to reflect the impact of the spin-off of CDK.
Components Of Net Pension Expense	The components of net pension expense were as follows:
		Three Months Ended						Six Months Ended
		December 31,						December 31,
		2014			2013			2014			2013
	Service cost – benefits earned during the period	$	16.5		$	16.6		$	35.7		$	33.2
	Interest cost on projected benefits	15.7			15.7			31.5			31.3
	Expected return on plan assets	(32.5		)	(29.9		)	(65.0		)	(59.7		)
	Net amortization and deferral	4.3			5			8.7			10
	Curtailments and special termination benefits	—			—			3.2			—
	Net pension expense	$	4		$	7.4		$	14.1		$	14.8

Commitments_And_Contingencies_

Commitments And Contingencies Contractual Commitments Contingencies and Off-Balance Sheet Arrangements (Tables)	6 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Schedule Of Decrease in Operating Leases Future Minimum Payments Due To Disposal[Table Text Block]
	Years ending June 30,
	2015	$	32
	2016	22.1
	2017	12.7
	2018	5.2
	2019	3.8
	Thereafter	5.6
		$	81.4

Reclassification_out_of_Accumu1

Reclassification out of Accumulated Other Comprehensive Income (Tables)	6 Months Ended
	Dec. 31, 2014
Reclassification out of Accumulated Other Comprehensive Income [Abstract]
Reclassification out of Accumulated Other Comprehensive Income	Changes in AOCI by component are as follows:
		Three Months Ended
		December 31, 2014
		Currency Translation Adjustment				Net Gains/Losses on Available-for-sale Securities				Pension Liability				Accumulated Other Comprehensive Income
	Balance at September 30, 2014	$	(97.6	)		$	151			$	(127.5	)		$	(74.1	)
	Other comprehensive (loss)/income	(56.8		)		19.4				—				(37.4		)
	before reclassification adjustments
	Tax effect	—				(6.1		)		—				(6.1		)
	Reclassification adjustments to	—				(0.9		)	(A)	5			(B)	4.1
	net earnings
	Tax effect	—				0.3				(1.5		)		(1.2		)
	Balance at December 31, 2014	$	(154.4	)		$	163.7			$	(124.0	)		$	(114.7	)
		Three Months Ended
		December 31, 2013
		Currency Translation Adjustment				Net Gains/Losses on Available-for-sale Securities				Pension Liability				Accumulated Other Comprehensive Income
	Balance at September 30, 2013	$	82.9			$	194.3			$	(206.7	)		$	70.5
	Other comprehensive loss	(6.8		)		(74.5		)		—				(81.3		)
	before reclassification adjustments
	Tax effect	—				25.5				—				25.5
	Reclassification adjustments to	—				(11.6		)	(A)	5.2			(B)	(6.4		)
	net earnings
	Tax effect	—				4.3				(1.9		)		2.4
	Balance at December 31, 2013	$	76.1			$	138			$	(203.4	)		$	10.7
		Six Months Ended
		December 31, 2014
		Currency Translation Adjustment				Net Gains/Losses on Available-for-sale Securities				Pension Liability				Accumulated Other Comprehensive Income
	Balance at June 30, 2014	$	99.5			$	211.6			$	(132.9	)		$	178.2
	Other comprehensive loss	(165.7		)		(74.7		)		—				(240.4		)
	before reclassification adjustments
	Tax effect	—				27.9				—				27.9
	Reclassification adjustments to	—				(1.7		)	(A)	13.2			(B)	11.5
	net earnings
	Tax effect	—				0.6				(4.3		)		(3.7		)
	Reclassification adjustments to	(88.2		)	(C)	—				—				(88.2		)
	retained earnings
	Balance at December 31, 2014	$	(154.4	)		$	163.7			$	(124.0	)		$	(114.7	)
		Six Months Ended
		December 31, 2013
		Currency Translation Adjustment				Net Gains/Losses 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/(loss)	36.5				(59.8		)		—				(23.3		)
	before reclassification adjustments
	Tax effect	—				20.5				—				20.5
	Reclassification adjustments to	—				(15.0		)	(A)	10.3			(B)	(4.7		)
	net earnings
	Tax effect	—				5.6				(2.8		)		2.8
	Balance at December 31, 2013	$	76.1			$	138			$	(203.4	)		$	10.7
	(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 10).
	(C) Reclassification adjustment out of AOCI is related to the CDK spin-off and included in retained earnings on the Consolidated Balance Sheets.

