Dun & Bradstreet 10-K 26 Feb 15 2014 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Jan. 31, 2015	Jun. 30, 2014
Document Documentand Entity Information [Abstract]
Document Type	10-K
Amendment Flag	FALSE
Document Period End Date	31-Dec-14
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	FY
Trading Symbol	DNB
Entity Registrant Name	DUN & BRADSTREET CORP/NW
Entity Central Index Key	1115222
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		35,969,419
Entity Public Float			$4,006

Consolidated_Statements_of_Ope

Consolidated Statements of Operations and Comprehensive Income (USD $)	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Income Statement [Abstract]
Revenue	$1,681.80		$1,655.20		$1,663
Operating Expenses	557.6		550.5		521
Selling and Administrative Expenses	624.7		582.5		602.2
Depreciation and Amortization	63.1	[1]	71.2	[1]	78.3	[1]
Restructuring Charge	14.9		13.9		29.4
Operating Costs	1,260.30		1,218.10		1,230.90
Operating Income	421.5		437.1		432.1
Interest Income	1.7		1.3		0.8
Interest Expense	-43.3		-40.7		-39.5
Other Income (Expense) – Net	-31.3		-1.7		-15.1
Non-Operating Income (Expense) – Net	-72.9		-41.1		-53.8
Income Before Provision for Income Taxes and Equity in Net Income of Affiliates	348.6		396		378.3
Less: Provision for Income Taxes	52.6		135.5		83.1
Equity in Net Income of Affiliates	1.9		1.6		1.3
Net Income	297.9		262.1		296.5
Less: Net (Income) Loss Attributable to the Noncontrolling Interest	-3.5		-3.6		-1
Net Income Attributable to Dun & Bradstreet	294.4		258.5		295.5
Basic Earnings Per Share of Common Stock Attributable to Dun & Bradstreet Common Shareholders	$8.06	[2]	$6.61	[2]	$6.47
Diluted Earnings Per Share of Common Stock Attributable to Dun & Bradstreet Common Shareholders	$7.99	[2]	$6.54	[2]	$6.43
Weighted Average Number of Shares Outstanding-Basic	36.5		39.1		45.6
Weighted Average Number of Shares Outstanding-Diluted	36.9		39.5		46
Cash Dividend Paid Per Common Share	$1.76		$1.60		$1.52
Other Comprehensive Income, Net of Tax:
Net Income (from above)	297.9		262.1		296.5
Foreign Currency Translation Adjustments, no Tax Impact	-46.9		-35.6		17.1
Defined Benefit Pension Plans:
Prior Service Costs, Net of Tax Income (Expense) (1)	1.8	[3]	-5.6	[3]	-6.4	[3]
Net Actuarial Gain (Loss), Net of Tax Income (Expense) (2)	-138.3	[4]	154.4	[4]	-56.2	[4]
Derivative Financial Instruments, Net of Tax Income (Expense) (3)	-0.1	[5]	0	[5]	0.1	[5]
Comprehensive Income, Net of Tax	114.4		375.3		251.1
Less: Comprehensive (Income) Loss Attributable to the Noncontrolling Interest	-3.3		-3.5		-1
Comprehensive Income Attributable to Dun & Bradstreet	$111.10		$371.80		$250.10
[1]	Includes depreciation and amortization of Property, Plant and Equipment, Computer Software and Other Intangibles. The decrease of $8.1 million for the year ended December 31, 2014 as compared to December 31, 2013 was primarily attributed to lower software amortization in 2014 in the North America segment as a result of the impairment of technology software assets in the fourth quarter of 2013 related to our data management infrastructure (data supply chain).The decrease of $7.1 million for the year ended December 31, 2013 as compared to December 31, 2012 was primarily attributed to software assets that became fully depreciated in 2012 and the divestiture of the domestic portion of our Japanese operations to TSR Ltd.
[2]	The number of weighted average shares outstanding changes as common shares are issued for employee benefit plans and other purposes or as shares are repurchased. For this reason, the sum of quarterly earnings per share may not be the same as earnings per share for the year.
[3]	Tax Income (Expense) of $(1.1) million, $3.3 million and $3.1 million during the years ended December 31, 2014, 2013 and 2012, respectively.
[4]	Tax Income (Expense) of $84.9 million, $(91.7) million and $27.2 million during the years ended December 31, 2014, 2013 and 2012, respectively.
[5]	Tax Income (Expense) of $(0.1) million and $(1.9) million during the years ended December 31, 2014 and 2012, respectively. No tax impact during the year ended December 31, 2013

Consolidated_Statements_of_Ope1

Consolidated Statements of Operations and Comprehensive Income (Parenthetical) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement [Abstract]
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit), Tax	($1.10)	$3.30	$3.10
Net Actuarial Gain (Loss), Tax Income (Expense)	84.9	-91.7	27.2
Derivative Financial Instruments, Tax Income (Expense)	-0.1	0	-1.9
Pension Plans Remeasurement Adjustment, Net of Tax	-160	127.9	-78.4
Pension Plans Remeasurement Adjustment, Tax Income (Expense)	$98.20	($75.90)	$38

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Dec. 31, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Current Assets
Cash and Cash Equivalents	$319.40		$235.90
Accounts Receivable, Net of Allowance of $21.0 at December 31, 2014 and $23.9 at December 31, 2013	527.1		518.5
Other Receivables	5.9		6.3
Prepaid Taxes	7.5		9.1
Deferred Income Tax	22.6		14
Current Asset Held for Sale	8.5		0
Other Prepaids	37.2		30.3
Other Current Assets	7.7		8.3
Total Current Assets	935.9		822.4
Non-Current Assets
Property, Plant and Equipment, Net of Accumulated Depreciation of $82.7 at December 31, 2014 and $83.9 at December 31, 2013	27.4	[1]	39.6	[1]
Computer Software, Net of Accumulated Amortization of $350.7 at December 31, 2014 and $474.1 at December 31, 2013	103.7		107.9
Goodwill	575.2	[2]	589.1	[2]
Deferred Income Tax	219		148.4
Other Receivables	12.6		45.6
Other Intangibles (Note 15)	61.6	[3]	76.7	[3]
Other Non-Current Assets	50.8		60.6
Total Non-Current Assets	1,050.30		1,067.90
Total Assets	1,986.20	[4]	1,890.30	[4]
Current Liabilities
Accounts Payable	31.4		41.4
Accrued Payroll	105.6		86.4
Accrued Income Tax	21.7		7.5
Short-Term Debt	301.1		0.1
Other Accrued and Current Liabilities (Note 15)	114.2		116.1
Deferred Revenue	584.9		600.8
Total Current Liabilities	1,158.90		852.3
Pension and Postretirement Benefits	588.2		394.1
Long-Term Debt	1,352.20		1,516
Liabilities for Unrecognized Tax Benefits	30.7		108
Other Non-Current Liabilities	50.8		62.2
Total Liabilities	3,180.80		2,932.60
Contingencies (Note 13)
DUN & BRADSTREET SHAREHOLDERS’ EQUITY (DEFICIT)
Capital Surplus	279.3		270
Retained Earnings	2,831.10		2,600.90
Treasury Stock, at cost, 46.0 shares at December 31, 2014 and 44.1 shares at December 31, 2013	-3,392.40		-3,181.30
Accumulated Other Comprehensive Income (Loss)	-922.1		-738.8
Total Dun & Bradstreet Shareholders’ Equity (Deficit)	-1,203.30		-1,048.40
Noncontrolling Interest	8.7		6.1
Total Equity (Deficit)	-1,194.60		-1,042.30
Total Liabilities and Shareholders’ Equity (Deficit)	1,986.20		1,890.30
Series A Junior Participating Preferred Stock [Member]
DUN & BRADSTREET SHAREHOLDERS’ EQUITY (DEFICIT)
Preferred Stock	0		0
Preferred Stock [Member]
DUN & BRADSTREET SHAREHOLDERS’ EQUITY (DEFICIT)
Preferred Stock	0		0
Series Common Stock [Member]
DUN & BRADSTREET SHAREHOLDERS’ EQUITY (DEFICIT)
Common Stock	0		0
Common Stock [Member]
DUN & BRADSTREET SHAREHOLDERS’ EQUITY (DEFICIT)
Common Stock	$0.80		$0.80
[1]	The decrease in Property, Plant and Equipment – Net is primarily due to reclassification to "Current Assets Held for Sale" for the Parsippany, New Jersey building. See Note 1 and Note 7 to our consolidated financial statements included in this Annual Report on Form 10-K for further detail.
[2]	Goodwill in the North America segment increased to $268.5 million at December 31, 2014 from $265.1 million at December 31, 2013. The increase was primarily a result of two small acquisitions.Goodwill in the Asia Pacific segment decreased to $199.9 million at December 31, 2014 from $210.2 million and $234.0 million at December 31, 2013 and, 2012, respectively. This decrease was primarily due to the negative impact of foreign currency translation.Goodwill in the Europe and Other International Markets decreased to $106.8 million at December 31, 2014 from $113.8 million at December 31, 2013, primarily due to the negative impact of foreign currency translation.
[3]	Customer Relationships - Includes accumulated amortization of $17.1 million and $13.8 million as of December 31, 2014 and 2013, respectively. Trademark and Other - Includes accumulated amortization of $86.9 million and $78.2 million as of December 31, 2014 and 2013, respectively.
[4]	The decrease in assets in the North America segment to $821.1 million at December 31, 2014 from $843.2 million at December 31, 2013 was primarily due to normal software amortization and the impairment charge related to the sale of the Parsippany, New Jersey building.The increase in assets in the North America segment to $843.2 million at December 31, 2013 from $795.4 million at December 31, 2012 was primarily due to increases in cash and computer software. The increase in cash was mainly a function of timing, while the increase in computer software was primarily due to the purchase of perpetual licenses of third-party software.The decrease in assets in the Asia Pacific segment to $355.8 million at December 31, 2014 from $371.9 million and $414.6 million at December 31, 2013 and 2012, respectively, was primarily due to the negative impact of foreign currency translation.The increase in assets in the Europe and Other International Markets segment to $488.8 million at December 31, 2014 from $445.4 million and $365.7 million at December 31, 2013 and 2012, respectively, was primarily due to an increase in cash as a result of operational performance in the region.The increase in assets in “Corporate and Other” to $320.5 million at December 31, 2014 from $229.8 million at December 31, 2013 was primarily due to increased deferred tax assets as a result of the remeasurement of our pension plan obligations in the fourth quarter of 2014.The decrease in assets in “Corporate and Other” to $229.8 million at December 31, 2013 from $416.1 million at December 31, 2012 was primarily due to reduced deferred tax assets as a result of the remeasurement of our pension plan obligations in the fourth quarter of 2013 and a reduction in cash.

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, except Share data, unless otherwise specified
Accounts Receivable, Allowance	$21	$23.90
Property, Plant and Equipment, Accumulated Depreciation	82.7	83.9
Computer Software, Net of Accumulated Amortization of $350.7 at December 31, 2014 and $474.1 at December 31, 2013	$350.70	$474.10
Preferred Stock, par value per share	$0.01
Preferred Stock, authorized	10,000,000
Common Stock, par value per share	$0.01	$0.01
Common Stock, authorized	200,000,000
Treasury Stock, shares	46,000,000	44,100,000
Series A Junior Participating Preferred Stock [Member]
Preferred Stock, par value per share	$0.01	$0.01
Preferred Stock, authorized	500,000	500,000
Preferred Stock, outstanding	0	0
Preferred Stock [Member]
Preferred Stock, par value per share	$0.01	$0.01
Preferred Stock, authorized	9,500,000	9,500,000
Preferred Stock, outstanding	0	0
Series Common Stock [Member]
Common Stock, par value per share	$0.01	$0.01
Common Stock, authorized	10,000,000	10,000,000
Series Common Stock, outstanding	0	0
Common Stock [Member]
Common Stock, par value per share	$0.01	$0.01
Common Stock, authorized	200,000,000	200,000,000
Common Stock, issued	81,900,000	81,900,000

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Cash Flows from Operating Activities:
Net Income	$297.90		$262.10		$296.50
Reconciliation of Net Income to Net Cash Provided by Operating Activities:
Depreciation and Amortization	63.1	[1]	71.2	[1]	78.3	[1]
Amortization of Unrecognized Pension Loss	32.9		33.4		23.5
(Gain) Loss from Sales of Business / Investments	0		0		-6.1
Impairment of Assets	7.3		33.3		16.1
Income Tax Benefit from Stock-Based Awards	4.4		12.2		7
Excess Tax Benefit on Stock-Based Awards	-1.6		-3.5		-2.2
Equity Based Compensation	11.4		8.7		10.6
Restructuring Charge	14.9		13.9		29.4
Restructuring Payments	-15.4		-14.7		-28.2
Changes in Deferred Income Taxes, Net	-72.7		17.8		4.9
Changes in Accrued Income Taxes, Net	13.1		-15.8		-32
Changes in Current Assets and Liabilities:
(Increase) Decrease in Accounts Receivable	-12.8		-8.3		-14.4
(Increase) Decrease in Other Current Assets	-6.5		15.7		9
(Decrease) Increase in Deferred Revenue	-8.7		-8.8		8.9
(Decrease) Increase in Accounts Payable	-7.1		-0.7		3.8
Increase (Decrease) in Accrued Liabilities	23.5		-8.8		-30.6
(Decrease) Increase in Other Accrued and Current Liabilities	0		0		-3.7
Changes in Non-Current Assets and Liabilities:
Decrease (Increase) in Other Long-Term Assets	37.9		-3.4		27.8
Net (Decrease) Increase in Long-Term Liabilities	-64.6		-69.5		-42.8
Net, Other Non-Cash Adjustments	-1.5		-1.5		2
Net Cash Provided by Operating Activities	315.5		333.3		357.8
Cash Flows from Investing Activities:
Proceeds from Sales of Businesses, Net of Cash Divested	0		0.8		9.1
Payments for Acquisitions of Businesses, Net of Cash Acquired	-8.3		0		0
Cash Settlements of Foreign Currency Contracts	-7.8		-7.2		6
Capital Expenditures	-12.2	[2]	-9.5	[2]	-7	[2]
Additions to Computer Software and Other Intangibles	-41.7	[3]	-45.6	[3]	-67.4	[3]
Net, Other	0		-0.1		0.3
Net Cash Used in Investing Activities	-70		-61.6		-59
Cash Flows from Financing Activities:
Payments for Purchases of Treasury Shares	-225		-420		-508
Net Proceeds from Stock-Based Awards	7.7		69.6		20.1
Payment of Bond Issuance Costs	-1.4		0		-5.4
Payment of Debt	0		0		-400
Proceeds from Issuance of Long-Term Debt	0		0		747
Payments of Dividends	-64		-62.5		-69
Proceeds from Borrowings on Credit Facilities	1,109.10		606.2		915.1
Payments of Borrowings on Credit Facilities	-971.1		-379.9		-934.3
Excess Tax Benefit on Stock-Based Awards	1.6		3.5		2.2
Capital Lease and Other Long-Term Financing Obligation Payment	-0.6		-0.6		-2
Net, Other	-0.7		-0.6		-1.6
Net Cash Used in Financing Activities	-144.4		-184.3		-235.9
Effect of Exchange Rate Changes on Cash and Cash Equivalents	-17.6		-0.6		1.8
Increase (Decrease) in Cash and Cash Equivalents	83.5		86.8		64.7
Cash and Cash Equivalents, Beginning of Period	235.9		149.1		84.4
Cash and Cash Equivalents, End of Period	319.4		235.9		149.1
Cash Paid for:
Income Taxes, Net of Refunds	107.9		121.2		103.2
Interest	$42.50		$39.90		$41.80
[1]	Includes depreciation and amortization of Property, Plant and Equipment, Computer Software and Other Intangibles. The decrease of $8.1 million for the year ended December 31, 2014 as compared to December 31, 2013 was primarily attributed to lower software amortization in 2014 in the North America segment as a result of the impairment of technology software assets in the fourth quarter of 2013 related to our data management infrastructure (data supply chain).The decrease of $7.1 million for the year ended December 31, 2013 as compared to December 31, 2012 was primarily attributed to software assets that became fully depreciated in 2012 and the divestiture of the domestic portion of our Japanese operations to TSR Ltd.
[2]	The increase of $3.9 million in capital expenditures in the North America segment for the year ended December 31, 2014 as compared to December 31, 2013 was primarily driven by the purchase of computer hardware related to the DNBi infrastructure upgrade.
[3]	The decrease of $2.3 million in additions to computer software and other intangibles in the North America segment for the year ended December 31, 2014 as compared to December 31, 2013 was mainly due to nonrecurring purchases in the prior year related to MaxCV.The increase of $3.8 million in additions to computer software and other intangibles in the North America segment for the year ended December 31, 2013 as compared to December 31, 2012 was mainly attributed to the purchase of perpetual licenses of third-party software.The decrease of $24.6 million in additions to computer software and other intangibles in “Corporate and Other” for the year ended December 31, 2013 as compared to December 31, 2012 was primarily due to our then non-recurring Strategic Technology Investment or MaxCV related software additions that occurred in the prior year

Consolidated_Statements_of_Sha

Consolidated Statements of Shareholders' Equity (Deficit) (USD $)		Total		Common Stock ($0.01 Par Value) [Member]	Capital Surplus [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Cumulative Translation Adjustment [Member]	Minimum Pension Liability Adjustment [Member]	Derivative Financial Instrument [Member]	Total D&B Shareholders' Equity (Deficit) [Member]	Noncontrolling Interest [Member]
In Millions, unless otherwise specified
Beginning Balance at Dec. 31, 2011		($740.20)		$0.80	$239	$2,179.30	($2,356.30)	($168.30)	($638.40)	$0	($743.90)	$3.70
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		296.5				295.5					295.5	1
Payment to Noncontrolling Interest		-1.2			0						0	-1.2
Sale of Noncontrolling Interest		-0.4										-0.4
Equity-Based Plans		52.1			21.1		31				52.1
Treasury Shares Acquired		-508					-508				-508
Pension Adjustments, net of tax of $83.8 in 2014, $88.4 in 2013 and $30.3 in 2012		-62.6							-62.6		-62.6
Dividend Declared		-69.3				-69.3					-69.3	0
Adjustments to Legacy Tax Matters		1.6			1.6						1.6
Change in Cumulative Translation Adjustment		17.1						17.1			17.1	0
Derivative Financial Instruments, net of tax of $0.1 in 2014, no tax impact 2013, $1.9 in 2012		0.1	[1]							0.1	0.1
Ending Balance at Dec. 31, 2012		-1,014.30		0.8	261.7	2,405.50	-2,833.30	-151.2	-701	0.1	-1,017.40	3.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		262.1				258.5					258.5	3.6
Payment to Noncontrolling Interest		-0.5										-0.5
Equity-Based Plans		80.3			8.3		72				80.3
Treasury Shares Acquired		-420					-420				-420
Pension Adjustments, net of tax of $83.8 in 2014, $88.4 in 2013 and $30.3 in 2012		148.8							148.8		148.8
Dividend Declared		-63.1				-63.1					-63.1	0
Change in Cumulative Translation Adjustment		-35.6						-35.5			-35.5	-0.1
Derivative Financial Instruments, net of tax of $0.1 in 2014, no tax impact 2013, $1.9 in 2012	[1]	0
Ending Balance at Dec. 31, 2013		-1,042.30		0.8	270	2,600.90	-3,181.30	-186.7	-552.2	0.1	-1,048.40	6.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income		297.9				294.4					294.4	3.5
Payment to Noncontrolling Interest		-0.7										-0.7
Equity-Based Plans		23.2			9.3		13.9				23.2
Treasury Shares Acquired		-225					-225				-225
Pension Adjustments, net of tax of $83.8 in 2014, $88.4 in 2013 and $30.3 in 2012		-136.5							-136.5		-136.5
Dividend Declared		-64.2				-64.2					-64.2
Change in Cumulative Translation Adjustment		-46.9						-46.7			-46.7	-0.2
Derivative Financial Instruments, net of tax of $0.1 in 2014, no tax impact 2013, $1.9 in 2012		-0.1	[1]							-0.1	-0.1
Ending Balance at Dec. 31, 2014		($1,194.60)		$0.80	$279.30	$2,831.10	($3,392.40)	($233.40)	($688.70)	$0	($1,203.30)	$8.70
[1]	Tax Income (Expense) of $(0.1) million and $(1.9) million during the years ended December 31, 2014 and 2012, respectively. No tax impact during the year ended December 31, 2013

Consolidated_Statements_of_Sha1

Consolidated Statements of Shareholders' Equity (Deficit) (Parenthetical) (USD $)	12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Stockholders' Equity [Abstract]
Pension Adjustments, tax income (expense)	$83.80	($88.40)	$30.30
Derivative Financial Instruments, tax impact	$0.10	$0	$1.90
Common Stock, par value per share	$0.01	$0.01	$0.01

Description_of_Business_and_Su

Description of Business and Summary of Significant Accounting Policies

12 Months Ended

Dec. 31, 2014

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Description of Business and Summary of Significant Accounting Policies

Description of Business and Summary of Significant Accounting Policies

Description of Business. The Dun & Bradstreet Corporation (“Dun & Bradstreet” or “we” or “us” or “our” or the “Company”) is the world's leading source of commercial data, analytics and insight on businesses. Our global commercial database as of December 31, 2014 contained more than 240 million business records. We transform commercial data into valuable insight which is the foundation of our global solutions that customers rely on to make critical business decisions.

Dun & Bradstreet provides solution sets that meet a diverse set of customer needs globally. Customers use D&B Risk Management Solutions™ to mitigate credit and supplier risk, increase cash flow and drive increased profitability, and D&B Sales & Marketing Solutions™ to provide data management capabilities that provide effective and cost efficient marketing solutions to increase revenue from new and existing customers.

Basis of Presentation. The preparation of financial statements and related disclosures in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the period reported. As discussed throughout this Note 1, we base our estimates on historical experience, current conditions and various other factors that we believe to be reasonable under the circumstances. Significant items subject to such estimates and assumptions include: valuation allowances for receivables and deferred income tax assets; liabilities for potential tax exposure and potential litigation claims and settlements; assets and obligations related to employee benefits; allocation of the purchase price in acquisition accounting; impairment assessment for goodwill and other intangible assets; long-term asset and amortization recoverability; stock-based compensation; revenue deferrals; and restructuring charges. We review estimates and assumptions periodically and reflect the revisions in the consolidated financial statements in the period in which we determine any revisions to be necessary. Actual results could differ materially from those estimates under different assumptions or conditions.

The consolidated financial statements include our accounts, as well as those of our subsidiaries and investments in which we have a controlling interest. Investments in companies over which we have significant influence but not a controlling interest are recorded under the equity method of accounting. Investments over which we do not have significant influence are recorded under the cost method of accounting. We periodically review our investments to determine if there has been any impairment judged to be other than temporary. Such impairments are recorded as write-downs in the consolidated statements of operations and comprehensive income.

All intercompany transactions and balances have been eliminated in consolidation.

Through December 31, 2014, we managed and reported our business through the following three segments:

•

North America (which consists of our operations in the U.S. and Canada);

•

Asia Pacific (which primarily consists of our operations in Australia, Greater China, India and Asia Pacific Worldwide Network); and

•

Europe and other International Markets (which primarily consists of our operations in the United Kingdom ("U.K."), the Netherlands, Belgium, Latin America and our European Worldwide Network).

To further align with our strategy, we began reporting our business as of January 1, 2015 through two segments:

•

Americas (which consists of our operations in the U.S., Canada and Latin America); and

•

Non Americas (which primarily consists of our operations in the U.K., the Netherlands, Belgium, Australia, Greater China, India and our Worldwide Network).

In addition to the changes in our segment reporting that became effective January 1, 2015 that further align our external reporting with our strategy, we also began reporting and monitoring the performance of our Risk Management Solutions as Trade Credit and Other Enterprise Risk Management, and the results of our Sales & Marketing Solutions as Traditional Prospecting Solutions and Advanced Marketing Solutions. Trade Credit represents our traditional commercial credit products such as DNBi. Other Enterprise Risk Management includes all of our remaining Risk Management products, such as our compliance, supply chain and D&B Direct risk solutions. Traditional Prospecting Solutions includes our Hoovers, Market Data Retrieval (“MDR”) and marketing list solutions. Advanced Marketing Solutions includes all of our remaining Sales & Marketing Solutions products including Optimizer and DaaS (Customer Relationship Management ("CRM") and D&B Direct sales and marketing solutions).

The financial statements of the subsidiaries outside North America reflect a fiscal year ended November 30 in order to facilitate the timely reporting of our consolidated financial results and consolidated financial position.

Where appropriate, we have reclassified certain prior year amounts to conform to the current year presentation.

Significant Accounting Policies

Revenue Recognition. Revenue is recognized when the following four conditions are met:

•

Persuasive evidence of an arrangement exists;

•

The contract fee is fixed or determinable;

•

Delivery or performance has occurred; and

•

Collectability is reasonably assured.

If at the outset of an arrangement, we determine that collectability is not reasonably assured, revenue is deferred until the earlier of when collectability becomes probable or the receipt of payment. If there is uncertainty as to the customer’s acceptance of our deliverables, revenue is not recognized until the earlier of receipt of customer acceptance or expiration of the acceptance period. If at the outset of an arrangement, we determine that the arrangement fee is not fixed or determinable, revenue is deferred until the arrangement fee becomes fixed or determinable, assuming all other revenue recognition criteria have been met.

Our Risk Management Solutions are generally sold under fixed price subscription contracts that allow customers unlimited access to risk information. Revenue on this type of contract is recognized ratably over the term of the contract.

Risk information is also sold using monthly or annual contracts that allow customers to purchase our risk information up to the contract amount based on an agreed price list. Once the contract amount is fully used, additional risk information can be purchased at per-item prices, which may be different than those in the original contract. Revenue on these contracts is recognized on a per-item basis as information is purchased and delivered to the customer. If customers do not use the full amount of their contract and forfeit the unused portion, we recognize the forfeited amount as revenue at contract expiration.

Where a data file of risk information is sold with periodic updates to that information, a portion of the revenue related to the updates is deferred as a liability on the balance sheet and recognized as the updates are delivered, usually on a quarterly or monthly basis over the term of the contract.

Revenue related to services, such as monitoring, is recognized ratably over the period of performance.

Sales & Marketing Solutions that provide continuous access to our marketing information and business reference databases may include access or hosting fees which are sold on a subscription basis. Revenue is recognized ratably over the term of the contract, which is typically one year.

Where a data file of marketing information is sold, we recognize revenue upon delivery of the marketing data file to the customer. If the contract provides for periodic updates to that marketing data file, the portion of the revenue related to updates is deferred as a liability on the balance sheet and recognized as the updates are delivered, usually on a quarterly or monthly basis over the term of the contract.

Sales of software that are considered to be more than incidental are recognized in revenue when a noncancelable license agreement has been signed and the software has been shipped and installed, if required.

Revenue from consulting and training services is recognized as the services are performed.

Multiple Element Arrangements

We have certain solution offerings that are sold as multi-element arrangements. The multiple element arrangements or deliverables may include access to our business information database, information data files, periodic data refreshes, software and services. We evaluate each deliverable in an arrangement to determine whether it represents a separate unit of accounting. Most product and service deliverables qualify as separate units of accounting and can be sold stand-alone or in various combinations across our markets. A deliverable constitutes a separate unit of accounting when it has stand-alone value and there are no customer-negotiated refunds or return rights for the delivered items. If the arrangement includes a customer-negotiated refund or return right relative to the delivered items, and the delivery and performance of the undelivered item is considered probable and substantially in our control, the delivered item constitutes a separate unit of accounting.

If the deliverable or a group of deliverables meet the separation criteria, the total arrangement consideration is allocated to each unit of accounting based on its relative selling price. The amount of arrangement consideration that is allocated to a delivered unit of accounting is limited to the amount that is not contingent upon the delivery of another unit of accounting.

We use a hierarchy to determine the selling price to be used for allocating revenue to deliverables: (i) vendor-specific objective evidence of selling prices (“VSOE”); (ii) third-party evidence of selling price (“TPE”); and (iii) best estimated selling prices (“BESP”) of each element. We determine the selling price for each deliverable using VSOE, if it exists, TPE if VSOE does not exist, or BESP if neither VSOE nor TPE exist. Revenue allocated to each element is then recognized when the basic revenue recognition criteria are met for each element.

We determine VSOE of a deliverable by monitoring the price at which we sell the deliverable on a stand-alone basis to third parties or from the stated renewal rate for the elements contained in the initial arrangement. In certain instances, we are not able to establish VSOE for all deliverables in an arrangement with multiple elements. This may be due to us infrequently selling each element separately, not pricing products or services within a set range, or only having a limited sales history. Where we are unable to establish VSOE, we may use the price at which we or a third party sell a similar product to similarly situated customers on a stand-alone basis. Generally, our offerings contain a level of differentiation such that comparable pricing of solutions with similar functionality or delivery cannot be obtained. Furthermore, we are rarely able to reliably determine what similar competitors’ selling prices are on a stand-alone basis. Therefore, we typically are not able to determine TPE of selling price.

When we are unable to establish selling prices by using VSOE or TPE, we establish the BESP in our allocation of arrangement consideration. The objective of BESP is to determine the price at which we would transact a sale if the solution were sold on a stand-alone basis. The determination of BESP is based on our review of available data points and consideration of factors such as but not limited to pricing practices, our growth strategy, geographies and customer segment and market conditions. The determination of BESP is made through consultation with and formal approval of our management, taking into consideration our go-to-market strategy.

We regularly review VSOE and have a review process for TPE and BESP and maintain internal controls over the establishment and updates of these estimates.

Deferred revenue consists of amounts billed in excess of revenue recognized on sales of our information solutions and generally relates to deferral of subscription revenue. Deferred revenue is included in current liabilities in the balance sheet and is subsequently recognized as revenue in accordance with our revenue recognition policies.

We record revenue on a net basis for those sales where we act as an agent or broker in the transaction.

Sales Cancellations. In determining sales cancellation allowances, we analyze historical trends, customer-specific factors and current economic trends. Based on this information, we record an allowance as appropriate.

Restructuring Charges. Restructuring charges have been recorded in accordance with Accounting Standards Codification (“ASC”) 712-10, “Nonretirement Postemployment Benefits,” or “ASC 712-10,” and/or ASC 420-10, “Exit or Disposal Cost Obligations,” or “ASC 420-10,” as appropriate.

We record severance costs provided under an ongoing benefit arrangement once they are both probable and estimable in accordance with the provisions of ASC 712-10.

We account for one-time termination benefits, contract terminations and/or costs to terminate lease obligations less assumed sublease income in accordance with ASC 420-10, which addresses financial accounting and reporting for costs associated with restructuring activities. Under ASC 420-10, we establish a liability for a cost associated with an exit or disposal activity, including severance and lease termination obligations, and other related costs, when the liability is incurred, rather than at the date that we commit to an exit plan. We reassess the expected cost to complete the exit or disposal activities at the end of each reporting period and adjust our remaining estimated liabilities, if necessary.

The determination of when we accrue for severance costs and which standard applies depends on whether the termination benefits are provided under an ongoing arrangement as described in ASC 712-10 or under a one-time benefit arrangement as defined by ASC 420-10. Inherent in the estimation of the costs related to the restructurings are assessments related to the most likely expected outcome of the significant actions to accomplish the exit activities. In determining the charges related to the restructurings, we have to make estimates related to the expenses associated with the restructurings. These estimates may vary significantly from actual costs depending, in part, upon factors that may be beyond our control. We will continue to review the status of our restructuring obligations on a quarterly basis and, if appropriate, record changes to these obligations in current operations based on management’s most current estimates.

Employee Benefit Plans. We provide various defined benefit plans to our employees as well as healthcare benefits to our retired employees. We use actuarial assumptions to calculate pension and benefit costs as well as pension assets and liabilities included in the consolidated financial statements. See Note 10 to the consolidated financial statements included in this Annual Report on Form 10-K for further detail.

Income Taxes and Tax Contingencies. In determining taxable income for financial statement purposes, we must make certain estimates and judgments. These estimates and judgments affect the determination of the recoverability of certain of the deferred tax assets and the calculation of certain tax liabilities, which arise from temporary differences between the tax and financial statement recognition of revenue and expense and net operating losses.

In evaluating our ability to recover our deferred tax assets, we consider all available positive and negative evidence, including our past operating results, the existence of cumulative losses in the most recent years and our forecast of future taxable income. In estimating future taxable income, we develop assumptions, including the amount of future pre-tax operating income, the reversal of temporary differences, and the implementation of feasible and prudent tax planning strategies. These assumptions require significant judgment about the forecasts of future taxable income and are consistent with the plans and estimates we are using to manage the underlying businesses.

We currently have recorded valuation allowances that we will maintain until it is more likely than not the deferred tax assets will be realized. Our income tax expense recorded in the future may be reduced to the extent of decreases in our valuation allowances. The realization of our remaining deferred tax assets is primarily dependent on future taxable income in the appropriate jurisdiction. Any reduction in future taxable income may require that we record an additional valuation allowance against our deferred tax assets. An increase in the valuation allowance could result in additional income tax expense in such period and could have a significant impact on our future earnings. Changes in tax laws and rates could also affect recorded deferred tax assets and liabilities in the future. Management records the effect of a tax rate or law change on our deferred tax assets and liabilities in the period of enactment. Future tax rate or law changes could have a material effect on our financial condition, results of operations or cash flows.

