CDK Global (CDK) 10-Q 30 Apr 15 2015 Q3 Quarterly report Financial data

Document_And_Entity_Informatio

Document And Entity Information	9 Months Ended
	Mar. 31, 2015	Apr. 27, 2015
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Mar-15
Entity Registrant Name	CDK Global, Inc.
Entity Central Index Key	1609702
Current Fiscal Year End Date	-24
Entity Filer Category	Non-accelerated Filer
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Entity Common Stock, Shares Outstanding		160,316,124

Condensed_Consolidated_and_Com

Condensed Consolidated and Combined Statements of Operations Statement (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Income Statement [Abstract]
Revenues	$526.40	$501.10	$1,560.40	$1,470.90
Expenses:
Cost of revenues	321.8	304.9	956.6	900.5
Selling, general and administrative expenses	105.5	96.1	321.9	303.4
Separation costs	0.6	0	34.6	0
Total expenses	427.9	401	1,313.10	1,203.90
Operating earnings	98.5	100.1	247.3	267
Interest expense	-9.3	-0.2	-19.4	-0.7
Other income, net	1.8	0.6	4.7	1.8
Earnings before income taxes	91	100.5	232.6	268.1
Provision for income taxes	-32.8	-29.1	-89	-86.9
Net earnings	58.2	71.4	143.6	181.2
Less: net earnings attributable to noncontrolling interest	1.9	1.8	5.9	5.2
Net earnings attributable to CDK	$56.30	$69.60	$137.70	$176
Net earnings attributable to CDK per common share:
Basic (usd per share)	$0.35	$0.43	$0.86	$1.10
Diluted (usd per share)	$0.35	$0.43	$0.85	$1.10
Weighted-average common shares outstanding:
Basic	160.6	160.6	160.7	160.6
Diluted	161.9	160.6	161.5	160.6
Dividends declared per common share (usd per share)	$0.12	$0	$0.24	$0

Recovered_Sheet1

Condensed Consolidated and combined Statements of Comprehensive Income (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net earnings	$58.20	$71.40	$143.60	$181.20
Other comprehensive (loss) income:
Currency translation adjustments	-23.2	6.4	-40.1	30.4
Other comprehensive (loss) income	-23.2	6.4	-40.1	30.4
Comprehensive income	35	77.8	103.5	211.6
Less: comprehensive income attributable to noncontrolling interest	1.9	1.8	5.9	5.2
Comprehensive income attributable to CDK	$33.10	$76	$97.60	$206.40

Condensed_Consolidated_and_Com1

Condensed Consolidated and Combined Balance Sheets (USD $)	Mar. 31, 2015	Jun. 30, 2014
In Millions, unless otherwise specified
Current assets:
Cash and cash equivalents	$368.50	$402.80
Accounts receivable, net of allowance for doubtful accounts of $12.7 and $12.2, respectively	352.8	310.7
Notes receivable from ADP and its affiliates	0	40.6
Other current assets	185.1	164.1
Total current assets	906.4	918.2
Property, plant and equipment, net	85.3	82.6
Other assets	245.4	233.1
Goodwill	1,169.10	1,230.90
Intangible assets, net	103.1	133.8
Total assets	2,509.30	2,598.60
Current liabilities:
Current maturities of long-term debt	12.5	0
Accounts payable	20.9	17.2
Accrued expenses and other current liabilities	161.5	158
Accrued payroll and payroll-related expenses	97.3	105.6
Short-term deferred revenues	183.5	194.8
Notes payable to ADP and its affiliates	0	21.9
Total current liabilities	475.7	497.5
Long-term debt	981.3	0
Long-term deferred revenues	179.4	182.8
Deferred income taxes	73.3	76.5
Other liabilities	35.6	32.5
Total liabilities	1,745.30	789.3
Equity:
Preferred stock, $0.01 par value: Authorized, 50.0 shares; issued and outstanding, none	0	0
Common stock, $0.01 par value: Authorized, 650.0 shares; issued, 161.1 shares; outstanding, 160.4 shares	1.6	0
Additional paid-in-capital	677.2	0
Retained earnings	59.9	0
Treasury stock, at cost: 0.7 shares	-32.2	0
Net parent company investment	0	1,712.20
Accumulated other comprehensive income	45.6	85.7
Total CDK stockholders' equity	752.1	1,797.90
Noncontrolling interest	11.9	11.4
Total equity	764	1,809.30
Total liabilities and equity	$2,509.30	$2,598.60

Condensed_Consolidated_and_Com2

Condensed Consolidated and Combined Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2015	Jun. 30, 2014
In Millions, except Share data, unless otherwise specified
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$12.70	$12.20
Preferred stock, par value (in usd per share)	$0.01	$0
Preferred stock, shares authorized	50,000,000	0
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in usd per share)	$0.01	$0
Common stock, shares authorized	650,000,000	0
Common stock, shares issued	161,100,000	0
Common stock, shares outstanding	160,400,000	0
Treasury stock shares	700,000	0

Condensed_Consolidated_and_Com3

Condensed Consolidated and Combined Statements of Cash Flows (USD $)	9 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Cash Flows from Operating Activities:
Net earnings	$143.60	$181.20
Adjustments to reconcile net earnings to cash flows provided by operating activities:
Depreciation and amortization	57.1	39.6
Deferred income taxes	-2	-14.1
Stock-based compensation expense	22	15
Pension expense	0.8	2.9
Other	-5.9	-7.1
Changes in operating assets and liabilities, net of effects from acquisitions and divestitures of businesses:
Increase in accounts receivable	-55.6	-36
Increase in other assets	-19.1	-11.7
Increase/(decrease) in accounts payable	4.7	-2.5
Increase/(decrease) in accrued expenses and other liabilities	14.6	-24.7
Net cash flows provided by operating activities	160.2	142.6
Cash Flows from Investing Activities:
Capital expenditures	-27.2	-30.4
Proceeds from sale of property, plant and equipment	0.9	0
Capitalized software	-7.5	-4.6
Acquisitions of businesses, net of cash acquired	0	-25.7
Contributions to investments	-14.6	0
Proceeds from (advances) on notes receivable from ADP and its affiliates	40.6	-2.5
Net cash flows used in investing activities	-7.8	-63.2
Cash Flows from Financing Activities:
Repayments of notes payable to ADP and its affiliates	-21.9	-2.1
Borrowings on notes payable to ADP and its affiliates	0	1
Net transactions of parent company investment	-240.8	12.1
Proceeds from long-term debt	1,750	0
Repayments of long-term debt	-756.2	0
Dividend paid to ADP at separation	-825	0
Dividends paid to stockholders	-38.8	0
Repurchases of common stock	-32.2	0
Proceeds from exercises of stock options	6.9	0
Excess tax benefit from stock-based compensation awards	9.7	7.2
Withholding tax payment for stock-based compensation awards	-0.9	0
Payment of deferred financing costs	-9.2	0
Dividend payments of CVR to noncontrolling owners	-5.4	-8
Net cash flows (used in) provided by financing activities	-163.8	10.2
Effect of exchange rate changes on cash and cash equivalents	-22.9	-5.9
Net change in cash and cash equivalents	-34.3	83.7
Cash and cash equivalents, beginning of period	402.8	276.3
Cash and cash equivalents, end of period	368.5	360
Cash paid for:
Income taxes and foreign withholding taxes, net of refunds	67.3	13.2
Interest	$2.70	$0.70

Condensed_Consolidated_and_Com4

Condensed Consolidated and Combined Statement of Equity (USD $)	Total	Common Stock	Additional Paid-in-Capital	Retained Earnings	Treasury Stock	Net Parent Company Investment	Accumulated Other Comprehensive Income	Total CDK Stockholders' Equity	Non-controlling Interest
In Millions, unless otherwise specified
Stockholders' equity, beginning balance at Jun. 30, 2014	$1,809.30	$0	$0	$0	$0	$1,712.20	$85.70	$1,797.90	$11.40
Common stock, shares outstanding, beginning balance at Jun. 30, 2014	0	0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	143.6			98.7		39		137.7	5.9
Foreign currency translation adjustments	-40.1						-40.1	-40.1
Net distributions to Parent	-271.8			0		-271.8		-271.8
Dividend paid to ADP at separation	-825			0		-825		-825
Reclassification of parent company investment, shares		160.6
Reclassification of parent company investment, value	0	1.6	652.8	0		-654.4		0
Stock-based compensation expense	12.4		12.4					12.4
Common stock issued for the exercise of stock-based compensation awards, shares		0.5
Common stock issued for the exercise of stock-based compensation awards, value	7.1	0	7.1					7.1
Excess tax benefit from stock-based compensation awards	5.8		5.8					5.8
Withholding tax payment for stock-based compensation awards	-0.9		-0.9					-0.9
Dividends paid to stockholders	-38.8			-38.8				-38.8
Repurchases of common stock	-32.2				-32.2			-32.2
Dividend payments of CVR to noncontrolling owners	-5.4								-5.4
Stockholders' equity, ending balance at Mar. 31, 2015	$764	$1.60	$677.20	$59.90	($32.20)	$0	$45.60	$752.10	$11.90
Common stock, shares outstanding, end balance at Mar. 31, 2015	160.4	161.1