Financial_Data_By_Segment_Inte

Financial Data By Segment Interim Financial Data By Segment (Tables)	6 Months Ended
	Dec. 31, 2014
Interim Financial Data By Segment [Abstract]
Schedule of Segment Reporting Information, by Segment [Table Text Block]
		Revenues from
		Continuing Operations
		Three Months Ended						Six Months Ended
		December 31,						December 31,
		2014			2013			2014			2013
	Employer Services	$	2,169.90		$	2,082.10		$	4,269.00		$	4,045.30
	PEO Services	625.8			531.1			1,220.80			1,036.10
	Other	(2.7		)	(0.2		)	(2.9		)	—
	Reconciling item:
	Client fund interest	(131.7		)	(119.3		)	(251.8		)	(225.7		)
		$	2,661.30		$	2,493.70		$	5,235.10		$	4,855.70
		Earnings from Continuing Operations before Income Taxes
		Three Months Ended						Six Months Ended
		December 31,						December 31,
		2014			2013			2014			2013
	Employer Services	$	627.4		$	596		$	1,211.50		$	1,119.30
	PEO Services	78.7			59.5			145.4			111.4
	Other	(73.3		)	(74.2		)	(151.5		)	(139.4		)
	Reconciling item:
	Client fund interest	(131.7		)	(119.3		)	(251.8		)	(225.7		)
		$	501.1		$	462		$	953.6		$	865.6

Divestiture_Narrative_Details

Divestiture - Narrative (Details) (USD $)	6 Months Ended		3 Months Ended
Share data in Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Jun. 30, 2014	Sep. 24, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Common stock, par value	$0.10		$0.10	$0.10
Dividend received from Disposal Entity	$825,000,000	$0
CDK Global Inc [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Date of Spinoff	9/30/14
Date of record for ADP stockholders to receive Disposal Entity's shares	24-Sep-14
ADP share to be converted to Disposal Entity's Shares					$1
Common stock, par value	$0.01		$0.01
Disposal Entity's shares converted from Parent shares					$3
Shares Distributed of Disposal Entity's common stock	160.6		160.6
Reduction in retained earnings due to net assets	1,500,000,000
Dividend received from Disposal Entity	825,000,000
Separation Costs, Incurred Cost	-45,300,000		-2,500,000
Occupational Health and Safety (OHS) [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Date	28-Feb-14
Gain (Loss) from Disposal from Disposal Entity	$15,600,000

Divestiture_Net_lossearnings_D

Divestiture - Net (loss)/earnings (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Discontinued Operations and Disposal Groups [Abstract]
Revenues	$0	$489.10	$508.90	$966.70
(Losses)/earnings from discontinued operations before income taxes	-2.5	99.1	63.1	192.8
Provision for income taxes	0	36.3	68.4	66.3
Net (loss)/earnings from discontinued operations	($2.50)	$62.80	($5.30)	$126.50

Divestiture_Assets_and_Liabili

Divestiture - Assets and Liabilities (Details) (USD $)	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Assets:
Cash	$0	$397.70	$315.60
Accounts receivable, net		296.7
Property, plant and equipment, net		109.7
Goodwill		1,226.60
Intangible assets, net		133.5
Other assets		245.5
Total assets	0	2,409.70
Liabilities:
Accounts payable		17.2
Accrued expenses and other current liabilities		128.1
Accrued payroll and payroll related expenses		99.2
Deferred revenues		218.2
Deferred income taxes		70.8
Other liabilities		47.7
Total liabilities	$0	$581.20

Earnings_per_Share_Details

Earnings per Share (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Earnings Per Share [Abstract]
Net earnings from continuing operations	$334	$314.20	$632	$579.10
Basic weighted average shares outstanding	476.6	478.4	477.6	479.2
Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants	2.1	2.9	2.1	3
Effect of Employee Restricted stock Shares On Weighted Average Number of Diluted Shares Outstanding	1.6	1.5	1.4	1.4
Weighted Average Number of Shares Outstanding, Diluted	480.3	482.8	481	483.6
Income (Loss) from Continuing Operations, Per Basic Share	$0.70	$0.66	$1.32	$1.21
Income (Loss) from Continuing Operations, Per Diluted Share	$0.70	$0.65	$1.31	$1.20
Options excluded from the calculation of diluted earnings per share		0.1		0.1

Other_Income_Net_Other_Income_

Other Income, Net (Other Income, Net) (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Other Income, Net [Abstract]
Interest income on corporate funds	($18.30)	($16.10)	($36.70)	($34.60)
Realized gains on available-for-sale securities	-1.7	-13.2	-2.7	-17.5
Realized losses on available-for-sale securities	0.8	1.6	1	2.5
Gain on the sale of notes receivable	0	0	-1.4	0
Other, net	0	0	0	0.1
Other income, net	($19.20)	($27.70)	($39.80)	($49.70)