In addition, the calculation of our tax liabilities involves dealing with uncertainties in the application of complex tax regulations in a multitude of jurisdictions across our global operations. We record tax liabilities for anticipated tax audit issues in the U.S. and other tax jurisdictions based on our estimate of whether, and the extent to which, additional taxes will be due. These tax liabilities are reflected net of related tax loss carry-forwards. We adjust these reserves in light of changing facts and circumstances; however, due to the complexity of some of these uncertainties, the ultimate resolution may result in a payment that is materially different from our current estimate of the tax liabilities. If our estimate of tax liabilities proves to be less than the ultimate assessment, an additional charge to expense would result. If a payment or settlement of these amounts ultimately proves to be less than the recorded amounts, the reversal of the liabilities would result in tax benefits being recognized in the period when we determine the liabilities are no longer necessary. We recognize interest and penalties related to unrecognized tax benefits within the “Provision for Income Taxes” line in the consolidated statement of operations and comprehensive income. Accrued interest and penalties are included within the “Liabilities for Unrecognized Benefits” line in the consolidated balance sheet.

Legal Contingencies. We are involved in legal proceedings, claims and litigation arising in the ordinary course of business for which we believe we have adequate reserves, and such reserves are not material to the consolidated financial statements. In addition, from time to time we may be involved in additional matters which could become material and for which we may also establish reserve amounts as discussed in Note 13 to the consolidated financial statements included in this Annual Report on Form 10-K. We record a liability when management believes that it is both probable that a liability has been incurred and we can reasonably estimate the amount of the loss. For such matters where management believes a liability is not probable but is reasonably possible, a liability is not recorded; instead, an estimate of loss or range of loss, if material individually or in the aggregate, is disclosed if reasonably estimable, or a statement will be made that an estimate of loss cannot be made. As additional information becomes available, we adjust our assessment and estimates of such liabilities accordingly.

Cash and Cash Equivalents. We consider all investments purchased with an initial term to maturity of three months or less to be cash equivalents. These instruments are stated at cost, which approximates market value because of the short maturity of the instruments.

Accounts Receivable and Allowance for Bad Debts. Accounts receivable are recorded at the invoiced amount and do not bear interest. With respect to estimating the allowance for bad debts, we analyze the aging of accounts receivable, historical bad debts, customer creditworthiness and current economic trends and we record an allowance as appropriate.

Property, Plant and Equipment. Property, plant and equipment are stated at cost, except for property, plant and equipment that have been impaired for which the carrying amount is reduced to the estimated fair value at the impairment date. Property, plant and equipment are generally depreciated using the straight-line method. Buildings are depreciated over a period of 40 years. Equipment, including furniture, is depreciated over a period of three to ten years. Leasehold improvements are amortized on a straight-line basis over the shorter of the term of the lease or the estimated useful life of the improvement. Property, plant and equipment depreciation and amortization expense for the years ended December 31, 2014, 2013 and 2012 was $8.3 million, $8.1 million and $11.2 million, respectively.

Computer Software. We develop various computer software applications for internal use including systems which support our databases and common business services and processes (back-end systems), our financial and administrative systems (backoffice systems) and systems which we use to deliver our information solutions to customers (customer-facing systems).

We expense costs as incurred during the preliminary development stage which includes conceptual formulation and review of alternatives. Once that stage is complete, we begin the application development stage which includes design, coding and testing. Direct internal and external costs incurred during this stage are capitalized. Capitalization of costs cease when the software is ready for its intended use and all substantial testing is completed. Upgrades and enhancements which provide added functionality are accounted for in the same manner. Maintenance costs incurred solely to extend the life of the software are expensed as incurred. Capitalized costs for internal-use software are amortized over the estimated lives which range from three to eight years.

We periodically reassess the estimated useful lives of our computer software considering our overall technology strategy, the effects of obsolescence, technology, competition and other economic factors on the useful life of these assets.

Internal-use software is tested for impairment along with other long-lived assets (See Impairment of Long-Lived Assets).

We also develop software for sale to customers. Costs are expensed until technological feasibility is established after which costs are capitalized until the software is ready for general release to customers. Costs of enhancements that extend the life or improve the marketability of the software are capitalized once technological feasibility is reached. Maintenance and customer support are expensed as incurred.

Capitalized costs of software for sale are amortized on a straight-line basis over the estimated economic life of the software of three years. We continually evaluate recoverability of the unamortized costs, which are reported at the lower of unamortized cost or net realizable value.

The computer software amortization expense for the years ended December 31, 2014, 2013 and 2012 were $39.7 million, $46.9 million and $49.2 million, respectively. As of December 31, 2014 and 2013, we acquired $1.9 million and $2.9 million, respectively, of computer software, which was included in accounts payable and accrued liabilities on the accompanying consolidated balance sheets as of December 31, 2014 and 2013, and was therefore excluded from the consolidated statements of cash flows for the years ended December 31, 2014 and 2013, respectively.

Goodwill and Other Indefinite-Lived Intangible Assets. Goodwill represents the excess of costs over fair value of assets and liabilities of businesses acquired. Goodwill and intangibles with an indefinite life are not subject to regular periodic amortization. Instead, the carrying amount of the goodwill and indefinite-lived intangibles is tested for impairment at least annually and between annual tests if events or circumstances warrant such a test. An impairment loss would be recognized if the carrying amount exceeded the fair value.

We assess recoverability of goodwill at the reporting unit level. A reporting unit is an operating segment or a component of an operating segment that is a business for which discrete financial information is available and reviewed by a segment manager. Our reporting units are North America, United Kingdom, Benelux (the Netherlands and Belgium), Europe Partnerships, Latin America, Greater China, Asia Partnerships, Australia and India. We perform a two-step goodwill impairment test. In the first step, we compare the fair value of each reporting unit to its carrying value. If the fair value of the reporting unit exceeds the carrying value of the net assets, including goodwill assigned to that reporting unit, goodwill is not impaired and no further test is performed. However, if the carrying value of the net assets assigned to the reporting unit exceeds the fair value of the reporting unit, the second step of the impairment test is performed to determine the magnitude of the impairment, which is the implied fair value of the reporting unit's goodwill compared to the carrying value. The implied fair value of goodwill is the difference between the fair value of the reporting unit and the fair value of its identifiable net assets. If the carrying value of goodwill exceeds the implied fair value of goodwill, the impaired goodwill is written down to its implied fair value and an impairment loss equal to this difference is recorded in the period that the impairment is identified as an operating expense.

We determine the fair value of our reporting units based on the market approach and also in certain instances use the income approach to further validate our results. Under the market approach, we estimate the fair value based on market multiples of current year earnings before interest, taxes, depreciation and amortization (“EBITDA”) for each individual reporting unit. For the market approach, we use judgment in identifying the relevant comparable-company market multiples (i.e., recent divestitures/acquisitions, facts and circumstances surrounding the market, dominance, growth rate, etc.). For the income approach, we use projections based on management's most recent view of the long-term outlook for each reporting unit. Factors specific to each reporting unit include revenue growth, profit margins, terminal value growth rates, capital expenditures projections, assumed tax rates, discount rates and other assumptions deemed reasonable by management.

For indefinite-lived intangibles, other than goodwill, an impairment loss is recognized if the carrying value exceeds the fair value. The estimated fair value is determined by utilizing the expected present value of the future cash flows of the assets.

No impairment charges were recognized related to goodwill and indefinite-lived intangible assets for the fiscal years ended December 31, 2014, 2013 and 2012.

Other intangibles, which primarily include customer lists and relationships, trademarks and technology related assets resulting from acquisitions, are being amortized over one to 16 years based on their estimated useful life using the straight-line method. Other intangibles amortization expense for the years ended December 31, 2014, 2013 and 2012 were $15.1 million, $15.9 million and $17.3 million, respectively. Other intangibles are tested for recoverability along with other long-lived assets, excluding goodwill and indefinite-lived intangibles, whenever events or circumstances indicate the carrying value may not be recoverable. See “Impairment of Long-Lived Assets” below.

Expected future amortization of acquired intangible assets as of December 31, 2014 is as follows:

Total

2015

2016

2017

2018

2019

Thereafter

$

61.6

$

12.2

$

11.3

$

7.5

$

6.2

$

5.3

$

19.1

Impairment of Long-Lived Assets. Long-lived assets, including property, plant and equipment, internal-use software and other intangible assets held for use, are tested for impairment when events or circumstances indicate the carrying amount of the asset group that includes these assets is not recoverable. An asset group is the lowest level for which its cash flows are independent of the cash flows of other asset groups. The carrying value of an asset group is not considered recoverable if the carrying value exceeds the sum of the undiscounted cash flows expected to result from the use and eventual disposition of the asset group. The impairment loss is measured by the difference between the carrying value of the asset group and its fair value. We generally estimate the fair value of an asset group using an income approach or quoted market price, whichever is applicable.

During the third quarter of 2014, we recorded an impairment charge of $7.3 million related to our facility in Parsippany, New Jersey resulting from the decision to exit this facility. At that time, the expected sales price was approximately $8.5 million. We performed an assessment on the recoverability of the asset group in accordance with ASC 360-10-35 “Property, Plant and Equipment.” Comparison of the expected cash flows from the then expected sale and the carrying value of the asset group indicated that the carrying amount of the asset group was not expected to be fully recoverable. Furthermore, the carrying value of the asset group was written down to its fair value. The fair value of the asset group was based on the quoted market price, which is considered a Level II input. The impairment charge was included in “Operating Costs” in our North America reporting segment. Below is a summary of the components of the asset group and its carrying value as of September 30, 2014:

Carrying Value

Building and Building Improvements

$

9.9

Land

4.7

Furniture and Fixtures

0.3

Machinery and Equipment

0.4

Total

$

15.3

In December 2014, we entered into a sale arrangement for $8.5 million for this property pursuant to which our employees will continue to utilize this space until they can be relocated to our newly leased location at 101 JFK Parkway in Short Hills, New Jersey. It is expected that such actions will be completed no later than December 31, 2015. We have ceased to depreciate the above asset group since the third quarter of 2014. The asset group was reported as “Current Assets Held for Sale” in our consolidated balance sheet as of December 31, 2014.

During the fourth quarter of 2013, we recorded an impairment charge of $31.3 million primarily related to technology and software assets that were primarily related to our data management infrastructure (data supply chain) in our North America segment. We can improve data collection through other commercially available means, as needed. We determined that the fair value of these assets was zero based on Level III inputs (see “Fair Value of Financial Instruments” below for discussion on Level inputs), as market data was not readily available. Of the $31.3 million impairment charge, $28.6 million was included in “Operating Costs” and $2.7 million was included in “Selling and Administrative Expenses” in our North America segment.

During the fourth quarter of 2013, we also recorded an impairment charge of $1.7 million related to our China Trade Portal (“Portal”) asset resulting from lower than expected product revenue. We decided to sunset the Portal product and migrate our existing Portal customers to an enhanced version of our existing DUNS Registered Seal product. We determined that the fair value of these assets was zero based on Level III inputs (see “Fair Value of Financial Instruments” below for discussion on Level inputs) as market data was not readily available. The impairment charge was included in “Operating Costs” in our Asia Pacific segment.

During the first quarter of 2012, we recorded an impairment charge of $12.9 million related to the accounts receivable, intangible assets, prepaid costs and software for Roadway, an operation in our Greater China reporting unit. See Note 13 to the consolidated financial statements included in this Annual Report on Form 10-K for further discussion. We determined that the fair value of these intangible assets, prepaid costs and software was zero based on Level III inputs (see “Fair Value of Financial Instruments” below for discussion on Level inputs), as market data of these assets were not readily available. We wrote down the accounts receivable balance to its realizable value based on the probability of collecting from the customer accounts. Of the $12.9 million impairment charge, $4.1 million was included in “Operating Costs” and $8.8 million was included in “Selling and Administrative Expenses” in our Asia Pacific segment.

Foreign Currency Translation. For all operations outside the U.S. where we have designated the local currency as the functional currency, assets and liabilities are translated using the end-of-year exchange rates, and revenues and expenses are translated using average exchange rates for the year. For those countries where we designate the local currency as the functional currency, translation adjustments are accumulated in a separate component of shareholders’ equity. Transaction gains and losses are recognized in earnings in the consolidated statement of operations and comprehensive income. We recorded foreign currency transaction income of less than $0.1 million, $0.1 million and $0.9 million for the years ended December 31, 2014, 2013 and 2012, respectively.

Earnings Per Share (“EPS”) of Common Stock. Basic EPS is calculated based on the weighted average number of shares of common stock outstanding during the reporting period. Diluted EPS is calculated giving effect to all potentially dilutive common shares, assuming such shares were outstanding during the reporting period. The difference between basic and diluted EPS is solely attributable to stock options and restricted stock programs. We use the treasury stock method to calculate the impact of outstanding stock options and restricted stock units.

We are required to include in our computation of diluted EPS any contingently issuable shares that have satisfied all the necessary conditions by the end of the reporting period or would have satisfied all necessary conditions if the end of the reporting period was the end of the performance period. Contingently issuable shares are shares that issuance is contingent upon the satisfaction of certain conditions other than just service. Our performance-based restricted stock units are deemed to be contingently issuable shares.

In addition, we are required to assess if any of our share-based payment transactions are deemed participating securities prior to vesting and therefore need to be included in the earnings allocation when computing EPS under the two-class method. The two-class method requires earnings to be allocated between common shareholders and holders of participating securities. All outstanding unvested share-based payment awards that contain non-forfeitable rights to dividends are considered to be a separate class of common stock and should be included in the calculation of basic and diluted EPS. Based on a review of our stock-based awards, we have determined that only our restricted stock awards are deemed participating securities.

Stock-Based Compensation. Our stock-based compensation programs are described more fully in Note 11 to the consolidated financial statements included in this Annual Report on Form 10-K.

The compensation expense of our stock-based compensation programs is calculated by estimating the fair value of each stock-based award at the date of grant. The stock-based compensation expense is recognized over the shorter of the award’s vesting period or the period from the date of grant to the date when retirement eligibility is achieved. In addition, we estimate future forfeitures in calculating the stock-based compensation expense as opposed to only recognizing these forfeitures and the corresponding reductions in expense as they occur.

For stock option awards, the fair value is estimated on the date of grant using the Black-Scholes option valuation model. The Black-Scholes option valuation model requires that we make assumptions about the stock price volatility, dividend yield, expected term of the stock option and risk-free interest rates. Our expected stock price volatility assumption is derived from the historical volatility of our common stock. The expected dividend yield assumption is determined by dividing the anticipated annual dividend payment by the stock price on the date of grant. We determine our expected term assumption using a midpoint scenario that combines our historical exercise data with hypothetical exercise data for our unexercised stock options. Our risk-free interest rate assumption corresponds to the expected term assumption of the stock option and is based on the U.S. Treasury yield curve in effect at the time of grant.

For restricted stock unit awards which vest based solely on service, the fair value is estimated by using the average of the high and low prices of our common stock on the date of grant.

For performance-based restricted stock units which have performance conditions, the fair market value is estimated by using the average of the high and low prices of our common stock on the date of grant. Compensation cost recognized over the performance period is based on the expected outcome of the performance condition. For performance-based restricted stock units which have market conditions, the fair market value is estimated on the date of grant using a Monte Carlo valuation model, which estimates possible outcomes of market conditions. Incorporated into the fair value of these awards is the possibility that the market conditions may not be satisfied. Compensation cost related to awards with market conditions are recognized regardless of whether the market condition is satisfied, provided that the requisite service has been satisfied. The Monte Carlo valuation model requires that we make assumptions about the stock price volatility, dividend yield, expected term of the award and risk-free interest rates. Our expected stock price volatility assumption is derived from the historical volatility of our common stock or for certain awards, a blend of historical volatility and, when available, implied volatility of our common stock. The expected dividend yield assumption is determined by dividing our most recent quarterly dividend payment by the average of the stock price from the three months preceding the grant date. The result is then annualized and compounded. Expected term is based on the period from date of grant through the end of the performance evaluation period. Our risk-free interest rate assumption corresponds to the expected term assumption of the stock option and is based on the U.S. Treasury yield curve in effect at the time of grant.

If factors change, we may decide to use different assumptions under our valuation models and our forfeiture assumption in the future, which could materially affect our stock-based compensation expense, operating income, net income and earnings per share.

Financial Instruments. We use financial instruments, including foreign exchange forward contracts, option contracts and interest rate derivatives, to manage our exposure to movements in foreign exchange rates and interest rates. The use of these financial instruments modifies our exposure to these risks in order to minimize the potential negative impact and/or to reduce the volatility that these risks may have on our financial results.

We recognize all such financial instruments as either assets or liabilities on the balance sheet and measure those instruments at fair value. We do not use derivative financial instruments for trading or speculative purposes.

We use foreign exchange forward and option contracts to hedge certain non-functional currency-denominated intercompany and third-party transactions. These foreign exchange forward and option contracts are marked-to-market and the resulting remeasurement gains and losses are recorded as other income or expense. In addition, foreign exchange forward and option contracts are used to hedge certain of our foreign net investments. The gains and losses associated with these contracts are recorded in “Cumulative Translation Adjustment,” a component of shareholders’ equity.

From time to time, we use interest rate swap agreements to hedge long-term fixed-rate debt. When executed, we designate such swaps as fair-value hedges and assess whether the swaps are highly effective in offsetting changes in the fair value of the hedged debt. We formally document all relationships between hedging instruments and hedged items, and we have documented policies for managing our exposures. Changes in the fair values of interest rate swap agreements that are designated fair-value hedges are recognized in earnings as an adjustment of interest expense. The hedge accounting effectiveness is monitored on an ongoing basis, and if considered ineffective, we discontinue hedge accounting prospectively. See Note 7 to the consolidated financial statements included in this Annual Report on Form 10-K.

Fair Value Measurements. We account for certain assets and liabilities at fair value. We define fair value as the exchange price that would be received for an asset or paid to transfer a liability (in either case an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants at the measurement date. Additionally, the inputs used to measure fair value are prioritized based on a three-level hierarchy. This hierarchy requires entities to maximize the use of observable inputs and minimize the use of unobservable inputs. The three levels of inputs used to measure fair value are as follows:

Level Input

Input Definition

Level I

Observable inputs utilizing quoted prices (unadjusted) for identical assets or liabilities in active markets at the measurement date.

Level II

Inputs other than quoted prices included in Level I that are either directly or indirectly observable for the asset or liability through corroboration with market data at the measurement date.

Level III

Unobservable inputs for the asset or liability in which little or no market data exists, therefore requiring management’s best estimate of what market participants would use in pricing the asset or liability at the measurement date.

In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, the level in the fair value hierarchy within which the fair value measurement in its entirety falls has been determined based on the lowest level input that is significant to the fair value measurement in its entirety. Our assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability.

The estimated fair values of financial assets and liabilities and certain non-financial assets and liabilities, which are presented herein, have been determined by our management using available market information and appropriate valuation methodologies. However, judgment is required in interpreting market data to develop estimates of fair value. Accordingly, the estimates presented herein may not necessarily be indicative of amounts we could realize in a current market sale. See Note 7 to the consolidated financial statements included in this Annual Report on Form 10-K.

Recent_Accounting_Pronouncemen

Recent Accounting Pronouncements	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Recent Accounting Pronouncements	Recent Accounting Pronouncements
	We consider the applicability and impact of all Accounting Standards Updates (“ASUs”). The ASUs not listed below were assessed and determined to be either not applicable or are expected to have minimal impact on our consolidated financial position and/or results of operations.
	In January 2015, the Financial Accounting Standards Board (“FASB”) issued ASU 2015-01 “Income Statement Extraordinary and Unusual Items (Subtopic 225-20): Simplifying Income Statement Presentation by Eliminating the Concept of Extraordinary Items.” This standard eliminates such concept from existing GAAP. Under the new guidance an entity is no longer required to: (i) segregate an extraordinary item from the results of ordinary operations; (ii) separately present an extraordinary item on its income statement, net of tax, after income from continuing operations; and (iii) disclose income taxes and earnings-per share data applicable to an extraordinary item. The new standard retains the existing requirement to separately present on a pre-tax basis within income from continuing operations items that are of an unusual nature or occur infrequently. Additionally, the new standard requires similar separate presentation of items that are both unusual and infrequent in nature. The standard is effective for fiscal years and the interim periods within those fiscal years beginning on or after December 15, 2015. The guidance may be applied prospectively or retrospectively to all prior periods presented in the financial statements, with additional disclosures for entities electing prospective application. Early application is permitted as of the beginning of the fiscal year of adoption. We do not expect that the adoption of this authoritative guidance will have a material impact on our consolidated financial statements.
	In November 2014, the FASB issued ASU 2014-17 “Business Combinations (Topic 805): Pushdown Accounting (a consensus of the FASB Emerging Issues Task Force).” This standard provides an acquired business the option to apply pushdown accounting in its separate financial statements upon a change-in-control event. Concurrently, the SEC eliminated its guidance under SAB Topic 5.J. “New Basis of Accounting Required in Certain Circumstances” which had required or precluded pushdown accounting based on the percentage of ownership. The standard became effective upon issuance for new change-in-control events or to the most recent change-in-control event. An acquiree may elect to apply pushdown accounting retrospectively, as a change in accounting principle, for its most recent change-in-control event for which it did not previously apply pushdown accounting. The new standard requires the acquiree to provide certain disclosures upon election of pushdown accounting consistent with those required under the guidance for business combinations. We do not expect that the adoption of this authoritative guidance will have a material impact on our consolidated financial statements.
	In May 2014, the FASB issued ASU No. 2014-09, “Revenue from Contracts with Customers (Topic 606),” which outlines a single comprehensive model to use in accounting for revenue arising from contracts with customers and supersedes and replaces nearly all existing GAAP revenue recognition guidance, including industry-specific guidance. The authoritative guidance provides a five-step analysis of transactions to determine when and how revenue is recognized. The five steps are: (i) identify the contract with the customer; (ii) identify the performance obligations in the contract; (iii) determine the transaction price; (iv) allocate the transaction price to the performance obligations; and (v) recognize revenue when or as each performance obligation is satisfied. The authoritative guidance applies to all contracts with customers except those that are within the scope of other topics in the FASB Accounting Standards Codification. The authoritative guidance requires significantly expanded disclosures about revenue recognition and is effective for fiscal years and the interim periods within these fiscal years beginning on or after December 15, 2016. Early application is not permitted and companies have the option of using either a full retrospective or a modified approach to adopting the authoritative guidance. We are currently assessing the impact of the adoption of this authoritative guidance on our consolidated financial statements.
	In April 2014, the FASB issued ASU No. 2014-08, “Presentation of Financial Statements (Topic 205) and Property, Plant, and Equipment (Topic 360): Reporting Discontinued Operations and Disclosures of Disposals of Components of an Entity,” which changes the requirements for reporting discontinued operations by limiting it to disposals representing a strategic shift that has or will have a major effect on the entity’s operations and financial results. An entity will be required to: (i) present the assets and liabilities of a disposal group that includes a discontinued operation separately in the statement of financial position; and (ii) expand disclosures about the discontinued operations. The authoritative guidance was effective for fiscal years and the interim periods within those fiscal years beginning on or after December 15, 2014 and should be applied on a prospective basis. We do not expect that the adoption of this authoritative guidance will have a material impact on our consolidated financial statements.
	In July 2013, the FASB issued ASU No. 2013-11, “Income Taxes (Topic 740): Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss or a Tax Credit Carryforward Exists (a consensus of the FASB Emerging Issues Task Force),” which states that an unrecognized tax benefit, or a portion of an unrecognized tax benefit, should be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar tax loss, or a tax credit carryforward. If a company does not have: (i) a net operating loss carryforward; (ii) a similar tax loss; or (iii) a tax credit carryforward which is not available at the reporting date under the tax law of the applicable jurisdiction to settle any additional income taxes that would result from the disallowance of a tax position, or the entity does not intend to use the deferred tax asset for such purpose, the unrecognized tax benefit should be presented in the financial statements as a liability and should not be combined with deferred tax assets. The authoritative guidance was effective for fiscal years and the interim periods within those fiscal years beginning on or after December 15, 2013 and should be applied on a prospective basis. The adoption of this authoritative guidance did not have a material impact on the consolidated financial statements.
	In March 2013, the FASB issued ASU No. 2013-5, “Foreign Currency Matters (Topic 830): Parent’s Accounting for the Cumulative Translation Adjustment upon Derecognition of Certain Subsidiaries or Groups of Assets within a Foreign Entity or of an Investment in a Foreign Entity (a consensus of the FASB Emerging Issues Task Force),” which states that a cumulative translation adjustment (“CTA”) is attached to the parent’s investment in a foreign entity and should be released in a manner consistent with the derecognition guidance on investments in entities. The entire amount of the CTA associated with the foreign entity would be released when there has been a: (i) sale of a subsidiary or group of net assets within a foreign entity and the sale represents the substantially complete liquidation of the investment in the foreign entity; (ii) loss of a controlling financial interest in an investment in a foreign entity; and (iii) step acquisition for a foreign entity. The authoritative guidance does not change the requirement to release a pro rata portion of the CTA of the foreign entity into earnings for a partial sale of an equity method investment in a foreign entity. The authoritative guidance was effective for fiscal years and the interim periods within those fiscal years beginning on or after December 15, 2013 and should be applied on a prospective basis. The adoption of this authoritative guidance did not have a material impact on the consolidated financial statements.

Restructuring_Charge

Restructuring Charge	12 Months Ended
	Dec. 31, 2014
Restructuring and Related Activities [Abstract]
Restructuring Charge	Restructuring Charge
	We incurred restructuring charges (which generally consist of employee severance and termination costs, contract terminations and/or costs to terminate lease obligations less assumed sublease income). These charges were incurred as a result of eliminating, consolidating, standardizing and/or automating our business functions.
	Restructuring charges have been recorded in accordance with ASC 712-10, “Nonretirement Postemployment Benefits,” or “ASC 712-10” and/or ASC 420-10, “Exit or Disposal Cost Obligations,” or “ASC 420-10,” as appropriate.
	We record severance costs provided under an ongoing benefit arrangement once they are both probable and estimable in accordance with the provisions of ASC 712-10.
	We account for one-time termination benefits, contract terminations and/or costs to terminate lease obligations less assumed sublease income in accordance with ASC 420-10, which addresses financial accounting and reporting for costs associated with restructuring activities. Under ASC 420-10, we establish a liability for costs associated with an exit or disposal activity, including severance and lease termination obligations, and other related costs, when the liability is incurred, rather than at the date that we commit to an exit plan. We reassess the expected cost to complete the exit or disposal activities at the end of each reporting period and adjust our remaining estimated liabilities, if necessary.
	The determination of when we accrue for severance costs and which standard applies depends on whether the termination benefits are provided under an ongoing arrangement as described in ASC 712-10 or under a one-time benefit arrangement as defined by ASC 420-10. Inherent in the estimation of the costs related to the restructurings are assessments related to the most likely expected outcome of the significant actions to accomplish the exit activities. In determining the charges related to the restructurings, we have to make estimates related to the expenses associated with the restructurings. These estimates may vary significantly from actual costs depending, in part, upon factors that may be beyond our control. We will continue to review the status of our restructuring obligations on a quarterly basis and, if appropriate, record changes to these obligations in current operations based on management’s most current estimates.
	During the year ended December 31, 2014, we recorded a $14.9 million restructuring charge. The significant components of these charges included:
	•	Severance and termination costs of $13.0 million in accordance with the provisions of ASC 712-10 were recorded. Approximately 155 employees were impacted. Of these 155 employees, approximately 145 employees exited the Company in 2014 and approximately 10 employees will exit the Company in 2015. The cash payments for these employees will be substantially completed by the second quarter of 2015; and
	•	Contract termination, lease termination obligations and other exit costs including those to consolidate or close facilities and impairments of $1.9 million.
	During the year ended December 31, 2013, we recorded a $13.9 million restructuring charge. The significant components of these charges included:
	•	Severance and termination costs of $8.2 million in accordance with the provisions of ASC 712-10 were recorded. Approximately 160 employees were impacted. Of these 160 employees, approximately 140 employees exited the Company in 2013 and approximately 20 employees exited the Company in 2014. The cash payments for these employees were substantially completed by the second quarter of 2014; and
	•	Contract termination, lease termination obligations and other exit costs including those to consolidate or close facilities of $5.7 million.
	During the year ended December 31, 2012, we recorded a $29.4 million restructuring charge. The significant components of these charges included:
	•	Severance and termination costs of $17.7 million and $5.0 million in accordance with the provisions of ASC 712-10 and ASC 420-10, respectively, were recorded. Approximately 765 employees were impacted. Of these 765 employees, approximately 690 employees exited the Company in 2012 and approximately 75 employees exited the Company in 2013. The cash payments for these employees were substantially completed by the third quarter of 2013; and
	•	Contract termination, lease termination obligations, other exit costs including those to consolidate or close facilities of $6.7 million.
	The following tables set forth, in accordance with ASC 712-10 and/or ASC 420-10, the restructuring reserves and utilization:
		Severance			Contract Termination, Lease			Total
		and			Termination
		Termination			Obligations
					and Other
					Exit Costs
	Restructuring Charges:
	Balance Remaining as of January 1, 2012	$	8.3		$	2.2		$	10.5
	Charge Taken during the Year Ended December 31, 2012	22.7			6.7			29.4
	Payments during the Year Ended December 31, 2012	(21.6		)	(6.6		)	(28.2		)
	Balance Remaining as of December 31, 2012	$	9.4		$	2.3		$	11.7
	Charge Taken during the Year Ended December 31, 2013	8.2			5.7			13.9
	Payments/Asset Impairment(1) during the Year Ended December 31, 2013	(11.8		)	(3.4		)	(15.2		)
	Balance Remaining as of December 31, 2013	$	5.8		$	4.6		$	10.4
	Charge Taken during the Year Ended December 31, 2014	13			1.9			14.9
	Payments during the Year Ended December 31, 2014	(10.7		)	(4.7		)	(15.4		)
	Balance Remaining as of December 31, 2014	$	8.1		$	1.8		$	9.9
	-1	We incurred an asset impairment of $0.5 million in the first quarter of 2013 related to the termination of a lease.
	For initiatives taken during the years ended December 31, 2013 and 2012, all actions were substantially completed as of December 31, 2014.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive income Accumulated Other Comprehensive Income (Notes)	12 Months Ended
	Dec. 31, 2014
Accumulated other Comprehensive income [Abstract]
Comprehensive Income (Loss) Note [Text Block]	The following table summarizes the changes in the accumulated balances for each component of accumulated other comprehensive income (“AOCI”) as of December 31, 2014 and 2013:
		Foreign Currency Translation Adjustments				Defined Benefit Pension Plans				Derivative Financial Instruments				Total
	31-Dec-12	$	(151.2	)		$	(701.0	)		$	0.1			$	(852.1	)
	Other Comprehensive Income Before Reclassifications	(35.5		)		127.9				—				92.4
	Amounts Reclassified From Accumulated Other Comprehensive Income, net of tax	—				20.9				—				20.9
	31-Dec-13	$	(186.7	)		$	(552.2	)		$	0.1			$	(738.8	)
	Other Comprehensive Income Before Reclassifications	(46.7		)		(156.9		)		(0.1		)		(203.7		)
	Amounts Reclassified From Accumulated Other Comprehensive Income, net of tax	—				20.4				—				20.4
	31-Dec-14	$	(233.4	)		$	(688.7	)		$	—			$	(922.1	)
	The following table summarizes the reclassifications out of AOCI as of December 31, 2014, 2013 and 2012:
	Details About Accumulated Other Comprehensive Income Components	Affected Line Item in the Statement Where Net Income is Presented		Amount Reclassified from Accumulated Other Comprehensive Income
				For the Years Ended December 31,
				2014				2013				2012
	Foreign Currency Translation Adjustments:
	Sale of Business	Other Income (Expense) – Net		$	—			$	—			$	(1.3	)
	Defined Benefit Pension Plans:
	Amortization of Prior Service Costs	Selling and Administrative Expenses		$	(1.5	)		$	(6.4	)		$	(7.1	)
		Operating Expenses		(0.6		)		(2.5		)		(2.5		)
	Amortization of Actuarial Gain/Loss	Selling and Administrative Expenses		24.9				30.5				24.6
		Operating Expenses		10.1				11.8				8.5
	Total Before Tax			32.9				33.4				23.5
	Tax (Expense) or Benefit			(12.5		)		(12.5		)		(7.7		)
	Total After Tax			$	20.4			$	20.9			$	15.8
	Derivative Financial Instruments:
	Amortization of Cash Flow Hedges	Interest Expense		$	—			$	—			$	1.7
	Loss on Derivative	Other Income (Expense) - Net		—				—				0.3
	Total Before Tax			—				—				2
	Tax (Expense) or Benefit			—				—				(1.9		)
	Total After Tax			$	—			$	—			$	0.1
	Total Reclassifications for the Period, Net of Tax			$	20.4			$	20.9			$	14.6