Basis_of_Presentation

Basis of Presentation	9 Months Ended
	Mar. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation
	A. Spin-off
	On April 9, 2014, the board of directors of Automatic Data Processing, Inc. (“ADP” or the “Parent”) approved the spin-off of the Dealer Services business of ADP ("Dealer Services"). On May 6, 2014, in preparation of the spin-off, ADP formed Dealer Services Holdings LLC, a Delaware limited liability company, to hold Dealer Services. On September 1, 2014, Dealer Services Holdings LLC was renamed CDK Global Holdings, LLC. On September 29, 2014, immediately prior to the spin-off, CDK Global Holdings, LLC converted to CDK Global, Inc. ("CDK" or the "Company"). On September 30, 2014 (the "Separation Date"), the spin-off became effective and ADP distributed 100% of the common stock of the Company to the holders of record of ADP's common stock as of September 24, 2014 (the "Distribution"). The Distribution was made pursuant to a Separation and Distribution Agreement by which ADP contributed the subsidiaries that operated the Dealer Services business to the Company. The Distribution is expected to be a tax-free transaction under Section 355 and other related provisions of the Internal Revenue Code of 1986, as amended.
	Concurrent with the Distribution, the Company and ADP entered into several agreements providing for transition services and governing relationships between the Company and ADP. Refer to Notes 7 and 10 for further information.
	B. Description of Business
	The Company is a global provider of integrated technology solutions to the information technology and marketing/advertising markets of the automotive retail industry. The Company’s solutions enable automotive retailers and original equipment manufacturers (“OEMs”) to better manage, analyze and grow their businesses. The Company classifies its operations into the following reportable segments: Automotive Retail North America, Automotive Retail International, and Digital Marketing. In addition, the Company has an “Other” segment, the primary components of which are corporate allocations and other expenses not recorded in the segment results, such as stock-based compensation expense, corporate costs, separation costs, and interest expense.
	C. Basis of Preparation
	The financial statements presented herein represent (i) periods prior to September 30, 2014 when the Company was a wholly owned subsidiary of ADP (referred to as "combined financial statements") and (ii) periods subsequent to September 30, 2014 when the Company became a separate publicly-traded company (referred to as "consolidated financial statements"). Throughout this Quarterly Report on Form 10-Q when we refer to the "financial statements," we are referring to the "condensed consolidated and combined financial statements," unless the context indicates otherwise. Beginning with the interim periods ending March 31, 2015, the Company elected to present two separate statements for the statements of operations and comprehensive income as opposed to a single continuous statement of comprehensive income.
	The financial statements include the accounts of Computerized Vehicle Registration, Inc. ("CVR") in which CDK holds a controlling financial and management interest. All significant intercompany transactions and balances between consolidated CDK businesses have been eliminated.
	The accompanying financial statements have been prepared in accordance with accounting principles generally accepted in the United States (“GAAP”). The preparation of the financial statements in conformity with GAAP requires management to make estimates and assumptions that affect assets, liabilities, revenues, and expenses that are reported in the accompanying financial statements and footnotes thereto. Actual results may differ from those estimates. These financial statements present the consolidated and combined financial position and results of operations of the Company, which was under common control and common management by ADP until the Separation Date. The historical financial results in the accompanying financial statements presented may not be indicative of the results that would have been achieved had the Company operated as a separate, stand-alone entity.
	The accompanying financial statements reflect all adjustments which, in the opinion of management, are necessary for a fair presentation of the results for the interim periods. Interim financial results are not necessarily indicative of financial results for a full year. The financial statements in this Quarterly Report on Form 10-Q should be read in conjunction with the combined financial statements and related notes of the Company as of and for the fiscal year ended June 30, 2014 as filed with the Securities and Exchange Commission in the Registration Statement on Form 10 relating to the Distribution.
	Prior to the Distribution, the financial statements in this Quarterly Report on Form 10-Q included costs for facilities, functions, and services used by the Company at shared ADP sites and costs for certain functions and services performed by centralized ADP organizations and directly charged to the Company based on revenue and headcount. Following the Distribution, the Company performs these functions using internal resources or purchased services, certain of which may be provided by ADP during a transitional period pursuant to the transition services agreement. Refer to Note 10 for further information on agreements entered into with ADP as a result of the Distribution. The expenses allocated to the Company for these services are not necessarily indicative of the expenses that would have been incurred if the Company had been a separate, independent entity and had otherwise managed these functions. The Company’s financial statements include the following transactions with ADP or its affiliates:
	Separation Costs. The financial statements of the Company include certain incremental costs that are directly attributable to the Distribution. Prior to the Distribution, separation costs were paid by ADP and allocated to the Company. These costs were related to professional services and amounted to $0.6 million and $34.6 million for the three and nine months ended March 31, 2015, respectively. The Company did not incur any separation costs during the three and nine months ended March 31, 2014.
	Overhead Expenses. Prior to the Distribution, the financial statements of the Company included an allocation of certain general expenses of ADP and its affiliates, which were in support of the Company, including departmental costs for travel, procurement, treasury, tax, internal audit, risk management, real estate, benefits, and other corporate and infrastructure costs. The Company was allocated overhead costs related to ADP's shared functions of $7.4 million for the three months ended March 31, 2014 and $7.1 million and $21.9 million for the nine months ended March 31, 2015 and 2014, respectively. These costs were reported in selling, general and administrative expenses on the consolidated and combined statements of operations. These allocations were based on a variety of factors. The allocation of the travel department costs was based on the estimated percentage of travel directly related to the Company. The allocation of benefits was based on the approximate benefit claims or payroll costs directly related to the Company as compared to ADP’s total claims and payroll costs. The allocation of real estate management costs was based on the estimated percentage of square footage of facilities for the Company's business that was managed by the ADP corporate real estate department in relation to ADP’s total managed facilities. All other allocations were based on an estimated percentage of support staff time or system utilization in comparison to ADP as a whole. Management believes that these allocations were made on a reasonable basis.
	Royalty Fees. Prior to the Distribution, the financial statements included a trademark royalty fee charged by ADP to the Company based on revenues for licensing fees associated with the use of the ADP trademark. The Company was charged trademark royalty fees of $5.6 million for the three months ended March 31, 2014 and $5.7 million and $16.3 million for the nine months ended March 31, 2015 and 2014, respectively. These charges were included in selling, general, and administrative expenses on the consolidated and combined statements of operations. Management believes that these allocations were made on a reasonable basis.
	Services Received from Affiliated Companies. Prior to the Distribution, certain systems development functions were outsourced to an ADP shared services facility located in India. This facility provided services to the Company as well as to other ADP affiliates. The Company purchased services from this facility of $5.2 million for the three months ended March 31, 2014 and $5.5 million and $14.2 million for the nine months ended March 31, 2015 and 2014, respectively. The charge for these services was included within cost of revenues on the consolidated and combined statements of operations.
	Notes Receivable from ADP and its Affiliates and Notes Payable to ADP and its Affiliates. As of June 30, 2014, the Company recorded notes receivable from ADP and its affiliates of $40.6 million and notes payable to ADP and its affiliates of $21.9 million under contractual arrangements. Prior to the Distribution, the notes were settled; therefore, there were no outstanding notes receivable from or payable to ADP and its affiliates in the accompanying consolidated balance sheet as of March 31, 2015. Interest income on notes receivable from ADP and its affiliates was $0.2 million for the three months ended March 31, 2014 and was $0.2 million and $0.6 million for the nine months ended March 31, 2015 and 2014, respectively. The Company recorded interest income on notes receivable from ADP and its affiliates within other income, net on the consolidated and combined statements of operations. Interest expense on notes payable to ADP and its affiliates was $0.3 million for the three months ended March 31, 2014 and was $0.2 million and $0.7 million for the nine months ended March 31, 2015 and 2014, respectively. The Company recorded interest expense on notes payable to ADP and its affiliates within interest expense on the consolidated and combined statements of operations.
	Other Services. Prior to the Distribution, the Company received other services from ADP and its affiliates (e.g., payroll processing services). The Company was charged primarily at a fixed rate per employee per month for such payroll processing services. Expenses incurred for such services were $0.3 million for the three months ended March 31, 2014 and $0.4 million and $0.9 million for the nine months ended March 31, 2015 and 2014, respectively. These expenses were included in selling, general and administrative expenses on the consolidated and combined statements of operations.
	D. Financial Statement Revisions
	During the three months ended March 31, 2015, the Company elected to make revisions to previously reported results of operations, financial condition, and cash flows as discussed below. The Company previously reported results of operations and cash flows for the nine months ended March 31, 2014, financial condition as of June 30, 2014, and revenues, earnings before income taxes, and net earnings for the three months ended March 31, 2014 in the Registration Statement on Form 10. The Company assessed the materiality of the misstatements discussed below on prior period financial statements and concluded that while such revisions are immaterial to the combined results of operations and cash flows for the nine months ended March 31, 2014, financial condition as of June 30, 2014, and revenues, earnings before income taxes, and net earnings for the three months ended March 31, 2014 presented herein, the combined financial statements should be revised to provide greater comparability. The Company plans to reflect the effect of the revisions on previously reported annual periods in its exchange offer registration statement to exchange the Company's senior notes for a new issue of substantially identical debt securities registered under the Securities Act (as described in Note 5).
	Historically, leases of certain hardware components included within Dealer Management Systems ("DMS") and integrated solutions were accounted for as operating leases and revenues were recognized in accordance with Accounting Standards Codification ("ASC") 840, "Leases." The Company has now determined that these hardware components should be reported as sales-type leases in accordance with ASC 840, "Leases." In accordance with sales-type lease accounting, revenue for leased hardware is recognized upon installation and a receivable is recorded based on the present value of the minimum lease payments at the beginning of the lease term. The Company's combined financial statements have been revised to reflect sales-type lease accounting for these hardware components as well as the related income tax effects. This revision impacted the Automotive Retail North America and Automotive Retail International segments and all of these revisions are immaterial. Segment revenues and earnings before income taxes in Note 11 for the nine months ended March 31, 2014 include the effects of this revision.
	The Company revised the presentation of the noncontrolling interest ("NCI") in CVR to comply with ASC 810, "Consolidations." Accordingly, earnings, comprehensive income, and net assets in CVR which are not attributable to the Company have been separately presented within the combined financial statements. Historically, the NCI in CVR's earnings was included within selling, general and administrative expenses in the combined statements of operations, and the NCI in CVR's net assets was included within other liabilities in the combined balance sheets. This revision impacted the Automotive Retail North America segment and earnings before income taxes in Note 11 for the nine months ended March 31, 2014 reflect this revision.
	The following are selected line items from the Company's combined financial statements illustrating the effect of these immaterial revisions:
	Condensed Combined Statements of Operations
		Nine Months Ended March 31, 2014
					Adjustments
		As Reported			Hardware			NCI			As Revised
	Revenues	$	1,469.30		$	1.6		$	—		$	1,470.90
	Cost of revenues	899.1			1.4			—			900.5
	Selling, general and administrative	308.3			0.3			(5.2		)	303.4
	Total expenses	1,207.40			1.7			(5.2		)	1,203.90
	Operating earnings	261.9			(0.1		)	5.2			267
	Other income, net	0.1			1.7			—			1.8
	Earnings before income taxes	261.3			1.6			5.2			268.1
	Provision for income taxes	(86.3		)	(0.6		)	—			(86.9		)
	Net earnings	175			1			5.2			181.2
	Less: net earnings attributable to noncontrolling interest	—			—			5.2			5.2
	Net earnings attributable to CDK	$	175		$	1		$	—		$	176
		Three Months Ended March 31, 2014
					Adjustments
		As Reported			Hardware			NCI			As Revised
	Revenues	$	500.5		$	0.6		$	—		$	501.1
	Earnings before income taxes	98.3			0.4			1.8			100.5
	Net earnings	69.3			0.3			1.8			71.4
	Less: net earnings attributable to noncontrolling interest	—			—			1.8			1.8
	Net earnings attributable to CDK	$	69.3		$	0.3		$	—		$	69.6
	Condensed Combined Statement of Comprehensive Income
		Nine Months Ended March 31, 2014
					Adjustments
		As Reported			Hardware			NCI			As Revised
	Net earnings	$	175		$	1		$	5.2		$	181.2
	Other comprehensive income:
	Currency translation adjustments	30.4			—			—			30.4
	Other comprehensive income	30.4			—			—			30.4
	Comprehensive income	205.4			1			5.2			211.6
	Less: comprehensive income attributable to noncontrolling interest	—			—			5.2			5.2
	Comprehensive income attributable to CDK	$	205.4		$	1		$	—		$	206.4
	Condensed Combined Balance Sheet
		30-Jun-14
					Adjustments
		As Reported			Hardware			NCI			As Revised
	Assets
	Current assets:
	Accounts receivable, net	$	299.1		$	11.6		$	—		$	310.7
Other current assets	164.6			(0.5		)	—			164.1
Total current assets	907.1			11.1			—			918.2
Property, plant and equipment, net	109.9			(27.3		)	—			82.6
Other assets	205.5			27.6			—			233.1
Total assets	$	2,587.20		$	11.4		—			$	2,598.60
Liabilities and Equity
Current liabilities:
Accrued expenses and other current liabilities	$	154.2		$	3.8		$	—		$	158
Total current liabilities	493.7			3.8			—			497.5
Deferred income taxes	76.6			(0.1		)	—			76.5
Other liabilities	43.9			—			(11.4		)	32.5
Total liabilities	797			3.7			(11.4		)	789.3
Equity:
Net parent company investment	1,704.60			7.6			—			1,712.20
Accumulated other comprehensive income	85.6			0.1			—			85.7
Total CDK stockholders' equity	1,790.20			7.7			—			1,797.90
Noncontrolling interest	—			—			11.4			11.4
Total equity	1,790.20			7.7			11.4			1,809.30
Total liabilities and equity	$	2,587.20		$	11.4		$	—		$	2,598.60
Condensed Combined Statement of Cash Flows
	Nine Months Ended March 31, 2014
				Adjustments
	As Reported			Hardware			NCI			As Revised
Cash Flows from Operating Activities:
Net earnings	$	175		$	1		$	5.2		$	181.2
Adjustments to reconcile net earnings to cash flows provided by operating activities:
Depreciation and amortization	51.2			(11.6		)	—			39.6
Deferred income taxes	(14.7		)	0.6			—			(14.1		)
Other	(0.7		)	(1.2		)	(5.2		)	(7.1		)
Changes in operating assets and liabilities, net of effects from acquisitions and divestitures of businesses:
Increase in accounts receivable	(34.9		)	(1.1		)	—			(36.0		)
Increase in other assets	(9.5		)	(2.2		)	—			(11.7		)
(Decrease)/increase in accrued expenses and other liabilities	(32.8		)	0.1			8			(24.7		)
Net cash flows provided by/(used in) operating activities	149			(14.4		)	8			142.6
Cash Flows from Investing Activities:
Capital expenditures	(44.8		)	14.4			—			(30.4		)
Net cash flows (used in)/provided by investing activities	(77.6		)	14.4			—			(63.2		)
Cash Flows from Financing Activities:
Dividend payments of CVR to minority owners	—			—			(8.0		)	(8.0		)
Net cash flows provided by/(used in) financing activities	18.2			—			(8.0		)	10.2
Combined Statement of Equity
	30-Jun-14
				Adjustments
	As Reported			Hardware			NCI			As Revised
Net Parent Company Investment
Balance as of June 30, 2014	$	1,704.60		$	7.6		$	—		1,712.20
Accumulated Other Comprehensive Income
Balance as of June 30, 2014	85.6			0.1			—			85.7
Total CDK Stockholders' Equity
Balance as of June 30, 2014	1,790.20			7.7			—			1,797.90
Noncontrolling Interest
Balance as of June 30, 2014	—			—			11.4			11.4
Total Equity
Balance as of June 30, 2014	$	1,790.20		7.7			$	11.4		$	1,809.30
E. Significant Accounting Policies
Revenue Recognition. Revenue is generated from software licenses, hosting arrangements, hardware sales and leases, support and maintenance, professional services, advertising and digital marketing, as well as certain transactional services.
The Company recognizes software related revenue (on-site) in accordance with the provisions of ASC 985-605, “Software-Revenue Recognition,” and non-software related revenue, upfront hardware sales, and software delivered under a hosted model in accordance with ASC 605, "Revenue Recognition."
In general, revenue is recognized when all of the following criteria have been met:
•	persuasive evidence of an arrangement exists;
•	delivery has occurred or services have been rendered;
•	fees are fixed or determinable; and
•	collection of the revenue is reasonably assured.
The following are the Company’s major components of revenue:
•	Bundled sales of DMS and integrated solutions. In the Automotive Retail North America and Automotive Retail International segments, the Company receives fees for product installation, monthly fees for software licenses, ongoing software support and maintenance of DMS and other integrated solutions that are either hosted by the Company or installed on-site at the client’s location. The revenues for term licenses are recognized ratably over the software license term, as vendor-specific objective evidence of the fair values of the individual elements in the sales arrangement does not exist. Revenue recognition commences at the installation dates, when client acceptance has occurred, and collectability of a determinable amount is probable. In the case of hosted applications, the client does not have the contractual right to take possession of the software and the items delivered at the outset of the contract (e.g., installation, training, etc.) do not have value to the client without the software license and ongoing support and maintenance. Any upfront fees charged in the case of hosted arrangements are recognized ratably over the expected benefit period of the arrangement, typically five years. The unrecognized portion of these revenue elements is recorded as deferred revenue.
The Company also offers various hardware elements in connection with DMS and integrated solution sales, which in some instances are considered sales-type leases under ASC 840. Revenue related to leased hardware is recognized upon installation and a receivable is recorded based on the present value of the minimum lease payments at the beginning of the lease term.
•	Transactional revenues. The Company receives revenues on a fee per transaction processed basis in connection with providing auto retailers interfaces with third parties to process credit reports, vehicle registrations, data updates, and Internet sales leads. Transactional revenues are recorded in accordance with ASC 605. Delivery occurs at the time the services are rendered. Transactional revenues are recorded in revenues gross of costs incurred for credit report processing, vehicle registrations, and Internet sales leads as the Company is contractually responsible for providing the service, software, and/or connectivity to the clients, and therefore, the Company is the primary obligor under ASC 605.
•	Digital Marketing services. The Company receives revenues from the placement of advertising for clients and providing websites and related advertising and marketing services. Digital marketing revenues are recorded in accordance with ASC 605 as delivery occurs at the time the services are rendered.
Deferred Costs. Costs to deliver services are expensed to cost of revenues as incurred with the exception of specific costs directly related to transition or installation activities, including the payroll related costs for the Company's implementation and training teams, as well as commission costs for the sale. These costs are deferred and expensed proportionately over the same period that the deferred revenue is recognized as revenue. Deferred amounts are monitored regularly for impairment. Impairment losses are recorded when projected remaining undiscounted operating cash flows of the related contracts are not sufficient to recover the carrying amount of the contract assets. Current deferred costs classified within other current assets on the consolidated and combined balance sheets were $116.4 million and $120.3 million as of March 31, 2015 and June 30, 2014, respectively. Long-term deferred costs classified within other assets on the consolidated and combined balance sheets were $162.2 million and $166.8 million as of March 31, 2015 and June 30, 2014, respectively.
Computer Software to be Sold, Leased or Otherwise Marketed. The Company's policy provides for the capitalization of certain costs of computer software to be sold, leased, or otherwise marketed. The Company's policy provides for the capitalization of all software production costs upon reaching technological feasibility for a specific product. Technological feasibility is attained when software products have a completed working model whose consistency with the overall product design has been confirmed by testing. Costs incurred prior to the establishment of technological feasibility are expensed as incurred. The establishment of technological feasibility requires judgment by management and in many instances is only attained a short time prior to the general release of the software. Maintenance-related costs are expensed as incurred. Pursuant to this policy, the Company recognized expenses of $43.3 million and $41.5 million for the three months ended March 31, 2015 and 2014, respectively, and $127.2 million and $123.4 million for the nine months ended March 31, 2015 and 2014, respectively. These expenses were classified within cost of revenues on the consolidated and combined statements of operations.
Fair Value of Financial Instruments. The Company determines the fair value of financial instruments in accordance with accounting standards pertaining to fair value measurements. Such standards define fair value and establish a framework for measuring fair value in accordance with GAAP. Cash and cash equivalents, accounts receivable, other current assets, accounts payable, and other current liabilities are reflected in the consolidated and combined balance sheets at cost, which approximates fair value due to the short-term nature of these instruments. The carrying value of the Company's term loan facility (as described in Note 5), including accrued interest, approximates fair value based on the Company's current estimated incremental borrowing rate for similar types of arrangements. The approximate aggregate fair value of our senior notes as of March 31, 2015 was $764.4 million based on quoted market prices for the same or similar instruments and the carrying value was $750.0 million. The term loan facility and senior notes are considered Level 2 fair value measurements in the fair value hierarchy.