Corporate_Investments_And_Fund2

Corporate Investments And Funds Held For Clients (Narrative) (Details) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Jun. 30, 2014
Schedule of Available-for-sale Securities [Line Items]
Fair market value of securities in unrealized loss position less than 12 months	$2,623.50		$982.10
Available-for-sale securities - Fair Value	20,328.20	[1]	20,156.50	[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	34,461.10		18,963.40
Client funds investments with original maturities	90 days or less
Percentage of the available-for-sale securities were rated AAA or AA	82.00%
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	27.9		34.4
Fair market value of securities in unrealized loss positions greater than 12 months	2,120.80		2,713.20
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	36.8		38.1
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	4,744.30		3,695.30
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	8.9		3.7
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair market value of securities in unrealized loss position less than 12 months	1,165		313.8
Available-for-sale securities - Fair Value	8,958.20	[1]	8,876.20	[2]
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	11.7		14.1
Fair market value of securities in unrealized loss positions greater than 12 months	836.1		1,026
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	16.5		15
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	2,001.10		1,339.80
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	4.8		0.9
US Treasury and Government [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair market value of securities in unrealized loss position less than 12 months	492.5		84.6
Available-for-sale securities - Fair Value	6,004.50	[1]	6,147	[2]
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	8.2		11.4
Fair market value of securities in unrealized loss positions greater than 12 months	646.5		944.8
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	9.5		11.7
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,139		1,029.40
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1.3		0.3
Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair market value of securities in unrealized loss position less than 12 months	733.8		325.4
Available-for-sale securities - Fair Value	2,188.30	[1]	1,821.80	[2]
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	6.7		6.2
Fair market value of securities in unrealized loss positions greater than 12 months	526.9		555.5
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	8.8		6.9
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,260.70		880.9
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	2.1		0.7
Canadian Government Obligations And Canadian Government Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair market value of securities in unrealized loss position less than 12 months	43.3		127.2
Available-for-sale securities - Fair Value	978	[1]	1,038.20	[2]
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0		0
Fair market value of securities in unrealized loss positions greater than 12 months	0		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	0		0.8
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	43.3		127.2
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0		0.8
Canadian Provincial Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair market value of securities in unrealized loss position less than 12 months	94.6		75.2
Available-for-sale securities - Fair Value	745.3	[1]	770.5	[2]
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0.8		1.6
Fair market value of securities in unrealized loss positions greater than 12 months	71.5		118.6
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	1.2		2.5
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	166.1		193.8
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0.4		0.9
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair market value of securities in unrealized loss position less than 12 months	88.7		42
Available-for-sale securities - Fair Value	566	[1]	562.2	[2]
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0.1		0.4
Fair market value of securities in unrealized loss positions greater than 12 months	9		22.6
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	0.4		0.5
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	97.7		64.6
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0.3		0.1
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Fair market value of securities in unrealized loss position less than 12 months	5.6		13.9
Available-for-sale securities - Fair Value	887.9	[1]	940.6	[2]
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0.4		0.7
Fair market value of securities in unrealized loss positions greater than 12 months	30.8		45.7
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	0.4		0.7
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	36.4		59.6
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0		0
Federal Home Loan Banks [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities - Fair Value	4,530.10
Federal Farm Credit Banks [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities - Fair Value	1,022
Fixed Rate Credit Card [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities - Fair Value	1,548.20
Asset-Backed Auto Loan Receivables [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities - Fair Value	364.4
Rate Reduction [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities - Fair Value	205.3
Supranational Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities - Fair Value	383
Sovereign Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities - Fair Value	319.9
Residential Mortgage-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities - Fair Value	100.8
Corporate Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities - Fair Value	148.2		2,086.30
Funds Held For Clients [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities - Fair Value	$20,180		$18,070.20
[1]	Included within available-for-sale securities are corporate investments with fair values of $148.2 million and funds held for clients with fair values of $20,180.0 million. All available-for-sale securities were included in Level 2.
[2]	Included within available-for-sale securities are corporate investments with fair values of $2,086.3 million and funds held for clients with fair values of $18,070.2 million. All 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 $)	Dec. 31, 2014		Jun. 30, 2014
In Millions, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]
Money market securities and other cash equivalents - Amortized Cost	$16,377.80		$2,773.70
Money market securities and other cash equivalents - Fair Value	16,377.80		2,773.70
Available-for-sale securities - Amortized Cost	20,080.20		19,832.10
Available-for-sale securities - Gross Unrealized Gains	284.8		362.5
Available-for-sale securities - Gross Unrealized Losses	-36.8		-38.1
Available-for-sale securities - Fair Value	20,328.20	[1]	20,156.50	[2]
Total corporate investments and funds held for clients - Amortized Cost	36,458		22,605.80