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes
	Income before provision for income taxes consisted of:
			For the Years Ended December 31,
			2014				2013				2012
	U.S.		$	221.1			$	319.5			$	295.1
	Non-U.S.		127.5				76.5				83.2
	Income Before Provision for Income Taxes, and Equity in Net Income of Affiliates		$	348.6			$	396			$	378.3
	The provision for income taxes consisted of:
			For the Years Ended December 31,
			2014				2013				2012
	Current Tax Provision:
	U.S. Federal		$	2.8			$	81.6			$	45.9
	State and Local		11.7				8.3				6.8
	Non-U.S.		23.6				21.2				10.3
	Total Current Tax Provision		$	38.1			$	111.1			$	63
	Deferred Tax Position:
	U.S. Federal		$	6.6			$	30.8			$	15.4
	State and Local		4.3				(2.6		)		3.1
	Non-U.S.		3.6				(3.8		)		1.6
	Total Deferred Tax Provision		$	14.5			$	24.4			$	20.1
	Provision for Income Taxes		$	52.6			$	135.5			$	83.1
	The following table summarizes the significant differences between the U.S. Federal statutory tax rate and our effective tax rate for financial statement purposes:
			For the Years Ended December 31,
			2014			2013			2012
	Statutory Tax Rate		35	%		35	%		35	%
	State and Local Taxes, net of U.S. Federal Tax Benefits		3			0.9			1.5
	Nondeductible Charges		4.6			0.4			2.8
	U.S. Taxes on Foreign Income		1.4			1.3			1
	Non-U.S. Taxes		(1.6	)		(1.7	)		(3.3	)
	Valuation Allowance		(0.1	)		0.4			(0.7	)
	Interest		(1.9	)		0.5			(0.8	)
	Tax Credits and Deductions		(5.9	)		(3.2	)		(3.3	)
	Tax Contingencies Related to Uncertain Tax Positions		(4.8	)		0.4			0.5
	Impact of Legacy Tax Matters (1)		(14.9	)		—			(6.9	)
	Loss on Investment		—			—			(4.1	)
	Other		0.3			0.2			0.3
	Effective Tax Rate		15.1	%		34.2	%		22	%
	(1) The impact for 2014 was due to the release of reserves for uncertain tax positions due to the effective settlement of audits for the 2007 - 2009 tax years and the expiration of the statute of limitations for the 2010 tax year.
	The impact for 2012 was due to the release of reserves for uncertain tax positions due to the expiration of the statute of limitations for the 2005 - 2006 tax years.
	Income taxes paid were $109.4 million, $126.1 million and $110.2 million for the years ended December 31, 2014, 2013 and 2012, respectively. Income taxes refunded were $1.5 million, $4.9 million and $7.0 million for the years ended December 31, 2014, 2013 and 2012, respectively.
	Deferred tax assets (liabilities) are comprised of the following:
			December 31,
			2014				2013
	Deferred Tax Assets:
	Operating Losses		$	33.6			$	41.9
	Restructuring Costs		2.6				2.6
	Bad Debts		4.5				5.2
	Accrued Expenses		16.2				12.6
	Capital Loss and Credit Carryforwards		17.7				11.5
	Other		0.7				2
	Pension and Postretirement Benefits		223.1				145.9
	Total Deferred Tax Assets		298.4				221.7
	Valuation Allowance		(36.9		)		(38.3		)
	Net Deferred Tax Assets		$	261.5			$	183.4
	Deferred Tax Liabilities:
	Intangibles		$	(30.1	)		$	(35.7	)
	Fixed Assets		(3.9		)		(4.2		)
	Other		(2.7		)		(0.7		)
	Total Deferred Tax Liabilities		$	(36.7	)		$	(40.6	)
	Net Deferred Tax Assets		$	224.8			$	142.8
	We have not provided for U.S. deferred income taxes or foreign withholding taxes on $753.1 million of undistributed earnings of our non-U.S. subsidiaries as of December 31, 2014, since we intend to reinvest these earnings indefinitely. Additionally, we have not determined the tax liability if such earnings were remitted to the U.S., as the determination of such liability is not practicable.
	We have federal, state and local, and foreign tax loss carry-forwards, the tax effect of which was $33.6 million as of December 31, 2014. Approximately $28.4 million of these tax benefits have an indefinite carry-forward period. The remainder of $5.2 million expires at various times between 2015 and 2025.
	We have established a valuation allowance against non-U.S. net operating losses in the amount of $24.5 million, $26.8 million and $25.2 million for the years ended December 31, 2014, 2013 and 2012, respectively, that in the opinion of our management are more likely than not to expire before we can utilize them.
	For the year ended December 31, 2014, we decreased our unrecognized tax benefits by $76.6 million (net of increases). The decrease primarily relates to the reduction of the prior year tax positions and expiration of applicable statute of limitations. The total amount of gross unrecognized tax benefits as of December 31, 2014, 2013 and 2012 were $29.2 million, $105.8 million and $100.7 million, respectively.
The following is a reconciliation of the gross unrecognized tax benefits:
Gross Unrecognized Tax Benefits as of January 1, 2012		$	120.1
Additions for Prior Years' Tax Positions		5.1
Additions for Current Years' Tax Positions		5.1
Addition due to CTA		0.3
Reduction in Prior Years' Tax Positions (1)		(28.7		)
Reduction Due to Expired Statute of Limitations		(1.2		)
Gross Unrecognized Tax Benefits as of December 31, 2012		100.7
Additions for Prior Years' Tax Positions		7.7
Additions for Current Years' Tax Positions		0.5
Settlements with Taxing Authority		(1.0		)
Reduction due to CTA		(0.5		)
Reduction in Prior Years' Tax Positions		(0.4		)
Reduction Due to Expired Statute of Limitations		(1.2		)
Gross Unrecognized Tax Benefits as of December 31, 2013		105.8
Additions for Prior Years' Tax Positions		2.1
Additions for Current Years' Tax Positions		1
Settlements with Taxing Authority		(4.0		)
Reduction due to CTA		(0.2		)
Reduction in Prior Years' Tax Positions (2)		(57.1		)
Reduction Due to Expired Statute of Limitations (3)		(18.4		)
Gross Unrecognized Tax Benefits as of December 31, 2014		$	29.2
-1	The decrease is primarily due to the release of reserves for uncertain tax positions due to the expiration of the statute of limitations for the 2005 - 2006 tax years.
-2	The decrease is primarily due to the release of reserves for uncertain tax positions due to the effective settlement of audits for the 2007 - 2009 tax years.
-3	The decrease is primarily due to the release of reserves due to the expiration of the statute of limitations for the 2010 tax year.
The amount of unrecognized tax benefits that, if recognized, would impact the effective tax rate is $27.3 million, net of tax benefits. At December 31, 2014, we anticipate that it is reasonably possible that total unrecognized tax benefits could decrease by approximately $22 million within the next 12 months as a result of audit settlements and the expiration of applicable statute of limitations.
We recognize accrued interest expense related to unrecognized tax benefits in the Provision for Income Taxes line in the consolidated statement of operations and other comprehensive income. The total amount of interest expense, net of tax benefits, recognized for the years ended December 31, 2014, 2013 and 2012 was $1.2 million, $2.5 million and $2.7 million, respectively. The total amount of accrued interest as of December 31, 2014 and 2013 was $3.4 million and $10.4 million, net of tax benefits, respectively.

Notes_Payable_and_Indebtedness

Notes Payable and Indebtedness	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Notes Payable and Indebtedness	Notes Payable and Indebtedness
	Our borrowings are summarized in the following table:
		December 31,
		2014		2013
	Debt Maturing Within One Year:
	Fixed-Rate Note (net of a $0.2 million discount as of December 31, 2014)	$	299.8	$	—
	Fair Value Adjustment Related to Hedged Debt	1.2		—
	Other	0.1		0.1
	Total Debt Maturing Within One Year	$	301.1	$	0.1
	Debt Maturing After One Year:
	Long-Term Fixed-Rate Notes (Net of a $2.3 million and $3.0 million discount as of December 31, 2014 and 2013, respectively)	$	747.7	$	1,047.00
	Fair Value Adjustment Related to Hedged Debt	—		2.5
	Credit Facility	604.5		466.5
	Total Debt Maturing After One Year	$	1,352.20	$	1,516.00
	Fixed-Rate Notes
	In December 2012, we issued senior notes with a face value of $450 million that mature on December 1, 2017 (the “2017 notes”), bearing interest at a fixed annual rate of 3.25%, payable semi-annually. In addition, in December 2012, we issued senior notes with a face value of $300 million that mature on December 1, 2022 (the “2022 notes”), bearing interest at a fixed annual rate of 4.375%, payable semi-annually. The proceeds were used in December 2012 to repay borrowings outstanding under our revolving credit facility and retire our then outstanding $400 million senior notes bearing interest at a fixed annual rate of 6.00%, which had a maturity date of April 2013 (the “2013 notes”). In connection with the redemption of the 2013 notes, we recorded a premium payment of $5.4 million to “Other Income (Expense) – Net” in the consolidated statement of operations and comprehensive income during the year ended December 31, 2012. The interest rates applicable to the 2017 notes and 2022 notes are subject to adjustment if our debt rating is decreased three levels below the Standard & Poor's and Fitch BBB+ credit ratings that we held on the date of issuance. After a rate adjustment, if our debt ratings are subsequently upgraded, the adjustment(s) would reverse. The maximum adjustment is 2.00% above the initial interest rate and the rate cannot adjust below the initial interest rates. As of December 31, 2014, no such adjustments to the interest rates were required. The 2017 notes and 2022 notes carrying amounts of $450.0 million and $297.7 million, net of less than $0.1 million and $2.3 million of remaining issuance discounts respectively, are recorded as “Long-Term Debt” in the consolidated balance sheet at December 31, 2014.
	The 2017 notes and 2022 notes were issued at discounts of less than $0.1 million and $2.9 million, respectively. In addition, in connection with the issuance, we incurred underwriting and other fees of approximately $3.4 million and $2.5 million for the 2017 notes and 2022 notes, respectively. These costs are being amortized over the life of the applicable notes. The 2017 notes and 2022 notes contain certain covenants that limit our ability to create liens, enter into sale and leaseback transactions and consolidate, merge or sell assets to another entity. We were in compliance with these non-financial covenants at December 31, 2014 and 2013. The 2017 notes and 2022 notes do not contain any financial covenants.
	On January 30, 2008, we entered into interest rate derivative transactions with an aggregate notional amount of $400 million. The objective of these hedges was to mitigate the variability of future cash flows from market changes in Treasury rates in anticipation of the issuance of the 2013 notes. These transactions were accounted for as cash flow hedges and, as such, changes in fair value of the hedges that took place through the date of the issuance of the 2013 notes were recorded in AOCI. In connection with the issuance of the 2013 notes, these interest rate derivative transactions were terminated, resulting in a loss and a payment of $8.5 million on March 28, 2008, the date of termination. The March 28, 2008 payment had been recorded in AOCI and has been amortized over the life of the 2013 notes. In connection with the redemption of the 2013 notes in December 2012, the remaining unamortized portion of the loss in the amount of $0.3 million was recorded to “Other Income (Expense) – Net” in the consolidated statement of operations and comprehensive income during the year ended December 31, 2012. In addition, with the redemption of the 2013 notes in December 2012, the remaining unamortized underwriting and other fees in the amount of $0.1 million were recorded to “Other Income (Expense) – Net” in the consolidated statement of operations and comprehensive income during the year ended December 31, 2012.
	In November 2010, we issued senior notes with a face value of $300 million that mature on November 15, 2015 (the “2015 notes”), bearing interest at a fixed annual rate of 2.875%, payable semi-annually. The proceeds were used in December 2010 to repay our then outstanding $300 million senior notes, bearing interest at a fixed annual rate of 5.50%, which had a maturity date of March 15, 2011 (the “2011 notes”). In connection with the redemption of the 2011 notes, we recorded a premium payment of $3.7 million to “Other Income (Expense) – Net” in the consolidated statement of operations and comprehensive income during the year ended December 31, 2011. The 2015 notes of $299.8 million, net of $0.2 million remaining discount, are recorded as “Short-Term Debt” in the consolidated balance sheet at December 31, 2014.
	The 2015 notes were issued at a discount of $1.1 million, and, in connection with the issuance, we incurred underwriting and other fees of approximately $2.5 million. These costs are being amortized over the life of the 2015 notes. The 2015 notes contain certain covenants that limit our ability to create liens, enter into sale and leaseback transactions and consolidate, merge or sell assets to another entity. We were in compliance with these non-financial covenants at December 31, 2014 and 2013. The 2015 notes do not contain any financial covenants.
	In November and December 2010, we entered into interest rate derivative transactions with aggregate notional amounts of $125 million. The objective of these hedges was to offset the change in fair value of the fixed rate 2015 notes attributable to changes in LIBOR. These transactions have been accounted for as fair value hedges. We have recognized the gain or loss on the derivative instruments, as well as the offsetting loss or gain on the hedged item, in “Other Income (Expense) – Net” in the consolidated statements of operations and comprehensive income.
	In March 2012, in connection with our objective to manage our exposure to interest rate changes and our policy to manage our fixed and floating interest rate debt mix, these interest rate derivatives discussed in the previous paragraph were terminated. This resulted in a gain of $0.3 million and the receipt of $5.0 million in cash on March 12, 2012, the swap termination settlement date. The gain of $0.3 million was recorded in “Other Income (Expense) – Net” in the consolidated statement of operations and comprehensive income during the year ended December 31, 2012.
	Approximately $0.8 million of derivative gains offset by a $0.5 million loss on the fair value adjustment related to the hedged debt were recorded through the date of termination in the results for the three months ended March 31, 2012. The $4.9 million adjustment in the carrying amount of the hedged debt at the date of termination is being amortized as an offset to “Interest Expense” in the consolidated statements of operations and comprehensive income over the remaining term of the 2015 notes. Approximately $1.3 million of amortization was recorded during the year ended December 31, 2014, resulting in a balance of $1.2 million in the consolidated balance sheet at December 31, 2014.
	Credit Facility
	On July 23, 2014, we amended and extended our then-existing $800 million revolving credit facility, increasing the facility amount to $1 billion and extending the maturity to July 2019. The $1 billion revolving credit facility was amended with commercial terms substantially similar to the then-existing $800 million revolving credit facility, with the same financial covenants, and at borrowing rates that reflect the prevailing market for companies of similar credit quality. The revolving credit facilities require the maintenance of interest coverage and total debt to Earnings Before Income Taxes, Depreciation and Amortization (“EBITDA”) ratios which are defined in the credit agreement. We were in compliance with the $1 billion revolving credit facility financial and non-financial covenants at December 31, 2014 and the then-existing $800 million revolving credit facility financial and non-financial covenants at December 31, 2013.
	At December 31, 2014 and 2013, we had $604.5 million and $466.5 million, respectively, of borrowings outstanding under the $1 billion and then-existing $800 million revolving credit facilities with weighted average interest rates of 1.38% and 1.24%, respectively. We borrowed under these facilities from time to time during the year ended December 31, 2014 to supplement the timing of receipts in order to fund our working capital. We have also borrowed under these facilities from time to time to fund a portion of our share repurchases. These facilities also supported our commercial paper program. Under this program, we may issue from time to time unsecured promissory notes in the commercial paper market in private placements exempt from registration under the Securities Act of 1933, as amended, for a cumulative face amount not to exceed $800 million outstanding at any one time and with maturities not exceeding 364 days from the date of issuance. Outstanding commercial paper would effectively reduce the amount available for borrowing under our revolving credit facilities. We did not borrow under our commercial paper program during the years ended December 31, 2014 and 2013.
	Other
	At December 31, 2014 and 2013, certain of our international operations had uncommitted lines of credit of $1.8 million and $2.6 million, respectively. There were no borrowings outstanding under these lines of credit at December 31, 2014 and 2013, respectively. These arrangements have no material facility fees and no compensating balance requirements.
	At December 31, 2014 and 2013, we were contingently liable under open standby letters of credit and bank guarantees issued by our banks in favor of third parties and parent guarantees in favor of certain of our banks totaling $4.6 million and $4.7 million, respectively.
	Interest paid for all outstanding debt totaled $42.5 million, $39.9 million and $41.8 million during the years ended December 31, 2014, 2013 and 2012, respectively.

Financial_Instruments

Financial Instruments	12 Months Ended
	Dec. 31, 2014
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Financial Instruments	Financial Instruments
	We employ established policies and procedures to manage our exposure to changes in interest rates and foreign currencies. We use foreign exchange forward contracts to hedge short-term foreign currency denominated loans and certain third-party and intercompany transactions. We may also use foreign exchange forward contracts to hedge our net investments in our foreign subsidiaries. In addition, we may use interest rate derivatives to hedge a portion of the interest rate exposure on our outstanding debt or in anticipation of a future debt issuance, as discussed under “Interest Rate Risk Management” below.
	We do not use derivative financial instruments for trading or speculative purposes. If a hedging instrument ceases to qualify as a hedge in accordance with hedge accounting guidelines, any subsequent gains and losses are recognized currently in income. Collateral is generally not required for these types of instruments.
	By their nature, all such instruments involve risk, including the credit risk of non-performance by counterparties. However, at December 31, 2014 and 2013, there was no significant risk of loss in the event of non-performance of the counterparties to these financial instruments. We control our exposure to credit risk through monitoring procedures.
	Our trade receivables do not represent a significant concentration of credit risk at December 31, 2014 and 2013, because we sell to a large number of customers in different geographical locations and industries.
	Interest Rate Risk Management
	Our objective in managing our exposure to interest rates is to limit the impact of interest rate changes on our earnings, cash flows and financial position, and to lower our overall borrowing costs. To achieve these objectives, we maintain a policy that floating-rate debt be managed within a minimum and maximum range of our total debt exposure. To manage our exposure and limit volatility, we may use fixed-rate debt, floating-rate debt and/or interest rate swaps. We recognize all derivative instruments as either assets or liabilities at fair value in the statement of financial position. As of December 31, 2014, we did not have any interest rate derivatives outstanding.
	Fair Value Hedges
	For interest rate derivative instruments that are designated and qualify as a fair value hedge, we assess quarterly whether the interest rate swaps are highly effective in offsetting changes in the fair value of the hedged debt. Changes in fair values of interest rate swap agreements that are designated fair value hedges are recognized in earnings as an adjustment of “Other Income (Expense) – Net” in the consolidated statements of operations and comprehensive income. The effectiveness of the hedge is monitored on an ongoing basis for hedge accounting purposes, and if the hedge is considered ineffective, we discontinue hedge accounting prospectively.
	In November 2010, we issued senior notes with a face value of $300 million that mature on November 15, 2015 (the “2015 notes”). In November and December 2010, we entered into interest rate derivative transactions with aggregate notional amounts of $125 million. The objective of these hedges was to offset the change in fair value of the fixed rate 2015 notes attributable to changes in LIBOR. These transactions have been accounted for as fair value hedges. We have recognized the gain or loss on the derivative instruments, as well as the offsetting loss or gain on the hedged item, in “Other Income (Expense) – Net” in the consolidated statements of operations and comprehensive income.
	In March 2012, in connection with our objective to manage our exposure to interest rate changes and our policy to manage our fixed and floating interest rate debt mix, the interest rate derivatives discussed in the previous paragraph were terminated. This resulted in a gain of $0.3 million and the receipt of $5.0 million in cash on March 12, 2012, the swap termination settlement date. The gain of $0.3 million was recorded in “Other Income (Expense) – Net” in the consolidated statement of operations and comprehensive income during the year ended December 31, 2012.
	Approximately $0.8 million of derivative gains offset by a $0.5 million loss on the fair value adjustment related to the hedged debt were recorded through the date of termination in the results for the three months ended March 31, 2012. The $4.9 million adjustment in the carrying amount of the hedged debt at the date of termination will be amortized as an offset to “Interest Expense” in the consolidated statements of operations and comprehensive income over the remaining term of the 2015 notes. Approximately $1.3 million of amortization was recorded from the swap termination date through December 31, 2014, resulting in a balance of $1.2 million in the consolidated balance sheet at December 31, 2014.
	Cash Flow Hedges
	For interest rate derivative instruments that are designated and qualify as a cash flow hedge, the effective portion of the periodic hedge remeasurement gains or losses on the derivative are reported as a component of other comprehensive income (“OCI”) and reclassified to earnings in the same period or periods during which the hedged transaction affects earnings. Gains and losses on the derivative representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness are recognized in current earnings.
	On January 30, 2008, we entered into interest rate derivative transactions with an aggregate notional amount of $400 million. The objective of these hedges was to mitigate the variability of future cash flows from market changes in Treasury rates in anticipation of the issuance of the 2013 notes. These transactions were accounted for as cash flow hedges and, as such, changes in fair value of the hedges that took place through the date of the issuance of the 2013 notes were recorded in AOCI. In connection with the issuance of the 2013 notes, these interest rate derivative transactions were terminated, resulting in a loss and a payment of $8.5 million on March 28, 2008, the date of termination. The March 28, 2008 payment had been recorded in AOCI and has been amortized over the life of the 2013 notes. In connection with the redemption of the 2013 notes in December 2012, the remaining unamortized portion of the loss in the amount of $0.3 million was recorded to “Other Income (Expense) – Net” in the consolidated statement of operations and comprehensive income during the year ended December 31, 2012. In addition, with the redemption of the 2013 notes in December 2012, the remaining unamortized underwriting and other fees in the amount of $0.1 million was recorded to “Other Income (Expense) – Net” in the consolidated statement of operations and comprehensive income during the year ended December 31, 2012.
	Foreign Exchange Risk Management
	Our objective in managing exposure to foreign currency fluctuations is to reduce the volatility caused by foreign exchange rate changes on the earnings, cash flows and financial position of our international operations. We follow a policy of hedging balance sheet positions denominated in currencies other than the functional currency applicable to each of our various subsidiaries. In addition, we are subject to foreign exchange risk associated with our international earnings and net investments in our foreign subsidiaries. We use short-term, foreign exchange forward and option contracts to execute our hedging strategies. Typically, these contracts have maturities of 12 months or less. These contracts are denominated primarily in the British pound sterling, the Euro and Canadian dollar. The gains and losses on the forward contracts associated with the balance sheet positions are recorded in “Other Income (Expense) – Net” in the consolidated statements of operations and comprehensive income and are essentially offset by the losses and gains on the underlying foreign currency transactions.
	As in prior years, we have hedged substantially all balance sheet positions denominated in a currency other than the functional currency applicable to each of our various subsidiaries with short-term, foreign exchange forward contracts. In addition, we may use foreign exchange forward contracts to hedge certain net investment positions. The underlying transactions and the corresponding foreign exchange forward are marked-to-market at the end of each quarter and the fair value impacts are reflected within the consolidated financial statements.
	As of December 31, 2014 and 2013, the notional amounts of our foreign exchange forward contracts were $296.4 million and $295.4 million, respectively.
	Realized gains and losses associated with these contracts were $15.1 million and $23.0 million, respectively, at December 31, 2014; $17.5 million and $24.7 million, respectively, at December 31, 2013; and $20.4 million and $14.3 million, respectively, at December 31, 2012. Unrealized gains and losses associated with these contracts were $0.4 million and $0.1 million, respectively, at December 31, 2014; $0.4 million and $0.4 million, respectively, at December 31, 2013; and less than $0.1 million and $0.4 million, respectively, at December 31, 2012.
	Fair Values of Derivative Instruments in the Consolidated Balance Sheets
		Asset Derivatives												Liability Derivatives
		31-Dec-14						31-Dec-13						31-Dec-14					31-Dec-13
		Balance Sheet		Fair Value				Balance Sheet		Fair Value				Balance Sheet		Fair Value			Balance Sheet		Fair Value
		Location						Location						Location					Location
	Derivatives not designated as hedging instruments
	Foreign exchange forward contracts	Other Current		$	0.4			Other Current		$	0.4			Other Accrued &		$	0.1		Other Accrued &		$	0.4
		Assets						Assets						Current Liabilities					Current Liabilities
	Total derivatives not designated as hedging instruments			$	0.4					$	0.4					$	0.1				$	0.4
	Total Derivatives			$	0.4					$	0.4					$	0.1				$	0.4
	The Effect of Derivative Instruments on the Consolidated Statements of Operations and Comprehensive Income
			Gain (Loss) Recognized in Income on Derivatives
		Derivatives in Fair	Location		For the Year Ended December 31,												Hedged Item	Location		For the Year Ended December 31,
		Value Hedging
		Relationships
					2014				2013				2012							2014			2013		2012
		Interest rate contracts	Non-Operating		$	—			$	—			$	0.8			Fixed-	Non-Operating		$	—		$	—	$	(0.5	)
			Income (Expenses)														rate	Income (Expenses)
			– Net														debt	– Net
	Our foreign exchange forward contracts are not designated as hedging instruments under authoritative guidance.
	The Effect of Derivative Instruments on the Consolidated Statements of Operations and Comprehensive Income
	Derivatives not Designated as Hedging	Location of Gain (Loss) Recognized in		Amount of Gain (Loss) Recognized in Income on Derivatives
	Instruments	Income on Derivatives
				For the Year Ended December 31,
				2014				2013				2012
	Foreign exchange forward contracts	Non-Operating Income (Expenses) – Net		$	(7.6	)		$	(6.8	)		$	5.7
	Foreign exchange option contracts	Non-Operating Income (Expenses) – Net		$	—			$	—			$	(0.2	)
	Fair Value of Financial Instruments
	Our financial assets and liabilities that are reflected in the consolidated financial statements include derivative financial instruments, cash and cash equivalents, accounts receivable, other receivables, accounts payable, short-term borrowings and long-term borrowings. We use short-term foreign exchange forward contracts to hedge short-term foreign currency-denominated intercompany loans and certain third-party and intercompany transactions. Fair value for derivative financial instruments is determined utilizing a market approach.
	We have a process for determining fair values. Fair value is based upon quoted market prices, where available. If listed prices or quotes are not available, we use quotes from independent pricing vendors based on recent trading activity and other relevant information including market interest rate curves and referenced credit spreads.
	In addition to utilizing external valuations, we conduct our own internal assessment of the reasonableness of the external valuations by utilizing a variety of valuation techniques including Black-Scholes option pricing and discounted cash flow models that are consistently applied. Inputs to these models include observable market data, such as yield curves, and foreign exchange rates where applicable. Our assessments are designed to identify prices that do not accurately reflect the current market environment, those that have changed significantly from prior valuations and other anomalies that may indicate that a price may not be accurate. We also follow established routines for reviewing and reconfirming valuations with the pricing provider, if deemed appropriate. In addition, the pricing provider has an established challenge process in place for all valuations, which facilitates identification and resolution of potentially erroneous prices. Valuation adjustments may be made to ensure that financial instruments are recorded at fair value. These adjustments include amounts to reflect counterparty credit quality and our own creditworthiness and constraints on liquidity. For inactive markets that do not have observable pricing or sufficient trading volumes, or for positions that are subject to transfer restrictions, valuations are adjusted to reflect illiquidity and/or non-transferability. Such adjustments are generally based on available market evidence. In the absence of such evidence, management’s best estimate will be used.
	The methods described above may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, while we believe our valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different estimate of fair value at the reporting date.
	The following table presents information about our assets and liabilities measured at fair value on a recurring basis as of December 31, 2014 and December 31, 2013, and indicates the fair value hierarchy of the valuation techniques utilized by us to determine such fair value. Level inputs, as defined by authoritative guidance, are as follows:
	Level Input		Input Definition
	Level I		Observable inputs utilizing quoted prices (unadjusted) for identical assets or liabilities in active markets at the measurement date.
	Level II		Inputs other than quoted prices included in Level I that are either directly or indirectly observable for the asset or liability through corroboration with market data at the measurement date.
	Level III		Unobservable inputs for the asset or liability in which little or no market data exists, therefore requiring management’s best estimate of what market participants would use in pricing the asset or liability at the measurement date.
	In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, the level in the fair value hierarchy within which the fair value measurement in its entirety falls has been determined based on the lowest level input that is significant to the fair value measurement in its entirety. Our assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the asset or liability.
	The following table summarizes fair value measurements by level at December 31, 2014 for assets and liabilities measured at fair value on a recurring basis:
		Quoted Prices in				Significant Other				Significant				Balance at December 31, 2014
		Active Markets				Observable				Unobservable
		for Identical				Inputs (Level II)				Inputs
		Assets (Level I)								(Level III)
	Assets:
Cash Equivalents (1)	$	126.1			$	—			$	—			$	126.1
Other Current Assets:
Foreign Exchange Forwards (2)	$	—			$	0.4			$	—			$	0.4
Liabilities:
Other Accrued and Current Liabilities:
Foreign Exchange Forwards (2)	$	—			$	0.1			$	—			$	0.1
-1	Cash equivalents represent fair value as it consists of highly liquid investments with an original maturity of three months or less.
-2	Primarily represents foreign currency forward contracts. Fair value is determined utilizing a market approach and considers a factor for nonperformance in the valuation.
The following table summarizes fair value measurements by level at December 31, 2013 for assets and liabilities measured at fair value on a recurring basis:
	Quoted Prices in				Significant Other				Significant				Balance at December 31, 2013
	Active Markets				Observable				Unobservable
	for Identical				Inputs (Level II)				Inputs
	Assets (Level I)								(Level III)
Assets:
Cash Equivalents (1)	$	95.9			$	—			$	—			$	95.9
Other Current Assets:
Foreign Exchange Forwards (2)	$	—			$	0.4			$	—			$	0.4
Liabilities:
Other Accrued and Current Liabilities:
Foreign Exchange Forwards (2)	$	—			$	0.4			$	—			$	0.4
-1	Cash equivalents represent fair value as it consists of highly liquid investments with an original maturity of three months or less.
-2	Primarily represents foreign currency forward contracts. Fair value is determined utilizing a market approach and considers a factor for nonperformance in the valuation.
At December 31, 2014 and 2013, the fair value of cash and cash equivalents, accounts receivable, other receivables and accounts payable approximated carrying value due to the short-term nature of these instruments. The estimated fair values of other financial instruments subject to fair value disclosures, determined based on valuation models using discounted cash flow methodologies with market data inputs from globally recognized data providers and third-party quotes from major financial institutions (categorized as Level II in the fair value hierarchy), are as follows:
	Balance at December 31,
	2014								2013
	Carrying				Fair Value				Carrying				Fair Value
	Amount (Asset)				(Asset) Liability				Amount (Asset)				(Asset) Liability
	Liability								Liability
Short-term and Long-term Debt	$	1,047.50			$	1,082.10			$	1,047.00			$	1,054.80
Credit Facilities	$	604.5			$	625.4			$	466.5			$	466.1
Items Measured at Fair Value on a Nonrecurring Basis
In addition to assets and liabilities that are recorded at fair value on a recurring basis, we are required to record assets and liabilities at fair value on a nonrecurring basis as required by GAAP. Generally, assets are recorded at fair value on a nonrecurring basis as a result of impairment charges.
During the third quarter of 2014, we recorded an impairment charge of $7.3 million related to our facility in Parsippany, New Jersey resulting from the decision to exit this facility. At that time, the expected sales price was approximately $8.5 million. We performed an assessment on the recoverability of the asset group in accordance with ASC 360-10-35 “Property, Plant and Equipment.” Comparison of the expected cash flows from the then expected sale and the carrying value of the asset group indicated that the carrying amount of the asset group was not expected to be fully recoverable. Furthermore, the carrying value of the asset group was written down to its fair value. The fair value of the asset group was based on the quoted market price, which is considered a Level II input. The impairment charge was included in “Operating Costs” in our North America reporting segment. Below is a summary of the components of the asset group and its carrying value as of September 30, 2014:
		Carrying Value
Building and Building Improvements		$	9.9
Land		4.7
Furniture and Fixtures		0.3
Machinery and Equipment		0.4
Total		$	15.3
In December 2014, we entered into a sale arrangement for $8.5 million for this property pursuant to which our employees will continue to utilize this space until they can be relocated to our newly leased location at 101 JFK Parkway in Short Hills, New Jersey. It is expected that such actions will be completed no later than December 31, 2015. We have ceased to depreciate the above asset group since the third quarter of 2014. The asset group was reported as “Current Assets Held for Sale” in our consolidated balance sheet as of December 31, 2014.
During the fourth quarter of 2013, we recorded an impairment charge of $31.3 million primarily related to technology and software assets that were primarily related to our data management infrastructure (data supply chain) in our North America segment. We can improve data collection through other commercially available means, as needed. We determined that the fair value of these assets was zero based on Level III inputs (see “Fair Value of Financial Instruments” above for discussion on Level inputs), as market data was not readily available. Of the $31.3 million impairment charge, $28.6 million was included in “Operating Costs” and $2.7 million was included in “Selling and Administrative Expenses” in our North America segment.
During the fourth quarter of 2013, we also recorded an impairment charge of $1.7 million related to our Portal asset resulting from lower than expected product revenue. We decided to sunset the Portal product and migrate our existing Portal customers to an enhanced version of our existing DUNS Registered Seal product. We determined that the fair value of these assets was zero based on Level III inputs (see “Fair Value of Financial Instruments” above for discussion on Level inputs) as market data was not readily available. The impairment charge was included in “Operating Costs” in our Asia Pacific segment.
During the first quarter of 2012, we recorded an impairment charge of $12.9 million related to the accounts receivable, intangible assets, prepaid costs and software for Roadway, an operation in our Greater China reporting unit. See Note 13 to the consolidated financial statements included in this Annual Report on Form 10-K for further discussion. We determined that the fair value of intangible assets, prepaid costs and software was zero based on Level III inputs (see “Fair Value of Financial Instruments” above for discussion on Level inputs), as market data of these assets were not readily available. We wrote down the accounts receivable balance to its realizable value based on the probability of collecting from the customer accounts. Of the $12.9 million charge, $4.1 million was included in “Operating Costs” and $8.8 million was included in “Selling and Administrative Expenses” in our Asia Pacific segment.