New_Accounting_Pronouncements

New Accounting Pronouncements	9 Months Ended
	Mar. 31, 2015
New Accounting Pronouncements and Changes in Accounting Principles [Abstract]
New Accounting Pronouncements	New Accounting Pronouncements
	Recently Issued Accounting Pronouncements
	In April 2015, the FASB issued ASU 2015-03, "Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs." ASU 2015-03 requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that liability, consistent with debt discounts. ASU 2015-03 is effective for fiscal years, and interim reporting periods within those years, beginning after December 15, 2015. The adoption of ASU 2015-03 will result in a reclassification of our deferred financing costs from other assets to long-term debt within the balance sheet.
	In June 2014, the FASB issued ASU 2014-12, "Compensation - Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period." ASU 2014-12 requires that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. ASU 2014-12 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2015. The adoption of ASU 2014-12 will not have an impact on the Company's consolidated results of operations, financial condition, or cash flows.
	In May 2014, the FASB issued 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.
	Recently Adopted Accounting Pronouncements
	In November 2014, the FASB issued and the Company adopted ASU 2014-17, "Business Combinations (Topic 805): Pushdown Accounting." ASU 2014-17 provides an acquired entity with an option to apply pushdown accounting in its separate financial statements upon occurrence of an event in which an acquirer obtains control of the acquired entity. An acquired entity will have the option to elect to apply pushdown accounting in a subsequent reporting period to the acquired entity's most recent change-in-control event. In connection with the FASB's issuance of ASU 2014-17, the SEC rescinded Staff Accounting Bulletin ("SAB") Topic 5.J, "New Basis of Accounting Required in Certain Circumstances." All entities, including SEC registrants, will apply ASU 2014-17 for guidance on the use of pushdown accounting. ASU 2014-17 is effective immediately. The adoption of ASU 2014-17 did not have an impact on the Company's consolidated and combined results of operations, financial condition, or cash flows.
	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 and combined results of operations, financial condition, or cash flows.

Earnings_per_Share

Earnings per Share	9 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Earnings per Share	Earnings per Share
	The numerator for both basic and diluted earnings per share is net earnings attributable to CDK. The denominator for basic and diluted earnings per share is based upon the number of weighted average shares of the Company's common stock outstanding during the reporting periods. Diluted earnings per share also reflects the dilutive effect of unexercised in-the-money stock options and unvested restricted stock. On September 30, 2014, ADP shareholders of record as of the close of business on September 24, 2014 received one share of the Company's common stock for every three shares of ADP common stock held as of the record date. For all periods prior to the Distribution, basic and diluted earnings per share were computed using the number of shares of the Company's stock outstanding on September 30, 2014, the date on which the Company's common stock was distributed to the shareholders of ADP. The same number of shares was used to calculate basic and diluted earnings per share for the three and nine months ended March 31, 2014 since there were no dilutive securities until after the Distribution.
	Holders of certain stock-based compensation awards are eligible to receive dividends as described in Note 6. Net earnings allocated to participating securities were not significant for the three and nine months ended March 31, 2015.
	The following table summarizes the components of basic and diluted earnings per share:
		Three Months Ended				Nine Months Ended
		March 31,				March 31,
		2015		2014		2015		2014
	Net earnings attributable to CDK	$	56.3	$	69.6	$	137.7	$	176
	Weighted-average shares outstanding:
	Basic	160.6		160.6		160.7		160.6
	Effect of employee stock options	0.7		—		0.4		—
	Effect of employee restricted stock	0.6		—		0.4		—
	Diluted	161.9		160.6		161.5		160.6
	Basic earnings attributable to CDK per share	$	0.35	$	0.43	$	0.86	$	1.1
	Diluted earnings attributable to CDK per share	$	0.35	$	0.43	$	0.85	$	1.1
	Options to purchase 0.3 million shares of common stock for both the three and nine months ended March 31, 2015, respectively, have been excluded from the calculation of diluted earnings per share because their exercise prices exceeded the average market price of outstanding common shares for the respective periods.

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets, Net	9 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets, Net	Goodwill and Intangible Assets, Net
	Changes in goodwill for the nine months ended March 31, 2015 were as follows:
		Automotive Retail North America			Automotive Retail International			Digital Marketing		Total
	Balance as of June 30, 2014	$	400.1		$	454.7		$	376.1	$	1,230.90
	Currency translation adjustments	(3.4		)	(58.4		)	—		(61.8		)
	Balance as of March 31, 2015	$	396.7		$	396.3		$	376.1	$	1,169.10
	Components of intangible assets, net were as follows:
		March 31,								June 30,
		2015								2014
		Original Cost			Accumulated Amortization			Intangible Assets, net		Original Cost			Accumulated Amortization			Intangible Assets, net
	Software	$	110.3		$	(94.0	)	$	16.3	$	103.9		$	(87.4	)	$	16.5
	Client lists	215			(131.4		)	83.6		222.1			(124.5		)	97.6
	Trademarks	27			(23.8		)	3.2		27.1			(7.4		)	19.7
	Other intangibles	2.4			(2.4		)	—		6			(6.0		)	—
		$	354.7		$	(251.6	)	$	103.1	$	359.1		$	(225.3	)	$	133.8
	In October 2014 following the Company's separation from ADP, the Company evaluated its branding strategy and the trademark names under which each of its businesses will operate. The Company determined that the Cobalt trademark used by the Digital Marketing segment will no longer be used. Therefore, the Company revised the estimated useful life assigned to the Cobalt trademark. The Company recognized accelerated amortization on the trademark of $15.6 million in cost of revenues during the nine months ended March 31, 2015. The effect of this change in estimate on both basic and diluted earnings per share, net of the related tax effect, was $0.06 for the nine months ended March 31, 2015.
	Other intangibles consist primarily of purchased rights, covenants, and patents (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 intangible assets is 6 years (3 years for software and software licenses, 7 years for customer contracts and lists, and 10 years for trademarks). Amortization of intangible assets was $7.0 million and $7.1 million for the three months ended March 31, 2015 and 2014, respectively, and $37.5 million and $21.5 million for the nine months ended March 31, 2015 and 2014, respectively.
	Estimated amortization expenses of the Company's existing intangible assets as of March 31, 2015 were as follows:
		Amount
	Three months ending June 30, 2015	$	7.2
	Twelve months ending June 30, 2016	24.4
	Twelve months ending June 30, 2017	18.6
	Twelve months ending June 30, 2018	15.2
	Twelve months ending June 30, 2019	9
	Twelve months ending June 30, 2020	7.8
	Thereafter	20.9
		$	103.1

Debt

Debt	9 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Debt	Debt
	Debt comprised of the following as of March 31, 2015 and June 30, 2014:
		March 31, 2015		June 30, 2014
	Revolving credit facility	$	—	$	—
	Term loan facility	243.8		—
	3.30% senior notes, due 2019	250		—
	4.50% senior notes, due 2024	500		—
	Total debt	993.8		—
	Current maturities of long-term debt	12.5		—
	Total long-term debt	$	981.3	$	—
	On September 16, 2014, the Company entered into (i) a five-year $300.0 million senior unsecured revolving credit facility (the "revolving credit facility"), which was undrawn as of March 31, 2015, and (ii) a five-year $250.0 million senior unsecured term loan facility (the "term loan facility"). The Company's revolving credit facility and term loan facility are referred together as the "Credit Facilities." The Company also entered into a $750.0 million senior unsecured bridge loan facility (the "bridge loan facility") on September 16, 2014. On September 30, 2014, the proceeds from the term loan facility and the bridge loan facility were used to pay ADP a cash dividend of $825.0 million, fees and expenses related to the Distribution, and fees related to the entry into the Credit Facilities and the bridge loan facility.
	On October 14, 2014, the Company completed an offering of 3.30% senior notes with a $250.0 million aggregate principal amount due in 2019 (the "2019 notes") and 4.50% senior notes with a $500.0 million aggregate principal amount due in 2024 (the "2024 notes" and together with the 2019 notes, the "senior notes"). The net proceeds from the offering, together with cash on hand, were used to repay the bridge loan facility.
	Revolving Credit Facility
	The revolving credit facility provides up to $300.0 million of borrowing capacity and includes a sub-limit of up to $100.0 million for loans in Euro and Sterling. In addition, the revolving credit facility contains an accordion feature that allows for an increase in the available borrowing capacity under the revolving credit facility of up to $100.0 million, subject to the agreement of lenders under the revolving credit facility or other financial institutions that become lenders to extend commitments as part of the increased revolving credit facility. Borrowings under the revolving credit facility are available for general corporate purposes. The revolving credit facility will mature on September 30, 2019, subject to no more than two one-year extensions if lenders holding a majority of the revolving commitments approve such extensions.
	The revolving credit facility is unsecured and loans thereunder bear interest, at the Company's option, at (a) the rate at which deposits in the applicable currency are offered in the London interbank market (or, in the case of borrowings in Euro, the European interbank market) plus margins varying from 1.125% to 2.000% per annum based on the Company's senior, unsecured non-credit-enhanced, long-term debt ratings from Standard & Poor's Ratings Group and Moody's Investors Services Inc. (the "Ratings") or (b) solely in the case of U.S. dollar loans, (i) the highest of (A) the prime rate of JPMorgan Chase Bank, N.A., (B) a rate equal to the average of the overnight federal funds rate with a maturity of one day plus a margin of 0.500% per annum and (C) the rate at which dollar deposits are offered in the London interbank market for a one-month interest period plus 1.000% plus (ii) margins varying from 0.125% to 1.000% per annum based on the Ratings. The unused portion of the revolving credit facility is subject to commitment fees ranging from 0.125% to 0.350% per annum based on the Ratings.
	Term Loan Facility
	The Company had $243.8 million of borrowings outstanding under the term loan facility as of March 31, 2015. The term loan facility will mature on September 16, 2019. The term loan facility is subject to amortization in equal quarterly installments of 1.25% of the aggregate principal amount of the term loans made on the closing date, with any unpaid principal amount to be due and payable on the maturity date.
	The term loan facility is unsecured and loans thereunder bear interest at the same rates as are applicable to dollar loans under the revolving credit facility. The interest rate per annum on the term loan facility was 1.68% as of March 31, 2015.
	Restrictive Covenants and Other Matters
	The Credit Facilities contain various covenants and restrictive provisions that limit the Company's subsidiaries' ability to incur additional indebtedness; the Company's ability to consolidate or merge with other entities; and the Company's subsidiaries' ability to incur liens, enter into sale and leaseback transactions, and enter into agreements restricting the ability of the Company's subsidiaries to pay dividends. If the Company fails to perform the obligations under these and other covenants, the revolving credit facility could be terminated and any outstanding borrowings, together with accrued interest, under the Credit Facilities could be declared immediately due and payable. The credit agreement also has, in addition to customary events of default, an event of default triggered by the acceleration of the maturity of any other indebtedness the Company may have in an aggregate principal amount in excess of $75.0 million.
	The Credit Facilities also contain financial covenants that provide that (i) the ratio of total consolidated indebtedness to consolidated EBITDA shall not exceed 3.50 to 1.00 and (ii) the ratio of consolidated EBITDA to consolidated interest expense shall be a minimum of 3.00 to 1.00.
	Senior Notes
	The issuance price of the senior notes was equal to the stated value. Interest is payable semi-annually on April 15 and October 15 of each year, commencing on April 15, 2015. The interest rate payable on each applicable series of senior notes is subject to adjustment from time to time if the credit ratings assigned to any series of senior notes by the rating agencies is downgraded (or subsequently upgraded). The 2019 notes will mature on October 15, 2019 and the 2024 notes will mature on October 15, 2024. The senior notes were offered to qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended (the "Securities Act"), and to certain non-U.S. persons in accordance with Regulation S under the Securities Act. The senior notes are general unsecured obligations of the Company and are not guaranteed by any of the Company's subsidiaries.
	The senior notes rank equally in right of payment with the Company's existing and future unsecured unsubordinated obligations, including the Credit Facilities. The senior notes contain covenants restricting our ability to incur additional indebtedness secured by liens, engage in sale/leaseback transactions, and merge, consolidate, or transfer all or substantially all of our assets.
	The senior notes are redeemable at the Company's option prior to September 15, 2019 for the 2019 notes and prior to July 15, 2024 for the 2024 notes at a redemption price equal to the greater of (i) 100% of the aggregate principal amount of the senior notes to be redeemed, and (ii) the sum of the present value of the remaining scheduled payments (as defined in the agreement), plus in each case, accrued and unpaid interest thereon. Subsequent to September 15, 2019 and July 15, 2024, the redemption price for the 2019 notes and the 2024 notes, respectively, will equal 100% of the aggregate principal amount of the notes redeemed, plus accrued and unpaid interest thereon. The senior notes are also subject to a change of control provision whereby each holder of the senior notes has the right to require the Company to purchase all or a portion of such holder's senior notes at a purchase price equal to 101% of the principal amount thereof plus accrued and unpaid interest upon the occurrence of both a change of control and a decline in the rating of the senior notes.
	In connection with the issuance of the senior notes, the Company entered into registration rights agreements whereby the Company agreed to use commercially reasonable efforts to file an exchange offer registration statement to exchange the senior notes for a new issue of substantially identical debt securities registered under the Securities Act. The Company has also agreed to use commercially reasonable efforts to file a shelf registration statement to cover resales of the senior notes under certain circumstances (as defined in the registration rights agreements). If the exchange offer is not completed or a shelf registration statement, if required under the registration rights agreements, does not become effective by October 14, 2015, the interest rate on the senior notes will be increased by (i) 0.25% per annum for the first 90-day period following October 14, 2015, and (ii) an additional 0.25% per annum thereafter until the exchange offer is completed, the shelf registration statement, if required, becomes effective or the senior notes of the applicable series become freely tradable. In the event that the Company receives a shelf registration request and the shelf registration statement required to be filed does not become effective by the later of October 14, 2015 and 90 days after the delivery of such shelf registration request, the interest rate on the senior notes will be increased by (i) 0.25% per annum for the first 90-day period following the shelf registration request, and (ii) an additional 0.25% per annum thereafter until the shelf registration statement becomes effective or the senior notes become freely tradable. The maximum additional interest the Company could be required to pay to the note holders under the registration payment arrangement as of March 31, 2015 is $27.4 million. As of March 31, 2015, no liability for such registration payment arrangement has been recorded as it is not considered probable that additional interest will be paid under the registration rights.
	The Company's aggregate scheduled maturities of the long-term debt as of March 31, 2015 were as follows:
		Amount
	Twelve months ended March 31, 2016	$	12.5
	Twelve months ended March 31, 2017	12.5
	Twelve months ended March 31, 2018	12.5
	Twelve months ended March 31, 2019	12.5
	Twelve months ended March 31, 2020	443.8
	Thereafter	500
		$	993.8