Total corporate investments and funds held for clients - Gross Unrealized Gains	284.8		362.5
Total corporate investments and funds held for clients - Gross Unrealized Losses	-36.8		-38.1
Total corporate investments and funds held for clients - Fair Value	36,706		22,930.20
Corporate Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities - Fair Value	148.2		2,086.30
Funds Held For Clients [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities - Fair Value	20,180		18,070.20
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities - Amortized Cost	8,842		8,720.10
Available-for-sale securities - Gross Unrealized Gains	132.7		171.1
Available-for-sale securities - Gross Unrealized Losses	-16.5		-15
Available-for-sale securities - Fair Value	8,958.20	[1]	8,876.20	[2]
US Treasury and Government [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities - Amortized Cost	5,940.20		6,051.40
Available-for-sale securities - Gross Unrealized Gains	73.8		107.3
Available-for-sale securities - Gross Unrealized Losses	-9.5		-11.7
Available-for-sale securities - Fair Value	6,004.50	[1]	6,147	[2]
Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities - Amortized Cost	2,190.80		1,822.60
Available-for-sale securities - Gross Unrealized Gains	6.3		6.1
Available-for-sale securities - Gross Unrealized Losses	-8.8		-6.9
Available-for-sale securities - Fair Value	2,188.30	[1]	1,821.80	[2]
Canadian Government Obligations And Canadian Government Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities - Amortized Cost	968.8		1,031.40
Available-for-sale securities - Gross Unrealized Gains	9.2		7.6
Available-for-sale securities - Gross Unrealized Losses	0		-0.8
Available-for-sale securities - Fair Value	978	[1]	1,038.20	[2]
Canadian Provincial Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities - Amortized Cost	720.8		747.7
Available-for-sale securities - Gross Unrealized Gains	25.7		25.3
Available-for-sale securities - Gross Unrealized Losses	-1.2		-2.5
Available-for-sale securities - Fair Value	745.3	[1]	770.5	[2]
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities - Amortized Cost	549.2		543.3
Available-for-sale securities - Gross Unrealized Gains	17.2		19.4
Available-for-sale securities - Gross Unrealized Losses	-0.4		-0.5
Available-for-sale securities - Fair Value	566	[1]	562.2	[2]
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities - Amortized Cost	868.4		915.6
Available-for-sale securities - Gross Unrealized Gains	19.9		25.7
Available-for-sale securities - Gross Unrealized Losses	-0.4		-0.7
Available-for-sale securities - Fair Value	$887.90	[1]	$940.60	[2]
[1]	Included within available-for-sale securities are corporate investments with fair values of $148.2 million and funds held for clients with fair values of $20,180.0 million. All available-for-sale securities were included in Level 2.
[2]	Included within available-for-sale securities are corporate investments with fair values of $2,086.3 million and funds held for clients with fair values of $18,070.2 million. All 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 $)	Dec. 31, 2014	Jun. 30, 2014
In Millions, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses less than 12 months	($27.90)	($34.40)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	4,744.30	3,695.30
Fair market value of securities in unrealized loss position less than 12 months	2,623.50	982.1
Fair market value of securities in unrealized loss positions greater than 12 months	2,120.80	2,713.20
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	36.8	38.1
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-8.9	-3.7
Corporate Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses less than 12 months	-11.7	-14.1
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	2,001.10	1,339.80
Fair market value of securities in unrealized loss position less than 12 months	1,165	313.8
Fair market value of securities in unrealized loss positions greater than 12 months	836.1	1,026
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	16.5	15
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-4.8	-0.9
US Treasury and Government [Member]
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses less than 12 months	-8.2	-11.4
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,139	1,029.40
Fair market value of securities in unrealized loss position less than 12 months	492.5	84.6
Fair market value of securities in unrealized loss positions greater than 12 months	646.5	944.8
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	9.5	11.7
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-1.3	-0.3
Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses less than 12 months	-6.7	-6.2
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,260.70	880.9
Fair market value of securities in unrealized loss position less than 12 months	733.8	325.4
Fair market value of securities in unrealized loss positions greater than 12 months	526.9	555.5
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	8.8	6.9
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-2.1	-0.7
Canadian Government Obligations And Canadian Government Agency Obligations [Member]
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses less than 12 months	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	43.3	127.2
Fair market value of securities in unrealized loss position less than 12 months	43.3	127.2
Fair market value of securities in unrealized loss positions greater than 12 months	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	0	0.8
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	-0.8
Canadian Provincial Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses less than 12 months	-0.8	-1.6
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	166.1	193.8
Fair market value of securities in unrealized loss position less than 12 months	94.6	75.2
Fair market value of securities in unrealized loss positions greater than 12 months	71.5	118.6
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	1.2	2.5
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-0.4	-0.9
Municipal Bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses less than 12 months	-0.1	-0.4
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	97.7	64.6
Fair market value of securities in unrealized loss position less than 12 months	88.7	42
Fair market value of securities in unrealized loss positions greater than 12 months	9	22.6
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	0.4	0.5
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	-0.3	-0.1
Other Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Unrealized losses less than 12 months	-0.4	-0.7
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	36.4	59.6
Fair market value of securities in unrealized loss position less than 12 months	5.6	13.9
Fair market value of securities in unrealized loss positions greater than 12 months	30.8	45.7
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	0.4	0.7
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$0	$0