Capital_Stock

Capital Stock	12 Months Ended
	Dec. 31, 2014
Equity [Abstract]
Capital Stock	Capital Stock
	The total number of shares of all classes of stock that we have authority to issue under our Certificate of Incorporation is 220,000,000 shares, of which 200,000,000 shares, par value $0.01 per share, represent Common Stock (the “Common Stock”); 10,000,000 shares, par value $0.01 per share, represent Preferred Stock (the “Preferred Stock”); and 10,000,000 shares, par value $0.01 per share, represent Series Common Stock (the “Series Common Stock”). The Preferred Stock and the Series Common Stock can be issued with varying terms, as determined by our Board of Directors. Our Board of Directors has designated 500,000 shares of the Preferred Stock as Series A Junior Participating Preferred Stock, par value $0.01 per share, and 1,400,000 shares of the Preferred Stock as Series B Preferred Stock, par value $0.01 per share.
	Preferred Stock Issuance
	On February 24, 2009, we authorized 1,400,000 shares of 4.0% Series B Preferred Stock (“Series B Preferred Stock”) and issued 1,345,757 of such shares to a wholly-owned subsidiary in an intercompany transaction in exchange for $1.2 billion of outstanding intercompany debt. This transaction was eliminated in the consolidation. This transaction was undertaken in connection with worldwide legal entity simplification. The Series B Preferred Stock was issued pursuant to an exemption from registration under Section 4(2) of the Securities Act of 1933, as amended. The terms of the Series B Preferred Stock were set forth in a Certificate of Designation amending our Certificate of Incorporation effective as of February 24, 2009.

Earnings_Per_Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share
	We assess if any of our share-based payment transactions are deemed participating securities prior to vesting and therefore need to be included in the earnings allocation when computing EPS under the two-class method. The two-class method requires earnings to be allocated between common shareholders and holders of participating securities. All outstanding unvested share-based payment awards that contain non-forfeitable rights to dividends are considered to be a separate class of common stock and should be included in the calculation of basic and diluted EPS. Based on a review of our stock-based awards, we have determined that only our restricted stock awards are deemed participating securities. We did not have any weighted average restricted shares outstanding for the years ended December 31, 2014 and 2013, respectively. The weighted average restricted shares outstanding were 11,658 shares for the year ended December 31, 2012.
	We are required to include in our computation of diluted EPS any contingently issuable shares that have satisfied all the necessary conditions by the end of the reporting period or would have satisfied all necessary conditions if the end of the reporting period was the end of the performance period. Contingently issuable shares are shares that issuance is contingent upon the satisfaction of certain conditions other than just services. Beginning in 2013, we granted certain employees target awards of performance-based restricted stock units, in the form of leveraged restricted stock units or performance units. As the actual number of Dun & Bradstreet common shares ultimately received by the employee can range from zero to 200% of the target award depending on the Company’s actual performance against the pre-establish market conditions or performance conditions, these awards are considered contingently issuable shares.
		For the Years Ended December 31,
		2014			2013		2012
	Net Income Attributable to Dun & Bradstreet	$	294.4		$	258.5	$	295.5
	Less: Allocation to Participating Securities	—			—		(0.1		)
	Net Income Attributable to Dun & Bradstreet Common Shareholders – Basic and Diluted	$	294.4		$	258.5	$	295.4
	Weighted Average Number of Shares Outstanding – Basic	36.5			39.1		45.6
	Dilutive Effect of Our Stock Incentive Plans	0.4			0.4		0.4
	Weighted Average Number of Shares Outstanding – Diluted	36.9			39.5		46
	Basic Earnings Per Share of Common Stock Attributable to Dun & Bradstreet Common Shareholders	$	8.06		$	6.61	$	6.47
	Diluted Earnings Per Share of Common Stock Attributable to Dun & Bradstreet Common Shareholders	$	7.99		$	6.54	$	6.43
	Stock-based awards (including contingently issuable shares) to acquire 19,320 shares, 99,154 shares and 1,345,796 shares of common stock were outstanding at December 31, 2014, 2013 and 2012, respectively, but were not included in the computation of diluted earnings per share because the assumed proceeds, as calculated under the treasury stock method, resulted in these awards being anti-dilutive. Our options generally expire ten years from the grant date and our stock awards vest generally within three to five years.
	Our share repurchases were as follows:
			For the Years Ended December 31,
	Program		2014				2013					2012
			Shares		$ Amount		Shares			$ Amount		Shares		$ Amount
	Share Repurchase Programs		1,570,326	(a)	$	165	3,545,513		(a)	$	325	6,483,144	(a)	$	480.1
	Repurchases to Mitigate the Dilutive Effect of the Shares Issued Under Our Stock Incentive Plans and Employee Stock Purchase Plan (“ESPP”)		541,326	(b)	60		962,686		(b)	95		354,046	(b)	27.9
	Total Repurchases		2,111,652		$	225	4,508,199			$	420	6,837,190		$	508
	(a)	In August 2012, our Board of Directors approved a $500 million increase to our then-existing $500 million share repurchase program, for a total program authorization of $1 billion. The then-existing $500 million share purchase program was approved by our Board of Directors in October 2011 and commenced in November 2011 upon completion of the previous $200 million share repurchase program. This program was completed in August 2014.
	(b)	In May 2010, our Board of Directors approved a four-year, five million share repurchase program to mitigate the dilutive effect of the shares issued under our stock incentive plans and ESPP. This program commenced in October 2010 and expired in October 2014. Of the 5,000,000 shares that were authorized for repurchase under this program, 2,682,492 shares were repurchased at the time this program expired in October 2014.
	In August 2014, our Board of Directors approved a new $100 million share repurchase program to mitigate the dilutive effect of shares issued under our stock incentive plans and Employee Stock Purchase Program, and to be used for discretionary share repurchases from time to time.  Use of the new $100 million share repurchase program for anti-dilutive share repurchases was authorized to commence upon the completion or expiration of our four-year, five million share anti-dilutive share repurchase program which expired in October 2014. Any use for discretionary share repurchases was authorized to commence upon the completion of our $1 billion discretionary share repurchase program which was completed in August 2014. The new $100 million share repurchase program will remain open until it has been fully utilized. There is currently no definitive timeline under which the program will be completed. As of December 31, 2014, we had not yet commenced share repurchases under this program.

Pension_and_Postretirement_Ben

Pension and Postretirement Benefits	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Pension and Postretirement Benefits	Pension and Postretirement Benefits
	Through June 30, 2007, we offered coverage to substantially all of our U.S. based employees under a defined benefit plan called The Dun & Bradstreet Corporation Retirement Account (“U.S. Qualified Plan”). The U.S. Qualified Plan covered active and retired employees. The benefits to be paid upon retirement are based on a percentage of the employee’s annual compensation. The percentage of compensation allocated annually to a retirement account ranged from 3% to 12.5% based on age and service. Amounts allocated under the U.S. Qualified Plan also receive interest credits based on the 30-year Treasury rate or equivalent rate published by the Internal Revenue Service. Pension costs are determined actuarially and funded in accordance with the Internal Revenue Code.
	We also maintain supplemental and excess plans in the United States (“U.S. Non-Qualified Plans”) to provide additional retirement benefits to certain key employees of the Company. These plans are unfunded, pay-as-you-go plans. The U.S. Qualified Plan and the U.S. Non-Qualified Plans account for approximately 71% and 14% of our pension obligation, respectively, at December 31, 2014.
	Effective June 30, 2007, we amended the U.S. Qualified Plan and one of the U.S. Non-Qualified Plans, known as the U.S. Pension Benefit Equalization Plan (the “PBEP”). Any pension benefit that had been accrued through such date under the two plans was “frozen” at its then current value and no additional benefits, other than interest on such amounts, will accrue under the U.S. Qualified Plan and the PBEP. Our employees in certain of our international operations are also provided with retirement benefits through defined benefit plans, representing the remaining balance of our pension obligations.
	We also provide various health care benefits for retirees. U.S. based employees, hired before January 1, 2004, who retire with ten years of vesting service after age 45, are eligible to receive benefits. Postretirement benefit costs and obligations are determined actuarially. During the first quarter of 2010, we eliminated company-paid life insurance benefits for retirees and modified our sharing of the Retiree Drug Subsidy that retirees were projected to receive. Effective July 1, 2010, we elected to convert the then current prescription drug program for retirees over 65 to a group-based company sponsored Medicare Part D program, or Employer Group Waiver Plan (“EGWP”). Under this change, we started, in 2013, to use the Part D subsidies delivered through the EGWP each year to reduce net company retiree medical costs until net company costs were completely eliminated. The Part D subsidies would be shared with retirees going forward to reduce retiree contributions. In July 2014, we amended our post-65 retiree health plan to eliminate our group-based retiree medical and prescription plans effective December 31, 2014. Effective January 1, 2015, we provide eligible retirees and dependents age 65 or older access to coverage in the individual Medicare market. Dun &Bradstreet will also provide an annual contribution towards retirees’ premiums and other out-of-pocket costs.
	Certain of our non-U.S. based employees receive postretirement benefits through government-sponsored or administered programs.
	We use an annual measurement date of December 31 for our U.S. and Canada plans and November 30 for other non-U.S. plans.
	Benefit Obligation and Plan Assets
	The following table sets forth the changes in our benefit obligations and plan assets for our pension and postretirement plans. The table also presents the line items in the consolidated balance sheets where the related assets and liabilities are recorded:
			Pension Plans								Postretirement Benefits
			2014				2013				2014				2013
	Change in Benefit Obligation:
	Benefit Obligation at January 1		$	(1,827.6	)		$	(1,972.1	)		$	(27.4	)		$	(27.0	)
	Service Cost		(3.5		)		(4.8		)		(0.8		)		(0.8		)
	Interest Cost		(78.9		)		(70.2		)		(0.7		)		(0.7		)
	Benefits Paid		100.2				97.9				16.9				15.1
	Direct Subsidies Received		—				—				(4.3		)		(2.0		)
	Impact of Curtailment/Settlement		0.2				—				—				—
	Plan Participant Contributions		(0.3		)		(0.4		)		(8.7		)		(10.1		)
	Actuarial (Loss) Gain		(10.6		)		(3.3		)		—				(0.1		)
	Plan Amendment		0.1				—				4.9				—
	Assumption Change		(285.5		)		127.4				(1.2		)		(1.8		)
	Effect of Changes in Foreign Currency Exchange Rates		12.5				(2.1		)		—				—
	Benefit Obligation at December 31		$	(2,093.4	)		$	(1,827.6	)		$	(21.3	)		$	(27.4	)
	Change in Plan Assets:
	Fair Value of Plan Assets at January 1		$	1,451.70			$	1,318.80			$	—			$	—
	Actual Return on Plan Assets		139.2				178.1				—				—
	Employer Contributions		37.2				51.2				3.9				3
	Direct Subsidies Received		—				—				4.3				2
	Plan Participant Contributions		0.3				0.4				8.7				10.1
	Settlement		(0.2		)		—				—				—
	Benefits Paid		(100.2		)		(97.9		)		(16.9		)		(15.1		)
	Effect of Changes in Foreign Currency Exchange Rates		(11.1		)		1.1				—				—
	Fair Value of Plan Assets at December 31		$	1,516.90			$	1,451.70			$	—			$	—
	Funded Status of Plan		$	(576.5	)		$	(375.9	)		$	(21.3	)		$	(27.4	)
			Pension Plans								Postretirement Benefits
			At December 31,
			2014				2013				2014				2013
	Amounts Recorded in the Consolidated Balance Sheets:
	Prepaid Pension Costs		$	1.8			$	3.4			$	—			$	—
	Pension and Postretirement Benefits		(561.0		)		(362.9		)		(18.6		)		(23.1		)
	Accrued Payroll		(17.3		)		(16.4		)		(2.7		)		(4.3		)
	Net Amount Recognized		$	(576.5	)		$	(375.9	)		$	(21.3	)		$	(27.4	)
	Accumulated Benefit Obligation		$	2,080.40			$	1,814.50			N/A				N/A
	Amount Recognized in Accumulated Other Comprehensive Income Consists of:
	Actuarial Loss (Gain)		$	1,141.30			$	920.3			$	(9.4	)		$	(11.6	)
	Prior Service Cost (Credit)		5.1				5.5				(4.1		)		(1.6		)
	Total Amount Recognized - Pretax		$	1,146.40			$	925.8			$	(13.5	)		$	(13.2	)
	Grantor Trusts are used to fund the U.S. Non-Qualified Plans. At December 31, 2014 and 2013, the balances in these trusts were $13.1 million and $13.3 million, respectively, and are included as components of “Other Non-Current Assets” in the consolidated balance sheets.
	As of December 31, 2014 and 2013, our pension plans had an aggregate of $1,141.3 million and $920.3 million, respectively, of actuarial losses that have not yet been included in the net periodic benefit cost. These losses represent the cumulative effect of demographic and investment experience, as well as assumption changes that have been made in measuring the plans’ liabilities. The deferred asset gain or loss is not yet reflected in the market-related value of plan assets and is excluded in determining the loss amortization. At December 31, 2014 and 2013, our pension plans had $75.1 million and $59.9 million of deferred asset gains, respectively, which were excluded from determining the gain or loss amortization. The remaining gain or loss, to the extent it exceeds the greater of 10% of the projected benefit obligation or market-related value of plan assets, will be amortized into expense each year on a straight-line and plan-by-plan basis, over the remaining expected future working lifetime of active participants or the average remaining life expectancy of the participants if all or almost all of the plan participants are inactive. Currently, the amortization periods range from eight to 25 years for the U.S. plans and seven to 37 years for the non-U.S. plans. For our U.S. Qualified Plan and for certain of our non-U.S. plans, the amortization periods are the average life expectancy of all plan participants. This is as a result of almost all plan participants being deemed inactive. The postretirement benefit plan had $9.4 million and $11.6 million of actuarial gains as of December 31, 2014 and 2013, respectively. The actuarial gains will be amortized into expense in the same manner as described above. The amortization period is approximately eight years.
	Underfunded or Unfunded Accumulated Benefit Obligations
	At December 31, 2014 and 2013, our underfunded or unfunded accumulated benefit obligation and the related projected benefit obligation are as follows:
			2014				2013
	Accumulated Benefit Obligation		$	2,056.10			$	1,793.20
	Fair Value of Plan Assets		1,488.80				1,425.00
	Unfunded Accumulated Benefit Obligation		$	567.3			$	368.2
	Projected Benefit Obligation		$	2,067.20			$	1,804.40
	The underfunded or unfunded accumulated benefit obligations at December 31, 2014 consisted of $547.3 million and $20.0 million related to our U.S. plans (including Qualified and non-Qualified Plans) and non-U.S. defined benefit plans, respectively. The underfunded or unfunded accumulated benefit obligations at December 31, 2013 consisted of $329.6 million and $38.6 million related to our U.S. plans (including Qualified and non-Qualified Plans) and non-U.S. defined benefit plans, respectively.
	Net Periodic Pension Cost
	The following table sets forth the components of net periodic cost associated with our pension plans and our postretirement benefit obligations:
		Pension Plans												Postretirement Benefit Obligations
		For the Years Ended December 31,
		2014				2013				2012				2014				2013			2012
	Components of Net Periodic Cost (Income):
Service Cost	$	3.5			$	4.8			$	5.9			$	0.8			$	0.8		$	0.8
Interest Cost	78.9				70.2				75.2				0.7				0.7			0.6
Expected Return on Plan Assets	(100.2		)		(94.1		)		(99.3		)		—				—			—
Amortization of Prior Service Cost (Credit)	0.3				0.3				0.3				(2.4		)		(9.2		)	(9.9		)
Recognized Actuarial Loss (Gain)	36.1				43.7				35.6				(1.1		)		(1.4		)	(2.5		)
Curtailment Charge	0.1				—				—				—				—			—
Net Periodic Cost (Income)	$	18.7			$	24.9			$	17.7			$	(2.0	)		$	(9.1	)	$	(11.0	)
The following table sets forth other changes in plan assets and benefit obligations recognized in Other Comprehensive Income:
		Pension Plans								Postretirement Benefits
		At December 31,
		2014				2013				2014				2013
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Amortization of Actuarial (Loss) Gain, Before Tax (Income) Expense of $13.3 in 2014 and $15.8 in 2013		$	(36.1	)		$	(43.7	)		$	1.1			$	1.4
Amortization of Prior Service (Cost) Credit, Before Tax (Income) Expense of $(0.8) in 2014 and $(3.3) in 2013		$	(0.3	)		$	(0.3	)		$	2.4			$	9.2
Actuarial (Loss) Gain Arising During the Year, Before Tax (Income) Expense of $(98.2) in 2014 and $75.9 in 2013		$	(257.1	)		$	207.6			$	(1.1	)		$	(4.0	)
Prior Service Credit (Cost) Arising During the Year, Before Tax Expense (Income) of $1.9 in 2014 and $0.0 in 2013		$	0.1			$	0.1			$	4.9			$	—
The following table sets forth estimated 2015 amortization from AOCI:
						Postretirement Benefits
		Pension Plans
Estimated 2015 amortization from Accumulated Other Comprehensive Income
Actuarial Loss (Gain)		$	43.1			$	(0.9	)
Prior Service Cost (Credit)		0.2				(1.6		)
Total		$	43.3			$	(2.5	)
We apply our long-term expected rate of return assumption to the market-related value of assets to calculate the expected return on plan assets, which is a major component of our annual net periodic pension expense. The market-related value of assets recognizes short-term fluctuations in the fair value of assets over a period of five years, using a straight-line amortization basis. The methodology has been utilized to reduce the effect of short-term market fluctuations on the net periodic pension cost. Since the market-related value of assets recognizes gains or losses over a five-year period, the future value of assets will be impacted as previously deferred gains or losses are amortized. At December 31, 2014 and 2013, the market-related value of assets of our pension plans was $1,441.8 million and $1,391.8 million, respectively, compared with the fair value of the plan assets of $1,516.9 million and $1,451.7 million, respectively.
The following table sets forth the assumptions we used to determine our pension plan and postretirement benefit plan obligations for December 31, 2014 and 2013:
		Pension Plans						Postretirement Benefits
		2014			2013			2014			2013
Weighted Average Discount Rate		3.62	%		4.43	%		2.95	%		3.18	%
Weighted Average Rate of Compensation Increase		5.99	%		5.95	%		N/A			N/A
Cash Balance Account Interest Crediting Rate (1)		4.45%/3.04%			4.45%/3.8%			N/A			N/A
Cash Balance Account Conversion Rate (1)		1.40%/3.88%/4.96%			1.19%/4.53%/5.66%			N/A			N/A
(1) Only applicable to the U.S. Plans.
The following table sets forth the assumptions we used to determine net periodic benefit cost for the years ended December 31, 2014, 2013 and 2012:
		Pension Plans									Postretirement Benefits
		2014			2013			2012			2014			2013			2012
Weighted Average Discount Rate		4.41	%		3.71	%		4.3	%		3.18	%		2.59	%		3.17	%
Weighted Average Expected Long-Term Return on Plan Assets		7.34	%		7.15	%		7.24	%		N/A			N/A			N/A
Weighted Average Rate of Compensation Increase		5.78	%		5.59	%		5.8	%		N/A			N/A			N/A
Cash Balance Account Interest Crediting Rate (1)		4.45%/3.8%			4.45%/3.0%			4.45	%		N/A			N/A			N/A
Cash Balance Account Conversion Rate (1)		1.25%/4.57%/5.60%			0.97%/3.50%/4.60%			1.99%/4.47%/5.26%			N/A			N/A			N/A
(1) Only applicable to the U.S. Plans.
The expected long-term rate of return assumption was 7.75% for each of the years ended December 31, 2014, 2013 and 2012 for the U.S. Qualified Plan, our principal pension plan. For the year ended December 31, 2015, we will apply a 7.75% expected long-term rate of return assumption to the U.S. Qualified Plan. This assumption is based on the plan’s 2014 target asset allocation of 50% equity securities, 47% debt securities and 3% real estate. The expected long-term rate of return assumption reflects long-term capital market return forecasts for the asset classes employed, assumed excess returns from active management within each asset class, the portion of plan assets that are actively managed, and periodic rebalancing back to target allocations. Current market factors such as inflation and interest rates are evaluated before the long-term capital market assumptions are determined. In addition, peer data and historical returns are reviewed to check for reasonableness. Although we review our expected long-term rate of return assumption annually, our plan performance in any one particular year does not, by itself, significantly influence our evaluation. Our assumption is generally not revised unless there is a fundamental change in one of the factors upon which it is based, such as the target asset allocation or long-term capital market return forecasts.
Obligations
We use the discount rate to measure the present value of pension plan obligations and postretirement health care obligations at year-end as well as to calculate next year’s pension income or cost. It is derived by using a yield curve approach which matches projected plan benefit payment streams with bond portfolios reflecting actual liability duration unique to the plans. The rate is adjusted at each remeasurement date, based on the factors noted above.
Plan Assets (U.S. Qualified Plan and non-U.S. pension plans)
A financial instrument’s level or categorization within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement.
The following is a description of the valuation methodologies used for the investments measured at fair value, including the general classification of such investments pursuant to the valuation hierarchy. There have been no changes in the methodologies used at December 31, 2014 and 2013.
Common Stocks and Preferred Stocks
Common stocks and preferred stocks are valued at the closing price reported on the active market in which the individual securities are traded. Common stocks and preferred stocks are classified as Level I assets as they are traded in active markets, such as the NYSE, NASDAQ or European exchanges with quoted market prices, which serve as observable inputs.
Commingled Equity Funds
This asset category represents a common collective trust that seeks to provide a total investment return in line with the performance of the S&P 500 Index® over the long term. Commingled equity funds are classified as Level II assets.  The Net Asset Value (“NAV”) of commingled equity funds are determined by prices of the underlying securities, less the funds' liabilities, and then divided by the number of shares outstanding. The commingled equity funds are classified as Level II assets as they may be redeemed at NAV daily. This asset category does not have any unfunded commitments or any redemption restrictions.
Commingled Fixed Income Funds
This asset category consists of debt and fixed income securities whose investment objectives include outperformance of the Barclays Capital Long Government/Credit Index; the Barclays Capital U.S. Aggregate Bond Index; the Barclays Capital Mortgage Backed Securities Index; the Barclays Capital U.S. Corporate High Yield 2% Issuer Cap Index; the Citigroup Non U.S. Dollar World Government Bond Index and the S&P/LSTA Performing Loan Index.
Commingled fixed income funds are classified as Level II assets. These investments are valued using the NAV provided by the administrator of the fund. The NAV of commingled fixed income funds are determined by prices of the underlying securities, less the funds' liabilities, and then divided by the number of shares outstanding. The commingled fixed income funds are classified as Level II assets as they may be redeemed at NAV daily. The asset category does not have any unfunded commitments or any redemption restrictions.
Corporate and Other Bonds
These assets are classified as Level II assets. These investments trade in markets that are not considered to be active and whose values are based on quoted market prices or dealer quotations. Corporate Bonds are typically traded over-the-counter, not via exchanges with prices negotiated individually. Hence, identical assets can be quoted with different prices depending on the parties involved. Observable inputs would be the prices obtained from third party pricing sources retained by the custodian. Such prices are determined by Treasury yields and corporate spreads.
U.S., State and Foreign Government Bonds and U.S. Agency Mortgage Backed Securities
U.S. Treasury Securities are a Level I asset due to the availability of quoted prices in an active market on a daily basis. U.S. Treasury prices can be obtained via direct market quotes provided by market makers and U.S. Treasuries have much more pricing transparency (i.e., very little bid-ask spread versus the other instruments having a larger bid-ask spread).
State, government and government agency obligations are generally valued based on bid quotations for identical or similar obligations. Foreign Government Bonds, U.S. Agency debt or mortgage backed securities are traded over-the-counter, not via exchanges. Observable inputs would be the prices obtained from third party pricing sources retained by the custodian. These investments are classified as Level II assets.
Real Estate Investment Trusts
The real estate investment trusts component of Plan assets are made up of publicly traded U.S. and foreign equities in the real estate industry. Since quoted prices are available in active markets and the Plan has the ability to access these prices at the measurement date, these investments are classified as Level I assets and can be redeemed daily.
Real Estate Funds
The investment objective of this category is to exceed the National Council of Real Estate Investment Fiduciaries Open-End Diversified Core Index (“NCREIF ODCE Index”). Real estate funds investing in real private properties are classified as Level III assets because liquidity is     limited and there are few observable market participant transactions. The values of real estate properties are prepared giving consideration to the income, cost and sales comparison approaches of estimating property values. The underlying investments are valued using third parties. The investment valuations are obtained through appraisals using the income approach based on unobservable cash flows to be received from expected rents. The cost approach     estimates the replacement cost of the building less depreciation, plus the land value. The sales comparison approach compares recent transactions to the appraised property. Real estate funds are valued at NAV quarterly. Investment holders can request redemption on a quarterly basis. The ability of the investment holder to redeem funds quarterly is subject to the availability of cash arising from net investment income, allocations and the sale of investments in the normal course of business. To the extent that redemption requests exceed the availability of cash, the real estate fund has uniform procedures to provide for cash payments, which may be deferred for such period as the real estate fund considers necessary in order to obtain the funds to be withdrawn. There were no unfunded withdrawal requests at December 31, 2014.
Short-Term Investment Funds (STIF)
These investments include cash, bank notes, corporate notes, government bills and various short-term debt instruments. The investment objective is to provide safety of principal and daily liquidity by investing in high quality money market instruments. They are valued at the NAV. The short term funds are classified as Level II assets as they may be redeemed at NAV daily.
There were no transfers between Level I and Level II investments during the years ended December 31, 2014 and December 31, 2013.
The preceding methods may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. The Company believes its valuation methods are appropriate and consistent with other market participants; however, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date.
The following table sets forth by level, within the fair value hierarchy, the plan assets at fair value as of December 31, 2014:
Asset Category		Quoted Prices in Active Markets for Identical Assets (Level I)				Significant Other Observable Inputs (Level II)				Significant Unobservable Inputs				Total
										(Level III)
Common and Preferred Stocks:
Consumer		$	40			$	—			$	—			$	40
Energy		15.8				—				—				15.8
Financial		68.9				—				—				68.9
Health Care		30.6				—				—				30.6
Industrial		35.7				—				—				35.7
Information Technology		58.5				—				—				58.5
Other		9.3				—				—				9.3
Preferred Stocks		3.8				—				—				3.8
Total Common and Preferred Stocks		$	262.6			$	—			$	—			$	262.6
Commingled Funds:
Commingled Equity Funds		$	—			$	476.9			$	—			$	476.9
Commingled Fixed Income Funds		—				490.9				—				490.9
Total Commingled Funds		$	—			$	967.8			$	—			$	967.8
Bonds:
Corporate Bonds		$	—			$	72.8			$	—			$	72.8
Other Bonds		—				14.2				—				14.2
Total Bonds		$	—			$	87			$	—			$	87
Government Bonds and Mortgage Backed Securities:
U.S. Government Bonds and Notes		$	58.8			$	—			$	—			$	58.8
Foreign Government Bonds		—				4.7				—				4.7
U.S. Agency Mortgage Backed Securities		—				46.8				—				46.8
Total Government Bonds and Mortgage Backed Securities		$	58.8			$	51.5			$	—			$	110.3
State and Local Obligations		—				6.3				—				6.3
Real Estate Investment Trusts		3.6				—				—				3.6
Real Estate Funds		—				—				42.7				42.7
Short-Term Investment Funds		—				36.6				—				36.6
Total Investments at Fair Value		$	325			$	1,149.20			$	42.7			$	1,516.90
The following table sets forth by level, within the fair value hierarchy, the plan assets at fair value as of December 31, 2013:
Asset Category		Quoted Prices in Active Markets for Identical Assets (Level I)				Significant Other Observable Inputs (Level II)				Significant Unobservable Inputs				Total
										(Level III)
Common and Preferred Stocks:
Consumer		$	35.5			$	—			$	—			$	35.5
Energy		15.8				—				—				15.8
Financial		44.2				—				—				44.2
Health Care		22.1				—				—				22.1
Industrial		32.6				—				—				32.6
Information Technology		36.9				—				—				36.9
Other		11.8				—				—				11.8
Preferred Stocks		1.2				—				—				1.2
Total Common and Preferred Stocks		$	200.1			$	—			$	—			$	200.1
Commingled Funds:
Commingled Equity Funds		$	—			$	580			$	—			$	580
Commingled Fixed Income Funds		—				402.6				—				402.6
Total Commingled Funds		$	—			$	982.6			$	—			$	982.6
Bonds:
Corporate Bonds		$	—			$	67.2			$	—			$	67.2
Other Bonds		—				12.6				—				12.6
Total Bonds		$	—			$	79.8			$	—			$	79.8
Government Bonds and Mortgage Backed Securities:
U.S. Government Bonds and Notes		$	38.6			$	—			$	—			$	38.6
Foreign Government Bonds		—				2				—				2
U.S. Agency Mortgage Backed Securities		—				48.6				—				48.6
Total Government Bonds and Mortgage Backed Securities		$	38.6			$	50.6			$	—			$	89.2
State and Local Obligations		—				7.3				—				7.3
Real Estate Investment Trusts		2.4				—				—				2.4
Real Estate Funds		—				—				38.9				38.9
Short-Term Investment Funds		—				51.4				—				51.4
Total Investments at Fair Value		$	241.1			$	1,171.70			$	38.9			$	1,451.70
Level III Gains and Losses
The table below sets forth the summary of changes in the fair value of all of our plans’ Level III assets for the years ended December 31:
		2014				2013
Beginning Balance at January 1		$	38.9			$	34.8
Actual return (loss) on plan assets:
Related to assets still held at the reporting date		3.8				4.1
Related to assets sold during the period		—				—
Purchases, sales and settlements		—				—
Transfers in and/or out of Level III		—				—
Balance at December 31		$	42.7			$	38.9
Investment Strategy
The investment objective for our principal plan, the U.S. Qualified Plan, is to achieve over the investment horizon a long-term total return, which at least matches our expected long-term rate of return assumption while maintaining a prudent level of portfolio risk. We emphasize long-term growth of principal while avoiding excessive risk so as to use Plan asset returns to help finance pension obligations, thus improving our Plan’s funded status. We predominantly invest in assets that can be sold readily and efficiently to ensure our ability to reasonably meet expected cash flow requirements. Although peer relative performance is examined, out-performance of such does not constitute an investment objective.
We define our primary risk concern to be the Plan’s funded status volatility and to a lesser extent total plan return volatility. Understanding that risk is present in all types of assets and investment styles, we acknowledge that some risk is necessary to produce long-term investment results that are sufficient to meet the Plan’s objectives. However, we monitor and ensure that the investment managers we employ make reasonable efforts to maximize returns while controlling for risk parameters.
Investment risk is also controlled through diversification among multiple asset classes, managers, investment styles and periodic rebalancing toward asset allocation targets. Risk is further controlled at the investment manager level by requiring managers to follow formal written investment guidelines which enumerate eligible securities, maximum portfolio concentration limits, excess return and tracking error targets as well as other relevant portfolio constraints. Investment results and risk are measured and monitored on an ongoing basis and quarterly investment reviews are conducted. The Plan’s active investment managers are prohibited from investing plan assets in equity or debt securities issued or guaranteed by the Company.
Our Plan assets are invested using a combination of both active and passive (indexed) investment strategies. Active strategies employ multiple investment management firms. The Plan’s equity securities are diversified across U.S. and non-U.S. stocks in order to further reduce risk at the total Plan level. Our active investment managers employ a range of investment styles and approaches that are combined in a way that compensates for capitalization and style biases versus benchmark indices. As such, our investment managers are expected to adhere to the investment management style for which they were hired and are evaluated regularly for adherence to investment discipline.
The Plan’s debt securities are diversified principally among securities issued or guaranteed by the U.S. government or its agencies, mortgage-backed securities, including collateralized mortgage obligations, corporate debt obligations and dollar-denominated obligations issued in the U.S. by non-U.S. banks and corporations. Generally, up to 10% of the actively managed debt securities may be invested in securities rated below investment grade. The plan’s real estate investments are made through a commingled equity real estate fund of U.S. properties diversified by property type and geographic location.
We have formally identified the primary objective for each asset class within our Plan. U.S. equities are held for their long-term capital appreciation and dividend income, which is expected to exceed the rate of inflation. Non-U.S. equities are held for their long-term capital appreciation, as well as diversification relative to U.S. equities and other asset classes. Fixed income instruments are held as a source of current income and to reduce overall Plan volatility. Additionally they are designed to provide a partial hedge relative to the interest rate sensitivity of the Plan’s liabilities. Real estate investments are held as a hedge against unexpected inflation and are expected to provide a relatively high level of income. Real estate investments are also expected to provide diversification to the overall Fund. Cash is held only to meet liquidity requirements.
Allocations
We employ a total return investment approach in which a mix of equity, debt and real estate investments is used to achieve a competitive long-term rate of return on plan assets at a prudent level of risk. Our weighted average plan target asset allocation is 50% equity securities (range of 40% to 60%), 47% debt securities (range of 37% to 57%) and 3% real estate (range of 0% to 6%). The Plan’s actual allocation is controlled by periodic rebalancing back to target.
The following table sets forth the weighted average asset allocations and target asset allocations by asset category, as of the measurement dates of the plans:
		Asset Allocations						Target Asset Allocations
		As of December 31,
		2014			2013			2014			2013
Equity Securities		50	%		55	%		50	%		52	%
Debt Securities		47			42			47			45
Real Estate		3			3			3			3
Total		100	%		100	%		100	%		100	%
Contributions and Benefit Payments
We expect to contribute approximately $22 million to our U.S. Non-Qualified Plans and non-U.S. Pension Plans and approximately $3 million to our postretirement benefit plan for the year ended December 31, 2015. We made a $10.0 million and a $20.0 million contribution to the U.S. Qualified Plan in 2014 and 2013, respectively. We do not expect to make any required contributions to the U.S. Qualified Plan in 2015 for the 2014 plan year based on the minimum funding requirements as defined in the Pension Protection Act of 2006, as amended by the Moving Ahead for Progress in the 21st Century Act and the Highway Transportation Funding Act. Final funding requirements for 2015 will be determined based on our January 2015 funding actuarial valuation. However, we may consider making voluntary contributions to the U.S. Qualified Plan in 2015.
The following table summarizes expected benefit payments from our pension plans and postretirement plans through 2024. Actual benefit payments may differ from expected benefit payments. These amounts are net of expected plan participant contributions:
		Pension Plans				Postretirement Benefits Plan
2015		$	111.5			$	2.7
2016		$	114.8			$	2.5
2017		$	121.9			$	2.2
2018		$	120.3			$	2.1
2019		$	133.6			$	1.9
2020 - 2024		$	597.6			$	8.2
Health Care Benefits
The following table presents healthcare trend assumptions used to determine the year end benefit obligation:
		2014			2013
Medical (1)		6	%		6	%
Prescription Drug (1)		8	%		8	%
-1	The rates are assumed to decrease to 5.0% in 2020 and remain at that level thereafter.
Assumed health care cost trend rates have an effect on the amounts reported for the health care plans. A one-percentage-point change in the assumed health care cost trend rates would have the following effects:
		1% Point
		Increase				Decrease
Benefit Obligations at End of Year		$	(0.4	)		$	0.6
Service Cost Plus Interest Cost		$	—			$	—
401(k) Plan
We have a 401(k) Plan covering substantially all U.S. employees that provides for employee salary deferral contribution and employer contributions. Employees may contribute up to 50% of their pay on a pre-tax basis subject to IRS limitations. In addition, employees age 50 or older are allowed to contribute additional pre-tax “catch-up” contributions. In addition, the Company matches up to 50% of seven percent (7%) of a team member’s eligible compensation, subject to certain 401(k) Plan limitations.
We had expense associated with our 401(k) Plan of $8.5 million, for each of the years ended December 31, 2014 and 2013 and $13.6 million for the year ended December 31, 2012. The decrease in expense in 2013 was due to discretionary Company contributions of $5.3 million in 2012, which did not recur in 2014 or 2013.