Stock_Based_Compensation

Stock Based Compensation	9 Months Ended
	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Based Compensation	Stock Based Compensation
	Incentive Equity Awards Converted from ADP Awards
	On October 1, 2014, ADP's outstanding equity awards for employees of the Company were converted into equity awards of CDK at a ratio of 2.757 CDK equity awards for every ADP equity award held prior to the spin-off. The converted equity awards have the same terms and conditions as the ADP equity awards. As a result, the Company issued 2.3 million stock options with a weighted average exercise price of $19.64, 0.7 million time-based restricted shares, and 0.2 million performance-based restricted shares upon completion of the conversion of existing ADP equity awards into the Company's equity awards. As the conversion was considered a modification of an award in accordance with ASC 718, "Compensation - Stock Compensation," the Company compared the fair value of the award immediately prior to the Distribution to the fair value immediately after the Distribution to measure the incremental compensation cost. The fair values immediately prior to and after Distribution were estimated using a binomial option pricing model. The conversion resulted in an increase in the fair value of the awards by $1.4 million, of which $1.0 million was recognized from the date of Distribution to March 31, 2015 and the remaining $0.4 million will be recognized in net earnings prospectively.
	Incentive Equity Awards Granted by the Company
	Prior to the Distribution, the Company adopted the 2014 Omnibus Award Plan ("2014 Plan"). The 2014 Plan provides for the granting of incentive stock options, nonqualified stock options, stock appreciation rights, restricted stock, restricted stock units, other stock-based awards and performance compensation awards to employees, directors, officers, consultants, and advisors, and those of the Company's affiliates. The 2014 Plan provides for an aggregate of 12.0 million shares of the Company's common stock to be reserved for issuance and is effective for a period of ten years.
	Prior to the Distribution, all employee equity awards (stock options and restricted stock) were granted by ADP. All subsequent awards were granted under the 2014 Plan. The Company recognizes stock-based compensation expense associated with employee equity awards in net earnings based on the fair value of the awards on the date of grant. Stock-based compensation primarily consisted of the following for the three and nine months ended March 31, 2015 and 2014:
	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 date of grant. Stock options are issued under a graded vesting schedule with a term of ten 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.
	Time-Based Restricted Stock and Time-Based Restricted Stock Units. Time-based restricted stock and restricted stock units generally vest over a two- to five-year period. 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 the CDK shares awarded under the time-based restricted stock program.
	Time-based restricted stock units are settled in cash. Compensation expense relating to the issuance of time-based restricted stock units is recorded over the vesting period, 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 to the current stock value. 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 subsequent to a service period of up to 26 months. Under these programs, the Company communicates "target awards" at the beginning of the performance period with possible payouts at the end of the performance period ranging from 0% to 150% of the "target awards." Awards are forfeited if the employee ceases to be employed by the Company prior to vesting.
	Performance-based restricted stock cannot be transferred during the vesting period. Compensation expense relating to the issuance of performance-based restricted stock is measured based upon the fair value of the award on the grant date and recognized on a straight-line basis over the vesting period, based upon the probability that the performance target will be met. After the performance period, if the performance targets are achieved, employees are eligible to receive dividends on the CDK 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 recorded over the vesting period, is initially based on the fair value of the award on the grant date, and is subsequently remeasured at each reporting date to the current stock value during the one-year performance period, based upon the probability that the performance target will be met. 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. Dividend equivalents are paid on awards settled in stock under the performance-based restricted stock unit program.
	The following table represents stock-based compensation expense and related income tax benefits for the three and nine months ended March 31, 2015 and 2014, respectively:
		Three Months Ended						Nine Months Ended
		March 31,						March 31,
		2015				2014		2015		2014
	Cost of revenues	$	2			$	1.7	$	5.8	$	4.9
	Selling, general and administrative expenses	6.6				3.5		16.2		10.1
	Total pretax stock-based compensation expense	$	8.6			$	5.2	$	22	$	15
	Income tax benefit	$	2.9			$	1.9	$	7.8	$	5.5
	Stock-based compensation expense for the nine months ended March 31, 2015 consists of $12.4 million of expense related to equity classified awards, $4.2 million of expense related to liability classified awards, and $5.4 million of expense allocated from ADP during the three months ended September 30, 2014. As of March 31, 2015, the total unrecognized compensation cost related to non-vested stock options, restricted stock units, and restricted stock awards was $5.3 million, $14.4 million, and $15.3 million, respectively, which will be amortized over the weighted average remaining requisite service periods of 2.0 years, 1.9 years, and 1.5 years, respectively.
	The activity related to the Company's incentive equity awards from the date of Distribution to March 31, 2015 consisted of the following:
	Stock Options
		Number			Weighted
		of Options			Average Exercise Price
		(in thousands)			(in dollars)
	Options outstanding as of June 30, 2014	—			$	—
	Options converted from ADP equity awards	2,269			$	19.64
	Options granted	397			$	41.71
	Options exercised	(444	)		$	15.95
	Options canceled	(18	)		$	23.23
	Options outstanding as of March 31, 2015	2,204			$	24.32
	Time-Based Restricted Stock and Time-Based Restricted Stock Units
		Number of Shares			Number of Units
		(in thousands)			(in thousands)
	Non-vested restricted shares/units as of June 30, 2014	—			—
	Restricted shares/units converted from ADP equity awards	576			127
	Restricted shares/units granted	513			180
	Restricted shares/units vested	(52	)		(7	)
	Restricted shares/units forfeited	(32	)		(12	)
	Non-vested restricted shares/units as of March 31, 2015	1,005			288
	Performance-Based Restricted Stock and Performance-Based Restricted Stock Units
		Number of Shares			Number of Units
		(in thousands)			(in thousands)
	Non-vested restricted shares/units as of June 30, 2014	—			—
	Restricted shares/units converted from ADP equity awards	70			89
	Restricted shares/units granted	—			132
	Restricted shares/units vested	—			—
	Restricted shares/units forfeited	—			—
	Non-vested restricted shares/units as of March 31, 2015	70			221
	The fair value of each stock option issued was estimated on the date of grant using the binomial option pricing model. The binomial model considers a range of assumptions related to volatility, risk-free interest rates, and employee exercise behavior. Expected volatilities utilized in the model were based on a combination of implied market volatilities and other factors. The dividend yield was based on expected future dividend payments. The risk-free rate was derived from the U.S. Treasury yield curve in effect at the time of grant. The model also incorporates exercise and forfeiture assumptions based on an analysis of historical data. The expected life of the stock option grants represents the period of time that options granted were expected to be outstanding on the date of grant.
	The following table presents the assumptions used to determine the fair value of the outstanding ADP awards converted into equity awards of CDK to measure the incremental compensation cost:
	Risk-free interest rate	1.1		%
	Dividend yield	1.1		%
	Weighted average volatility factor	23.9		%
	Weighted average expected life (in years)	3.4
	Weighted average fair value (in dollars)	$	12.5
	The following table presents the assumptions used to determine the fair value of the stock options granted after the date of Distribution through March 31, 2015:
	Risk-free interest rate	1.6		%
	Dividend yield	1.1		%
	Weighted average volatility factor	25.6		%
	Weighted average expected life (in years)	6.3
	Weighted average fair value (in dollars)	$	10.24

Income_Taxes

Income Taxes	9 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes
	Tax Matters Agreement
	The Company and ADP entered into a tax matters agreement as part of the Distribution that governs the rights and obligations of both parties after the Distribution with respect to taxes for both pre- and post-Distribution periods. Under this agreement, ADP is generally required to indemnify the Company for any income taxes attributable to ADP's operations or the Company's operations and for any non-income taxes attributable to ADP's operations, in each case for all pre-Distribution periods as well as any taxes arising from transactions effected to consummate the Distribution, and the Company generally is required to indemnify ADP for any non-income taxes attributable to the Company's operations for all pre-Distribution periods and for any income taxes attributable to the Company's operations for post-Distribution periods.
	The Company is generally required to indemnify ADP against any tax resulting from the Distribution (and against any claims made against ADP in respect of any tax imposed on its stockholders), in each case if that tax results from (i) an issuance of a significant amount of the Company's equity securities, a redemption of a significant amount of the Company's equity securities or the Company's involvement in other significant acquisitions of the Company's equity securities (excluding the Distribution), (ii) other actions or failures to act by the Company or (iii) any of the Company's representations or undertakings referred to in the tax matters agreement being incorrect or violated. ADP will generally be required to indemnify the Company for any tax resulting from the Distribution if that tax results from (a) ADP's issuance of its equity securities, redemption of its equity securities or involvement in other acquisitions of its equity securities, (b) other actions or failures to act by ADP, or (c) any of ADP's representations or undertakings referred to in the tax matters agreement being incorrect or violated.
	As of March 31, 2015, the Company recorded a receivable from ADP of $0.9 million and a payable to ADP of $2.8 million under the tax matters agreement. There were no similar amounts receivable from ADP or payable to ADP as of June 30, 2014 as the tax matters agreement was entered into in connection with the Distribution.
	On December 19, 2014, the Tax Increase Prevention Act of 2014 was signed into law. Among the changes included in the law is a provision allowing for additional first year depreciation for assets placed into service during calendar year 2014, commonly known as "bonus depreciation." The bonus depreciation provision partially relates to pre-distribution tax periods for which ADP is entitled under the tax law and in accordance with the tax matters agreement to claim additional tax depreciation for assets associated with the Company's business. During the nine months ended March 31, 2015, the Company recorded tax expense of $4.6 million to adjust deferred taxes for the additional tax depreciation to be taken by ADP in pre-distribution tax periods.
	Valuation Allowance
	The Company had valuation allowances of $3.4 million and $7.1 million as of March 31, 2015 and June 30, 2014, respectively. Valuation allowances are recorded to reduce deferred tax assets when it is more-likely-than-not that a tax benefit will expire unutilized. At the end of each reporting period, the Company reviews the realizability of its deferred tax assets. During the first quarter of fiscal 2015, after considering all available evidence, the Company concluded it was more-likely-than-not that certain future tax benefits would be realized. Therefore, an adjustment of $2.3 million was recorded in the provision for income taxes to reduce the previously recorded valuation allowance.
	Unrecognized Income Tax Benefits
	The Company had unrecognized income tax benefits of $1.8 million and $0.2 million as of March 31, 2015 and June 30, 2014, respectively, of which $1.5 million and $0.2 million, respectively, would impact the effective tax rate if recognized. During the nine months ended March 31, 2015, the Company increased its unrecognized income tax benefits related to prior period tax positions by $0.9 million for facts that now indicate the extent to which certain tax positions are more-likely-than-not of being sustained.
	Provision for Income Taxes
	The effective tax rate for the three months ended March 31, 2015 and 2014 was 36.0% and 29.0%, respectively. The effective tax rate for the three months ended March 31, 2014 was favorably impacted by a tax benefit associated with a valuation allowance adjustment of $7.2 million.
	The effective tax rate for the nine months ended March 31, 2015 and 2014 was 38.3% and 32.4%, respectively. The effective tax rate for the nine months ended March 31, 2015 was unfavorably impacted by certain separation costs that were not tax deductible and $4.6 million of tax expense associated with the tax law change for bonus depreciation, offset by tax benefits associated with a valuation allowance adjustment and the resolution of certain tax matters. The effective tax rate for the nine months ended March 31, 2014 was favorably impacted by tax benefits associated with adjustments to the valuation allowance of $7.2 million and the Company's liability for uncertain tax matters of $3.6 million.

Commitments_and_Contingencies

Commitments and Contingencies	9 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies
	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. There can be no assurance that these matters will be resolved in a manner that is not adverse to the Company.
	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.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income ("AOCI")	9 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Accumulated Other Comprehensive Income (AOCI)	Accumulated Other Comprehensive Income ("AOCI")
	Comprehensive income is a measure of income that includes both net earnings and other comprehensive (loss) income. Other comprehensive (loss) income results from items deferred on the consolidated and combined balance sheets in stockholders' equity. The Company's other comprehensive (loss) income for the three and nine months ended March 31, 2015 and 2014 and AOCI balances as of March 31, 2015 and June 30, 2014 were comprised solely of currency translation adjustments. Other comprehensive (loss) income was $(23.2) million and $6.4 million for the three months ended March 31, 2015 and 2014, respectively, and was $(40.1) million and $30.4 million for the nine months ended March 31, 2015 and 2014, respectively. The accumulated balances reported in AOCI on the consolidated and combined balance sheets for currency translation adjustments were $45.6 million and $85.7 million as of March 31, 2015 and June 30, 2014, respectively.