Corporate_Investments_And_Fund5

Corporate Investments And Funds Held For Clients (Classification Of Corporate Investments On The Consolidated Balance Sheets) (Details) (USD $)	Dec. 31, 2014		Jun. 30, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Corporate Investments And Funds Held For Clients [Abstract]
Cash and cash equivalents	$1,850.80	[1]	$1,585.90	[1]	$951.50
Short-term marketable securities	101.9	[1]	2,032.20	[1]
Long-term marketable securities	46.3		54.1
Total corporate investments	$1,999		$3,672.20
[1]	As of June 30, 2014, $2,015.8 million of short-term marketable securities and $183.8 million of cash and cash equivalents are related to the Company's outstanding commercial paper borrowings (see Note 9).

Corporate_Investments_And_Fund6

Corporate Investments And Funds Held For Clients (Schedule Of Investment Of Funds Held For Clients) (Details) (USD $)	Dec. 31, 2014	Jun. 30, 2014
In Millions, unless otherwise specified
Corporate Investments And Funds Held For Clients [Abstract]
Restricted cash and cash equivalents held to satisfy client funds obligations	$14,527	$1,187.80
Restricted short-term marketable securities held to satisfy client funds obligations	4,595.70	1,312.50
Restricted long-term marketable securities held to satisfy client funds obligations	15,584.30	16,757.70
Total funds held for clients	$34,707	$19,258

Corporate_Investments_And_Fund7

Corporate Investments And Funds Held For Clients (Expected Maturities Of Available-For-Sale Securities) (Details) (USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
Corporate Investments And Funds Held For Clients [Abstract]
One year or less	$4,697.50
One year to two years	3,754.40
Two years to three years	3,092
Three years to four years	2,098.30
After four years	6,686
Total available-for-sale securities	$20,328.20

Receivables_Narrative_Details

Receivables (Narrative) (Details) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Jun. 30, 2014
Accounts, Notes, Loans and Financing Receivable, Classified [Abstract]
Recoveries and other (A)	$10.70
Proceeds from the sale of notes receivable	$225.50	$0
Percentage Of Notes Receivable Classified As Current	100.00%		100.00%
Allowance for Doubtful Accounts, Percent of Notes Receivable	2.00%		5.00%

Receivables_Schedule_Of_The_Co

Receivables (Schedule Of The Company's Receivables) (Details) (USD $)	Dec. 31, 2014	Jun. 30, 2014
In Millions, unless otherwise specified
Accounts, Notes, Loans and Financing Receivable, Classified [Abstract]
Trade receivables - Current	$1,613.70	$1,457.70
Trade receivables - Long-term	0	0
Notes receivable - Current	18.5	94.8
Notes receivable - Long-term	33.5	169.9
Allowance for doubtful accounts - trade receivables - Current	-35.5	-38.1
Allowance for doubtful accounts - trade receivables - Long-term	0	0
Allowance for doubtful accounts - notes receivable - Current	-0.4	-4.7
Allowance for doubtful accounts - notes receivable - Long-term	-0.6	-8.3
Unearned income - notes receivable - Current	-0.7	-6
Deferred revenues noncurrent	0.9	6.2
Total - Current	1,595.60	1,503.70
Total - Long-term	$32	$155.40

Receivables_Rollforward_Of_The

Receivables (Rollforward Of The Allowance For Doubtful Accounts For Notes Receivable) (Details) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Jun. 30, 2014
Financing Receivable, Recorded Investment [Line Items]
Allowance for Doubtful Accounts, Percent of Notes Receivable	2.00%		5.00%
Beginning balance, current	$4.70
Beginning balance, long-term	8.3
Recoveries and Other	-4.4	[1]
Recoveries and Other - Non-Current	-8	[1]
Ending balance, current	0.4
Ending balance, long-term	0.6
Percentage Of Notes Receivable Classified As Current	100.00%		100.00%
Allowance for Doubtful Accounts, Noncurrent [Member]
Financing Receivable, Recorded Investment [Line Items]
Beginning balance, long-term	8.3
Net provision	0.6
Chargeoffs	-0.3
Ending balance, long-term	0.6
Allowance for Doubtful Accounts, Current [Member]
Financing Receivable, Recorded Investment [Line Items]
Beginning balance, current	4.7
Net provision	0.3
Chargeoffs	-0.2
Ending balance, current	$0.40
[1]	As a result of the sale of the notes receivable related to Dealer Services financing arrangements, the Company released $10.7 million of non-specific reserves that were accrued on the sold notes receivable, which was recorded in selling, general, and administrative expenses on the Statements of Consolidated Earnings.

Goodwill_And_Intangible_Assets2

Goodwill And Intangible Assets, Net (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Jun. 30, 2014
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			6 years
Goodwill, Impairment Loss	$42.70		$42.70		$42.70
Amortization expense on intangible assets	$38.20	$34.40	$75.80	$70.10
Software And Software Licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			4 years
Customer Contracts And Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			10 years
Other Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			3 years