Employee_Stock_Plans

Employee Stock Plans	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Employee Stock Plans	Employee Stock Plans
	The total stock-based compensation expense and expected tax benefit are as follows:
			For the Years Ended December 31,
			2014				2013				2012
	Stock-based Compensation Expense:
	Restricted Stock Units/Restricted Stock		$	9.7			$	6.3			$	6.1
	Stock Options		0.9				1.7				3.8
	ESPP		0.8				0.7				0.7
	Total Compensation Expense		$	11.4			$	8.7			$	10.6
			For the Years Ended December 31,
			2014				2013				2012
	Expected Tax Benefit:
	Restricted Stock Units/Restricted Stock		$	3.5			$	2.3			$	2.3
	Stock Options		0.3				0.6				1.4
	Total Expected Tax Benefit		$	3.8			$	2.9			$	3.7
	Stock Incentive Plans
	The Dun & Bradstreet Corporation 2009 Stock Incentive Plan (“2009 SIP”) and 2000 Dun & Bradstreet Corporation Non-Employee Directors’ Stock Incentive Plan (“2000 DSIP”) allow for the granting of stock-based awards, such as, but not limited to, stock options, restricted stock units and restricted stock, to certain employees and non-employee directors.
	On May 5, 2009, our shareholders approved the 2009 SIP which authorized the issuance of up to 5,400,000 shares of our common stock plus any shares that were remaining and available for issuance under The Dun & Bradstreet Corporation 2000 Stock Incentive Plan (“2000 SIP”) that were not subject to outstanding awards as of May 5, 2009 or that become available for issuance upon forfeiture, cancellation or expiration of awards granted under the 2000 SIP without having been exercised or settled in shares. As of December 31, 2014, 1,133,539 shares were remaining and available from the 2000 SIP. At December 31, 2014, 2013 and 2012, 4,302,782 shares, 4,679,309 shares and 4,813,551 shares of our common stock, respectively, were available for future grants under the 2009 SIP.
	On May 2, 2007, our shareholders approved an amendment increasing the authorization under the 2000 DSIP from 300,000 shares of common stock to 700,000 shares of common stock. At December 31, 2014, 2013 and 2012, 124,638 shares, 152,438 shares and 192,206 shares of our common stock, respectively, were available for future grants under the 2000 DSIP.
	Our practice has been to settle all awards issued under the stock incentive plans and ESPP through the issuance of treasury shares. In addition, we have in place share repurchase programs to mitigate the dilutive effect of the shares issued under these plans.
	Restricted Stock Units
	Our restricted stock units/restricted stock programs include both performance-based awards and service-based awards. The performance-based awards have either a market condition or a performance condition. All awards contain a service-based condition. The compensation expense for our performance-based awards is recognized on a graded-vesting basis over the requisite service period. The expense for the performance-based awards with market conditions is recognized regardless of whether the market condition is satisfied, provided that the requisite service has been met. The expense for our performance-based awards with performance conditions is initially recognized assuming that the target level of performance will be achieved. Each reporting period we assess the probability of achieving the performance targets and if necessary adjust the compensation expense based on this assessment. Final compensation expense recognized will ultimately depend on the actual number of shares earned against the performance condition as well as fulfillment of the requisite service condition. The expense for our awards earned based solely on the fulfillment of the service-based condition is recognized on a straight-line basis over the requisite service periods.
	Performance-based Restricted Stock Units
	Leveraged Restricted Stock Units (“LRSUs”) - Beginning in 2013, certain employees were granted target awards of LRSUs. These awards vest in three substantially equal annual tranches beginning one year from the date of grant. The actual number of shares of our common stock ultimately received by the employee can range from zero to 200% of the target award depending on the Company’s stock price appreciation or depreciation over a one year, two year and three year performance period. As these awards contain a market condition, we have calculated the fair value on the date of grant using a Monte Carlo simulation model with the following weighted average assumptions:
		2014		2013		2012
	Expected stock price volatility	26%		25%		N/A
	Expected dividend yield	1.60%		1.90%		N/A
	Expected term (in years)	3		3		N/A
	Risk-free interest rate	0.64%		0.38%		N/A
	Fair value of LRSUs granted	$92.37		$85.48		N/A
	Expected stock price volatility is based on a blend of historical volatility and, when available, implied volatility. The expected dividend yield assumption is determined by dividing our most recent quarterly dividend payment by the average of the stock price from the three months preceding the grant date. Expected term is based on the period from the date of grant through the end of the performance evaluation period. The result is then annualized and compounded. The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant.
	The LRSUs are not entitled to dividend equivalents.
	Performance Units with Market Condition - Beginning in 2013, certain employees were granted target awards of Performance Units which contained a market condition. These awards vest in two substantially equal annual tranches beginning three years from the date of grant. The actual number of shares of our common stock ultimately received by the employee can range from zero to 200% of the target award depending on the Company’s three-year Total Shareholder Return performance relative to Standard & Poor’s 500 companies. As these awards contain a market condition, we have calculated the fair value on the date of grant using a Monte Carlo simulation model with the following weighted average assumptions:
		2014		2013		2012
	Expected stock price volatility	27%		25%		N/A
	Expected dividend yield	1.60%		2.00%		N/A
	Expected term (in years)	2.8		2.8		N/A
	Risk-free interest rate	0.60%		0.33%		N/A
	Fair value of Performance Units granted	$72.54		$86.59		N/A
	Expected stock price volatility is based on historical volatility. The expected dividend yield assumption is determined by dividing our most recent quarterly dividend payment by the average of the stock price from the three months preceding the grant date. The result is then annualized and compounded. Expected term is based on the period from the date of grant through the end of the performance evaluation period. The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant.
	The Performance Units with Market Condition are not entitled to dividend equivalents.
	Performance Units with Performance Condition - Beginning in 2013, certain employees were granted target awards of Performance Units which contained a performance condition. These awards vest in two substantially equal annual tranches beginning three years from the date of grant. The actual number of shares of our common stock ultimately received by the employee can range from zero to 200% of the target award depending on the Company’s three-year revenue compounded annual growth rate. The fair value is estimated by using the average of the high and low prices of our common stock on the date of grant.
	The Performance Units with Performance Condition are not entitled to dividend equivalents.
	Restricted Stock Unit Opportunity - Prior to 2014, certain employees were provided an annual opportunity to receive an award of restricted stock units or restricted stock in the future. The award was contingent on performance against the same goals that drove the payout under the annual cash incentive plan. The restricted stock units or restricted stock were granted after the one-year performance goals had been met and then vest over a three-year period on a graded vesting basis. Beginning in 2010, we only provided an opportunity to receive an award of restricted stock units and no longer have restricted stock award grants outstanding. The annual awards of restricted stock units or restricted stock to employees were generally granted in the first quarter of the year following the conclusion of the fiscal year for which the goals were measured and attained.
	The fair value is calculated by using the average of the high and low prices of our common stock on the date of grant. The restricted stock units earned from the restricted stock opportunity are entitled to dividend equivalents, payable only if and when the underlying restricted stock unit vests.
	Changes in our nonvested performance-based restricted stock units for the year ended December 31, 2014 are summarized as follows:
	Performance-based Restricted Stock Units		Shares			Weighted Average Grant-Date Fair Value Per Share				Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value
	Nonvested Shares at December 31, 2013		139,418			$	84.22			2.1		$	17.1
	Granted		125,122			$	90.73
	Adjustment For Shares Earned Against Target (1)		7,026
	Vested		(48,698	)		$	83.59
	Forfeited		(19,817	)		$	83.8
	Nonvested Shares at December 31, 2014 (2)		203,051			$	88.4			2.1		$	24.6
	(1) Represents share adjustment as a result of final performance against specified performance targets.
	(2) Represents the number of shares expected to be issued based on achievement of grant date performance targets. The
	actual number of shares issued will depend on the company’s actual performance against specified targets during the
	performance periods.
	Total unrecognized compensation expense related to nonvested performance-based restricted stock units at December 31, 2014 was $7.3 million. This expense is expected to be recognized over a weighted average period of 1.9 years. The weighted average grant date fair value per share of the performance-based restricted stock units and restricted stock granted during the years ended December 31, 2013 and 2012 were $84.01 and $82.80, respectively.
	Service-based Restricted Stock Units
	In order to attract and retain executive talent, the Company issues special grants of restricted stock units to certain employees. These grants generally vest over a three to five-year period on a graded vesting basis.
	Our non-employee directors receive grants of restricted stock units as part of their annual equity retainer. Beginning in 2014, the non-employee directors grants will vest on a cliff-vesting basis immediately prior to the next annual meeting of shareholders (normally about one year). Prior year grants vested on a cliff-vesting basis three years from the date of grant.
	For the service-based restricted stock units, the fair value is calculated by using the average of the high and low prices of our common stock on the date of grant. The service-based restricted stock units are entitled to dividend equivalents payable only if and when the underlying restricted stock units vest.
	Changes in our nonvested service-based restricted stock units for the year ended December 31, 2014 are summarized as follows:
	Service-based Restricted Stock Units		Shares			Weighted Average Grant-Date Fair Value Per Share				Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value
Nonvested Shares at December 31, 2013		120,008			$	81.83			1.6		$	14.7
Granted		88,523			$	104.44
Vested		(23,357	)		$	82.51
Forfeited		(18,861	)		$	82.29
Nonvested Shares at December 31, 2014		166,313			$	93.72			1.6		$	20.1
Total unrecognized compensation expense related to nonvested service-based restricted stock units at December 31, 2014 was $6.9 million. This expense is expected to be recognized over a weighted average period of 1.6 years. The weighted average grant date fair value per share of the service-based restricted stock units and restricted stock granted during the years ended December 31, 2013 and 2012 were $89.55 and $80.42, respectively.
The total fair value of all restricted stock units and restricted stock vesting during the years ended December 31, 2014, 2013 and 2012 were $7.5 million, $12.1 million and $10.6 million, respectively. The expected tax benefit associated with the tax deduction from the vesting of restricted stock units and restricted stock totaled $2.8 million, $4.5 million and $3.9 million for the years ended December 31, 2014, 2013 and 2012, respectively.
Stock Option Programs
Stock options granted under the 2009 SIP and 2000 SIP generally vest in four equal installments beginning on the first anniversary of the grant. Stock options granted under the 2000 DSIP generally vest 100% on the first anniversary of the grant. All stock options generally expire ten years from the date of the grant. The annual award of stock options to employees were generally granted in the first quarter of the year. Beginning in 2013, the annual award of stock options to employees was replaced with an award of Leveraged Restricted Stock Units.
The fair value of each stock option award was estimated on the date of grant using the Black-Scholes option valuation model that used the weighted average assumptions in the following table:
	2014		2013		2012
Expected stock price volatility	24%		23%		23%
Expected dividend yield	1.60%		1.60%		1.80%
Expected term (in years)	7		6.5		6
Risk-free interest rate	2.21%		1.66%		1.21%
Fair value of stock options granted	$26.06		$21.57		$15.01
Expected stock price volatility assumption is derived from the historical volatility of our common stock. The expected dividend yield assumption is determined by dividing the anticipated annual dividend payment by the stock price on the date of grant. We determine the expected term assumption using a midpoint scenario which combines our historical exercise data with hypothetical exercise data for our unexercised stock options. The risk-free interest rate assumption corresponds to the expected term assumption of the stock option and is based on the U.S. Treasury yield curve in effect at the time of grant.
Changes in stock options for the year ended December 31, 2014 are summarized as follows:
Stock Options	Shares			Weighted Average Exercise Price Per Share				Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value
Outstanding at December 31, 2013	855,747			$	79.23			5.7		$	37.2
Granted	1,340			$	110.76
Exercised	(112,093	)		$	71.55
Forfeited or expired	(18,650	)		$	82.28
Outstanding at December 31, 2014	726,344			$	80.39			5		$	29.5
Exercisable and unvested expected to vest at December 31, 2014	724,258			$	80.38			5		$	29.4
Exercisable at December 31, 2014	566,929			$	79.93			4.4		$	23.3
Stock options outstanding at December 31, 2014 were originally granted during the years 2005 through 2014 and are exercisable over periods ending no later than 2024. At December 31, 2013 and 2012, stock options for 501,439 shares and 1,127,607 shares of our common stock, respectively, were exercisable.
The total intrinsic value of stock options exercised during the years ended December 31, 2014, 2013 and 2012 were $4.3 million, $20.8 million and $8.4 million, respectively.
The following table summarizes information about stock options outstanding at December 31, 2014:
		Stock Options Outstanding									Stock Options Exercisable
Range of Exercise Prices		Shares			Weighted Average Remaining Contractual Term (in years)		Weighted Average Exercise Price Per Share				Shares		Weighted Average Exercise Price Per Share
$60.49-$71.28		172,877			4.1		$	69.76			170,127		$	69.88
$77.00-$80.45		187,900			5.5		$	80.16			145,725		$	80.09
$82.64-$82.80		197,900			7.1		$	82.8			84,750		$	82.8
$88.04-$110.76		167,667			2.7		$	88.77			166,327		$	88.59
		726,344									566,929
Total unrecognized compensation expense related to nonvested stock options at December 31, 2014 was $0.6 million. This expense is expected to be recognized over a weighted average period of approximately one year. The total fair value of stock options vested during the years ended December 31, 2014, 2013 and 2012 were $2.7 million, $4.2 million and $4.8 million, respectively.
Cash received from the exercise of Dun & Bradstreet stock options for the year ended December 31, 2014 was $3.7 million. The expected tax benefit associated with the tax deduction from the exercise of stock options totaled $1.6 million for the year ended December 31, 2014.
Employee Stock Purchase Plan
Under The Dun & Bradstreet Corporation 2000 Employee Stock Purchase Plan, we are authorized to sell (to eligible employees) up to 1,500,000 shares of our common stock of which 317,005 shares remain available for future purchases as of December 31, 2014.
Under the terms of the ESPP, employees can purchase our common stock at a 15% discount from market value, subject to certain limitations as set forth in the ESPP. The purchase price of the stock on the date of purchase is 85% of the average of the high and low prices of our stock on the last trading day of the month. Under the ESPP, we sold 42,958, 50,277 and 58,417 shares to employees for the years ended December 31, 2014, 2013 and 2012, respectively. Cash received from employees participating in the ESPP for the year ended December 31, 2014 was $4.0 million.

Lease_Commitments_and_Contract

Lease Commitments and Contractual Obligations	12 Months Ended
	Dec. 31, 2014
Leases [Abstract]
Lease Commitments and Contractual Obligations	Lease Commitments and Contractual Obligations
	Most of our operations are conducted from leased facilities, which are under operating leases that expire over the next ten years, with the majority expiring within five years. Our corporate office is located at 103 JFK Parkway, Short Hills, New Jersey 07078, in a 123,000-square-foot property that we lease. This property also serves as our executive offices. In December 2014, we supplemented this space with the addition of 69,280 square feet of leased office space located at 101 JFK Parkway, Short Hills, New Jersey. In connection with this arrangement, the leases on both properties are co-terminous and have remaining terms of seven and one-half years, with two five-year renewal options.
	We also lease certain computer and other equipment under operating leases that expire over the next three and five years, respectively. These computer and other equipment leases are frequently renegotiated or otherwise changed as advancements in computer technology produce opportunities to lower costs and improve performance. Rental expenses under operating leases (cancelable and non-cancelable) were $28.7 million, $30.1 million, and $29.6 million for the years ended December 31, 2014, 2013 and 2012, respectively.
	Acxiom Corporation
	In July 2006, we signed a four-year North American product and technology outsourcing agreement with Acxiom in order to significantly increase the speed, data processing capacity and matching capabilities we provide our global sales and marketing customers. In November 2008, we extended the term of the North American outsourcing agreement through 2011. In December 2011, a three-year agreement was reached to further extend the North American product and technology outsourcing agreement until the end of 2014. In June 2014, we exercised a renewal option to extend this agreement through the end of 2015. Effective January 1, 2015, a three-year agreement was reached to further extend the North American product and technology outsourcing agreement through the end of 2017.
	In August 2008, we entered into a 65-month agreement to expand our service capabilities, enhance customer experience and accelerate the migration of the remaining existing Dun & Bradstreet fulfillment processes for our European markets to Acxiom. In December 2013, we exercised a two year renewal option to extend the contract through December 2015.
	In May 2009, we entered into another agreement with Acxiom to provide certain infrastructure management services that were formerly provided by Computer Sciences Corporation (“CSC”). These services included data center operations, technology help desk and network management functions. The agreement originally had an initial term ending in October 2014 and included the right to extend the agreement under the same terms for up to a maximum period of three years after the expiration of the original term. In 2010, we signed an infrastructure outsourcing agreement for data center operations, technology help desk and network management functions in Ireland, with an initial term ending in October 2014. In 2010, we entered into two amendments with Acxiom extending the initial terms of both agreements by a total of eight months until June 2015. We retain the right to extend these agreements for up to three years after the expiration of these amended terms. In December 2014, we exercised the first of three options to extend these agreements by twelve months, until June 2016. In the fourth quarter of 2012, we notified Acxiom of our intent to terminate certain data center and technology infrastructure support services. This was done in connection with our desire to insource certain technology functions in which it is both performance and financially beneficial. Payments over these contract terms will aggregate to approximately $473 million.
	These agreements provide for typical adjustments due to changes in volume, inflation and incremental project work.
	We incurred costs of approximately $83 million, $89 million and $90 million under all of Acxiom agreements for the years ended December 31, 2014, 2013 and 2012, respectively. Total payments to Acxiom over the remaining terms of all contracts will aggregate to approximately $132 million.
	Convergys Customer Management Group
	In December 2010, we entered into a six-year business process outsourcing agreement effective January 1, 2011, with Convergys Customer Management Group (“CCMG”) in order to enhance our customer contact center solution. CCMG has transitioned contact center services previously outsourced principally to International Business Machines (“IBM") as well as certain other smaller providers.
	The transition of services to CCMG was based on a phased migration of business volume to CCMG that commenced in the second quarter of 2011 and was substantially completed by the fourth quarter of 2011. Services are primarily provided from CCMG locations in Omaha, Nebraska, the Philippines and India, on the basis of our requirements.
	The primary scope of the agreement includes the following services for our North America business: (i) Inbound Customer Service, which principally involves the receipt of, response to and resolution of inquiries received from customers; (ii) Outbound Customer Service, which principally involves the collection, compilation and verification of information contained in our databases; and (iii) Data Update Service, which principally involves the bulk or discrete updates to the critical data elements about companies in our databases.
	The agreement also specifies service level commitments required of CCMG for achievement of our customer satisfaction targets and a methodology for calculating credits to us if CCMG fails to meet certain service levels. In addition, CCMG’s performance under the agreement will be measured in part by our overall satisfaction of the program as measured by a customer satisfaction survey of our key internal business partners.
	In December 2011, we signed a five-year telephone agreement to support our small business customers’ telesales team.
	After the first three years of service by CCMG, we have the right to terminate for convenience any or all of the services provided under the agreements upon one hundred eighty days prior written notice. The agreement provides for typical adjustments due to changes in volume, inflation and incremental project work. We incurred costs of approximately $21 million, $21 million, and $20 million for the years ended December 31, 2014, 2013, and 2012, respectively. Total payments to CCMG over the remaining terms of the above contracts will aggregate to approximately $38 million.
	International Business Machines
	In October 2004, we signed a seven-year outsourcing agreement with IBM. Under the terms of the agreement, we transitioned certain portions of our data acquisition and delivery and customer service to IBM. By August 2010, our data acquisition, delivery and customer services performed by IBM for our European countries were terminated. Additionally, by October 2011 our customer contact center services for the United States were terminated as a result of our transition to CCMG.
	In August 2012, we signed an amendment with IBM extending the term of the limited delivery services to our North American customers until January 2017. Payments over the remaining contract term will aggregate to approximately $7 million. The agreement provides for typical adjustments due to changes in volume, inflation and incremental project work.
	We incurred costs of approximately $3 million for each of the years ended December 31, 2014, 2013 and 2012 under this agreement.
	The following table quantifies our future contractual obligations as discussed above as of December 31, 2014:
	Contractual Obligations	2015		2016		2017		2018		2019		Thereafter		Total
	Operating Leases	$	29.4	$	24.5	$	16.2	$	14.1	$	13	$	49.4	$	146.6
	Obligations to Outsourcers	$	135.7	$	76.5	$	12.7	$	2.9	$	—	$	—	$	227.8
	The table above excludes pension obligations for which funding requirements are uncertain, excludes long-term contingent liabilities and excludes unrecognized tax benefits. Our obligations with respect to pension and postretirement medical benefit plans are described in Note 10 to the consolidated financial statements included in this Annual Report on Form 10-K. Our long-term contingent liabilities with respect to legal matters are discussed in Note 13 to the consolidated financial statements included in this Annual Report on Form 10-K. Our obligations with respect to senior notes and credit facilities are discussed in Note 6 to the consolidated financial statements included in this Annual Report on Form 10-K. Our obligations with respect to unrecognized tax benefits are discussed in Note 5 to the consolidated financial statements included in this Annual Report on Form 10-K.

Contingencies

Contingencies	12 Months Ended
	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Contingencies	Contingencies
	We are involved in legal proceedings, claims and litigation arising in the ordinary course of business for which we believe that we have adequate reserves, and such reserves are not material to the consolidated financial statements. We record a liability when management believes that it is both probable that a liability has been incurred and we can reasonably estimate the amount of the loss. For such matters where management believes a liability is not probable but is reasonably possible, a liability is not recorded; instead, an estimate of loss or range of loss, if material individually or in the aggregate, is disclosed if reasonably estimable, or a statement will be made that an estimate of loss cannot be made. Once we have disclosed a matter that we believe is or could be material to us, we continue to report on such matter until there is finality of outcome or until we determine that disclosure is no longer warranted. Further, we believe our estimate of the aggregate range of reasonably possible losses, in excess of established reserves, for our legal proceedings was not material at December 31, 2014. In addition, from time to time, we may be involved in additional matters, which could become material and for which we may also establish reserve amounts, as discussed below.
	China Operations
	On March 18, 2012, we announced we had temporarily suspended our Shanghai Roadway D&B Marketing Services Co. Ltd. (“Roadway”) operations in China, pending an investigation into allegations that its data collection practices may have violated local Chinese consumer data privacy laws. Thereafter, the Company decided to permanently cease the operations of Roadway. In addition, we have been reviewing certain allegations that we may have violated the Foreign Corrupt Practices Act and certain other laws in our China operations. As previously reported, we have voluntarily contacted the Securities and Exchange Commission (“SEC”) and the United States Department of Justice (“DOJ”) to advise both agencies of our investigation, and we are continuing to meet with representatives of both the SEC and DOJ in connection therewith. Our investigation remains ongoing and is being conducted at the direction of the Audit Committee.
	On September 28, 2012, Roadway was charged in a Bill of Prosecution, along with five former employees, by the Shanghai District Prosecutor with illegally obtaining private information of Chinese citizens. On December 28, 2012, the Chinese court imposed a monetary fine on Roadway and fines and imprisonment on four former Roadway employees. A fifth former Roadway employee was separated from the case.
	For the years ended December 31, 2014 and 2013, we incurred $3.7 million and $7.4 million, respectively, of legal and other professional fees related to matters in China. Additionally, during the year ended December 31, 2012, we incurred $13.5 million of legal and other professional fees and $2.1 million in local shut-down costs, as well as an impairment charge of $12.9 million related to accounts receivable, intangible assets, prepaid costs and software for Roadway, an operation in our Greater China reporting unit. For the year ended December 31, 2012, the Roadway operations had $5.4 million of revenue and $14.5 million of operating loss. Dun & Bradstreet acquired Roadway’s operations in 2009, and for 2011 Roadway accounted for approximately $22 million in revenue and $2 million in operating income.
	As our investigation and our discussions with both the SEC and DOJ are ongoing, we cannot yet predict the ultimate outcome of the matter or its impact on our business, financial condition or results of operations. Based on our discussions with the SEC and DOJ, including an indication from the SEC in February 2015 of its initial estimate of the amount of net benefit potentially earned by the Company as a result of the challenged activities, we continue to believe that it is probable that the Company will incur a loss related to the government's investigation. We will be meeting with the Staff of the SEC to obtain and understand the assumptions and methodologies underlying their initial estimate and will subsequently provide a responsive position. The DOJ also advised the Company in February 2015 that they will be proposing terms of a potential settlement, but we are unable to predict the terms of any such proposal. Accordingly, we are unable at this time to reasonably estimate the amount or range of any loss, although it is possible that the amount of such loss could be material. In accordance with ASC 450, “Contingencies,” or “ASC 450,” no amount in respect of any potential liability in this matter, including for penalties, fines or other sanctions, has been accrued in the consolidated financial statements.
	Dun & Bradstreet Credibility Corporation v. Dun & Bradstreet, Inc., and The Dun & Bradstreet Corporation, Index No. 650568/2014 (N.Y. State Supreme Court)
	On February 20, 2014, Dun & Bradstreet Credibility Corporation (“DBCC”) filed an action in the Supreme Court of the State of New York for the County of New York against the Company. DBCC is an unaffiliated entity with license rights to use the Company’s brand name and to sell certain of the Company’s products. The complaint alleges that the Company breached the Commercial Services Agreement (“CSA”), entered into by the Company and DBCC on July 30, 2010 in connection with DBCC’s acquisition of the Company’s North American Self Awareness Solution business. The complaint alleges that the Company breached several of the CSA’s terms, and that the Company is trying to terminate the CSA through improper means. The Complaint alleges causes of action for breach of contract; breach of the covenant of good faith and fair dealing, in the alternative; intentional interference with prospective economic advantage; and declaratory judgment. The Complaint seeks damages and declaratory and injunctive relief. The Company was served with the Complaint on February 24, 2014. On March 10, 2014, the court entered an order staying the lawsuit to permit the parties to attempt to resolve the matter in mediation.
	The Company is continuing to investigate the allegations. In accordance with ASC 450, we therefore do not have sufficient information upon which to determine that a loss in connection with this matter is probable, reasonably possible or estimable, and thus no reserve has been established nor has a range of loss been disclosed.
	Dun & Bradstreet Credibility Corporation Class Action Litigations
	O&R Construction, LLC v. Dun & Bradstreet Credibility Corporation, et al., No. 2:12 CV 02184 (TSZ) (W.D. Wash.)
	On December 13, 2012, plaintiff O&R Construction LLC filed a putative class action in the United States District Court for the Western District of Washington against the Company and DBCC, an unaffiliated entity. The complaint alleged, among other things, that defendants violated the antitrust laws, used deceptive marketing practices to sell the CreditBuilder credit monitoring products and allegedly misrepresented the nature, need and value of the products. The plaintiff purports to sue on behalf of a putative class of purchasers of CreditBuilder and seeks recovery of damages and equitable relief. On February 18, 2013, the Company filed a motion to dismiss the complaint. On April 5, 2013, plaintiff filed an amended complaint in lieu of responding to the motion. The amended complaint dropped the antitrust claims and retained the deceptive practices allegations. The Company filed a new motion to dismiss the amended complaint on May 3, 2013. On August 23, 2013, the Court heard the motion and granted it. Specifically, the Court dismissed a contract claim with prejudice, and dismissed all the remaining claims without prejudice. On September 23, 2013, plaintiff filed a Second Amended Complaint (“SAC”). The SAC alleges claims for negligence, defamation and unfair business practices under Washington state law against the Company for alleged inaccuracies in small business credit reports. The SAC also alleges liability against the Company under a joint venture or agency theory for practices relating to CreditBuilder. The Company filed a motion to dismiss the SAC. On January 9, 2014, the Court heard argument on the Company’s motion and dismissed with prejudice the claims based on a joint venture or agency liability theory brought against the Company. The Court denied the motion with respect to the negligence, defamation and unfair practices claims. On January 23, 2014, the Company answered the SAC. At a court conference on December 17, 2014, plaintiff informed the Court that it would not be seeking to certify a nationwide class, but instead limit the class to CreditBuilder purchasers in Washington. In accordance with ASC 450, we do not have sufficient information upon which to determine that a loss in connection with this matter is probable, reasonably possible or estimable, and thus no reserve has been established nor has a range of loss been disclosed.
	Die-Mension Corporation v. Dun & Bradstreet Credibility Corporation et al., No. 2:14-cv-00855 (TSZ) (W.D. Wash.) (filed as No. 1:14-cv-392 (N.D. Oh.))
	On February 20, 2014, plaintiff Die-Mension Corporation (“Die-Mension”) filed a putative class action in the United States District Court for the Northern District of Ohio against the Company and DBCC, an unaffiliated entity, purporting to sue on behalf of a putative class of all purchasers of a CreditBuilder product in the United States or in such state(s) as the Court may certify. The complaint alleged that DBCC used deceptive marketing practices to sell the CreditBuilder credit monitoring products. As against the Company, the complaint alleged a violation of Ohio’s Deceptive Trade Practices Act, defamation, and negligence. The complaint alleged deceptive trade practices, negligent misrepresentation and concealment against DBCC. On March 4, 2014, in response to a direction from the Ohio court, Die-Mension withdrew its original complaint and filed an amended complaint. The amended complaint contains the same substantive allegations as the original complaint, but limits the purported class to small businesses in Ohio that purchased the CreditBuilder product. On March 13, 2014, the Company agreed to waive service of the amended complaint. On May 5, 2014, the Company and DBCC filed a Joint Motion to Transfer the litigation to the Western District of Washington. On June 9, 2014, the Ohio court issued an order granting the Defendants’ Joint Motion to Transfer. On June 22, 2014, the case was transferred to the Western District of Washington. Pursuant to an order entered on December 17, 2014 by the Washington court, this case was coordinated for pre-trial discovery purposes with related cases transferred to the Western District of Washington. On January 6, 2015, the Court entered a stipulation and order setting forth the case management schedule. On January 15, 2015, Defendants filed motions to dismiss the amended complaint. Discovery in the case is ongoing and the Company is continuing to investigate the allegations. In accordance with ASC 450, we therefore do not have sufficient information upon which to determine that a loss in connection with this matter is probable, reasonably possible or estimable, and thus no reserve has been established nor has a range of loss been disclosed.
	Vinotemp International Corporation and CPrint®, Inc. v. Dun & Bradstreet Credibility Corporation, et al., No. 2:14-cv-01021 (TSZ) (W.D. Wash.) (filed as No. 8:14-cv-00451 (C.D. Cal.))
	On March 24, 2014, plaintiffs Vinotemp International Corporation (“Vinotemp”) and CPrint®, Inc. (“CPrint”) filed a putative class action in the United States District Court for the Central District of California against the Company and DBCC, an unaffiliated entity. Vinotemp and CPrint purport to sue on behalf of all purchasers of DBCC’s CreditBuilder product in the state of California. The complaint alleges that DBCC used deceptive marketing practices to sell the CreditBuilder credit monitoring products, in violation of §17200 and §17500 of the California Business and Professions Code. The complaint also alleges negligent misrepresentation and concealment against DBCC. As against the Company, the complaint alleges that the Company entered false and inaccurate information on credit reports in violation of § 17200 of the California Business and Professions Code, and also alleges negligence and defamation claims. On March 31, 2014, the Company agreed to waive service of the complaint. On June 13, 2014, the Company and DBCC filed a Joint Unopposed Motion to Transfer the litigation to the Western District of Washington. On July 2, 2014, the California court granted the Defendants’ Joint Motion to Transfer, and on July 8, 2014, the case was transferred to the Western District of Washington. Pursuant to an order entered on December 17, 2014 by the Washington court, this case was coordinated for pre-trial discovery purposes with related cases transferred to the Western District of Washington. On January 6, 2015, the Court entered a stipulation and order setting forth the case management schedule. On January 15, 2015, Defendants filed motions to dismiss the complaint. Discovery in the case is ongoing, and the Company is continuing to investigate the allegations. In accordance with ASC 450, we therefore do not have sufficient information upon which to determine that a loss in connection with this matter is probable, reasonably possible or estimable, and thus no reserve has been established nor has a range of loss been disclosed.
	Flow Sciences Inc. v. Dun & Bradstreet Credibility Corporation, et al., No. 2:14-cv-01404 (TSZ) (W.D. Wash.) (filed as No. 7:14-cv-128 (E.D.N.C.))
	On June 13, 2014, plaintiff Flow Sciences Inc. (“Flow Sciences”) filed a putative class action in the United States District Court for the Eastern District of North Carolina against the Company and DBCC, an unaffiliated entity. Flow Sciences purports to sue on behalf of all purchasers of DBCC’s CreditBuilder product in the state of North Carolina. The complaint alleges that the Company and DBCC engaged in deceptive practices in connection with DBCC’s sale of the CreditBuilder credit monitoring products, in violation of North Carolina’s Unfair Trade Practices Act, N.C. Gen. Stat. § 75-1.1 et seq. In addition, as against the Company, the complaint alleges negligence and defamation claims. The complaint also alleges negligent misrepresentation and concealment against DBCC. On June 26, 2014, the Company agreed to waive service of the complaint. On August 4, 2014, the Company and DBCC filed a Joint Unopposed Motion to Transfer the litigation to the Western District of Washington. On September 8, 2014, the North Carolina court granted the motion to transfer, and on September 9, 2014, the case was transferred to the Western District of Washington. Pursuant to an order entered on December 17, 2014 by the Washington court, this case was coordinated for pre-trial discovery purposes with related cases transferred to the Western District of Washington. On January 6, 2015, the Court entered a stipulation and order setting forth the case management schedule. On January 15, 2015, Defendants filed motions to dismiss the complaint. Discovery in the case is ongoing, and the Company is continuing to investigate the allegations. In accordance with ASC 450 Contingencies, we therefore do not have sufficient information upon which to determine that a loss in connection with this matter is probable, reasonably possible or estimable, and thus no reserve has been established nor has a range of loss been disclosed.
	Altaflo, LLC v. Dun & Bradstreet Credibility Corporation, et al., No. 2:14-cv-01288 (TSZ) (W.D. Wash.) (filed as No. 2:14-cv-03961 (D.N.J.))
	On June 20, 2014, plaintiff Altaflo, LLC (“Altaflo”) filed a putative class action in the United States District Court for the District of New Jersey against the Company and DBCC, an unaffiliated entity. Altaflo purports to sue on behalf of all purchasers of DBCC’s CreditBuilder product in the state of New Jersey. The complaint alleges that the Company and DBCC engaged in deceptive practices in connection with DBCC’s sale of the CreditBuilder credit monitoring products, in violation of the New Jersey Consumer Fraud Act, N.J. Stat. § 56:8-1 et seq. In addition, as against the Company, the complaint alleges negligence and defamation claims. The complaint also alleges negligent misrepresentation and concealment against DBCC. On June 26, 2014, the Company agreed to waive service of the complaint. On July 29, 2014, the Company and DBCC filed a Joint Unopposed Motion to Transfer the litigation to the Western District of Washington. On July 31, 2014, the New Jersey court granted the Defendants’ Joint Motion to Transfer, and the case was transferred to the Western District of Washington on August 20, 2014. Pursuant to an order entered on December 17, 2014 by the Washington court, this case was coordinated for pre-trial discovery purposes with related cases transferred to the Western District of Washington. On January 6, 2015, the Court entered a stipulation and order setting forth the case management schedule. On January 15, 2015, Defendants filed motions to dismiss the complaint. Discovery in the case is ongoing, and the Company is continuing to investigate the allegations. In accordance with ASC 450 Contingencies, we therefore do not have sufficient information upon which to determine that a loss in connection with this matter is probable, reasonably possible or estimable, and thus no reserve has been established nor has a range of loss been disclosed.
	Other Matters
	In addition, in the normal course of business, and including without limitation, our merger and acquisition activities and financing transactions, Dun & Bradstreet indemnifies other parties, including customers, lessors and parties to other transactions with Dun & Bradstreet, with respect to certain matters. Dun & Bradstreet has agreed to hold the other parties harmless against losses arising from a breach of representations or covenants, or arising out of other claims made against certain parties. These agreements may limit the time within which an indemnification claim can be made and the amount of the claim. Dun & Bradstreet has also entered into indemnity obligations with its officers and directors.
	Additionally, in certain circumstances, Dun & Bradstreet issues guarantee letters on behalf of our wholly-owned subsidiaries for specific situations. It is not possible to determine the maximum potential amount of future payments under these indemnification agreements due to the limited history of prior indemnification claims and the unique facts and circumstances involved in each particular agreement. Historically, payments made by Dun & Bradstreet under these agreements have not had a material impact on the consolidated financial statements.