Transactions_with_ADP

Transactions with ADP	9 Months Ended
	Mar. 31, 2015
Related Party Transactions [Abstract]
Transactions with ADP	Transactions with ADP
	Prior to the Distribution, the Company entered into a transition services agreement with ADP to provide for an orderly transition to being an independent company. Among the principal services to be provided by ADP to the Company are operational and administrative infrastructure-related services, such as use of the e-mail domain “adp.com,” facilities sharing, procurement support, tax, human resources administrative services and services related to back office support and software development in ADP's Indian facilities. Among the principal services to be provided by the Company to ADP are operational and administrative infrastructure-related services, such as facilities sharing and human resources administrative services. The agreement will expire and services under it will cease no later than one year following the Distribution date or sooner in the event the Company no longer requires such services.
	The Company entered into a data services agreement with ADP prior to the Distribution under which ADP will provide the Company with certain data center sharing services relating to the provision of information technology, platform support, hosting and network services. The term of the agreement will expire two years after the Distribution date.
	The Company entered into an intellectual property transfer agreement with ADP prior to the Distribution under which ADP assigned to the Company certain patents, trademarks, copyrights and other intellectual property developed or owned by ADP or certain of its subsidiaries and with respect to which the Company is the primary or exclusive user today or the anticipated primary or exclusive user in the future. The term of the agreement is perpetual after the Distribution date.
	The Company also entered into an employee matters agreement with ADP prior to the Distribution pursuant to which certain employee benefit matters will be addressed, such as the treatment of ADP options held by Company employees after the separation and the treatment of benefits for Company management employees who participate in and have accrued benefits under the ADP Supplemental Officers Retirement Plan. The agreement also, to the extent provided therein, delineates the benefit plans and programs in which the Company's employees participate following the Distribution. ADP will remain responsible for the payment of all benefits under the ADP plans.
	For the period from the date of Distribution to March 31, 2015, the Company recorded $12.9 million of expense related to the transition services agreement and $6.8 million of expense related to the data services agreement in the accompanying financial statements. As of March 31, 2015, the Company had amounts payable to ADP under the transition services and data services agreements of $8.3 million. There were no similar amounts payable to ADP as of June 30, 2014 as these agreements were entered into in connection with the Distribution.

Interim_Financial_Data_by_Segm

Interim Financial Data by Segment	9 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Interim Financial Data by Segment	Interim Financial Data by Segment
	The Company manages its business operations through strategic business units. The Company's reportable segments represent its strategic business units, or operating segments, which include: Automotive Retail North America, Automotive Retail International, and Digital Marketing. The primary components of the Other segment are corporate allocations and other expenses not recorded in the segment results, such as stock-based compensation expense, corporate costs, separation costs, interest expense, and certain unallocated expenses. Certain expenses are charged to the reportable segments at a standard rate for management reasons. Other costs are recorded based on management responsibility. Reportable segment revenues and earnings before income taxes for the three and nine months ended March 31, 2014 have been adjusted to reflect updated budgeted foreign exchange rates for the fiscal year ending June 30, 2015. This adjustment is made for management reporting purposes so that the reportable revenues and earnings before taxes for each segment are presented on a consistent basis without the impact of fluctuations in foreign currency exchange rates. This adjustment is a reconciling item to revenues and earnings before income taxes in order to eliminate the adjustment in consolidation.
	Segment results:
		Revenues
		Three Months Ended						Nine Months Ended
		March 31,						March 31,
		2015			2014			2015			2014
	Automotive Retail North America	$	347.3		$	321.5		$	1,007.00		$	948.5
	Automotive Retail International	87.6			85.2			261.7			255.2
	Digital Marketing	106.2			95.9			315.2			272.6
	Foreign Exchange	(14.7		)	(1.5		)	(23.5		)	(5.4		)
	Total	$	526.4		$	501.1		$	1,560.40		$	1,470.90
		Earnings before Income Taxes
		Three Months Ended						Nine Months Ended
		March 31,						March 31,
		2015			2014			2015			2014
	Automotive Retail North America	$	103.2		$	100.3		$	290.4		$	264.7
	Automotive Retail International	13			12.5			41.5			37
	Digital Marketing (a)	10.9			5.6			14.9			17.7
	Other (b)	(33.7		)	(17.7		)	(110.1		)	(51.6		)
	Foreign Exchange	(2.4		)	(0.2		)	(4.1		)	0.3
	Total	$	91		$	100.5		$	232.6		$	268.1
	(a) Digital Marketing includes $15.6 million of accelerated amortization during the nine months ended March 31, 2015 attributable to the Cobalt trademark.
	(b) Other includes $0.6 million and $34.6 million of separation costs for the three and nine months ended March 31, 2015, respectively. The Company did not incur any separation costs during the three and nine months ended March 31, 2014.

Subsequent_Events

Subsequent Events	9 Months Ended
	Mar. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events
	On April 2, 2015, the Company, through its majority owned subsidiary, CVR, acquired AVRS, Inc. ("AVRS"), a provider of electronic vehicle registration software in California. The acquisition was made pursuant to an agreement of merger, which contains customary representations, warranties, covenants, and indemnities by the sellers and CVR. CVR acquired all of the outstanding stock of AVRS for approximately $50.0 million, which includes contingent consideration payable upon the satisfaction of specified conditions. The acquisition was funded with cash on hand. The Company is still gathering information necessary to perform the allocation of the purchase price to the fair value of assets acquired and liabilities assumed; therefore, disclosure of this information is impracticable at this time.

Basis_of_Presentation_Summary_

Basis of Presentation - Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Mar. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Revenue Recognition	Revenue Recognition. Revenue is generated from software licenses, hosting arrangements, hardware sales and leases, support and maintenance, professional services, advertising and digital marketing, as well as certain transactional services.
	The Company recognizes software related revenue (on-site) in accordance with the provisions of ASC 985-605, “Software-Revenue Recognition,” and non-software related revenue, upfront hardware sales, and software delivered under a hosted model in accordance with ASC 605, "Revenue Recognition."
	In general, revenue is recognized when all of the following criteria have been met:
	•	persuasive evidence of an arrangement exists;
	•	delivery has occurred or services have been rendered;
	•	fees are fixed or determinable; and
	•	collection of the revenue is reasonably assured.
	The following are the Company’s major components of revenue:
	•	Bundled sales of DMS and integrated solutions. In the Automotive Retail North America and Automotive Retail International segments, the Company receives fees for product installation, monthly fees for software licenses, ongoing software support and maintenance of DMS and other integrated solutions that are either hosted by the Company or installed on-site at the client’s location. The revenues for term licenses are recognized ratably over the software license term, as vendor-specific objective evidence of the fair values of the individual elements in the sales arrangement does not exist. Revenue recognition commences at the installation dates, when client acceptance has occurred, and collectability of a determinable amount is probable. In the case of hosted applications, the client does not have the contractual right to take possession of the software and the items delivered at the outset of the contract (e.g., installation, training, etc.) do not have value to the client without the software license and ongoing support and maintenance. Any upfront fees charged in the case of hosted arrangements are recognized ratably over the expected benefit period of the arrangement, typically five years. The unrecognized portion of these revenue elements is recorded as deferred revenue.
	The Company also offers various hardware elements in connection with DMS and integrated solution sales, which in some instances are considered sales-type leases under ASC 840. Revenue related to leased hardware is recognized upon installation and a receivable is recorded based on the present value of the minimum lease payments at the beginning of the lease term.
	•	Transactional revenues. The Company receives revenues on a fee per transaction processed basis in connection with providing auto retailers interfaces with third parties to process credit reports, vehicle registrations, data updates, and Internet sales leads. Transactional revenues are recorded in accordance with ASC 605. Delivery occurs at the time the services are rendered. Transactional revenues are recorded in revenues gross of costs incurred for credit report processing, vehicle registrations, and Internet sales leads as the Company is contractually responsible for providing the service, software, and/or connectivity to the clients, and therefore, the Company is the primary obligor under ASC 605.
	•	Digital Marketing services. The Company receives revenues from the placement of advertising for clients and providing websites and related advertising and marketing services. Digital marketing revenues are recorded in accordance with ASC 605 as delivery occurs at the time the services are rendered.
Deferred Costs	Deferred Costs. Costs to deliver services are expensed to cost of revenues as incurred with the exception of specific costs directly related to transition or installation activities, including the payroll related costs for the Company's implementation and training teams, as well as commission costs for the sale. These costs are deferred and expensed proportionately over the same period that the deferred revenue is recognized as revenue. Deferred amounts are monitored regularly for impairment. Impairment losses are recorded when projected remaining undiscounted operating cash flows of the related contracts are not sufficient to recover the carrying amount of the contract assets.
Computer Software to be Sold, Leased or Otherwise Marketed	Computer Software to be Sold, Leased or Otherwise Marketed. The Company's policy provides for the capitalization of certain costs of computer software to be sold, leased, or otherwise marketed. The Company's policy provides for the capitalization of all software production costs upon reaching technological feasibility for a specific product. Technological feasibility is attained when software products have a completed working model whose consistency with the overall product design has been confirmed by testing. Costs incurred prior to the establishment of technological feasibility are expensed as incurred. The establishment of technological feasibility requires judgment by management and in many instances is only attained a short time prior to the general release of the software. Maintenance-related costs are expensed as incurred.
Fair Value of Financial Instruments	Fair Value of Financial Instruments. The Company determines the fair value of financial instruments in accordance with accounting standards pertaining to fair value measurements. Such standards define fair value and establish a framework for measuring fair value in accordance with GAAP. Cash and cash equivalents, accounts receivable, other current assets, accounts payable, and other current liabilities are reflected in the consolidated and combined balance sheets at cost, which approximates fair value due to the short-term nature of these instruments. The carrying value of the Company's term loan facility (as described in Note 5), including accrued interest, approximates fair value based on the Company's current estimated incremental borrowing rate for similar types of arrangements.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements
	In April 2015, the FASB issued ASU 2015-03, "Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs." ASU 2015-03 requires that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that liability, consistent with debt discounts. ASU 2015-03 is effective for fiscal years, and interim reporting periods within those years, beginning after December 15, 2015. The adoption of ASU 2015-03 will result in a reclassification of our deferred financing costs from other assets to long-term debt within the balance sheet.
	In June 2014, the FASB issued ASU 2014-12, "Compensation - Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period." ASU 2014-12 requires that a performance target that affects vesting and that could be achieved after the requisite service period be treated as a performance condition. ASU 2014-12 is effective for fiscal years, and interim periods within those years, beginning after December 15, 2015. The adoption of ASU 2014-12 will not have an impact on the Company's consolidated results of operations, financial condition, or cash flows.
	In May 2014, the FASB issued 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.
	Recently Adopted Accounting Pronouncements
	In November 2014, the FASB issued and the Company adopted ASU 2014-17, "Business Combinations (Topic 805): Pushdown Accounting." ASU 2014-17 provides an acquired entity with an option to apply pushdown accounting in its separate financial statements upon occurrence of an event in which an acquirer obtains control of the acquired entity. An acquired entity will have the option to elect to apply pushdown accounting in a subsequent reporting period to the acquired entity's most recent change-in-control event. In connection with the FASB's issuance of ASU 2014-17, the SEC rescinded Staff Accounting Bulletin ("SAB") Topic 5.J, "New Basis of Accounting Required in Certain Circumstances." All entities, including SEC registrants, will apply ASU 2014-17 for guidance on the use of pushdown accounting. ASU 2014-17 is effective immediately. The adoption of ASU 2014-17 did not have an impact on the Company's consolidated and combined results of operations, financial condition, or cash flows.
	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 and combined results of operations, financial condition, or cash flows.

Basis_of_Presentation_Tables

Basis of Presentation (Tables)	9 Months Ended
	Mar. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of Error Corrections and Prior Period Adjustments	The following are selected line items from the Company's combined financial statements illustrating the effect of these immaterial revisions:
	Condensed Combined Statements of Operations
		Nine Months Ended March 31, 2014
					Adjustments
		As Reported			Hardware			NCI			As Revised
	Revenues	$	1,469.30		$	1.6		$	—		$	1,470.90
	Cost of revenues	899.1			1.4			—			900.5
	Selling, general and administrative	308.3			0.3			(5.2		)	303.4
	Total expenses	1,207.40			1.7			(5.2		)	1,203.90
	Operating earnings	261.9			(0.1		)	5.2			267
	Other income, net	0.1			1.7			—			1.8
	Earnings before income taxes	261.3			1.6			5.2			268.1
	Provision for income taxes	(86.3		)	(0.6		)	—			(86.9		)
	Net earnings	175			1			5.2			181.2
	Less: net earnings attributable to noncontrolling interest	—			—			5.2			5.2
	Net earnings attributable to CDK	$	175		$	1		$	—		$	176
		Three Months Ended March 31, 2014
					Adjustments
		As Reported			Hardware			NCI			As Revised
	Revenues	$	500.5		$	0.6		$	—		$	501.1
	Earnings before income taxes	98.3			0.4			1.8			100.5
	Net earnings	69.3			0.3			1.8			71.4
	Less: net earnings attributable to noncontrolling interest	—			—			1.8			1.8
	Net earnings attributable to CDK	$	69.3		$	0.3		$	—		$	69.6
	Condensed Combined Statement of Comprehensive Income
		Nine Months Ended March 31, 2014
					Adjustments
		As Reported			Hardware			NCI			As Revised
	Net earnings	$	175		$	1		$	5.2		$	181.2
	Other comprehensive income:
	Currency translation adjustments	30.4			—			—			30.4
	Other comprehensive income	30.4			—			—			30.4
	Comprehensive income	205.4			1			5.2			211.6
	Less: comprehensive income attributable to noncontrolling interest	—			—			5.2			5.2
	Comprehensive income attributable to CDK	$	205.4		$	1		$	—		$	206.4
	Condensed Combined Balance Sheet
		30-Jun-14
					Adjustments
		As Reported			Hardware			NCI			As Revised
	Assets
	Current assets:
	Accounts receivable, net	$	299.1		$	11.6		$	—		$	310.7
	Other current assets	164.6			(0.5		)	—			164.1
	Total current assets	907.1			11.1			—			918.2
	Property, plant and equipment, net	109.9			(27.3		)	—			82.6
	Other assets	205.5			27.6			—			233.1
	Total assets	$	2,587.20		$	11.4		—			$	2,598.60
	Liabilities and Equity
	Current liabilities:
	Accrued expenses and other current liabilities	$	154.2		$	3.8		$	—		$	158
	Total current liabilities	493.7			3.8			—			497.5
	Deferred income taxes	76.6			(0.1		)	—			76.5
	Other liabilities	43.9			—			(11.4		)	32.5
	Total liabilities	797			3.7			(11.4		)	789.3
	Equity:
	Net parent company investment	1,704.60			7.6			—			1,712.20
	Accumulated other comprehensive income	85.6			0.1			—			85.7
	Total CDK stockholders' equity	1,790.20			7.7			—			1,797.90
	Noncontrolling interest	—			—			11.4			11.4
	Total equity	1,790.20			7.7			11.4			1,809.30
	Total liabilities and equity	$	2,587.20		$	11.4		$	—		$	2,598.60
	Condensed Combined Statement of Cash Flows
		Nine Months Ended March 31, 2014
					Adjustments
	As Reported			Hardware			NCI			As Revised
Cash Flows from Operating Activities:
Net earnings	$	175		$	1		$	5.2		$	181.2
Adjustments to reconcile net earnings to cash flows provided by operating activities:
Depreciation and amortization	51.2			(11.6		)	—			39.6
Deferred income taxes	(14.7		)	0.6			—			(14.1		)
Other	(0.7		)	(1.2		)	(5.2		)	(7.1		)
Changes in operating assets and liabilities, net of effects from acquisitions and divestitures of businesses:
Increase in accounts receivable	(34.9		)	(1.1		)	—			(36.0		)
Increase in other assets	(9.5		)	(2.2		)	—			(11.7		)
(Decrease)/increase in accrued expenses and other liabilities	(32.8		)	0.1			8			(24.7		)
Net cash flows provided by/(used in) operating activities	149			(14.4		)	8			142.6
Cash Flows from Investing Activities:
Capital expenditures	(44.8		)	14.4			—			(30.4		)
Net cash flows (used in)/provided by investing activities	(77.6		)	14.4			—			(63.2		)
Cash Flows from Financing Activities:
Dividend payments of CVR to minority owners	—			—			(8.0		)	(8.0		)
Net cash flows provided by/(used in) financing activities	18.2			—			(8.0		)	10.2
Combined Statement of Equity
	30-Jun-14
				Adjustments
	As Reported			Hardware			NCI			As Revised
Net Parent Company Investment
Balance as of June 30, 2014	$	1,704.60		$	7.6		$	—		1,712.20
Accumulated Other Comprehensive Income
Balance as of June 30, 2014	85.6			0.1			—			85.7
Total CDK Stockholders' Equity
Balance as of June 30, 2014	1,790.20			7.7			—			1,797.90
Noncontrolling Interest
Balance as of June 30, 2014	—			—			11.4			11.4
Total Equity
Balance as of June 30, 2014	$	1,790.20		7.7			$	11.4		$	1,809.30