Goodwill_And_Intangible_Assets3

Goodwill And Intangible Assets, Net (Changes In Goodwill) (Details) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Goodwill [Roll Forward]
Beginning balance	$1,887.20
Additions and other adjustments, net	6.8
Currency translation adjustments	-60.6
Ending balance	1,833.40
Employer Services [Member]
Goodwill [Roll Forward]
Beginning balance	1,882.40	[1]
Additions and other adjustments, net	6.8
Currency translation adjustments	-60.6
Ending balance	1,828.60	[1]
PEO Services [Member]
Goodwill [Roll Forward]
Beginning balance	4.8
Additions and other adjustments, net	0
Currency translation adjustments	0
Ending balance	$4.80
[1]	The goodwill balance at June 30, 2014 and December 31, 2014 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 $)	Dec. 31, 2014	Jun. 30, 2014
In Millions, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]
Total - gross	$2,429.60	$2,380.20
Total - accumulated amortization	-1,930.30	-1,881.40
Intangible assets, net	499.3	498.8
Software And Software Licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Total - gross	1,582.30	1,523.20
Total - accumulated amortization	-1,267.60	-1,231.20
Customer Contracts And Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Total - gross	638.3	648.7
Total - accumulated amortization	-473.8	-467.1
Other Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Total - gross	209	208.3
Total - accumulated amortization	($188.90)	($183.10)

Goodwill_And_Intangible_Assets5

Goodwill And Intangible Assets, Net (Schedule Of Finite-Lived Intangible Assets, Future Amortization Expense) (Details) (USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]
Six months ending June 30, 2015	$71.40
Twelve months ending June 30, 2016	129.3
Twelve months ending June 30, 2017	100.4
Twelve months ending June 30, 2018	52.8
Twelve months ending June 30, 2019	39.1
Twelve months ending June 30, 2020	$30.50

ShortTerm_Financing_Details

Short-Term Financing (Details) (USD $)	3 Months Ended			6 Months Ended			3 Months Ended
	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2014
Short-term Debt [Line Items]
Effective Income Tax Rate Reconciliation, Percent	33.30%		32.00%	33.70%		33.10%
Credit agreement period				364 days
Aggregate amount of commercial paper issuable under the short-term commercial paper program				$7,500,000,000
Maturities of commercial paper range				overnight to up to 364 days
Obligation under commercial paper borrowing	0	[1]		0	[1]			2,173,000,000	[1]
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	2,250,000,000			2,250,000,000
Expiration date of credit facilities				1-Jun-15
Credit Facility Expiring In June 2015 [Member]
Short-term Debt [Line Items]
Maximum borrowing capacity under credit facilities	3,250,000,000			3,250,000,000
Term of credit				5 years
Expiration date of credit facilities				1-Jun-19
Line of credit facility potentially available increase in maximum borrowing capacity				500,000,000
Credit Facility [Domain]
Short-term Debt [Line Items]
Short-term Debt	0			0
Credit Facility Expiring In June 2018 [Member]
Short-term Debt [Line Items]
Maximum borrowing capacity under credit facilities	2,000,000,000			2,000,000,000
Term of credit				5 years
Expiration date of credit facilities				1-Jun-18
Short-Term Commercial Paper Program [Member]
Short-term Debt [Line Items]
Short-term Debt, Average Outstanding Amount	3,000,000,000		3,300,000,000	3,100,000,000		3,200,000,000
Weighted average interest rates			0.10%	0.10%		0.10%	0.10%
Commercial Paper Weight Average Maturity	2 days					2 days
Reverse Repurchase Agreements [Member]
Short-term Debt [Line Items]
Maximum borrowing capacity under credit facilities	3,250,000,000			3,250,000,000
Short-term Debt								0
Short-term Debt, Average Outstanding Amount	$598,600,000		402,000,000	$584,700,000		465,700,000
Weighted average interest rates	0.50%		0.60%	0.50%		0.50%
[1]	As of June 30, 2014, $2,015.8 million of short-term marketable securities and $183.8 million of cash and cash equivalents are related to the Company's outstanding commercial paper borrowings (see Note 9).

Employee_Benefit_Plans_Narrati

Employee Benefit Plans (Narrative) (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
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	5.2	1.4	5.7	5.6
Discontinued Operations Stock Based Compensation Expense		$5.90	$5.10	$9.80
Discontinued Operations Net Pension Expense		1.2	4.3	2.4
Defined Benefit Plan, Curtailments	0	0	3.2	0
Stock Options Granted Prior To July Two Thousand Eight [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Payment Award Vesting Period			5 years
Stock Options Granted After July 2008 [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Payment Award Vesting Period			4 years
Time Based Restricted Stock granted prior to Fiscal 2013 [Domain]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Payment Award Vesting Period			5 years
Time Based Restricted Stock granted during Fiscal 2013 [Domain] [Domain]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Share-based Payment Award Vesting Period			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	8.3		8.3
Weighted-average remaining requisite vesting period			1 year 8 months 7 days
Nonvested Restricted Stock Unit [Domain]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total remaining unrecognized compensation cost	23.9		23.9
Weighted-average remaining requisite vesting period			1 year 4 months 24 days
Non-Vested Restricted Stock [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total remaining unrecognized compensation cost	$131		$131
Weighted-average remaining requisite vesting period			1 year 7 months 6 days
Minimum [Member] | Performance Based Restricted Stock and Units [Domain]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
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]
Share Based Payment Award Performance Period			3 years
Share-based Payment Award Requisite Service Period			26 months