Segment_Information

Segment Information	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Segment Information	Segment Information
	The operating segments reported below are our segments for which separate financial information is available and upon which operating results are evaluated by management on a timely basis to assess performance and to allocate resources.
	Through December 31, 2014, we managed and reported our business through the following three segments:
	•	North America (which consists of our operations in the U.S. and Canada);
	•	Asia Pacific (which primarily consists of our operations in Australia, Greater China, India and Asia Pacific Worldwide Network); and
	•	Europe and other International Markets (which primarily consists of our operations in the U.K., the Netherlands, Belgium, Latin America and our European Worldwide Network).
	To further align with our strategy, we began reporting our business as of January 1, 2015 through two segments:
	•	Americas (which consists of our operations in the U.S., Canada and Latin America); and
	•	Non Americas (which primarily consists of our operations in the U.K., the Netherlands, Belgium, Australia, Greater China, India and our Worldwide Network).
	Our customer solution sets are D&B Risk Management Solutions™ and D&B Sales & Marketing Solutions™. Inter-segment sales are immaterial, and no single customer accounted for 10% or more of our total revenue. For management reporting purposes, we evaluate business segment performance before restructuring charges and intercompany transactions, because these charges and transactions are not a component of our ongoing income or expenses and may have a disproportionate positive or negative impact on the results of our ongoing underlying business.
		For the Years Ended December 31,
		2014			2013			2012
	Revenue:
	North America	$	1,248.80		$	1,233.90		$	1,225.60
	Asia Pacific	181.7			178.3			174.2
	Europe and Other International Markets	251.2			241.4			241.2
	Consolidated Core	1,681.70			1,653.60			1,641.00
	Divested and Other Businesses	0.1			1.6			22
	Consolidated Total	$	1,681.80		$	1,655.20		$	1,663.00
	Operating Income (Loss):
	North America	$	397.8		$	407.4		$	480.9
	Asia Pacific	28.8			19			4.7
	Europe and Other International Markets	75.3			72.9			68.8
	Total Segments	501.9			499.3			554.4
	Corporate and Other (1)	(80.4		)	(62.2		)	(122.3		)
	Consolidated Total	421.5			437.1			432.1
	Non-Operating Income (Expense) – Net	(72.9		)	(41.1		)	(53.8		)
	Income Before Provision for Income Taxes and Equity in Net Income of Affiliates	$	348.6		$	396		$	378.3
	Depreciation and Amortization (2):
	North America	$	34.8		$	41.6		$	41.8
	Asia Pacific	13.3			14.4			17.2
	Europe and Other International Markets	12.2			12.2			13
	Total Segments	60.3			68.2			72
	Corporate and Other	2.8			3			6.3
	Consolidated Total	$	63.1		$	71.2		$	78.3
	Capital Expenditures (3):
	North America	$	7.6		$	3.7		$	2.2
	Asia Pacific	3.4			3.2			4.4
	Europe and Other International Markets	0.6			1.9			0.3
	Total Segments	11.6			8.8			6.9
	Corporate and Other	0.6			0.7			0.1
	Consolidated Total	$	12.2		$	9.5		$	7
	Additions to Computer Software and Other Intangibles (4):
	North America	$	22.7		$	25		$	21.2
	Asia Pacific	5.3			4.4			5.4
	Europe and Other International Markets	5.6			6.7			6.7
	Total Segments	33.6			36.1			33.3
	Corporate and Other	8.1			9.5			34.1
	Consolidated Total	$	41.7		$	45.6		$	67.4
			At December 31,
			2014			2013			2012
	Assets (5):
	North America		$	821.1		$	843.2		$	795.4
	Asia Pacific		355.8			371.9			414.6
	Europe and Other International Markets		488.8			445.4			365.7
	Total Segments		1,665.70			1,660.50			1,575.70
	Corporate and Other (primarily taxes)		320.5			229.8			416.1
	Consolidated Total		$	1,986.20		$	1,890.30		$	1,991.80
	Goodwill (6):
	North America		$	268.5		$	265.1		$	266.5
	Asia Pacific		199.9			210.2			234
	Europe and Other International Markets		106.8			113.8			110.6
	Consolidated Total		$	575.2		$	589.1		$	611.1
	-1	The following table summarizes “Corporate and Other:”
	For the Years Ended December 31,
	2014			2013			2012
Corporate Costs (a)	$	(62.0	)	$	(40.9	)	$	(49.1	)
Restructuring Expense	(14.9		)	(13.9		)	(29.4		)
Strategic Technology Investment or MaxCV	—			—			(30.3		)
Legal Fees and Other Shut-Down Costs Associated with Matters in China	(3.5		)	(7.4		)	(13.5		)
Total Corporate and Other	$	(80.4	)	$	(62.2	)	$	(122.3	)
(a) The increase of $21.1 million in Corporate Costs for the year ended December 31, 2014 as compared to December 31, 2013
was primarily due to higher compensation and professional costs in 2014 associated with our strategic activities.
-2	Includes depreciation and amortization of Property, Plant and Equipment, Computer Software and Other Intangibles.
The decrease of $8.1 million for the year ended December 31, 2014 as compared to December 31, 2013 was primarily attributed to lower software amortization in 2014 in the North America segment as a result of the impairment of technology software assets in the fourth quarter of 2013 related to our data management infrastructure (data supply chain).
The decrease of $7.1 million for the year ended December 31, 2013 as compared to December 31, 2012 was primarily attributed to software assets that became fully depreciated in 2012 and the divestiture of the domestic portion of our Japanese operations to TSR Ltd.
-3	The increase of $3.9 million in capital expenditures in the North America segment for the year ended December 31, 2014 as compared to December 31, 2013 was primarily driven by the purchase of computer hardware related to the DNBi infrastructure upgrade.
-4	The decrease of $2.3 million in additions to computer software and other intangibles in the North America segment for the year ended December 31, 2014 as compared to December 31, 2013 was mainly due to nonrecurring purchases in the prior year related to MaxCV.
The increase of $3.8 million in additions to computer software and other intangibles in the North America segment for the year ended December 31, 2013 as compared to December 31, 2012 was mainly attributed to the purchase of perpetual licenses of third-party software.
The decrease of $24.6 million in additions to computer software and other intangibles in “Corporate and Other” for the year ended December 31, 2013 as compared to December 31, 2012 was primarily due to our then non-recurring Strategic Technology Investment or MaxCV related software additions that occurred in the prior year.
-5	The decrease in assets in the North America segment to $821.1 million at December 31, 2014 from $843.2 million at December 31, 2013 was primarily due to normal software amortization and the impairment charge related to the sale of the Parsippany, New Jersey building.
The increase in assets in the North America segment to $843.2 million at December 31, 2013 from $795.4 million at December 31, 2012 was primarily due to increases in cash and computer software. The increase in cash was mainly a function of timing, while the increase in computer software was primarily due to the purchase of perpetual licenses of third-party software.
The decrease in assets in the Asia Pacific segment to $355.8 million at December 31, 2014 from $371.9 million and $414.6 million at December 31, 2013 and 2012, respectively, was primarily due to the negative impact of foreign currency translation.
The increase in assets in the Europe and Other International Markets segment to $488.8 million at December 31, 2014 from $445.4 million and $365.7 million at December 31, 2013 and 2012, respectively, was primarily due to an increase in cash as a result of operational performance in the region.
The increase in assets in “Corporate and Other” to $320.5 million at December 31, 2014 from $229.8 million at December 31, 2013 was primarily due to increased deferred tax assets as a result of the remeasurement of our pension plan obligations in the fourth quarter of 2014.
The decrease in assets in “Corporate and Other” to $229.8 million at December 31, 2013 from $416.1 million at December 31, 2012 was primarily due to reduced deferred tax assets as a result of the remeasurement of our pension plan obligations in the fourth quarter of 2013 and a reduction in cash.
-6	Goodwill in the North America segment increased to $268.5 million at December 31, 2014 from $265.1 million at December 31, 2013. The increase was primarily a result of two small acquisitions.
Goodwill in the Asia Pacific segment decreased to $199.9 million at December 31, 2014 from $210.2 million and $234.0 million at December 31, 2013 and, 2012, respectively. This decrease was primarily due to the negative impact of foreign currency translation.
Goodwill in the Europe and Other International Markets decreased to $106.8 million at December 31, 2014 from $113.8 million at December 31, 2013, primarily due to the negative impact of foreign currency translation.
Supplemental Geographic and Customer Solution Set Information:
		At December 31,
		2014			2013			2012
Long-Lived Assets (7):
North America		$	400.1		$	453.5		$	484.3
Asia Pacific		270.5			290			333.9
Europe and Other International Markets		147.6			162.8			164.9
Consolidated Total		$	818.2		$	906.3		$	983.1
-7	Long-lived assets in North America decreased to $400.1 million at December 31, 2014 from $453.5 million at December 31, 2013. This decline was primarily driven by a reduction of a contractual receipt under a tax allocation agreement between Moody’s Corporation and Dun & Bradstreet as it relates to the effective settlement of audits for the 2007 - 2009 tax years and the expiration of a statute of limitations for the 2010 tax year, normal software amortization, and the impairment charge related to the sale of the Parsippany, New Jersey building. In addition, the remaining asset balance for the Parsippany, New Jersey building was reclassified to “Current Asset Held For Sale.”
Long-lived assets in North America decreased to $453.5 million at December 31, 2013 from $484.3 million at December 31, 2012. This decrease was due to an impairment charge primarily related to technology and software assets that were primarily related to our data management infrastructure (data supply chain). We can improve data collection through other commercially available means, as needed.
Long-lived assets in the Asia Pacific segment decreased to $270.5 million at December 31, 2014 from $290.0 million and $333.9 million at December 31, 2013, and 2012, respectively. This was primarily attributable to the negative impact of foreign currency translation.
Long-lived assets in Europe and Other International Markets decreased to $147.6 million at December 31, 2014 from $162.8 million at December 31, 2013, primarily due to the negative impact of foreign currency translation.
	For the Years Ended December 31,
	2014			2013			2012
Customer Solution Set Revenue:
North America:
Risk Management Solutions	$	691.7		$	693.2		$	700.6
Sales & Marketing Solutions	557.1			540.7			525
North America Core Revenue	1,248.80			1,233.90			1,225.60
Divested and Other Businesses (8)	—			—			—
Total North America Revenue	$	1,248.80		$	1,233.90		$	1,225.60
Asia Pacific:
Risk Management Solutions	$	158.9		$	154.5		$	147.5
Sales & Marketing Solutions	22.8			23.8			26.7
Asia Pacific Core Revenue	181.7			178.3			174.2
Divested and Other Businesses (8)	—			1			21.3
Total Asia Pacific Revenue	$	181.7		$	179.3		$	195.5
Europe and Other International Markets:
Risk Management Solutions	$	204.2		$	197.7		$	198.8
Sales & Marketing Solutions	47			43.7			42.4
Europe and Other International Markets Core Revenue	251.2			241.4			241.2
Divested and Other Businesses (8)	0.1			0.6			0.7
Total Europe and Other International Markets Revenue	$	251.3		$	242		$	241.9
Consolidated Total:
Risk Management Solutions	$	1,054.80		$	1,045.40		$	1,046.90
Sales & Marketing Solutions	626.9			608.2			594.1
Core Revenue	1,681.70			1,653.60			1,641.00
Divested and Other Businesses (8)	0.1			1.6			22
Consolidated Total Revenue	$	1,681.80		$	1,655.20		$	1,663.00
(8) During the year ended December 31, 2014, we ceased the operations of our small Ireland Corporation Registry Business. This business has been classified as “Divested and Other Businesses.”
During the year ended December 31, 2013, we ceased the operations of our India Event Planning and Rural Marketing Businesses. During the year ended December 31, 2012, we completed (a) the sale of: (i) the domestic portion of our Japanese operations to TSR Ltd.; (ii) our market research business in China, consisting of two joint venture companies; and (iii) a research and advisory services business in India; and (b) the shut-down of our Roadway operations. These businesses have been classified as “Divested and Other Businesses.” These Divested and Other Businesses contributed less than 1% and 11% to our Asia Pacific total revenue for the years ended December 31, 2013 and 2012, respectively.
During the year ended December 31, 2012, we completed the sale of: (i) AllBusiness.com, Inc.; (ii) Purisma Incorporated; and (iii) a small supply management company. These businesses have been classified as “Divested and Other Businesses.”
The following table represents Divested and Other Businesses revenue by solution set:
	For the Years Ended December 31,
	2014			2013			2012
Divested and Other Businesses:
Risk Management Solutions	$	0.1		$	0.6		$	10
Sales & Marketing Solutions	—			1			12
Total Divested and Other Businesses Revenue	$	0.1		$	1.6		$	22

Supplemental_Financial_Data

Supplemental Financial Data	12 Months Ended
	Dec. 31, 2014
Supplemental Financial Information [Abstract]
Supplemental Financial Data	Supplemental Financial Data
	Other Accrued and Current Liabilities:
		At December 31,
		2014				2013
	Restructuring Accruals	$	9.9			$	10.4
	Professional Fees	31.4				34.6
	Operating Expenses	43.2				39
	Other Accrued Liabilities	29.7				32.1
		$	114.2			$	116.1
	Property, Plant and Equipment – Net:
			At December 31,
			2014				2013
	Land		$	1.1			$	5.7
	Buildings		23.7				33.5
	Furniture		60.8				59.5
			85.6				98.7
	Less: Accumulated Depreciation		66.2				68.3
			19.4				30.4
	Leasehold Improvements, less:
	Accumulated Amortization of $16.5 and $15.6 as of December 31, 2014 and 2013, respectively		8				9.2
	Property, Plant and Equipment – Net (1)		$	27.4			$	39.6
	-1	The decrease in Property, Plant and Equipment – Net is primarily due to reclassification to "Current Assets Held for Sale" for the Parsippany, New Jersey building. See Note 1 and Note 7 to our consolidated financial statements included in this Annual Report on Form 10-K for further detail.
	Other Income (Expense) – Net:
			For the Years Ended December 31,
			2014				2013			2012
	Effect of Legacy Tax Matters (2)		$	(28.6	)		$	0.8		$	(14.8	)
	Gain (Loss) on Sale of Businesses (3)		—				—			6.1
	Miscellaneous Other Income (Expense) – Net (4)		(2.7		)		(2.5		)	(6.4		)
	Other Income (Expense) – Net		$	(31.3	)		$	(1.7	)	$	(15.1	)
	-2	During the year ended December 31, 2014, we recognized the reduction of a contractual receipt under a tax allocation agreement between Moody's Corporation and Dun & Bradstreet as it relates to the effective settlement of audits for the 2007 - 2009 tax years and the expiration of a statute of limitations for the 2010 tax year. During the year ended December 31, 2012, we recognized the reduction of a contractual receipt under a tax allocation agreement between Moody's Corporation and Dun & Bradstreet as it relates to the expiration of the statute of limitations for the tax years 2005 and 2006.
	-3	During the year ended December 31, 2012, we recognized gains primarily related to the sale of: (i) the domestic portion of our Japanese operations to TSR Ltd.; (ii) Purisma Incorporated; and (iii) our market research business in China, consisting of two joint venture companies.
	-4	Miscellaneous Other Income (Expense) - Net decreased for the year ended December 31, 2013 compared to the year ended December 31, 2012, primarily due to one-time costs of $5.8 million incurred in 2012 to accelerate the redemption of our senior notes with a face value of $400 million that were scheduled to mature on April 1, 2013, partially offset by the negative impact of foreign currency translation.
	Computer Software and Goodwill:
			Computer Software				Goodwill
	1-Jan-13		$	140.9			$	611.1
	Additions at Cost (5)		43.5				—
	Amortization		(46.9		)		—
	Write-offs (6)		(31.3		)		—
	Other (7)		1.7				(22.0		)
	31-Dec-13		107.9				589.1
	Additions at Cost (8)		39.6				7.3
	Amortization		(39.7		)		—
	Write-offs		(1.2		)		—
	Other (7)		(2.9		)		(21.2		)
	31-Dec-14		$	103.7			$	575.2
	(5) Computer Software - Amount mainly due to the purchase of perpetual licenses of third party software.
	-6	Computer Software - This decrease is due to impairment charges primarily related to (i) technology and software assets that were primarily related to our data management infrastructure (data supply chain) in our North America segment. We can improve data collection through other commercially available means, as needed; and (ii) our China Trade Portal (“Portal”) asset in our Asia Pacific segment resulting from lower than expected product revenue. We decided to sunset the Portal product and migrate our existing Portal customers to an enhanced version of our existing DUNS Registered Seal product.
	(7) Computer Software and Goodwill - Primarily due to the impact of foreign currency fluctuations.
	(8) Computer Software and Goodwill:
	Computer Software - Primarily due to software related enhancements on Dun & Bradstreet products and the purchase of
	third party licenses.
	Goodwill - Related to two immaterial acquisitions.
	Other Intangibles (included in Non-Current Assets):
			Customer Relationships				Trademark and Other			Total
	January 1, 2013		$	29.6			$	69.7		$	99.3
	Additions		—				0.6			0.6
	Amortization		(4.1		)		(11.7		)	(15.8		)
	Write-offs		—				(0.4		)	(0.4		)
	Other (9)		5.5				(12.5		)	(7.0		)
	December 31, 2013 (10)		31				45.7			76.7
	Acquisitions		0.8				0.5			1.3
	Additions		—				1.1			1.1
	Amortization		(4.0		)		(11.1		)	(15.1		)
	Other		(1.1		)		(1.3		)	(2.4		)
December 31, 2014 (10)		$	26.7			$	34.9		$	61.6
(9) During the year ended December 31, 2013 we reclassified assets between Trademark and Other and Customer Relationships. In addition, the amount includes the negative impact of foreign currency translation.
(10) Customer Relationships - Includes accumulated amortization of $17.1 million and $13.8 million as of
December 31, 2014 and 2013, respectively.
Trademark and Other - Includes accumulated amortization of $86.9 million and $78.2 million as of December
31, 2014 and 2013, respectively.
Allowance for Doubtful Accounts:
1-Jan-12		$	17.1
Additions charged to costs and expenses		15.2
Write-offs		(7.2		)
Recoveries		2.1
Other		0.1
31-Dec-12		27.3
Additions charged to costs and expenses		3
Write-offs		(9.7		)
Recoveries		3.2
Other		0.1
31-Dec-13		23.9
Additions charged to costs and expenses		1.8
Write-offs		(6.0		)
Recoveries		1.5
Other		(0.2		)
31-Dec-14		$	21
Deferred Tax Asset Valuation Allowance:
1-Jan-12		$	38.1
Additions charged (credited) to costs and expenses		(1.6		)
Additions charged (credited) due to foreign currency fluctuations		—
Additions charged (credited) to other accounts		(1.1		)
31-Dec-12		35.4
Additions charged (credited) to costs and expenses		2.7
Additions charged (credited) due to foreign currency fluctuations		1.2
Additions charged (credited) to other accounts		(1.0		)
31-Dec-13		38.3
Additions charged (credited) to costs and expenses		1.9
Additions charged (credited) due to foreign currency fluctuations		(2.6		)
Additions charged (credited) to other accounts		(0.7		)
31-Dec-14		$	36.9

Quarterly_Financial_Informatio

Quarterly Financial Information	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information	Quarterly Financial Data (Unaudited)
		For the Three Months Ended
		March 31,			June 30,			September 30,			December 31,			Full Year
	2014
	Revenue:
	North America	$	279		$	284.6		$	305.3		$	379.9		$	1,248.80
	Asia Pacific	41.7			46.4			47.2			46.4			181.7
	Europe and Other International Markets	61.2			62			64.6			63.5			251.3
	Consolidated Revenue	$	381.9		$	393		$	417.1		$	489.8		$	1,681.80
	Operating Income (Loss):
	North America	$	78		$	79.9		$	88.2		$	151.7		$	397.8
	Asia Pacific	6.2			7.7			7.7			7.2			28.8
	Europe and Other International Markets	16.7			18.2			19.4			21			75.3
	Total Segments	100.9			105.8			115.3			179.9			501.9
	Corporate and Other (1)	(18.6		)	(20.8		)	(18.5		)	(22.5		)	(80.4		)
	Consolidated Operating Income	82.3			85			96.8			157.4			421.5
	Net Income	86			50.9			68.4			92.6			297.9
	Less: Net (Income) Loss Attributable to the Noncontrolling Interest	(0.7		)	(1.0		)	(0.9		)	(0.9		)	(3.5		)
	Net Income Attributable to Dun & Bradstreet	$	85.3		$	49.9		$	67.5		$	91.7		$	294.4
	Basic Earnings Per Share of Common Stock Attributable to Dun & Bradstreet Common Shareholders (2)	$	2.28		$	1.36		$	1.87		$	2.55		$	8.06
	Diluted Earnings Per Share of Common Stock Attributable to Dun & Bradstreet Common Shareholders (2)	$	2.26		$	1.35		$	1.85		$	2.53		$	7.99
	Cash Dividends Paid Per Common Share	$	0.44		$	0.44		$	0.44		$	0.44		$	1.76
		For the Three Months Ended
		March 31,			June 30,			September 30,			December 31,			Full Year
	2013
	Revenue:
	North America	$	283.2		$	278.7		$	305.8		$	366.2		$	1,233.90
	Asia Pacific	41.4			49.3			44.4			44.2			179.3
	Europe and Other International Markets	56.4			58.4			60.9			66.3			242
	Consolidated Revenue	$	381		$	386.4		$	411.1		$	476.7		$	1,655.20
	Operating Income (Loss):
	North America	$	86		$	84.5		$	112.3		$	124.6		$	407.4
	Asia Pacific	2.4			8.4			5.1			3.1			19
	Europe and Other International Markets	14			15.7			19.7			23.5			72.9
	Total Segments	102.4			108.6			137.1			151.2			499.3
	Corporate and Other (1)	(14.6		)	(14.7		)	(16.6		)	(16.3		)	(62.2		)
	Consolidated Operating Income	87.8			93.9			120.5			134.9			437.1
	Net Income	53.6			58.4			73.5			76.6			262.1
	Less: Net (Income) Loss Attributable to the Noncontrolling Interest	(0.7		)	(0.9		)	(0.7		)	(1.3		)	(3.6		)
	Net Income Attributable to Dun & Bradstreet	$	52.9		$	57.5		$	72.8		$	75.3		$	258.5
	Basic Earnings Per Share of Common Stock Attributable to Dun & Bradstreet Common Shareholders (2)	$	1.3		$	1.46		$	1.89		$	1.98		$	6.61
	Diluted Earnings Per Share of Common Stock Attributable to Dun & Bradstreet Common Shareholders (2)	$	1.29		$	1.44		$	1.87		$	1.96		$	6.54
	Cash Dividends Paid Per Common Share	$	0.4		$	0.4		$	0.4		$	0.4		$	1.6
	-1	The following table itemizes the components of the “Corporate and Other” category of Operating Income (Loss):
		For the Three Months Ended
		March 31,			June 30,			September 30,			December 31,			Full Year
	2014
	Corporate Costs	$	(13.4	)	$	(14.6	)	$	(15.3	)	(18.7		)	$	(62.0	)
	Restructuring Expense	(4.9		)	(5.0		)	(2.0		)	(3.0		)	(14.9		)
	Legal and Other Professional Fees and Shut-Down Costs Related to Matters in China	(0.3		)	(1.2		)	(1.2		)	(0.8		)	(3.5		)
	Total Corporate and Other	$	(18.6	)	$	(20.8	)	$	(18.5	)	$	(22.5	)	$	(80.4	)
		For the Three Months Ended
		March 31,			June 30,			September 30,			December 31,			Full Year
	2013
	Corporate Costs	$	(10.7	)	$	(8.8	)	$	(9.6	)	$	(11.8	)	$	(40.9	)
	Restructuring Expense	(2.3		)	(2.2		)	(6.1		)	(3.3		)	(13.9		)
	Legal and Other Professional Fees and Shut-Down Costs Related to Matters in China	(1.6		)	(3.7		)	(0.9		)	(1.2		)	(7.4		)
	Total Corporate and Other	$	(14.6	)	$	(14.7	)	$	(16.6	)	$	(16.3	)	$	(62.2	)
	-2	The number of weighted average shares outstanding changes as common shares are issued for employee benefit plans and other purposes or as shares are repurchased. For this reason, the sum of quarterly earnings per share may not be the same as earnings per share for the year.

Divestitures_and_Other_Busines

Divestitures and Other Businesses	12 Months Ended
	Dec. 31, 2014
Text Block [Abstract]
Divestitures and Other Businesses	Divestitures and Other Businesses
	India Research and Advisory Services Business
	In September 2012, we sold substantially all of the assets and liabilities of our India Research and Advisory Services business for $0.5 million. As a result, we recorded a pre-tax gain of $0.2 million in “Other Income (Expense) - Net” in the consolidated statement of operations and comprehensive income during the year ended December 31, 2012. The India Research and Advisory Services business generated approximately $1.3 million in revenue during 2011.
	Shanghai Roadway D&B Marketing Services Co. Ltd.
	On March 18, 2012, we announced we had temporarily suspended our Roadway operations in China, pending an investigation into allegations that its data collection practices may have violated local Chinese consumer data privacy laws. Thereafter, the Company decided to permanently cease the operations of Roadway. In addition, we have been reviewing certain allegations that we may have violated the Foreign Corrupt Practices Act and certain other laws in our China operations. As previously reported, we have voluntarily contacted the SEC and the DOJ to advise both agencies of our investigation, and we are continuing to meet with the representatives of both the SEC and DOJ in connection therewith. Our investigation remains ongoing and is being conducted at the direction of the Audit Committee.
	On September 28, 2012, Roadway was charged in a Bill of Prosecution, along with five former employees, by the Shanghai District Prosecutor with illegally obtaining private information of Chinese citizens. On December 28, 2012, the Chinese court imposed a monetary fine on Roadway and fines and imprisonment for four former Roadway employees. A fifth former Roadway employee was separated from the case.
	For the years ended December 31, 2014 and 2013, we incurred $3.7 million and $7.4 million, respectively, of legal and other professional fees related to matters in China. Additionally, during the year ended December 31, 2012, we incurred $13.5 million of legal and other professional fees and $2.1 million in local shut-down costs, as well as an impairment charge of $12.9 million related to accounts receivable, intangible assets, prepaid costs and software for Roadway, an operation in our Greater China reporting unit. For the year ended December 31, 2012, the Roadway operations had $5.4 million of revenue and $14.5 million of operating loss. Dun & Bradstreet acquired Roadway’s operations in 2009, and for 2011 Roadway accounted for approximately $22 million in revenue and $2 million in operating income.
	Domestic Portion of our Japanese Joint Venture
	In February 2012, we completed the sale of the domestic portion of our Japan operations to TSR Ltd., our local joint venture partner since December 2007, for $4.5 million. As a result, we recorded a pre-tax gain of $3.0 million in “Other Income (Expense) - Net” in the consolidated statement of operations and comprehensive income during the year ended December 31, 2012. Our domestic Japanese operations generated approximately $64 million in revenue during 2011.
	Simultaneously with closing this transaction, we entered into a ten-year commercial arrangement to provide TSR Ltd. with global data for its Japanese customers and to become the exclusive distributor of TSR Ltd. data to the Worldwide Network. From the date of this transaction in February 2012, this arrangement has aggregate future cash payments of approximately $140 million.
	AllBusiness.com, Inc.
	In February 2012, we completed the sale of AllBusiness.com, Inc., a U.S. entity included in our North American reporting segment, for $0.4 million. As a result, we recorded a pre-tax loss of $0.4 million in “Other Income (Expense) - Net” in the consolidated statement of operations and comprehensive income during the year ended December 31, 2012. AllBusiness.com, Inc. generated approximately $4 million in revenue during 2011.
	Chinese Market Research Joint Ventures
	In January 2012, we completed the sale of our market research business in China, consisting of two joint venture companies, by selling our equity interests in such companies to our partner for a total purchase price of $5.0 million. As a result, we recorded a pre-tax gain of $1.4 million in “Other Income (Expense) - Net” in the consolidated statement of operations and comprehensive income during the year ended December 31, 2012. The joint ventures generated approximately $16 million in revenue during 2011.
	Purisma Incorporated
	In January 2012, we completed the sale of Purisma Incorporated, a U.S. entity included in our North American reporting segment, for $2.0 million. As a result, we recorded a pre-tax gain of $2.0 million in “Other Income (Expense) - Net” in the consolidated statement of operations and comprehensive income during the year ended December 31, 2012. Purisma Incorporated generated approximately $4 million in revenue during 2011.