Earnings_per_Share_Tables

Earnings per Share (Tables)	9 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Schedule of Earnings Per Share, Basic and Diluted	The following table summarizes the components of basic and diluted earnings per share:
		Three Months Ended				Nine Months Ended
		March 31,				March 31,
		2015		2014		2015		2014
	Net earnings attributable to CDK	$	56.3	$	69.6	$	137.7	$	176
	Weighted-average shares outstanding:
	Basic	160.6		160.6		160.7		160.6
	Effect of employee stock options	0.7		—		0.4		—
	Effect of employee restricted stock	0.6		—		0.4		—
	Diluted	161.9		160.6		161.5		160.6
	Basic earnings attributable to CDK per share	$	0.35	$	0.43	$	0.86	$	1.1
	Diluted earnings attributable to CDK per share	$	0.35	$	0.43	$	0.85	$	1.1

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets, Net (Tables)	9 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in Goodwill	Changes in goodwill for the nine months ended March 31, 2015 were as follows:
		Automotive Retail North America			Automotive Retail International			Digital Marketing		Total
	Balance as of June 30, 2014	$	400.1		$	454.7		$	376.1	$	1,230.90
	Currency translation adjustments	(3.4		)	(58.4		)	—		(61.8		)
	Balance as of March 31, 2015	$	396.7		$	396.3		$	376.1	$	1,169.10
Components of Intangible Assets, Net	Components of intangible assets, net were as follows:
		March 31,								June 30,
		2015								2014
		Original Cost			Accumulated Amortization			Intangible Assets, net		Original Cost			Accumulated Amortization			Intangible Assets, net
	Software	$	110.3		$	(94.0	)	$	16.3	$	103.9		$	(87.4	)	$	16.5
	Client lists	215			(131.4		)	83.6		222.1			(124.5		)	97.6
	Trademarks	27			(23.8		)	3.2		27.1			(7.4		)	19.7
	Other intangibles	2.4			(2.4		)	—		6			(6.0		)	—
		$	354.7		$	(251.6	)	$	103.1	$	359.1		$	(225.3	)	$	133.8
Estimated Amortization Expenses of the Company's Existing Intangible Assets	Estimated amortization expenses of the Company's existing intangible assets as of March 31, 2015 were as follows:
		Amount
	Three months ending June 30, 2015	$	7.2
	Twelve months ending June 30, 2016	24.4
	Twelve months ending June 30, 2017	18.6
	Twelve months ending June 30, 2018	15.2
	Twelve months ending June 30, 2019	9
	Twelve months ending June 30, 2020	7.8
	Thereafter	20.9
		$	103.1

Debt_Tables

Debt (Tables)	9 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Schedule of Debt	Debt comprised of the following as of March 31, 2015 and June 30, 2014:
		March 31, 2015		June 30, 2014
	Revolving credit facility	$	—	$	—
	Term loan facility	243.8		—
	3.30% senior notes, due 2019	250		—
	4.50% senior notes, due 2024	500		—
	Total debt	993.8		—
	Current maturities of long-term debt	12.5		—
	Total long-term debt	$	981.3	$	—
Aggregate Scheduled Maturities of Long-term Debt	The Company's aggregate scheduled maturities of the long-term debt as of March 31, 2015 were as follows:
		Amount
	Twelve months ended March 31, 2016	$	12.5
	Twelve months ended March 31, 2017	12.5
	Twelve months ended March 31, 2018	12.5
	Twelve months ended March 31, 2019	12.5
	Twelve months ended March 31, 2020	443.8
	Thereafter	500
		$	993.8

Stock_Based_Compensation_Table

Stock Based Compensation (Tables)	9 Months Ended
	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-based Compensation Expense and Related Income Tax Benefits	The following table represents stock-based compensation expense and related income tax benefits for the three and nine months ended March 31, 2015 and 2014, respectively:
		Three Months Ended						Nine Months Ended
		March 31,						March 31,
		2015				2014		2015		2014
	Cost of revenues	$	2			$	1.7	$	5.8	$	4.9
	Selling, general and administrative expenses	6.6				3.5		16.2		10.1
	Total pretax stock-based compensation expense	$	8.6			$	5.2	$	22	$	15
	Income tax benefit	$	2.9			$	1.9	$	7.8	$	5.5
Activity Related to the Company's Incentive Equity Awards From the Date of Distribution	The activity related to the Company's incentive equity awards from the date of Distribution to March 31, 2015 consisted of the following:
	Stock Options
		Number			Weighted
		of Options			Average Exercise Price
		(in thousands)			(in dollars)
	Options outstanding as of June 30, 2014	—			$	—
	Options converted from ADP equity awards	2,269			$	19.64
	Options granted	397			$	41.71
	Options exercised	(444	)		$	15.95
	Options canceled	(18	)		$	23.23
	Options outstanding as of March 31, 2015	2,204			$	24.32
	Time-Based Restricted Stock and Time-Based Restricted Stock Units
		Number of Shares			Number of Units
		(in thousands)			(in thousands)
	Non-vested restricted shares/units as of June 30, 2014	—			—
	Restricted shares/units converted from ADP equity awards	576			127
	Restricted shares/units granted	513			180
	Restricted shares/units vested	(52	)		(7	)
	Restricted shares/units forfeited	(32	)		(12	)
	Non-vested restricted shares/units as of March 31, 2015	1,005			288
	Performance-Based Restricted Stock and Performance-Based Restricted Stock Units
		Number of Shares			Number of Units
		(in thousands)			(in thousands)
	Non-vested restricted shares/units as of June 30, 2014	—			—
	Restricted shares/units converted from ADP equity awards	70			89
	Restricted shares/units granted	—			132
	Restricted shares/units vested	—			—
	Restricted shares/units forfeited	—			—
	Non-vested restricted shares/units as of March 31, 2015	70			221
Assumptions Used To Estimate Fair Value For Stock Options Granted	The following table presents the assumptions used to determine the fair value of the outstanding ADP awards converted into equity awards of CDK to measure the incremental compensation cost:
	Risk-free interest rate	1.1		%
	Dividend yield	1.1		%
	Weighted average volatility factor	23.9		%
	Weighted average expected life (in years)	3.4
	Weighted average fair value (in dollars)	$	12.5
	The following table presents the assumptions used to determine the fair value of the stock options granted after the date of Distribution through March 31, 2015:
	Risk-free interest rate	1.6		%
	Dividend yield	1.1		%
	Weighted average volatility factor	25.6		%
	Weighted average expected life (in years)	6.3
	Weighted average fair value (in dollars)	$	10.24

Interim_Financial_Data_by_Segm1

Interim Financial Data by Segment (Tables)	9 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Schedule of Revenue and Earnings Before Taxes, by Segment	Segment results:
		Revenues
		Three Months Ended						Nine Months Ended
		March 31,						March 31,
		2015			2014			2015			2014
	Automotive Retail North America	$	347.3		$	321.5		$	1,007.00		$	948.5
	Automotive Retail International	87.6			85.2			261.7			255.2
	Digital Marketing	106.2			95.9			315.2			272.6
	Foreign Exchange	(14.7		)	(1.5		)	(23.5		)	(5.4		)
	Total	$	526.4		$	501.1		$	1,560.40		$	1,470.90
		Earnings before Income Taxes
		Three Months Ended						Nine Months Ended
		March 31,						March 31,
		2015			2014			2015			2014
	Automotive Retail North America	$	103.2		$	100.3		$	290.4		$	264.7
	Automotive Retail International	13			12.5			41.5			37
	Digital Marketing (a)	10.9			5.6			14.9			17.7
	Other (b)	(33.7		)	(17.7		)	(110.1		)	(51.6		)
	Foreign Exchange	(2.4		)	(0.2		)	(4.1		)	0.3
	Total	$	91		$	100.5		$	232.6		$	268.1
	(a) Digital Marketing includes $15.6 million of accelerated amortization during the nine months ended March 31, 2015 attributable to the Cobalt trademark.
	(b) Other includes $0.6 million and $34.6 million of separation costs for the three and nine months ended March 31, 2015, respectively. The Company did not incur any separation costs during the three and nine months ended March 31, 2014.

Basis_of_Presentation_Details

Basis of Presentation (Details) (USD $)	3 Months Ended		9 Months Ended		0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Sep. 30, 2014	Jun. 30, 2014
Class of Stock [Line Items]
Separation costs	$600,000	$0	$34,600,000	$0
Notes receivable from ADP and its affiliates	0		0			40,600,000
Notes payable to ADP and its affiliates	0		0			21,900,000
Current deferred costs	116,400,000		116,400,000			120,300,000
Long-term deferred costs	162,200,000		162,200,000			166,800,000
Software, costs incurred prior to the establishment of technological feasibility	43,300,000	41,500,000	127,200,000	123,400,000
Long-term debt	993,800,000		993,800,000			0
Senior Notes
Class of Stock [Line Items]
Long-term debt	750,000,000		750,000,000
Fair Value, Inputs, Level 2 | Senior Notes
Class of Stock [Line Items]
Approximate aggregate fair value of senior notes	764,400,000		764,400,000
Software Service, Support and Maintenance Arrangement
Class of Stock [Line Items]
Recognition period for upfront charges related to software licenses, support and maintenance			5 years
ADP
Class of Stock [Line Items]
Royalty fees		5,600,000	5,700,000	16,300,000
Cost of services received from affiliated companies		5,200,000	5,500,000	14,200,000
Notes receivable from ADP and its affiliates	0		0			40,600,000
Notes payable to ADP and its affiliates	0		0			21,900,000
Interest income on notes receivable from affiliated parties		200,000	200,000	600,000
Interest expense on notes payable with affiliated parties		300,000	200,000	700,000
Overhead Expense
Class of Stock [Line Items]
Allocated expenses from services provided by ADP		7,400,000	7,100,000	21,900,000
Payroll Processing
Class of Stock [Line Items]
Allocated expenses from services provided by ADP		$300,000	$400,000	$900,000
Common Stock
Class of Stock [Line Items]
Shares of CDK distributed to ADP shareholders of record, common stock, in percentage					100.00%