Employee_Benefit_Plans_Compone

Employee Benefit Plans (Components Of Stock-Based Compensation Expense) (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	$36.30	$33.30	$75.10	$56.60
Employee Service Share-based Compensation, Tax Benefit Realized from Exercise of Stock Options	12.8	11.9	26.7	20.3
Operating Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	7.5	6.3	15.1	10.2
Selling, General and Administrative Expenses [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	23.3	22.1	48.9	38.8
System Development And Programming Costs [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock-based compensation expense	$5.50	$4.90	$11.10	$7.60

Employee_Benefit_Plans_Changes

Employee Benefit Plans (Changes In Stock Options Outstanding) (Details) (USD $)	6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2014
Number of Options (in thousands)
Options outstanding at July 1, 2014	7,931
Options granted	13
Options exercised	-1,258
Options canceled	-119
Options outstanding at December 31, 2014	6,593	[1]
Weighted Average Price (in dollars)
Options outstanding at July 1, 2014	$52
Options granted	$83
Options exercised	$40
Options canceled	$57
Options increased for spin-off adjustment ratio	$47
CDK employee options replaced at spin-off with CDK awards	$54
Options outstanding at December 31, 2014	$47	[1]
Employee Stock Option [Member]
Number of Options (in thousands)
Other share increase (decrease)	849
CDK Global Inc [Member] | Employee Stock Option [Member]
Number of Options (in thousands)
Other share increase (decrease)	-823
[1]	{F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOmIzOTY2Yzc4YWFjMzRlNzI5OTdmZWUyY2EwMDJhNGE4fFRleHRTZWxlY3Rpb246QTcxQ0U5Qzc2M0REMTk1NTBCNUMzMTU3OUQ0NDkzQUQM}

Employee_Benefit_Plans_TimeBas

Employee Benefit Plans (Time-Based Restricted shares and units) (Details)	6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Time-Based Restricted Stock [Member]
Number of Shares (in thousands)
Restricted shares/units outstanding at July 1, 2014	2,341
Restricted shares/units granted	903
Restricted shares/units vested	-1,068
Restricted shares/units forfeited	-87
Other share increase (decrease)	267
Restricted shares/units outstanding at December 31, 2014	2,167
Time-Based Restricted Stock Units [Member]
Number of Shares (in thousands)
Restricted shares/units outstanding at July 1, 2014	571
Restricted shares/units granted	215
Restricted shares/units vested	-250
Restricted shares/units forfeited	-32
Other share increase (decrease)	64
Restricted shares/units outstanding at December 31, 2014	525
CDK Global Inc [Member] | Time-Based Restricted Stock [Member]
Number of Shares (in thousands)
Other share increase (decrease)	189
CDK Global Inc [Member] | Time-Based Restricted Stock Units [Member]
Number of Shares (in thousands)
Other share increase (decrease)	43

Employee_Benefit_Plans_Perform

Employee Benefit Plans (Performance based restricted shares and units) (Details)	6 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2014
Performance-Based Restricted Stock [Member]
Number of Shares (in thousands)
Restricted shares/units outstanding at July 1, 2014	803
Restricted shares/units granted	339
Restricted shares/units vested	-223
Restricted shares/units forfeited	-44
Other share increase (decrease)	118
Restricted shares/units outstanding at December 31, 2014	948
Performance Based Restricted Stock Unit [Domain]
Number of Shares (in thousands)
Restricted shares/units outstanding at July 1, 2014	318
Restricted shares/units granted	217
Restricted shares/units vested	-13
Restricted shares/units forfeited	-10
Other share increase (decrease)	67
Restricted shares/units outstanding at December 31, 2014	544
CDK Global Inc [Member] | Performance-Based Restricted Stock [Member]
Number of Shares (in thousands)
Other share increase (decrease)	45
CDK Global Inc [Member] | Performance Based Restricted Stock Unit [Domain]
Number of Shares (in thousands)
Other share increase (decrease)	35

Employee_Benefit_Plans_Assumpt

Employee Benefit Plans (Assumptions Used To Estimate Fair Value For Stock Options Granted) (Details) (USD $)	6 Months Ended
	Dec. 31, 2014		Dec. 31, 2013
Share-based Arrangements with Employees and Nonemployees [Abstract]
Risk-free interest rate	1.90%		1.50%
Dividend yield	2.30%		2.40%
Weighted average volatility factor	22.80%		23.60%
Weighted average expected life (in years)	5 years 4 months 17 days		5 years 4 months 24 days
Weighted average fair value (in dollars) (A)	$12.45	[1]	$10.94	[1]
[1]	(A) The weighted average fair values were adjusted to reflect the impact of the spin-off of CDK.