Subsequent_Events

Subsequent Events (USD $)	12 Months Ended
	Dec. 31, 2014	Feb. 28, 2015
Subsequent Event [Line Items]
Subsequent Events	Subsequent Events
	Dividend Declaration
	In February 2015, we approved the declaration of a dividend of $0.4625 per share of common stock for the first quarter of 2015. This cash dividend will be payable on March 11, 2015 to shareholders of record at the close of business on February 24, 2015.
	Acquisition
	On January 5, 2015, we acquired NetProspex for approximately $125 million, net of cash acquired. NetProspex is based out of Waltham, Massachusetts and is a B2B professional contact and data management business. The addition of the NetProspex Workbench data services platform and CleneStepTM methodology to our global commercial database will further enable customers to better understand their ideal customers, identify and prioritize opportunities, and grow their business. From the date of acquisition, NetProspex will be included in our consolidated financial statements.
Scenario, Forecast [Member]
Subsequent Event [Line Items]
Dividends Payable, Amount Per Share		$0.46

Description_of_Business_and_Su1

Description of Business and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Consolidation	Basis of Presentation. The preparation of financial statements and related disclosures in conformity with accounting principles generally accepted in the United States of America (“GAAP”) requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the period reported. As discussed throughout this Note 1, we base our estimates on historical experience, current conditions and various other factors that we believe to be reasonable under the circumstances. Significant items subject to such estimates and assumptions include: valuation allowances for receivables and deferred income tax assets; liabilities for potential tax exposure and potential litigation claims and settlements; assets and obligations related to employee benefits; allocation of the purchase price in acquisition accounting; impairment assessment for goodwill and other intangible assets; long-term asset and amortization recoverability; stock-based compensation; revenue deferrals; and restructuring charges. We review estimates and assumptions periodically and reflect the revisions in the consolidated financial statements in the period in which we determine any revisions to be necessary. Actual results could differ materially from those estimates under different assumptions or conditions.
	The consolidated financial statements include our accounts, as well as those of our subsidiaries and investments in which we have a controlling interest. Investments in companies over which we have significant influence but not a controlling interest are recorded under the equity method of accounting. Investments over which we do not have significant influence are recorded under the cost method of accounting. We periodically review our investments to determine if there has been any impairment judged to be other than temporary. Such impairments are recorded as write-downs in the consolidated statements of operations and comprehensive income.
	All intercompany transactions and balances have been eliminated in consolidation.
Segments	Through December 31, 2014, we managed and reported our business through the following three segments:
	•	North America (which consists of our operations in the U.S. and Canada);
	•	Asia Pacific (which primarily consists of our operations in Australia, Greater China, India and Asia Pacific Worldwide Network); and
	•	Europe and other International Markets (which primarily consists of our operations in the United Kingdom ("U.K."), the Netherlands, Belgium, Latin America and our European Worldwide Network).
	To further align with our strategy, we began reporting our business as of January 1, 2015 through two segments:
	•	Americas (which consists of our operations in the U.S., Canada and Latin America); and
	•	Non Americas (which primarily consists of our operations in the U.K., the Netherlands, Belgium, Australia, Greater China, India and our Worldwide Network).
	In addition to the changes in our segment reporting that became effective January 1, 2015 that further align our external reporting with our strategy, we also began reporting and monitoring the performance of our Risk Management Solutions as Trade Credit and Other Enterprise Risk Management, and the results of our Sales & Marketing Solutions as Traditional Prospecting Solutions and Advanced Marketing Solutions. Trade Credit represents our traditional commercial credit products such as DNBi. Other Enterprise Risk Management includes all of our remaining Risk Management products, such as our compliance, supply chain and D&B Direct risk solutions. Traditional Prospecting Solutions includes our Hoovers, Market Data Retrieval (“MDR”) and marketing list solutions. Advanced Marketing Solutions includes all of our remaining Sales & Marketing Solutions products including Optimizer and DaaS (Customer Relationship Management ("CRM") and D&B Direct sales and marketing solutions).
	The financial statements of the subsidiaries outside North America reflect a fiscal year ended November 30 in order to facilitate the timely reporting of our consolidated financial results and consolidated financial position.
Revenue Recognition	Revenue Recognition. Revenue is recognized when the following four conditions are met:
	•	Persuasive evidence of an arrangement exists;
	•	The contract fee is fixed or determinable;
	•	Delivery or performance has occurred; and
	•	Collectability is reasonably assured.
	If at the outset of an arrangement, we determine that collectability is not reasonably assured, revenue is deferred until the earlier of when collectability becomes probable or the receipt of payment. If there is uncertainty as to the customer’s acceptance of our deliverables, revenue is not recognized until the earlier of receipt of customer acceptance or expiration of the acceptance period. If at the outset of an arrangement, we determine that the arrangement fee is not fixed or determinable, revenue is deferred until the arrangement fee becomes fixed or determinable, assuming all other revenue recognition criteria have been met.
	Our Risk Management Solutions are generally sold under fixed price subscription contracts that allow customers unlimited access to risk information. Revenue on this type of contract is recognized ratably over the term of the contract.
	Risk information is also sold using monthly or annual contracts that allow customers to purchase our risk information up to the contract amount based on an agreed price list. Once the contract amount is fully used, additional risk information can be purchased at per-item prices, which may be different than those in the original contract. Revenue on these contracts is recognized on a per-item basis as information is purchased and delivered to the customer. If customers do not use the full amount of their contract and forfeit the unused portion, we recognize the forfeited amount as revenue at contract expiration.
	Where a data file of risk information is sold with periodic updates to that information, a portion of the revenue related to the updates is deferred as a liability on the balance sheet and recognized as the updates are delivered, usually on a quarterly or monthly basis over the term of the contract.
	Revenue related to services, such as monitoring, is recognized ratably over the period of performance.
	Sales & Marketing Solutions that provide continuous access to our marketing information and business reference databases may include access or hosting fees which are sold on a subscription basis. Revenue is recognized ratably over the term of the contract, which is typically one year.
	Where a data file of marketing information is sold, we recognize revenue upon delivery of the marketing data file to the customer. If the contract provides for periodic updates to that marketing data file, the portion of the revenue related to updates is deferred as a liability on the balance sheet and recognized as the updates are delivered, usually on a quarterly or monthly basis over the term of the contract.
	Sales of software that are considered to be more than incidental are recognized in revenue when a noncancelable license agreement has been signed and the software has been shipped and installed, if required.
	Revenue from consulting and training services is recognized as the services are performed.
	Multiple Element Arrangements
	We have certain solution offerings that are sold as multi-element arrangements. The multiple element arrangements or deliverables may include access to our business information database, information data files, periodic data refreshes, software and services. We evaluate each deliverable in an arrangement to determine whether it represents a separate unit of accounting. Most product and service deliverables qualify as separate units of accounting and can be sold stand-alone or in various combinations across our markets. A deliverable constitutes a separate unit of accounting when it has stand-alone value and there are no customer-negotiated refunds or return rights for the delivered items. If the arrangement includes a customer-negotiated refund or return right relative to the delivered items, and the delivery and performance of the undelivered item is considered probable and substantially in our control, the delivered item constitutes a separate unit of accounting.
	If the deliverable or a group of deliverables meet the separation criteria, the total arrangement consideration is allocated to each unit of accounting based on its relative selling price. The amount of arrangement consideration that is allocated to a delivered unit of accounting is limited to the amount that is not contingent upon the delivery of another unit of accounting.
	We use a hierarchy to determine the selling price to be used for allocating revenue to deliverables: (i) vendor-specific objective evidence of selling prices (“VSOE”); (ii) third-party evidence of selling price (“TPE”); and (iii) best estimated selling prices (“BESP”) of each element. We determine the selling price for each deliverable using VSOE, if it exists, TPE if VSOE does not exist, or BESP if neither VSOE nor TPE exist. Revenue allocated to each element is then recognized when the basic revenue recognition criteria are met for each element.
	We determine VSOE of a deliverable by monitoring the price at which we sell the deliverable on a stand-alone basis to third parties or from the stated renewal rate for the elements contained in the initial arrangement. In certain instances, we are not able to establish VSOE for all deliverables in an arrangement with multiple elements. This may be due to us infrequently selling each element separately, not pricing products or services within a set range, or only having a limited sales history. Where we are unable to establish VSOE, we may use the price at which we or a third party sell a similar product to similarly situated customers on a stand-alone basis. Generally, our offerings contain a level of differentiation such that comparable pricing of solutions with similar functionality or delivery cannot be obtained. Furthermore, we are rarely able to reliably determine what similar competitors’ selling prices are on a stand-alone basis. Therefore, we typically are not able to determine TPE of selling price.
	When we are unable to establish selling prices by using VSOE or TPE, we establish the BESP in our allocation of arrangement consideration. The objective of BESP is to determine the price at which we would transact a sale if the solution were sold on a stand-alone basis. The determination of BESP is based on our review of available data points and consideration of factors such as but not limited to pricing practices, our growth strategy, geographies and customer segment and market conditions. The determination of BESP is made through consultation with and formal approval of our management, taking into consideration our go-to-market strategy.
	We regularly review VSOE and have a review process for TPE and BESP and maintain internal controls over the establishment and updates of these estimates.
	Deferred revenue consists of amounts billed in excess of revenue recognized on sales of our information solutions and generally relates to deferral of subscription revenue. Deferred revenue is included in current liabilities in the balance sheet and is subsequently recognized as revenue in accordance with our revenue recognition policies.
	We record revenue on a net basis for those sales where we act as an agent or broker in the transaction.
Sales Cancellations	Sales Cancellations. In determining sales cancellation allowances, we analyze historical trends, customer-specific factors and current economic trends. Based on this information, we record an allowance as appropriate.
Restructuring Charges	Restructuring Charges. Restructuring charges have been recorded in accordance with Accounting Standards Codification (“ASC”) 712-10, “Nonretirement Postemployment Benefits,” or “ASC 712-10,” and/or ASC 420-10, “Exit or Disposal Cost Obligations,” or “ASC 420-10,” as appropriate.
	We record severance costs provided under an ongoing benefit arrangement once they are both probable and estimable in accordance with the provisions of ASC 712-10.
	We account for one-time termination benefits, contract terminations and/or costs to terminate lease obligations less assumed sublease income in accordance with ASC 420-10, which addresses financial accounting and reporting for costs associated with restructuring activities. Under ASC 420-10, we establish a liability for a cost associated with an exit or disposal activity, including severance and lease termination obligations, and other related costs, when the liability is incurred, rather than at the date that we commit to an exit plan. We reassess the expected cost to complete the exit or disposal activities at the end of each reporting period and adjust our remaining estimated liabilities, if necessary.
	The determination of when we accrue for severance costs and which standard applies depends on whether the termination benefits are provided under an ongoing arrangement as described in ASC 712-10 or under a one-time benefit arrangement as defined by ASC 420-10. Inherent in the estimation of the costs related to the restructurings are assessments related to the most likely expected outcome of the significant actions to accomplish the exit activities. In determining the charges related to the restructurings, we have to make estimates related to the expenses associated with the restructurings. These estimates may vary significantly from actual costs depending, in part, upon factors that may be beyond our control. We will continue to review the status of our restructuring obligations on a quarterly basis and, if appropriate, record changes to these obligations in current operations based on management’s most current estimates.
Employee Benefit Plans	Employee Benefit Plans. We provide various defined benefit plans to our employees as well as healthcare benefits to our retired employees. We use actuarial assumptions to calculate pension and benefit costs as well as pension assets and liabilities included in the consolidated financial statements. See Note 10 to the consolidated financial statements included in this Annual Report on Form 10-K for further detail.
Income Taxes and Tax Contingencies	Income Taxes and Tax Contingencies. In determining taxable income for financial statement purposes, we must make certain estimates and judgments. These estimates and judgments affect the determination of the recoverability of certain of the deferred tax assets and the calculation of certain tax liabilities, which arise from temporary differences between the tax and financial statement recognition of revenue and expense and net operating losses.
	In evaluating our ability to recover our deferred tax assets, we consider all available positive and negative evidence, including our past operating results, the existence of cumulative losses in the most recent years and our forecast of future taxable income. In estimating future taxable income, we develop assumptions, including the amount of future pre-tax operating income, the reversal of temporary differences, and the implementation of feasible and prudent tax planning strategies. These assumptions require significant judgment about the forecasts of future taxable income and are consistent with the plans and estimates we are using to manage the underlying businesses.
	We currently have recorded valuation allowances that we will maintain until it is more likely than not the deferred tax assets will be realized. Our income tax expense recorded in the future may be reduced to the extent of decreases in our valuation allowances. The realization of our remaining deferred tax assets is primarily dependent on future taxable income in the appropriate jurisdiction. Any reduction in future taxable income may require that we record an additional valuation allowance against our deferred tax assets. An increase in the valuation allowance could result in additional income tax expense in such period and could have a significant impact on our future earnings. Changes in tax laws and rates could also affect recorded deferred tax assets and liabilities in the future. Management records the effect of a tax rate or law change on our deferred tax assets and liabilities in the period of enactment. Future tax rate or law changes could have a material effect on our financial condition, results of operations or cash flows.
	In addition, the calculation of our tax liabilities involves dealing with uncertainties in the application of complex tax regulations in a multitude of jurisdictions across our global operations. We record tax liabilities for anticipated tax audit issues in the U.S. and other tax jurisdictions based on our estimate of whether, and the extent to which, additional taxes will be due. These tax liabilities are reflected net of related tax loss carry-forwards. We adjust these reserves in light of changing facts and circumstances; however, due to the complexity of some of these uncertainties, the ultimate resolution may result in a payment that is materially different from our current estimate of the tax liabilities. If our estimate of tax liabilities proves to be less than the ultimate assessment, an additional charge to expense would result. If a payment or settlement of these amounts ultimately proves to be less than the recorded amounts, the reversal of the liabilities would result in tax benefits being recognized in the period when we determine the liabilities are no longer necessary. We recognize interest and penalties related to unrecognized tax benefits within the “Provision for Income Taxes” line in the consolidated statement of operations and comprehensive income. Accrued interest and penalties are included within the “Liabilities for Unrecognized Benefits” line in the consolidated balance sheet.
Legal Contingencies	Legal Contingencies. We are involved in legal proceedings, claims and litigation arising in the ordinary course of business for which we believe we have adequate reserves, and such reserves are not material to the consolidated financial statements. In addition, from time to time we may be involved in additional matters which could become material and for which we may also establish reserve amounts as discussed in Note 13 to the consolidated financial statements included in this Annual Report on Form 10-K. We record a liability when management believes that it is both probable that a liability has been incurred and we can reasonably estimate the amount of the loss. For such matters where management believes a liability is not probable but is reasonably possible, a liability is not recorded; instead, an estimate of loss or range of loss, if material individually or in the aggregate, is disclosed if reasonably estimable, or a statement will be made that an estimate of loss cannot be made. As additional information becomes available, we adjust our assessment and estimates of such liabilities accordingly.
Cash and Cash Equivalents	Cash and Cash Equivalents. We consider all investments purchased with an initial term to maturity of three months or less to be cash equivalents. These instruments are stated at cost, which approximates market value because of the short maturity of the instruments.
Accounts Receivable and Allowance for Bad Debts	Accounts Receivable and Allowance for Bad Debts. Accounts receivable are recorded at the invoiced amount and do not bear interest. With respect to estimating the allowance for bad debts, we analyze the aging of accounts receivable, historical bad debts, customer creditworthiness and current economic trends and we record an allowance as appropriate.
Property, Plant and Equipment	Property, Plant and Equipment. Property, plant and equipment are stated at cost, except for property, plant and equipment that have been impaired for which the carrying amount is reduced to the estimated fair value at the impairment date. Property, plant and equipment are generally depreciated using the straight-line method. Buildings are depreciated over a period of 40 years. Equipment, including furniture, is depreciated over a period of three to ten years. Leasehold improvements are amortized on a straight-line basis over the shorter of the term of the lease or the estimated useful life of the improvement.
Computer Software	Computer Software. We develop various computer software applications for internal use including systems which support our databases and common business services and processes (back-end systems), our financial and administrative systems (backoffice systems) and systems which we use to deliver our information solutions to customers (customer-facing systems).
	We expense costs as incurred during the preliminary development stage which includes conceptual formulation and review of alternatives. Once that stage is complete, we begin the application development stage which includes design, coding and testing. Direct internal and external costs incurred during this stage are capitalized. Capitalization of costs cease when the software is ready for its intended use and all substantial testing is completed. Upgrades and enhancements which provide added functionality are accounted for in the same manner. Maintenance costs incurred solely to extend the life of the software are expensed as incurred. Capitalized costs for internal-use software are amortized over the estimated lives which range from three to eight years.
	We periodically reassess the estimated useful lives of our computer software considering our overall technology strategy, the effects of obsolescence, technology, competition and other economic factors on the useful life of these assets.
	Internal-use software is tested for impairment along with other long-lived assets (See Impairment of Long-Lived Assets).
	We also develop software for sale to customers. Costs are expensed until technological feasibility is established after which costs are capitalized until the software is ready for general release to customers. Costs of enhancements that extend the life or improve the marketability of the software are capitalized once technological feasibility is reached. Maintenance and customer support are expensed as incurred.
	Capitalized costs of software for sale are amortized on a straight-line basis over the estimated economic life of the software of three years. We continually evaluate recoverability of the unamortized costs, which are reported at the lower of unamortized cost or net realizable value.
Goodwill and Other Intangible Assets	Goodwill and Other Indefinite-Lived Intangible Assets. Goodwill represents the excess of costs over fair value of assets and liabilities of businesses acquired. Goodwill and intangibles with an indefinite life are not subject to regular periodic amortization. Instead, the carrying amount of the goodwill and indefinite-lived intangibles is tested for impairment at least annually and between annual tests if events or circumstances warrant such a test. An impairment loss would be recognized if the carrying amount exceeded the fair value.
	We assess recoverability of goodwill at the reporting unit level. A reporting unit is an operating segment or a component of an operating segment that is a business for which discrete financial information is available and reviewed by a segment manager. Our reporting units are North America, United Kingdom, Benelux (the Netherlands and Belgium), Europe Partnerships, Latin America, Greater China, Asia Partnerships, Australia and India. We perform a two-step goodwill impairment test. In the first step, we compare the fair value of each reporting unit to its carrying value. If the fair value of the reporting unit exceeds the carrying value of the net assets, including goodwill assigned to that reporting unit, goodwill is not impaired and no further test is performed. However, if the carrying value of the net assets assigned to the reporting unit exceeds the fair value of the reporting unit, the second step of the impairment test is performed to determine the magnitude of the impairment, which is the implied fair value of the reporting unit's goodwill compared to the carrying value. The implied fair value of goodwill is the difference between the fair value of the reporting unit and the fair value of its identifiable net assets. If the carrying value of goodwill exceeds the implied fair value of goodwill, the impaired goodwill is written down to its implied fair value and an impairment loss equal to this difference is recorded in the period that the impairment is identified as an operating expense.
	We determine the fair value of our reporting units based on the market approach and also in certain instances use the income approach to further validate our results. Under the market approach, we estimate the fair value based on market multiples of current year earnings before interest, taxes, depreciation and amortization (“EBITDA”) for each individual reporting unit. For the market approach, we use judgment in identifying the relevant comparable-company market multiples (i.e., recent divestitures/acquisitions, facts and circumstances surrounding the market, dominance, growth rate, etc.). For the income approach, we use projections based on management's most recent view of the long-term outlook for each reporting unit. Factors specific to each reporting unit include revenue growth, profit margins, terminal value growth rates, capital expenditures projections, assumed tax rates, discount rates and other assumptions deemed reasonable by management.
	For indefinite-lived intangibles, other than goodwill, an impairment loss is recognized if the carrying value exceeds the fair value. The estimated fair value is determined by utilizing the expected present value of the future cash flows of the assets.
	No impairment charges were recognized related to goodwill and indefinite-lived intangible assets for the fiscal years ended December 31, 2014, 2013 and 2012.
	Other intangibles, which primarily include customer lists and relationships, trademarks and technology related assets resulting from acquisitions, are being amortized over one to 16 years based on their estimated useful life using the straight-line method.
Impairment of Long-Lived Assets	Impairment of Long-Lived Assets. Long-lived assets, including property, plant and equipment, internal-use software and other intangible assets held for use, are tested for impairment when events or circumstances indicate the carrying amount of the asset group that includes these assets is not recoverable. An asset group is the lowest level for which its cash flows are independent of the cash flows of other asset groups. The carrying value of an asset group is not considered recoverable if the carrying value exceeds the sum of the undiscounted cash flows expected to result from the use and eventual disposition of the asset group. The impairment loss is measured by the difference between the carrying value of the asset group and its fair value. We generally estimate the fair value of an asset group using an income approach or quoted market price, whichever is applicable.
Foreign Currency Translation	Foreign Currency Translation. For all operations outside the U.S. where we have designated the local currency as the functional currency, assets and liabilities are translated using the end-of-year exchange rates, and revenues and expenses are translated using average exchange rates for the year. For those countries where we designate the local currency as the functional currency, translation adjustments are accumulated in a separate component of shareholders’ equity. Transaction gains and losses are recognized in earnings in the consolidated statement of operations and comprehensive income
Earnings Per Share of Common Stock	Earnings Per Share (“EPS”) of Common Stock. Basic EPS is calculated based on the weighted average number of shares of common stock outstanding during the reporting period. Diluted EPS is calculated giving effect to all potentially dilutive common shares, assuming such shares were outstanding during the reporting period. The difference between basic and diluted EPS is solely attributable to stock options and restricted stock programs. We use the treasury stock method to calculate the impact of outstanding stock options and restricted stock units.
	We are required to include in our computation of diluted EPS any contingently issuable shares that have satisfied all the necessary conditions by the end of the reporting period or would have satisfied all necessary conditions if the end of the reporting period was the end of the performance period. Contingently issuable shares are shares that issuance is contingent upon the satisfaction of certain conditions other than just service. Our performance-based restricted stock units are deemed to be contingently issuable shares.
	In addition, we are required to assess if any of our share-based payment transactions are deemed participating securities prior to vesting and therefore need to be included in the earnings allocation when computing EPS under the two-class method. The two-class method requires earnings to be allocated between common shareholders and holders of participating securities. All outstanding unvested share-based payment awards that contain non-forfeitable rights to dividends are considered to be a separate class of common stock and should be included in the calculation of basic and diluted EPS. Based on a review of our stock-based awards, we have determined that only our restricted stock awards are deemed participating securitie
Share-Based Compensation	Stock-Based Compensation. Our stock-based compensation programs are described more fully in Note 11 to the consolidated financial statements included in this Annual Report on Form 10-K.
	The compensation expense of our stock-based compensation programs is calculated by estimating the fair value of each stock-based award at the date of grant. The stock-based compensation expense is recognized over the shorter of the award’s vesting period or the period from the date of grant to the date when retirement eligibility is achieved. In addition, we estimate future forfeitures in calculating the stock-based compensation expense as opposed to only recognizing these forfeitures and the corresponding reductions in expense as they occur.
	For stock option awards, the fair value is estimated on the date of grant using the Black-Scholes option valuation model. The Black-Scholes option valuation model requires that we make assumptions about the stock price volatility, dividend yield, expected term of the stock option and risk-free interest rates. Our expected stock price volatility assumption is derived from the historical volatility of our common stock. The expected dividend yield assumption is determined by dividing the anticipated annual dividend payment by the stock price on the date of grant. We determine our expected term assumption using a midpoint scenario that combines our historical exercise data with hypothetical exercise data for our unexercised stock options. Our risk-free interest rate assumption corresponds to the expected term assumption of the stock option and is based on the U.S. Treasury yield curve in effect at the time of grant.
	For restricted stock unit awards which vest based solely on service, the fair value is estimated by using the average of the high and low prices of our common stock on the date of grant.
	For performance-based restricted stock units which have performance conditions, the fair market value is estimated by using the average of the high and low prices of our common stock on the date of grant. Compensation cost recognized over the performance period is based on the expected outcome of the performance condition. For performance-based restricted stock units which have market conditions, the fair market value is estimated on the date of grant using a Monte Carlo valuation model, which estimates possible outcomes of market conditions. Incorporated into the fair value of these awards is the possibility that the market conditions may not be satisfied. Compensation cost related to awards with market conditions are recognized regardless of whether the market condition is satisfied, provided that the requisite service has been satisfied. The Monte Carlo valuation model requires that we make assumptions about the stock price volatility, dividend yield, expected term of the award and risk-free interest rates. Our expected stock price volatility assumption is derived from the historical volatility of our common stock or for certain awards, a blend of historical volatility and, when available, implied volatility of our common stock. The expected dividend yield assumption is determined by dividing our most recent quarterly dividend payment by the average of the stock price from the three months preceding the grant date. The result is then annualized and compounded. Expected term is based on the period from date of grant through the end of the performance evaluation period. Our risk-free interest rate assumption corresponds to the expected term assumption of the stock option and is based on the U.S. Treasury yield curve in effect at the time of grant.
	If factors change, we may decide to use different assumptions under our valuation models and our forfeiture assumption in the future, which could materially affect our stock-based compensation expense, operating income, net income and earnings per share.
Financial Instruments	Financial Instruments. We use financial instruments, including foreign exchange forward contracts, option contracts and interest rate derivatives, to manage our exposure to movements in foreign exchange rates and interest rates. The use of these financial instruments modifies our exposure to these risks in order to minimize the potential negative impact and/or to reduce the volatility that these risks may have on our financial results.
	We recognize all such financial instruments as either assets or liabilities on the balance sheet and measure those instruments at fair value. We do not use derivative financial instruments for trading or speculative purposes.
	We use foreign exchange forward and option contracts to hedge certain non-functional currency-denominated intercompany and third-party transactions. These foreign exchange forward and option contracts are marked-to-market and the resulting remeasurement gains and losses are recorded as other income or expense. In addition, foreign exchange forward and option contracts are used to hedge certain of our foreign net investments. The gains and losses associated with these contracts are recorded in “Cumulative Translation Adjustment,” a component of shareholders’ equity.
	From time to time, we use interest rate swap agreements to hedge long-term fixed-rate debt. When executed, we designate such swaps as fair-value hedges and assess whether the swaps are highly effective in offsetting changes in the fair value of the hedged debt. We formally document all relationships between hedging instruments and hedged items, and we have documented policies for managing our exposures. Changes in the fair values of interest rate swap agreements that are designated fair-value hedges are recognized in earnings as an adjustment of interest expense. The hedge accounting effectiveness is monitored on an ongoing basis, and if considered ineffective, we discontinue hedge accounting prospectively. See Note 7 to the consolidated financial statements included in this Annual Report on Form 10-K.
Fair Value Measurements	Fair Value Measurements. We account for certain assets and liabilities at fair value. We define fair value as the exchange price that would be received for an asset or paid to transfer a liability (in either case an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants at the measurement date. Additionally, the inputs used to measure fair value are prioritized based on a three-level hierarchy. This hierarchy requires entities to maximize the use of observable inputs and minimize the use of unobservable inputs. The three levels of inputs used to measure fair value are as follows:
	Level Input		Input Definition
	Level I		Observable inputs utilizing quoted prices (unadjusted) for identical assets or liabilities in active markets at the measurement date.
	Level II		Inputs other than quoted prices included in Level I that are either directly or indirectly observable for the asset or liability through corroboration with market data at the measurement date.
	Level III		Unobservable inputs for the asset or liability in which little or no market data exists, therefore requiring management’s best estimate of what market participants would use in pricing the asset or liability at the measurement date.
	In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, the level in the fair value hierarchy within which the fair value measurement in its entirety falls has been determined based on the lowest level input that is significant to the fair value measurement in its entirety. Our assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment and considers factors specific to the asset or liability.
	The estimated fair values of financial assets and liabilities and certain non-financial assets and liabilities, which are presented herein, have been determined by our management using available market information and appropriate valuation methodologies. However, judgment is required in interpreting market data to develop estimates of fair value. Accordingly, the estimates presented herein may not necessarily be indicative of amounts we could realize in a current market sale. See Note 7 to the consolidated financial statements included in this Annual Report on Form 10-K.

Description_of_Business_and_Su2

Description of Business and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Carrying Value of the Components of the asset group to be sold [Table Text Block]	Below is a summary of the components of the asset group and its carrying value as of September 30, 2014:
			Carrying Value
	Building and Building Improvements		$	9.9
	Land		4.7
	Furniture and Fixtures		0.3
	Machinery and Equipment		0.4
	Total		$	15.3
	Below is a summary of the components of the asset group and its carrying value as of September 30, 2014:
			Carrying Value
	Building and Building Improvements		$	9.9
	Land		4.7
	Furniture and Fixtures		0.3
	Machinery and Equipment		0.4
	Total		$	15.3
Future Amortization of Acquired Intangible Assets	Expected future amortization of acquired intangible assets as of December 31, 2014 is as follows:
	Total				2015		2016		2017		2018		2019		Thereafter
	$	61.6			$	12.2	$	11.3	$	7.5	$	6.2	$	5.3	$	19.1

Restructuring_Charge_Tables

Restructuring Charge (Tables)	12 Months Ended
	Dec. 31, 2014
Restructuring and Related Activities [Abstract]
Restructuring Reserves and Utilization Related to Financial Flexibility Initiatives	The following tables set forth, in accordance with ASC 712-10 and/or ASC 420-10, the restructuring reserves and utilization:
		Severance			Contract Termination, Lease			Total
		and			Termination
		Termination			Obligations
					and Other
					Exit Costs
	Restructuring Charges:
	Balance Remaining as of January 1, 2012	$	8.3		$	2.2		$	10.5
	Charge Taken during the Year Ended December 31, 2012	22.7			6.7			29.4
	Payments during the Year Ended December 31, 2012	(21.6		)	(6.6		)	(28.2		)
	Balance Remaining as of December 31, 2012	$	9.4		$	2.3		$	11.7
	Charge Taken during the Year Ended December 31, 2013	8.2			5.7			13.9
	Payments/Asset Impairment(1) during the Year Ended December 31, 2013	(11.8		)	(3.4		)	(15.2		)
	Balance Remaining as of December 31, 2013	$	5.8		$	4.6		$	10.4
	Charge Taken during the Year Ended December 31, 2014	13			1.9			14.9
	Payments during the Year Ended December 31, 2014	(10.7		)	(4.7		)	(15.4		)
	Balance Remaining as of December 31, 2014	$	8.1		$	1.8		$	9.9
	-1	We incurred an asset impairment of $0.5 million in the first quarter of 2013 related to the termination of a lease.