Basis_of_Presentation_Revision

Basis of Presentation - Revision of Financial Statements (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Jun. 30, 2014
Condensed Combined Statements of Operations
Revenues	$526.40	$501.10	$1,560.40	$1,470.90
Cost of revenues	321.8	304.9	956.6	900.5
Selling, general and administrative expenses	105.5	96.1	321.9	303.4
Total expenses	427.9	401	1,313.10	1,203.90
Operating earnings	98.5	100.1	247.3	267
Other income, net	1.8	0.6	4.7	1.8
Earnings before income taxes	91	100.5	232.6	268.1
Provision for income taxes	-32.8	-29.1	-89	-86.9
Net earnings	58.2	71.4	143.6	181.2
Less: net earnings attributable to noncontrolling interest	1.9	1.8	5.9	5.2
Net earnings attributable to CDK	56.3	69.6	137.7	176
Condensed Combined Statement of Comprehensive Income
Currency translation adjustments			-40.1	30.4
Other comprehensive income	-23.2	6.4	-40.1	30.4
Comprehensive income	35	77.8	103.5	211.6
Less: comprehensive income attributable to noncontrolling interest				5.2
Comprehensive income attributable to CDK	33.1	76	97.6	206.4
Current assets:
Accounts receivable, net	352.8		352.8		310.7
Other current assets	185.1		185.1		164.1
Total current assets	906.4		906.4		918.2
Property, plant and equipment, net	85.3		85.3		82.6
Other assets	245.4		245.4		233.1
Assets	2,509.30		2,509.30		2,598.60
Current liabilities:
Accrued expenses and other current liabilities	161.5		161.5		158
Total current liabilities	475.7		475.7		497.5
Deferred income taxes	73.3		73.3		76.5
Other liabilities	35.6		35.6		32.5
Total liabilities	1,745.30		1,745.30		789.3
Equity:
Net parent company investment	0		0		1,712.20
Accumulated other comprehensive income	45.6		45.6		85.7
Total CDK stockholders' equity	752.1		752.1		1,797.90
Noncontrolling interest	11.9		11.9		11.4
Total equity	764		764		1,809.30
Total liabilities and equity	2,509.30		2,509.30		2,598.60
Adjustments to reconcile net earnings to cash flows provided by operating activities:
Depreciation and amortization			57.1	39.6
Deferred income taxes			-2	-14.1
Other			-5.9	-7.1
Changes in operating assets and liabilities, net of effects from acquisitions and divestitures of businesses:
Increase in accounts receivable			-55.6	-36
Increase in other assets			-19.1	-11.7
(Decrease)/increase in accrued expenses and other liabilities			14.6	-24.7
Net cash flows provided by/(used in) operating activities			160.2	142.6
Cash Flows from Investing Activities:
Capital expenditures				-30.4
Net cash flows (used in)/provided by investing activities			-7.8	-63.2
Cash Flows from Financing Activities:
Dividend payments of CVR to noncontrolling owners			-5.4	-8
Net cash flows provided by/(used in) financing activities			-163.8	10.2
Combined Statement of Equity
Total equity	764		764		1,809.30
Net Parent Company Investment
Condensed Combined Statements of Operations
Net earnings			39
Equity:
Total equity	0		0		1,712.20
Combined Statement of Equity
Total equity	0		0		1,712.20
Accumulated Other Comprehensive Income
Condensed Combined Statement of Comprehensive Income
Currency translation adjustments			-40.1
Equity:
Total equity	45.6		45.6		85.7
Combined Statement of Equity
Total equity	45.6		45.6		85.7
Total CDK Stockholders' Equity
Equity:
Total equity					1,797.90
Combined Statement of Equity
Total equity					1,797.90
Noncontrolling Interest
Condensed Combined Statements of Operations
Net earnings			5.9
Equity:
Total equity	11.9		11.9		11.4
Combined Statement of Equity
Total equity	11.9		11.9		11.4
As Reported
Condensed Combined Statements of Operations
Revenues		500.5		1,469.30
Cost of revenues				899.1
Selling, general and administrative expenses				308.3
Total expenses				1,207.40
Operating earnings				261.9
Other income, net				0.1
Earnings before income taxes		98.3		261.3
Provision for income taxes				-86.3
Net earnings		69.3		175
Less: net earnings attributable to noncontrolling interest		0		0
Net earnings attributable to CDK		69.3		175
Condensed Combined Statement of Comprehensive Income
Currency translation adjustments				30.4
Other comprehensive income				30.4
Comprehensive income				205.4
Less: comprehensive income attributable to noncontrolling interest				0
Comprehensive income attributable to CDK				205.4
Current assets:
Accounts receivable, net					299.1
Other current assets					164.6
Total current assets					907.1
Property, plant and equipment, net					109.9
Other assets					205.5
Assets					2,587.20
Current liabilities:
Accrued expenses and other current liabilities					154.2
Total current liabilities					493.7
Deferred income taxes					76.6
Other liabilities					43.9
Total liabilities					797
Equity:
Net parent company investment					1,704.60
Accumulated other comprehensive income					85.6
Total CDK stockholders' equity					1,790.20
Noncontrolling interest					0
Total equity					1,790.20
Total liabilities and equity					2,587.20
Adjustments to reconcile net earnings to cash flows provided by operating activities:
Depreciation and amortization				51.2
Deferred income taxes				-14.7
Other				-0.7
Changes in operating assets and liabilities, net of effects from acquisitions and divestitures of businesses:
Increase in accounts receivable				-34.9
Increase in other assets				-9.5
(Decrease)/increase in accrued expenses and other liabilities				-32.8
Net cash flows provided by/(used in) operating activities				149
Cash Flows from Investing Activities:
Capital expenditures				-44.8
Net cash flows (used in)/provided by investing activities				-77.6
Cash Flows from Financing Activities:
Dividend payments of CVR to noncontrolling owners				0
Net cash flows provided by/(used in) financing activities				18.2
Combined Statement of Equity
Total equity					1,790.20
As Reported | Net Parent Company Investment
Equity:
Total equity					1,704.60
Combined Statement of Equity
Total equity					1,704.60
As Reported | Accumulated Other Comprehensive Income
Equity:
Total equity					85.6
Combined Statement of Equity
Total equity					85.6
As Reported | Total CDK Stockholders' Equity
Equity:
Total equity					1,790.20
Combined Statement of Equity
Total equity					1,790.20
As Reported | Noncontrolling Interest
Equity:
Total equity					0
Combined Statement of Equity
Total equity					0
Hardware | Adjustments
Condensed Combined Statements of Operations
Revenues		0.6		1.6
Cost of revenues				1.4
Selling, general and administrative expenses				0.3
Total expenses				1.7
Operating earnings				-0.1
Other income, net				1.7
Earnings before income taxes		0.4		1.6
Provision for income taxes				-0.6
Net earnings		0.3		1
Less: net earnings attributable to noncontrolling interest		0		0
Net earnings attributable to CDK		0.3		1
Condensed Combined Statement of Comprehensive Income
Currency translation adjustments				0
Other comprehensive income				0
Comprehensive income				1
Less: comprehensive income attributable to noncontrolling interest				0
Comprehensive income attributable to CDK				1
Current assets:
Accounts receivable, net					11.6
Other current assets					-0.5
Total current assets					11.1
Property, plant and equipment, net					-27.3
Other assets					27.6
Assets					11.4
Current liabilities:
Accrued expenses and other current liabilities					3.8
Total current liabilities					3.8
Deferred income taxes					-0.1
Other liabilities					0
Total liabilities					3.7
Equity:
Net parent company investment					7.6
Accumulated other comprehensive income					0.1
Total CDK stockholders' equity					7.7
Noncontrolling interest					0
Total equity					7.7
Total liabilities and equity					11.4
Adjustments to reconcile net earnings to cash flows provided by operating activities:
Depreciation and amortization				-11.6
Deferred income taxes				0.6
Other				-1.2
Changes in operating assets and liabilities, net of effects from acquisitions and divestitures of businesses:
Increase in accounts receivable				-1.1
Increase in other assets				-2.2
(Decrease)/increase in accrued expenses and other liabilities				0.1
Net cash flows provided by/(used in) operating activities				-14.4
Cash Flows from Investing Activities:
Capital expenditures				14.4
Net cash flows (used in)/provided by investing activities				14.4
Cash Flows from Financing Activities:
Dividend payments of CVR to noncontrolling owners				0
Net cash flows provided by/(used in) financing activities				0
Combined Statement of Equity
Total equity					7.7
Hardware | Adjustments | Net Parent Company Investment
Equity:
Total equity					7.6
Combined Statement of Equity
Total equity					7.6
Hardware | Adjustments | Accumulated Other Comprehensive Income
Equity:
Total equity					0.1
Combined Statement of Equity
Total equity					0.1
Hardware | Adjustments | Total CDK Stockholders' Equity
Equity:
Total equity					7.7
Combined Statement of Equity
Total equity					7.7
Hardware | Adjustments | Noncontrolling Interest
Equity:
Total equity					0
Combined Statement of Equity
Total equity					0
NCI | Adjustments
Condensed Combined Statements of Operations
Revenues		0		0
Cost of revenues				0
Selling, general and administrative expenses				-5.2
Total expenses				-5.2
Operating earnings				5.2
Other income, net				0
Earnings before income taxes		1.8		5.2
Provision for income taxes				0
Net earnings		1.8		5.2
Less: net earnings attributable to noncontrolling interest		1.8		5.2
Net earnings attributable to CDK		0		0
Condensed Combined Statement of Comprehensive Income
Currency translation adjustments				0
Other comprehensive income				0
Comprehensive income				5.2
Less: comprehensive income attributable to noncontrolling interest				5.2
Comprehensive income attributable to CDK				0
Current assets:
Accounts receivable, net					0
Other current assets					0
Total current assets					0
Property, plant and equipment, net					0
Other assets					0
Assets					0
Current liabilities:
Accrued expenses and other current liabilities					0
Total current liabilities					0
Deferred income taxes					0
Other liabilities					-11.4
Total liabilities					-11.4
Equity:
Net parent company investment					0
Accumulated other comprehensive income					0
Total CDK stockholders' equity					0
Noncontrolling interest					11.4
Total equity					11.4
Total liabilities and equity					0
Adjustments to reconcile net earnings to cash flows provided by operating activities:
Depreciation and amortization				0
Deferred income taxes				0
Other				-5.2
Changes in operating assets and liabilities, net of effects from acquisitions and divestitures of businesses:
Increase in accounts receivable				0
Increase in other assets				0
(Decrease)/increase in accrued expenses and other liabilities				8
Net cash flows provided by/(used in) operating activities				8
Cash Flows from Investing Activities:
Capital expenditures				0
Net cash flows (used in)/provided by investing activities				0
Cash Flows from Financing Activities:
Dividend payments of CVR to noncontrolling owners				-8
Net cash flows provided by/(used in) financing activities				-8
Combined Statement of Equity
Total equity					11.4
NCI | Adjustments | Net Parent Company Investment
Equity:
Total equity					0
Combined Statement of Equity
Total equity					0
NCI | Adjustments | Accumulated Other Comprehensive Income
Equity:
Total equity					0
Combined Statement of Equity
Total equity					0
NCI | Adjustments | Total CDK Stockholders' Equity
Equity:
Total equity					0
Combined Statement of Equity
Total equity					0
NCI | Adjustments | Noncontrolling Interest
Equity:
Total equity					11.4
Combined Statement of Equity
Total equity					$11.40

Earnings_per_Share_Components_

Earnings per Share - Components of Basic and Diluted Earnings Per Share (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Weighted-average shares outstanding:
Net earnings attributable to CDK	$56.30	$69.60	$137.70	$176
Basic (shares)	160.6	160.6	160.7	160.6
Effect of employee stock options (shares)	0.7	0	0.4	0
Effect of employee restricted stock (shares)	0.6	0	0.4	0
Diluted (shares)	161.9	160.6	161.5	160.6
Basic earnings per share (usd per share)	$0.35	$0.43	$0.86	$1.10
Diluted earnings per share (usd per share)	$0.35	$0.43	$0.85	$1.10

Earnings_per_Share_Narrative_D

Earnings per Share - Narrative (Details)	3 Months Ended	9 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2015	Sep. 30, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Number of ADP shares for every share of CDK			3
Employee Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Stock options excluded from calculation of diluted earnings per share	0.3	0.3

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets, Net - Changes In Goodwill (Details) (USD $)	9 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015
Changes in Goodwill
Balance as of June 30, 2014	$1,230.90
Currency translation adjustments	-61.8
Balance as of March 31, 2015	1,169.10
Automotive Retail North America
Changes in Goodwill
Balance as of June 30, 2014	400.1
Currency translation adjustments	-3.4
Balance as of March 31, 2015	396.7
Automotive Retail International
Changes in Goodwill
Balance as of June 30, 2014	454.7
Currency translation adjustments	-58.4
Balance as of March 31, 2015	396.3
Digital Marketing
Changes in Goodwill
Balance as of June 30, 2014	376.1
Currency translation adjustments	0
Balance as of March 31, 2015	$376.10

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets, Net - Components Of Intangible Assets (Details) (USD $)	Mar. 31, 2015	Jun. 30, 2014
In Millions, unless otherwise specified
Finite-Lived Intangible Assets [Line Items]
Original Cost	$354.70	$359.10
Accumulated Amortization	-251.6	-225.3
Intangible Assets, net	103.1	133.8
Software
Finite-Lived Intangible Assets [Line Items]
Original Cost	110.3	103.9
Accumulated Amortization	-94	-87.4
Intangible Assets, net	16.3	16.5
Client lists
Finite-Lived Intangible Assets [Line Items]
Original Cost	215	222.1
Accumulated Amortization	-131.4	-124.5
Intangible Assets, net	83.6	97.6
Trademarks
Finite-Lived Intangible Assets [Line Items]
Original Cost	27	27.1
Accumulated Amortization	-23.8	-7.4
Intangible Assets, net	3.2	19.7
Other intangibles
Finite-Lived Intangible Assets [Line Items]
Original Cost	2.4	6
Accumulated Amortization	-2.4	-6
Intangible Assets, net	$0	$0

Goodwill_and_Intangible_Assets4

Goodwill and Intangible Assets, Net - Narrative (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles	$7	$7.10	$37.50	$21.50
Trademarks
Finite-Lived Intangible Assets [Line Items]
Amortization of intangibles			$15.60
Effect of change in estimated useful life of trademark on earnings per share, basic, net of tax (usd per share)			$0.06
Effect of change in estimated useful life of trademark on earnings per share, diluted, net of tax (usd per share)			$0.06
Weighted average remaining useful life			10 years
Other intangibles
Finite-Lived Intangible Assets [Line Items]
Weighted average remaining useful life			6 years
Software
Finite-Lived Intangible Assets [Line Items]
Weighted average remaining useful life			3 years
Client lists
Finite-Lived Intangible Assets [Line Items]
Weighted average remaining useful life			7 years

Goodwill_and_Intangible_Assets5

Goodwill and Intangible Assets, Net - Schedule Of Finite-Lived Intangible Assets, Future Amortization Expense (Details) (USD $)	Mar. 31, 2015	Jun. 30, 2014
In Millions, unless otherwise specified
Goodwill and Intangible Assets Disclosure [Abstract]
Three months ending June 30, 2015	$7.20
Twelve months ending June 30, 2016	24.4
Twelve months ending June 30, 2017	18.6
Twelve months ending June 30, 2018	15.2
Twelve months ending June 30, 2019	9
Twelve months ending June 30, 2020	7.8
Thereafter	20.9
Intangible Assets, net	$103.10	$133.80

Debt_Schedule_of_Debt_Details

Debt - Schedule of Debt (Details) (USD $)	Mar. 31, 2015	Jun. 30, 2014
In Millions, unless otherwise specified
Debt Instrument [Line Items]
Long-term debt	$993.80	$0
Current maturities of long-term debt	12.5	0
Total long-term debt	981.3	0
Revolving credit facility | Revolving credit facility
Debt Instrument [Line Items]
Long-term debt	0	0
Term loan facility
Debt Instrument [Line Items]
Long-term debt	243.8	0
Senior Notes
Debt Instrument [Line Items]
Long-term debt	750
Senior Notes | 3.30% senior notes, due 2019
Debt Instrument [Line Items]
Long-term debt	250	0
Senior Notes | 4.50% senior notes, due 2024
Debt Instrument [Line Items]
Long-term debt	$500	$0