Employee_Benefit_Plans_Compone1

Employee Benefit Plans (Components Of Net Pension Expense) (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]
Service cost – benefits earned during the period	$16.50	$16.60	$35.70	$33.20
Interest cost on projected benefits	15.7	15.7	31.5	31.3
Expected return on plan assets	-32.5	-29.9	-65	-59.7
Net amortization and deferral	4.3	5	8.7	10
Curtailments and special termination benefits	0	0	3.2	0
Net pension expense	$4	$7.40	$14.10	$14.80

Income_Taxes_Details

Income Taxes (Details)	3 Months Ended		6 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Effective Income Tax Rate, Percent	33.30%	32.00%	33.70%	33.10%

Commitments_And_Contingencies_1

Commitments And Contingencies Decrease in Future Minimum Lease Obligations (Details) (USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
Decrease in operating leases due to disposal:
2015	$32
2016	22.1
2017	12.7
2018	5.2
2019	3.8
Thereafter	5.6
Total	81.4
Decrease in purchase obligations due to disposal
Current Year	2.9
Next Fiscal Year	4.1
After Two Years	2.4
Incremental Increase in Purchase Obligation due within Four years	43.1
Incremental Increase in Purchase Obligation due within Five years	$87.30

Foreign_Currency_Risk_Manageme1

Foreign Currency Risk Management (Details)	Dec. 31, 2014
Foreign Currency Risk Management [Abstract]
Derivative, Number of Instruments Held	0

Reclassification_out_of_Accumu2

Reclassification out of Accumulated Other Comprehensive Income (Details) (USD $)	3 Months Ended				6 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2014		Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income, beginning balance	($74.10)		$70.50		$178.20		$15.40
Other comprehensive (loss)/income before reclassification adjustments	-37.4		-81.3		-240.4		-23.3
Tax effect	-6.1		25.5		27.9		20.5
Reclassification adjustments to net earnings	4.1		-6.4		11.5		-4.7
Tax effect	-1.2		2.4		-3.7		2.8
Reclassification adjustments to retained earnings					-88.2
Accumulated other comprehensive income, ending balance	-114.7		10.7		-114.7		10.7
Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income, beginning balance	-97.6		82.9		99.5		39.6
Other comprehensive (loss)/income before reclassification adjustments	-56.8		-6.8		-165.7		36.5
Tax effect	0		0		0		0
Reclassification adjustments to net earnings	0		0		0		0
Tax effect	0		0		0		0
Reclassification adjustments to retained earnings					-88.2	[1]
Accumulated other comprehensive income, ending balance	-154.4		76.1		-154.4		76.1
Net Gains/Losses on Available-for-sale Securities [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income, beginning balance	151		194.3		211.6		186.7
Other comprehensive (loss)/income before reclassification adjustments	19.4		-74.5		-74.7		-59.8
Tax effect	-6.1		25.5		27.9		20.5
Reclassification adjustments to net earnings	-0.9	[2]	-11.6	[2]	-1.7	[2]	-15	[2]
Tax effect	0.3		4.3		0.6		5.6
Reclassification adjustments to retained earnings					0
Accumulated other comprehensive income, ending balance	163.7		138		163.7		138
Pension Liability [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive income, beginning balance	-127.5		-206.7		-132.9		-210.9
Other comprehensive (loss)/income before reclassification adjustments	0		0		0		0
Tax effect	0		0		0		0
Reclassification adjustments to net earnings	5	[3]	5.2	[3]	13.2	[3]	10.3	[3]
Tax effect	-1.5		-1.9		-4.3		-2.8
Reclassification adjustments to retained earnings					0
Accumulated other comprehensive income, ending balance	($124)		($203.40)		($124)		($203.40)
[1]	(C) Reclassification adjustment out of AOCI is related to the CDK spin-off and included in retained earnings on the Consolidated Balance Sheets.
[2]	(A) Reclassification adjustments out of AOCI are included within Other income, net, on the Statements of Consolidated Earnings.
[3]	(B) Reclassification adjustments out of AOCI are included in net pension expense (see Note 10).

Financial_Data_By_Segment_Narr

Financial Data By Segment (Narrative) (Details)	6 Months Ended
	Dec. 31, 2014
Interim Financial Data By Segment [Abstract]
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		6 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Revenues from Continuing Operations	$2,661.30	$2,493.70	$5,235.10	$4,855.70
Earnings from Continuing Operations before Income Taxes	501.1	462	953.6	865.6
Employer Services [Member]
Segment Reporting Information [Line Items]
Revenues from Continuing Operations	2,169.90	2,082.10	4,269	4,045.30
Earnings from Continuing Operations before Income Taxes	627.4	596	1,211.50	1,119.30
PEO Services [Member]
Segment Reporting Information [Line Items]
Revenues from Continuing Operations	625.8	531.1	1,220.80	1,036.10
Earnings from Continuing Operations before Income Taxes	78.7	59.5	145.4	111.4
Other Segments [Member]
Segment Reporting Information [Line Items]
Revenues from Continuing Operations	-2.7	-0.2	-2.9	0
Earnings from Continuing Operations before Income Taxes	-73.3	-74.2	-151.5	-139.4
Client Fund Interest [Member]
Segment Reporting Information [Line Items]
Revenues from Continuing Operations	-131.7	-119.3	-251.8	-225.7
Earnings from Continuing Operations before Income Taxes	($131.70)	($119.30)	($251.80)	($225.70)