Debt_Narrative_Details

Debt - Narrative (Details) (USD $)	0 Months Ended		9 Months Ended		0 Months Ended
	Sep. 30, 2014	Sep. 16, 2014	Mar. 31, 2015	Mar. 31, 2014	Oct. 14, 2014	Jun. 30, 2014
Debt Instrument [Line Items]
Cash dividends paid to ADP at separation	$825,000,000		$825,000,000	$0
Long-term debt			993,800,000			0
Maximum ratio of indebtedness to EBITDA		3.5
Minimum ratio of EBITDA to Interest expense		3
Revolving credit facility
Debt Instrument [Line Items]
Debt instrument, term		5 years
Revolving credit facility | Revolving credit facility
Debt Instrument [Line Items]
Revolving credit facility, maximum borrowing capacity		300,000,000
Revolving credit facility, Euro or Sterling sublimit		100,000,000
Line of credit facility accordion feature		100,000,000
Line of credit, number of one-year extensions		2
Revolving credit facility term extension period		1 year
Long-term debt			0			0
Revolving credit facility | Revolving credit facility | Prime Rate | JP Morgan Chase Bank
Debt Instrument [Line Items]
Description of variable rate basis, line of credit		prime rate
Revolving credit facility | Revolving credit facility | Federal Funds Rate
Debt Instrument [Line Items]
Basis spread on variable rate, line of credit		0.50%
Description of variable rate basis, line of credit		federal funds rate
Revolving credit facility | Revolving credit facility | One-Month LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate, line of credit		1.00%
Revolving credit facility | Revolving credit facility | Minimum
Debt Instrument [Line Items]
Commitment fee percentage on unused portion of the revolving credit facility		0.13%
Revolving credit facility | Revolving credit facility | Minimum | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate, line of credit		1.13%
Revolving credit facility | Revolving credit facility | Minimum | One-Month LIBOR
Debt Instrument [Line Items]
Additional basis spread on variable rate, line of credit		0.13%
Revolving credit facility | Revolving credit facility | Maximum
Debt Instrument [Line Items]
Commitment fee percentage on unused portion of the revolving credit facility		0.35%
Revolving credit facility | Revolving credit facility | Maximum | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Basis spread on variable rate, line of credit		2.00%
Revolving credit facility | Revolving credit facility | Maximum | One-Month LIBOR
Debt Instrument [Line Items]
Additional basis spread on variable rate, line of credit		1.00%
Term loan facility
Debt Instrument [Line Items]
Debt instrument, term		5 years
Loan, face amount		250,000,000
Long-term debt			243,800,000			0
Periodic payment of principal, in percentage, term loan		1.25%
Annual interest rate on loan facility			1.68%
Bridge Loan
Debt Instrument [Line Items]
Loan, face amount		750,000,000
Senior Notes
Debt Instrument [Line Items]
Long-term debt			750,000,000
Interest rate increase for the first 90 days after October 14, 2015					0.25%
Interest rate increase after 90 days and thereafter					0.25%
Maximum potential consideration under registration payment arrangement			27,400,000
Senior Notes | 3.30% senior notes, due 2019
Debt Instrument [Line Items]
Loan, face amount					250,000,000
Interest rate					3.30%
Long-term debt			250,000,000			0
Senior Notes | 4.50% senior notes, due 2024
Debt Instrument [Line Items]
Loan, face amount					500,000,000
Interest rate					4.50%
Long-term debt			500,000,000			0
Senior Notes | Minimum
Debt Instrument [Line Items]
Redemption price, percentage, subject to change of control provision and decline in rating					101.00%
Senior Notes | Debt Instrument, Redemption, Period One | Minimum
Debt Instrument [Line Items]
Redemption price, percentage					100.00%
Senior Notes | Debt Instrument, Redemption, Period Two | Minimum
Debt Instrument [Line Items]
Redemption price, percentage					100.00%
Revolving Line of Credit and Medium-Term Notes | Maximum
Debt Instrument [Line Items]
Maximum aggregate principal amount of accelerated maturity of other indebtedness allowed		75,000,000

Debt_Schedule_of_Maturities_De

Debt - Schedule of Maturities (Details) (USD $)	Mar. 31, 2015	Jun. 30, 2014
In Millions, unless otherwise specified
Debt Disclosure [Abstract]
Twelve months ended March 31, 2016	$12.50
Twelve months ended March 31, 2017	12.5
Twelve months ended March 31, 2018	12.5
Twelve months ended March 31, 2019	12.5
Twelve months ended March 31, 2020	443.8
Thereafter	500
Long-term debt	$993.80	$0

Stock_Based_Compensation_Narra

Stock Based Compensation - Narrative (Details) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended	0 Months Ended	6 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Sep. 30, 2014	Oct. 01, 2014	Mar. 31, 2015
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$8.60	$5.20	$22	$15
Equity Classified Awards Expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense			12.4
Liability Classified Awards Expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense			4.2
Expense Allocated from ADP
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense					5.4
Spinoff
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Conversion of existing equity awards to new awards, ratio						2.757
Converted equity awards, change in fair value						1.4
Increase in fair value of converted awards, recognized in period							1
Total remaining unrecognized compensation cost	0.4		0.4				0.4
Employee Stock Option
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Converted equity awards, stock options issued (shares)			397,000
Converted equity awards, weighted average exercise price (usd per share)			$15.95
Total remaining unrecognized compensation cost	5.3		5.3				5.3
Award expiration term			10 years
Weighted-average remaining requisite vesting period			2 years
Employee Stock Option | Spinoff
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Converted equity awards, stock options issued (shares)						2,300,000
Converted equity awards, weighted average exercise price (usd per share)						$19.64
Stock Compensation Plan | 2014 Omnibus Award Plan
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Number of shares authorized	12,000,000		12,000,000				12,000,000
Award expiration term			10 years
Time-Based Restricted Stock and Time-Based Restricted Stock Units | Minimum
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Award vesting period			2 years
Time-Based Restricted Stock and Time-Based Restricted Stock Units | Maximum
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Award vesting period			5 years
Performance-Based Restricted Stock and Performance-Based Restricted Stock Units
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Award performance period			1 year
Performance-Based Restricted Stock and Performance-Based Restricted Stock Units | Minimum
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Award vesting period			1 year
Award vesting based on performance period and targets, percentage			0.00%
Performance-Based Restricted Stock and Performance-Based Restricted Stock Units | Maximum
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Award vesting period			3 years
Award requisite service period			26 months
Award vesting based on performance period and targets, percentage			150.00%
Restricted Stock Units
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total remaining unrecognized compensation cost	14.4		14.4				14.4
Weighted-average remaining requisite vesting period			1 year 10 months 24 days
Restricted Stock
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total remaining unrecognized compensation cost	$15.30		$15.30				$15.30
Weighted-average remaining requisite vesting period			1 year 6 months
Time-Based Restricted Stock | Spinoff
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Converted equity awards, stock options issued (shares)						700,000
Performance-Based Restricted Stock | Spinoff
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Converted equity awards, stock options issued (shares)						200,000

Stock_Based_Compensation_Compo

Stock Based Compensation - Components Of Stock-Based Compensation Expense (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Pre-tax stock-based compensation expense	$8.60	$5.20	$22	$15
Income tax benefit	2.9	1.9	7.8	5.5
Cost of revenues
Defined Benefit Plan Disclosure [Line Items]
Pre-tax stock-based compensation expense	2	1.7	5.8	4.9
Selling, general and administrative expenses
Defined Benefit Plan Disclosure [Line Items]
Pre-tax stock-based compensation expense	$6.60	$3.50	$16.20	$10.10

Stock_Based_Compensation_Activ

Stock Based Compensation - Activity Related to the Company's Incentive Equity Awards (Details) (USD $)	9 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015
Employee Stock Option
Number of Options (in shares)
Options outstanding as of June 30, 2014	0
Options converted from ADP equity awards	2,269
Options granted	397
Options exercised	-444
Options canceled	-18
Options outstanding as of March 31, 2015	2,204
Weighted Average Exercise Price (in usd per share)
Options outstanding as of June 30, 2014	$0
Options converted from ADP equity awards	$19.64
Options granted	$41.71
Options exercised	$15.95
Options canceled	$23.23
Options outstanding as of March 31, 2015	$24.32
Time-Based Restricted Stock
Restricted Stock and Restricted Stock Units (in shares)
Non-vested restricted shares/units as of June 30, 2014	0
Restricted shares/units converted from ADP equity awards	576
Restricted shares/units granted	513
Restricted shares/units vested	-52
Restricted shares/units forfeited	-32
Non-vested restricted shares/units as of March 31, 2015	1,005
Time-Based Restricted Stock Units
Restricted Stock and Restricted Stock Units (in shares)
Non-vested restricted shares/units as of June 30, 2014	0
Restricted shares/units converted from ADP equity awards	127
Restricted shares/units granted	180
Restricted shares/units vested	-7
Restricted shares/units forfeited	-12
Non-vested restricted shares/units as of March 31, 2015	288
Performance-Based Restricted Stock
Restricted Stock and Restricted Stock Units (in shares)
Non-vested restricted shares/units as of June 30, 2014	0
Restricted shares/units converted from ADP equity awards	70
Restricted shares/units granted	0
Restricted shares/units vested	0
Restricted shares/units forfeited	0
Non-vested restricted shares/units as of March 31, 2015	70
Performance-Based Restricted Stock Units
Restricted Stock and Restricted Stock Units (in shares)
Non-vested restricted shares/units as of June 30, 2014	0
Restricted shares/units converted from ADP equity awards	89
Restricted shares/units granted	132
Restricted shares/units vested	0
Restricted shares/units forfeited	0
Non-vested restricted shares/units as of March 31, 2015	221

Stock_Based_Compensation_Assum

Stock Based Compensation - Assumptions Used To Estimate Fair Value For Stock Options Granted (Details) (USD $)	9 Months Ended	6 Months Ended
	Mar. 31, 2015	Mar. 31, 2015
Incentive Equity Awards Converted From ADP Awards
Assumptions used
Risk-free interest rate	1.10%
Dividend yield	1.10%
Weighted average volatility factor	23.90%
Weighted average expected life (in years)	3 years 4 months 24 days
Weighted average fair value (in dollars)	$12.50
Employee Stock Option
Assumptions used
Risk-free interest rate		1.60%
Dividend yield		1.10%
Weighted average volatility factor		25.60%
Weighted average expected life (in years)		6 years 3 months 18 days
Weighted average fair value (in dollars)		$10.24

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended			9 Months Ended
	Mar. 31, 2015	Sep. 30, 2014	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Jun. 30, 2014
Related Party Transaction [Line Items]
Deferred tax adjustment to reflect additional tax depreciation				$4,600,000
Valuation allowances	3,400,000			3,400,000		7,100,000
Valuation allowances adjustment		2,300,000
Unrecognized income tax benefits	1,800,000			1,800,000		200,000
Unrecognized income tax benefits that would impact effective tax rate, if recognized	1,500,000			1,500,000		200,000
Unrecognized income tax benefits adjustment related to prior period tax positions				900,000
Effective tax rate	36.00%		29.00%	38.30%	32.40%
Valuation allowance adjustment with favorable impact on effective tax rate			7,200,000		7,200,000
Uncertain tax matters with favorable impact on effective tax rate					3,600,000
State | Income Tax
Related Party Transaction [Line Items]
Income taxes due from (to) related party	900,000			900,000		0
Foreign | Income Tax
Related Party Transaction [Line Items]
Income taxes due from (to) related party	($2,800,000)			($2,800,000)		$0

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income (Details) (USD $)	3 Months Ended		9 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Jun. 30, 2014
Equity [Abstract]
Other comprehensive income (loss)	($23.20)	$6.40	($40.10)	$30.40
Currency translation adjustments, accumulated balances	$45.60		$45.60		$85.70

Transactions_with_ADP_Details

Transactions with ADP (Details) (USD $)	6 Months Ended	0 Months Ended
	Mar. 31, 2015	Sep. 24, 2014	Jun. 30, 2014
Transition Services
Related Party Transaction [Line Items]
Allocated expenses from services provided by ADP	$12,900,000
Data Services
Related Party Transaction [Line Items]
Allocated expenses from services provided by ADP	6,800,000
ADP
Related Party Transaction [Line Items]
Amounts payable to ADP under agreements	$8,300,000		$0
ADP | Transition Services
Related Party Transaction [Line Items]
Service agreements with ADP, term		1 year
ADP | Data Services
Related Party Transaction [Line Items]
Service agreements with ADP, term		2 years

Interim_Financial_Data_by_Segm2

Interim Financial Data by Segment - Revenue and Earnings Before Taxes by Segment (Details) (USD $)	3 Months Ended		9 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting Information [Line Items]
Amortization of intangibles	$7,000,000	$7,100,000	$37,500,000	$21,500,000
Revenues	526,400,000	501,100,000	1,560,400,000	1,470,900,000
Earnings before Income Taxes	91,000,000	100,500,000	232,600,000	268,100,000
Separation costs	600,000	0	34,600,000	0
Segment Reconciling Items
Segment Reporting Information [Line Items]
Revenues	-14,700,000	-1,500,000	-23,500,000	-5,400,000
Earnings before Income Taxes	-2,400,000	-200,000	-4,100,000	300,000
Automotive Retail North America | Operating Segments
Segment Reporting Information [Line Items]
Revenues	347,300,000	321,500,000	1,007,000,000	948,500,000
Earnings before Income Taxes	103,200,000	100,300,000	290,400,000	264,700,000
Automotive Retail International | Operating Segments
Segment Reporting Information [Line Items]
Revenues	87,600,000	85,200,000	261,700,000	255,200,000
Earnings before Income Taxes	13,000,000	12,500,000	41,500,000	37,000,000
Other
Segment Reporting Information [Line Items]
Separation costs	600,000	0	34,600,000	0
Other | Operating Segments
Segment Reporting Information [Line Items]
Earnings before Income Taxes	-33,700,000	-17,700,000	-110,100,000	-51,600,000
Digital Marketing
Segment Reporting Information [Line Items]
Amortization of intangibles			15,600,000
Digital Marketing | Operating Segments
Segment Reporting Information [Line Items]
Revenues	106,200,000	95,900,000	315,200,000	272,600,000
Earnings before Income Taxes	$10,900,000	$5,600,000	$14,900,000	$17,700,000

Subsequent_Events_Details

Subsequent Events (Details) (AVRS, Inc., Subsequent Event, USD $)	0 Months Ended
In Millions, unless otherwise specified	Apr. 02, 2015
AVRS, Inc. | Subsequent Event
Subsequent Event [Line Items]
Business acquisition cost	$50