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive income Accumulated Other Comprehensive Income (Tables)	12 Months Ended
	Dec. 31, 2014
Accumulated other Comprehensive income [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]	The following table summarizes the changes in the accumulated balances for each component of accumulated other comprehensive income (“AOCI”) as of December 31, 2014 and 2013:
		Foreign Currency Translation Adjustments				Defined Benefit Pension Plans				Derivative Financial Instruments				Total
	31-Dec-12	$	(151.2	)		$	(701.0	)		$	0.1			$	(852.1	)
	Other Comprehensive Income Before Reclassifications	(35.5		)		127.9				—				92.4
	Amounts Reclassified From Accumulated Other Comprehensive Income, net of tax	—				20.9				—				20.9
	31-Dec-13	$	(186.7	)		$	(552.2	)		$	0.1			$	(738.8	)
	Other Comprehensive Income Before Reclassifications	(46.7		)		(156.9		)		(0.1		)		(203.7		)
	Amounts Reclassified From Accumulated Other Comprehensive Income, net of tax	—				20.4				—				20.4
	31-Dec-14	$	(233.4	)		$	(688.7	)		$	—			$	(922.1	)
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]	The following table summarizes the reclassifications out of AOCI as of December 31, 2014, 2013 and 2012:
	Details About Accumulated Other Comprehensive Income Components	Affected Line Item in the Statement Where Net Income is Presented		Amount Reclassified from Accumulated Other Comprehensive Income
				For the Years Ended December 31,
				2014				2013				2012
	Foreign Currency Translation Adjustments:
	Sale of Business	Other Income (Expense) – Net		$	—			$	—			$	(1.3	)
	Defined Benefit Pension Plans:
	Amortization of Prior Service Costs	Selling and Administrative Expenses		$	(1.5	)		$	(6.4	)		$	(7.1	)
		Operating Expenses		(0.6		)		(2.5		)		(2.5		)
	Amortization of Actuarial Gain/Loss	Selling and Administrative Expenses		24.9				30.5				24.6
		Operating Expenses		10.1				11.8				8.5
	Total Before Tax			32.9				33.4				23.5
	Tax (Expense) or Benefit			(12.5		)		(12.5		)		(7.7		)
	Total After Tax			$	20.4			$	20.9			$	15.8
	Derivative Financial Instruments:
	Amortization of Cash Flow Hedges	Interest Expense		$	—			$	—			$	1.7
	Loss on Derivative	Other Income (Expense) - Net		—				—				0.3
	Total Before Tax			—				—				2
	Tax (Expense) or Benefit			—				—				(1.9		)
	Total After Tax			$	—			$	—			$	0.1
	Total Reclassifications for the Period, Net of Tax			$	20.4			$	20.9			$	14.6

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Income before Provision for Income Taxes	Income before provision for income taxes consisted of:
			For the Years Ended December 31,
			2014				2013				2012
	U.S.		$	221.1			$	319.5			$	295.1
	Non-U.S.		127.5				76.5				83.2
	Income Before Provision for Income Taxes, and Equity in Net Income of Affiliates		$	348.6			$	396			$	378.3
Provision for Income Taxes	The provision for income taxes consisted of:
			For the Years Ended December 31,
			2014				2013				2012
	Current Tax Provision:
	U.S. Federal		$	2.8			$	81.6			$	45.9
	State and Local		11.7				8.3				6.8
	Non-U.S.		23.6				21.2				10.3
	Total Current Tax Provision		$	38.1			$	111.1			$	63
	Deferred Tax Position:
	U.S. Federal		$	6.6			$	30.8			$	15.4
	State and Local		4.3				(2.6		)		3.1
	Non-U.S.		3.6				(3.8		)		1.6
	Total Deferred Tax Provision		$	14.5			$	24.4			$	20.1
	Provision for Income Taxes		$	52.6			$	135.5			$	83.1
Significant Differences between U.S. Federal Statutory Tax Rate and Effective Tax Rate for Financial Statement Purposes	The following table summarizes the significant differences between the U.S. Federal statutory tax rate and our effective tax rate for financial statement purposes:
			For the Years Ended December 31,
			2014			2013			2012
	Statutory Tax Rate		35	%		35	%		35	%
	State and Local Taxes, net of U.S. Federal Tax Benefits		3			0.9			1.5
	Nondeductible Charges		4.6			0.4			2.8
	U.S. Taxes on Foreign Income		1.4			1.3			1
	Non-U.S. Taxes		(1.6	)		(1.7	)		(3.3	)
	Valuation Allowance		(0.1	)		0.4			(0.7	)
	Interest		(1.9	)		0.5			(0.8	)
	Tax Credits and Deductions		(5.9	)		(3.2	)		(3.3	)
	Tax Contingencies Related to Uncertain Tax Positions		(4.8	)		0.4			0.5
	Impact of Legacy Tax Matters (1)		(14.9	)		—			(6.9	)
	Loss on Investment		—			—			(4.1	)
	Other		0.3			0.2			0.3
	Effective Tax Rate		15.1	%		34.2	%		22	%
	(1) The impact for 2014 was due to the release of reserves for uncertain tax positions due to the effective settlement of audits for the 2007 - 2009 tax years and the expiration of the statute of limitations for the 2010 tax year.
Deferred Tax Assets (Liabilities)	Deferred tax assets (liabilities) are comprised of the following:
			December 31,
			2014				2013
	Deferred Tax Assets:
	Operating Losses		$	33.6			$	41.9
	Restructuring Costs		2.6				2.6
	Bad Debts		4.5				5.2
	Accrued Expenses		16.2				12.6
	Capital Loss and Credit Carryforwards		17.7				11.5
	Other		0.7				2
	Pension and Postretirement Benefits		223.1				145.9
	Total Deferred Tax Assets		298.4				221.7
	Valuation Allowance		(36.9		)		(38.3		)
	Net Deferred Tax Assets		$	261.5			$	183.4
	Deferred Tax Liabilities:
	Intangibles		$	(30.1	)		$	(35.7	)
	Fixed Assets		(3.9		)		(4.2		)
	Other		(2.7		)		(0.7		)
	Total Deferred Tax Liabilities		$	(36.7	)		$	(40.6	)
	Net Deferred Tax Assets		$	224.8			$	142.8
Reconciliation of Gross Unrecognized Tax Benefits	The following is a reconciliation of the gross unrecognized tax benefits:
	Gross Unrecognized Tax Benefits as of January 1, 2012		$	120.1
	Additions for Prior Years' Tax Positions		5.1
	Additions for Current Years' Tax Positions		5.1
	Addition due to CTA		0.3
	Reduction in Prior Years' Tax Positions (1)		(28.7		)
	Reduction Due to Expired Statute of Limitations		(1.2		)
	Gross Unrecognized Tax Benefits as of December 31, 2012		100.7
	Additions for Prior Years' Tax Positions		7.7
	Additions for Current Years' Tax Positions		0.5
	Settlements with Taxing Authority		(1.0		)
	Reduction due to CTA		(0.5		)
	Reduction in Prior Years' Tax Positions		(0.4		)
	Reduction Due to Expired Statute of Limitations		(1.2		)
	Gross Unrecognized Tax Benefits as of December 31, 2013		105.8
	Additions for Prior Years' Tax Positions		2.1
	Additions for Current Years' Tax Positions		1
	Settlements with Taxing Authority		(4.0		)
	Reduction due to CTA		(0.2		)
	Reduction in Prior Years' Tax Positions (2)		(57.1		)
	Reduction Due to Expired Statute of Limitations (3)		(18.4		)
	Gross Unrecognized Tax Benefits as of December 31, 2014		$	29.2
	-1	The decrease is primarily due to the release of reserves for uncertain tax positions due to the expiration of the statute of limitations for the 2005 - 2006 tax years.
	-2	The decrease is primarily due to the release of reserves for uncertain tax positions due to the effective settlement of audits for the 2007 - 2009 tax years.
	-3	The decrease is primarily due to the release of reserves due to the expiration of the statute of limitations for the 2010 tax year.

Notes_Payable_and_Indebtedness1

Notes Payable and Indebtedness (Tables)	12 Months Ended
	Dec. 31, 2014
Debt Disclosure [Abstract]
Borrowings	Our borrowings are summarized in the following table:
		December 31,
		2014		2013
	Debt Maturing Within One Year:
	Fixed-Rate Note (net of a $0.2 million discount as of December 31, 2014)	$	299.8	$	—
	Fair Value Adjustment Related to Hedged Debt	1.2		—
	Other	0.1		0.1
	Total Debt Maturing Within One Year	$	301.1	$	0.1
	Debt Maturing After One Year:
	Long-Term Fixed-Rate Notes (Net of a $2.3 million and $3.0 million discount as of December 31, 2014 and 2013, respectively)	$	747.7	$	1,047.00
	Fair Value Adjustment Related to Hedged Debt	—		2.5
	Credit Facility	604.5		466.5
	Total Debt Maturing After One Year	$	1,352.20	$	1,516.00

Financial_Instruments_Tables

Financial Instruments (Tables) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014																											Sep. 30, 2014
Carrying Value of the Components of the asset group to be sold [Line Items]
Carrying Value of the Components of the asset group to be sold [Table Text Block]	Below is a summary of the components of the asset group and its carrying value as of September 30, 2014:
			Carrying Value
	Building and Building Improvements		$	9.9
	Land		4.7
	Furniture and Fixtures		0.3
	Machinery and Equipment		0.4
	Total		$	15.3
	Below is a summary of the components of the asset group and its carrying value as of September 30, 2014:
			Carrying Value
	Building and Building Improvements		$	9.9
	Land		4.7
	Furniture and Fixtures		0.3
	Machinery and Equipment		0.4
	Total		$	15.3
Carrying Value of the Components of the Asset Group to be Sold																												$15.30
Fair Values of Derivative Instruments in Consolidated Balance Sheet	Fair Values of Derivative Instruments in the Consolidated Balance Sheets
		Asset Derivatives												Liability Derivatives
		31-Dec-14						31-Dec-13						31-Dec-14					31-Dec-13
		Balance Sheet		Fair Value				Balance Sheet		Fair Value				Balance Sheet		Fair Value			Balance Sheet		Fair Value
		Location						Location						Location					Location
	Derivatives not designated as hedging instruments
	Foreign exchange forward contracts	Other Current		$	0.4			Other Current		$	0.4			Other Accrued &		$	0.1		Other Accrued &		$	0.4
		Assets						Assets						Current Liabilities					Current Liabilities
	Total derivatives not designated as hedging instruments			$	0.4					$	0.4					$	0.1				$	0.4
	Total Derivatives			$	0.4					$	0.4					$	0.1				$	0.4
Effect of Derivative Instruments on Consolidated Statement of Operations	The Effect of Derivative Instruments on the Consolidated Statements of Operations and Comprehensive Income
			Gain (Loss) Recognized in Income on Derivatives
		Derivatives in Fair	Location		For the Year Ended December 31,												Hedged Item	Location		For the Year Ended December 31,
		Value Hedging
		Relationships
					2014				2013				2012							2014			2013		2012
		Interest rate contracts	Non-Operating		$	—			$	—			$	0.8			Fixed-	Non-Operating		$	—		$	—	$	(0.5	)
			Income (Expenses)														rate	Income (Expenses)
			– Net														debt	– Net
	Our foreign exchange forward contracts are not designated as hedging instruments under authoritative guidance.
	The Effect of Derivative Instruments on the Consolidated Statements of Operations and Comprehensive Income
	Derivatives not Designated as Hedging	Location of Gain (Loss) Recognized in		Amount of Gain (Loss) Recognized in Income on Derivatives
	Instruments	Income on Derivatives
				For the Year Ended December 31,
				2014				2013				2012
	Foreign exchange forward contracts	Non-Operating Income (Expenses) – Net		$	(7.6	)		$	(6.8	)		$	5.7
	Foreign exchange option contracts	Non-Operating Income (Expenses) – Net		$	—			$	—			$	(0.2	)
Assets and Liabilities Measured at Fair Value on Recurring Basis	The following table summarizes fair value measurements by level at December 31, 2014 for assets and liabilities measured at fair value on a recurring basis:
		Quoted Prices in				Significant Other				Significant				Balance at December 31, 2014
		Active Markets				Observable				Unobservable
		for Identical				Inputs (Level II)				Inputs
		Assets (Level I)								(Level III)
	Assets:
	Cash Equivalents (1)	$	126.1			$	—			$	—			$	126.1
	Other Current Assets:
	Foreign Exchange Forwards (2)	$	—			$	0.4			$	—			$	0.4
	Liabilities:
	Other Accrued and Current Liabilities:
	Foreign Exchange Forwards (2)	$	—			$	0.1			$	—			$	0.1
	-1	Cash equivalents represent fair value as it consists of highly liquid investments with an original maturity of three months or less.
	-2	Primarily represents foreign currency forward contracts. Fair value is determined utilizing a market approach and considers a factor for nonperformance in the valuation.
	The following table summarizes fair value measurements by level at December 31, 2013 for assets and liabilities measured at fair value on a recurring basis:
		Quoted Prices in				Significant Other				Significant				Balance at December 31, 2013
		Active Markets				Observable				Unobservable
		for Identical				Inputs (Level II)				Inputs
		Assets (Level I)								(Level III)
	Assets:
	Cash Equivalents (1)	$	95.9			$	—			$	—			$	95.9
	Other Current Assets:
	Foreign Exchange Forwards (2)	$	—			$	0.4			$	—			$	0.4
	Liabilities:
	Other Accrued and Current Liabilities:
	Foreign Exchange Forwards (2)	$	—			$	0.4			$	—			$	0.4
	-1	Cash equivalents represent fair value as it consists of highly liquid investments with an original maturity of three months or less.
	-2	Primarily represents foreign currency forward contracts. Fair value is determined utilizing a market approach and considers a factor for nonperformance in the valuation.
Carrying Amount and Estimated Fair Value of Asset (Liability)	The estimated fair values of other financial instruments subject to fair value disclosures, determined based on valuation models using discounted cash flow methodologies with market data inputs from globally recognized data providers and third-party quotes from major financial institutions (categorized as Level II in the fair value hierarchy), are as follows:
		Balance at December 31,
		2014								2013
		Carrying				Fair Value				Carrying				Fair Value
		Amount (Asset)				(Asset) Liability				Amount (Asset)				(Asset) Liability
		Liability								Liability
	Short-term and Long-term Debt	$	1,047.50			$	1,082.10			$	1,047.00			$	1,054.80
	Credit Facilities	$	604.5			$	625.4			$	466.5			$	466.1
Building and Building Improvements [Member]
Carrying Value of the Components of the asset group to be sold [Line Items]
Carrying Value of the Components of the Asset Group to be Sold																												9.9
Land [Member]
Carrying Value of the Components of the asset group to be sold [Line Items]
Carrying Value of the Components of the Asset Group to be Sold																												4.7
Furniture and Fixtures [Member]
Carrying Value of the Components of the asset group to be sold [Line Items]
Carrying Value of the Components of the Asset Group to be Sold																												0.3
Machinery and Equipment [Member]
Carrying Value of the Components of the asset group to be sold [Line Items]
Carrying Value of the Components of the Asset Group to be Sold																												$0.40

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2014
Earnings Per Share [Abstract]
Earnings Per Share
		For the Years Ended December 31,
		2014			2013		2012
	Net Income Attributable to Dun & Bradstreet	$	294.4		$	258.5	$	295.5
	Less: Allocation to Participating Securities	—			—		(0.1		)
	Net Income Attributable to Dun & Bradstreet Common Shareholders – Basic and Diluted	$	294.4		$	258.5	$	295.4
	Weighted Average Number of Shares Outstanding – Basic	36.5			39.1		45.6
	Dilutive Effect of Our Stock Incentive Plans	0.4			0.4		0.4
	Weighted Average Number of Shares Outstanding – Diluted	36.9			39.5		46
	Basic Earnings Per Share of Common Stock Attributable to Dun & Bradstreet Common Shareholders	$	8.06		$	6.61	$	6.47
	Diluted Earnings Per Share of Common Stock Attributable to Dun & Bradstreet Common Shareholders	$	7.99		$	6.54	$	6.43
Share Repurchases	Our share repurchases were as follows:
			For the Years Ended December 31,
	Program		2014				2013					2012
			Shares		$ Amount		Shares			$ Amount		Shares		$ Amount
	Share Repurchase Programs		1,570,326	(a)	$	165	3,545,513		(a)	$	325	6,483,144	(a)	$	480.1
	Repurchases to Mitigate the Dilutive Effect of the Shares Issued Under Our Stock Incentive Plans and Employee Stock Purchase Plan (“ESPP”)		541,326	(b)	60		962,686		(b)	95		354,046	(b)	27.9
	Total Repurchases		2,111,652		$	225	4,508,199			$	420	6,837,190		$	508
	(a)	In August 2012, our Board of Directors approved a $500 million increase to our then-existing $500 million share repurchase program, for a total program authorization of $1 billion. The then-existing $500 million share purchase program was approved by our Board of Directors in October 2011 and commenced in November 2011 upon completion of the previous $200 million share repurchase program. This program was completed in August 2014.
	(b)	In May 2010, our Board of Directors approved a four-year, five million share repurchase program to mitigate the dilutive effect of the shares issued under our stock incentive plans and ESPP. This program commenced in October 2010 and expired in October 2014. Of the 5,000,000 shares that were authorized for repurchase under this program, 2,682,492 shares were repurchased at the time this program expired in October 2014.
	In August 2014, our Board of Directors approved a new $100 million share repurchase program to mitigate the dilutive effect of shares issued under our stock incentive plans and Employee Stock Purchase Program, and to be used for discretionary share repurchases from time to time.  Use of the new $100 million share repurchase program for anti-dilutive share repurchases was authorized to commence upon the completion or expiration of our four-year, five million share anti-dilutive share repurchase program which expired in October 2014. Any use for discretionary share repurchases was authorized to commence upon the completion of our $1 billion discretionary share repurchase program which was completed in August 2014. The new $100 million share repurchase program will remain open until it has been fully utilized. There is currently no definitive timeline under which the program will be completed. As of December 31, 2014, we had not yet commenced share repurchases under this program.

Pension_and_Postretirement_Ben1

Pension and Postretirement Benefits (Tables)	12 Months Ended
	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Changes in Benefit Obligations and Plan Assets for Pension and Postretirement Plans	The following table sets forth the changes in our benefit obligations and plan assets for our pension and postretirement plans. The table also presents the line items in the consolidated balance sheets where the related assets and liabilities are recorded:
			Pension Plans								Postretirement Benefits
			2014				2013				2014				2013
	Change in Benefit Obligation:
	Benefit Obligation at January 1		$	(1,827.6	)		$	(1,972.1	)		$	(27.4	)		$	(27.0	)
	Service Cost		(3.5		)		(4.8		)		(0.8		)		(0.8		)
	Interest Cost		(78.9		)		(70.2		)		(0.7		)		(0.7		)
	Benefits Paid		100.2				97.9				16.9				15.1
	Direct Subsidies Received		—				—				(4.3		)		(2.0		)
	Impact of Curtailment/Settlement		0.2				—				—				—
	Plan Participant Contributions		(0.3		)		(0.4		)		(8.7		)		(10.1		)
	Actuarial (Loss) Gain		(10.6		)		(3.3		)		—				(0.1		)
	Plan Amendment		0.1				—				4.9				—
	Assumption Change		(285.5		)		127.4				(1.2		)		(1.8		)
	Effect of Changes in Foreign Currency Exchange Rates		12.5				(2.1		)		—				—
	Benefit Obligation at December 31		$	(2,093.4	)		$	(1,827.6	)		$	(21.3	)		$	(27.4	)
	Change in Plan Assets:
	Fair Value of Plan Assets at January 1		$	1,451.70			$	1,318.80			$	—			$	—
	Actual Return on Plan Assets		139.2				178.1				—				—
	Employer Contributions		37.2				51.2				3.9				3
	Direct Subsidies Received		—				—				4.3				2
	Plan Participant Contributions		0.3				0.4				8.7				10.1
	Settlement		(0.2		)		—				—				—
	Benefits Paid		(100.2		)		(97.9		)		(16.9		)		(15.1		)
	Effect of Changes in Foreign Currency Exchange Rates		(11.1		)		1.1				—				—
	Fair Value of Plan Assets at December 31		$	1,516.90			$	1,451.70			$	—			$	—
	Funded Status of Plan		$	(576.5	)		$	(375.9	)		$	(21.3	)		$	(27.4	)
			Pension Plans								Postretirement Benefits
			At December 31,
			2014				2013				2014				2013
	Amounts Recorded in the Consolidated Balance Sheets:
	Prepaid Pension Costs		$	1.8			$	3.4			$	—			$	—
	Pension and Postretirement Benefits		(561.0		)		(362.9		)		(18.6		)		(23.1		)
	Accrued Payroll		(17.3		)		(16.4		)		(2.7		)		(4.3		)
	Net Amount Recognized		$	(576.5	)		$	(375.9	)		$	(21.3	)		$	(27.4	)
	Accumulated Benefit Obligation		$	2,080.40			$	1,814.50			N/A				N/A
	Amount Recognized in Accumulated Other Comprehensive Income Consists of:
	Actuarial Loss (Gain)		$	1,141.30			$	920.3			$	(9.4	)		$	(11.6	)
	Prior Service Cost (Credit)		5.1				5.5				(4.1		)		(1.6		)
	Total Amount Recognized - Pretax		$	1,146.40			$	925.8			$	(13.5	)		$	(13.2	)
Underfunded or Unfunded Accumulated Benefit Obligation and Related Projected Benefit Obligation	At December 31, 2014 and 2013, our underfunded or unfunded accumulated benefit obligation and the related projected benefit obligation are as follows:
			2014				2013
	Accumulated Benefit Obligation		$	2,056.10			$	1,793.20
	Fair Value of Plan Assets		1,488.80				1,425.00
	Unfunded Accumulated Benefit Obligation		$	567.3			$	368.2
	Projected Benefit Obligation		$	2,067.20			$	1,804.40
Components of Net Periodic (Income) Cost Associated with Pension Plans and Postretirement Benefit Obligations	The following table sets forth the components of net periodic cost associated with our pension plans and our postretirement benefit obligations:
		Pension Plans												Postretirement Benefit Obligations
		For the Years Ended December 31,
		2014				2013				2012				2014				2013			2012
	Components of Net Periodic Cost (Income):
	Service Cost	$	3.5			$	4.8			$	5.9			$	0.8			$	0.8		$	0.8
	Interest Cost	78.9				70.2				75.2				0.7				0.7			0.6
	Expected Return on Plan Assets	(100.2		)		(94.1		)		(99.3		)		—				—			—
	Amortization of Prior Service Cost (Credit)	0.3				0.3				0.3				(2.4		)		(9.2		)	(9.9		)
	Recognized Actuarial Loss (Gain)	36.1				43.7				35.6				(1.1		)		(1.4		)	(2.5		)
	Curtailment Charge	0.1				—				—				—				—			—
	Net Periodic Cost (Income)	$	18.7			$	24.9			$	17.7			$	(2.0	)		$	(9.1	)	$	(11.0	)
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income	The following table sets forth other changes in plan assets and benefit obligations recognized in Other Comprehensive Income:
			Pension Plans								Postretirement Benefits
			At December 31,
			2014				2013				2014				2013
	Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
	Amortization of Actuarial (Loss) Gain, Before Tax (Income) Expense of $13.3 in 2014 and $15.8 in 2013		$	(36.1	)		$	(43.7	)		$	1.1			$	1.4
	Amortization of Prior Service (Cost) Credit, Before Tax (Income) Expense of $(0.8) in 2014 and $(3.3) in 2013		$	(0.3	)		$	(0.3	)		$	2.4			$	9.2
	Actuarial (Loss) Gain Arising During the Year, Before Tax (Income) Expense of $(98.2) in 2014 and $75.9 in 2013		$	(257.1	)		$	207.6			$	(1.1	)		$	(4.0	)
	Prior Service Credit (Cost) Arising During the Year, Before Tax Expense (Income) of $1.9 in 2014 and $0.0 in 2013		$	0.1			$	0.1			$	4.9			$	—
Estimated Amortization from Accumulated Other Comprehensive Income	The following table sets forth estimated 2015 amortization from AOCI:
							Postretirement Benefits
			Pension Plans
	Estimated 2015 amortization from Accumulated Other Comprehensive Income
	Actuarial Loss (Gain)		$	43.1			$	(0.9	)
	Prior Service Cost (Credit)		0.2				(1.6		)
	Total		$	43.3			$	(2.5	)
Assumptions used to Determine Pension Plan and Postreitrement Benefit Plan Obligations	The following table sets forth the assumptions we used to determine our pension plan and postretirement benefit plan obligations for December 31, 2014 and 2013:
			Pension Plans						Postretirement Benefits
			2014			2013			2014			2013
	Weighted Average Discount Rate		3.62	%		4.43	%		2.95	%		3.18	%
	Weighted Average Rate of Compensation Increase		5.99	%		5.95	%		N/A			N/A
	Cash Balance Account Interest Crediting Rate (1)		4.45%/3.04%			4.45%/3.8%			N/A			N/A
	Cash Balance Account Conversion Rate (1)		1.40%/3.88%/4.96%			1.19%/4.53%/5.66%			N/A			N/A
	(1) Only applicable to the U.S. Plans.
Assumptions used to Determine Net Periodic Benefit Cost	The following table sets forth the assumptions we used to determine net periodic benefit cost for the years ended December 31, 2014, 2013 and 2012:
			Pension Plans									Postretirement Benefits
			2014			2013			2012			2014			2013			2012
	Weighted Average Discount Rate		4.41	%		3.71	%		4.3	%		3.18	%		2.59	%		3.17	%
	Weighted Average Expected Long-Term Return on Plan Assets		7.34	%		7.15	%		7.24	%		N/A			N/A			N/A
	Weighted Average Rate of Compensation Increase		5.78	%		5.59	%		5.8	%		N/A			N/A			N/A
	Cash Balance Account Interest Crediting Rate (1)		4.45%/3.8%			4.45%/3.0%			4.45	%		N/A			N/A			N/A
	Cash Balance Account Conversion Rate (1)		1.25%/4.57%/5.60%			0.97%/3.50%/4.60%			1.99%/4.47%/5.26%			N/A			N/A			N/A
	(1) Only applicable to the U.S. Plans.
Fair Value Hierarchy of Plan Assets at Fair Value	The following table sets forth by level, within the fair value hierarchy, the plan assets at fair value as of December 31, 2014:
	Asset Category		Quoted Prices in Active Markets for Identical Assets (Level I)				Significant Other Observable Inputs (Level II)				Significant Unobservable Inputs				Total
											(Level III)
	Common and Preferred Stocks:
	Consumer		$	40			$	—			$	—			$	40
	Energy		15.8				—				—				15.8
	Financial		68.9				—				—				68.9
	Health Care		30.6				—				—				30.6
	Industrial		35.7				—				—				35.7
	Information Technology		58.5				—				—				58.5
	Other		9.3				—				—				9.3
	Preferred Stocks		3.8				—				—				3.8
	Total Common and Preferred Stocks		$	262.6			$	—			$	—			$	262.6
	Commingled Funds:
	Commingled Equity Funds		$	—			$	476.9			$	—			$	476.9
	Commingled Fixed Income Funds		—				490.9				—				490.9
	Total Commingled Funds		$	—			$	967.8			$	—			$	967.8
	Bonds:
	Corporate Bonds		$	—			$	72.8			$	—			$	72.8
	Other Bonds		—				14.2				—				14.2
	Total Bonds		$	—			$	87			$	—			$	87
	Government Bonds and Mortgage Backed Securities:
	U.S. Government Bonds and Notes		$	58.8			$	—			$	—			$	58.8
	Foreign Government Bonds		—				4.7				—				4.7
	U.S. Agency Mortgage Backed Securities		—				46.8				—				46.8
	Total Government Bonds and Mortgage Backed Securities		$	58.8			$	51.5			$	—			$	110.3
	State and Local Obligations		—				6.3				—				6.3
	Real Estate Investment Trusts		3.6				—				—				3.6
	Real Estate Funds		—				—				42.7				42.7
	Short-Term Investment Funds		—				36.6				—				36.6
	Total Investments at Fair Value		$	325			$	1,149.20			$	42.7			$	1,516.90
	The following table sets forth by level, within the fair value hierarchy, the plan assets at fair value as of December 31, 2013:
	Asset Category		Quoted Prices in Active Markets for Identical Assets (Level I)				Significant Other Observable Inputs (Level II)				Significant Unobservable Inputs				Total
											(Level III)
	Common and Preferred Stocks:
	Consumer		$	35.5			$	—			$	—			$	35.5
	Energy		15.8				—				—				15.8
	Financial		44.2				—				—				44.2
	Health Care		22.1				—				—				22.1
	Industrial		32.6				—				—				32.6
	Information Technology		36.9				—				—				36.9
	Other		11.8				—				—				11.8
	Preferred Stocks		1.2				—				—				1.2
	Total Common and Preferred Stocks		$	200.1			$	—			$	—			$	200.1
	Commingled Funds:
	Commingled Equity Funds		$	—			$	580			$	—			$	580
	Commingled Fixed Income Funds		—				402.6				—				402.6
	Total Commingled Funds		$	—			$	982.6			$	—			$	982.6
	Bonds:
	Corporate Bonds		$	—			$	67.2			$	—			$	67.2
	Other Bonds		—				12.6				—				12.6
	Total Bonds		$	—			$	79.8			$	—			$	79.8
	Government Bonds and Mortgage Backed Securities:
	U.S. Government Bonds and Notes		$	38.6			$	—			$	—			$	38.6
	Foreign Government Bonds		—				2				—				2
	U.S. Agency Mortgage Backed Securities		—				48.6				—				48.6
	Total Government Bonds and Mortgage Backed Securities		$	38.6			$	50.6			$	—			$	89.2
	State and Local Obligations		—				7.3				—				7.3
	Real Estate Investment Trusts		2.4				—				—				2.4
	Real Estate Funds		—				—				38.9				38.9
	Short-Term Investment Funds		—				51.4				—				51.4
	Total Investments at Fair Value		$	241.1			$	1,171.70			$	38.9			$	1,451.70
Summary of Changes in Fair Value of all Plans' Level III Assets	The table below sets forth the summary of changes in the fair value of all of our plans’ Level III assets for the years ended December 31:
			2014				2013
	Beginning Balance at January 1		$	38.9			$	34.8
	Actual return (loss) on plan assets:
	Related to assets still held at the reporting date		3.8				4.1
	Related to assets sold during the period		—				—
	Purchases, sales and settlements		—				—
	Transfers in and/or out of Level III		—				—
	Balance at December 31		$	42.7			$	38.9
Weighted Average Asset Allocations and Target Asset Allocation by Asset Category	The following table sets forth the weighted average asset allocations and target asset allocations by asset category, as of the measurement dates of the plans:
			Asset Allocations						Target Asset Allocations
			As of December 31,
			2014			2013			2014			2013
	Equity Securities		50	%		55	%		50	%		52	%
	Debt Securities		47			42			47			45
	Real Estate		3			3			3			3
	Total		100	%		100	%		100	%		100	%
Expected Benefit Payments from Pension Plans and Postretirement Plans through 2021	The following table summarizes expected benefit payments from our pension plans and postretirement plans through 2024. Actual benefit payments may differ from expected benefit payments. These amounts are net of expected plan participant contributions:
			Pension Plans				Postretirement Benefits Plan
	2015		$	111.5			$	2.7
	2016		$	114.8			$	2.5
	2017		$	121.9			$	2.2
	2018		$	120.3			$	2.1
	2019		$	133.6			$	1.9
	2020 - 2024		$	597.6			$	8.2
Healthcare Trend Assumptions used in Determining Year End Benefit Obligation	The following table presents healthcare trend assumptions used to determine the year end benefit obligation:
			2014			2013
	Medical (1)		6	%		6	%
	Prescription Drug (1)		8	%		8	%
	-1	The rates are assumed to decrease to 5.0% in 2020 and remain at that level thereafter.
Effects of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates	A one-percentage-point change in the assumed health care cost trend rates would have the following effects:
			1% Point
			Increase				Decrease
	Benefit Obligations at End of Year		$	(0.4	)		$	0.6
	Service Cost Plus Interest Cost		$	—			$	—

Employee_Stock_Plans_Employee_

Employee Stock Plans Employee Stock Plans (Tables)	12 Months Ended
	Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Share Based Payment Award, Leveraged Restricted Stock Units, Valuation Assumptions [Table Text Block]	As these awards contain a market condition, we have calculated the fair value on the date of grant using a Monte Carlo simulation model with the following weighted average assumptions:
		2014		2013		2012
	Expected stock price volatility	26%		25%		N/A
	Expected dividend yield	1.60%		1.90%		N/A
	Expected term (in years)	3		3		N/A
	Risk-free interest rate	0.64%		0.38%		N/A
	Fair value of LRSUs granted	$92.37		$85.48		N/A
Changes in Stock Options	Changes in stock options for the year ended December 31, 2014 are summarized as follows:
	Stock Options	Shares			Weighted Average Exercise Price Per Share				Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value
	Outstanding at December 31, 2013	855,747			$	79.23			5.7		$	37.2
	Granted	1,340			$	110.76
	Exercised	(112,093	)		$	71.55
	Forfeited or expired	(18,650	)		$	82.28
	Outstanding at December 31, 2014	726,344			$	80.39			5		$	29.5
	Exercisable and unvested expected to vest at December 31, 2014	724,258			$	80.38			5		$	29.4
	Exercisable at December 31, 2014	566,929			$	79.93			4.4		$	23.3
Fair Value of each Stock Option Award Estimated on Date of Grant Using Black-Scholes Option Valuation Model	The fair value of each stock option award was estimated on the date of grant using the Black-Scholes option valuation model that used the weighted average assumptions in the following table:
		2014		2013		2012
	Expected stock price volatility	24%		23%		23%
	Expected dividend yield	1.60%		1.60%		1.80%
	Expected term (in years)	7		6.5		6
	Risk-free interest rate	2.21%		1.66%		1.21%
	Fair value of stock options granted	$26.06		$21.57		$15.01
Summary of Stock Options Outstanding	The following table summarizes information about stock options outstanding at December 31, 2014:
			Stock Options Outstanding									Stock Options Exercisable
	Range of Exercise Prices		Shares			Weighted Average Remaining Contractual Term (in years)		Weighted Average Exercise Price Per Share				Shares		Weighted Average Exercise Price Per Share
	$60.49-$71.28		172,877			4.1		$	69.76			170,127		$	69.88
	$77.00-$80.45		187,900			5.5		$	80.16			145,725		$	80.09
	$82.64-$82.80		197,900			7.1		$	82.8			84,750		$	82.8
	$88.04-$110.76		167,667			2.7		$	88.77			166,327		$	88.59
			726,344									566,929
Changes in Nonvested Restricted Stock Units and Restricted Stock
	Performance-based Restricted Stock Units		Shares			Weighted Average Grant-Date Fair Value Per Share				Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value
	Nonvested Shares at December 31, 2013		139,418			$	84.22			2.1		$	17.1
	Granted		125,122			$	90.73
	Adjustment For Shares Earned Against Target (1)		7,026
	Vested		(48,698	)		$	83.59
	Forfeited		(19,817	)		$	83.8
	Nonvested Shares at December 31, 2014 (2)		203,051			$	88.4			2.1		$	24.6
	(1) Represents share adjustment as a result of final performance against specified performance targets.
	(2) Represents the number of shares expected to be issued based on achievement of grant date performance targets. The
	actual number of shares issued will depend on the company’s actual performance against specified targets during the
	performance periods.
Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan [Table Text Block]	The total stock-based compensation expense and expected tax benefit are as follows:
			For the Years Ended December 31,
			2014				2013				2012
	Stock-based Compensation Expense:
	Restricted Stock Units/Restricted Stock		$	9.7			$	6.3			$	6.1
	Stock Options		0.9				1.7				3.8
	ESPP		0.8				0.7				0.7
	Total Compensation Expense		$	11.4			$	8.7			$	10.6
			For the Years Ended December 31,
			2014				2013				2012
	Expected Tax Benefit:
	Restricted Stock Units/Restricted Stock		$	3.5			$	2.3			$	2.3
	Stock Options		0.3				0.6				1.4
	Total Expected Tax Benefit		$	3.8			$	2.9			$	3.7
Schedule of share based payment award performance units with market condition valuation assumptions [Table Text Block]	As these awards contain a market condition, we have calculated the fair value on the date of grant using a Monte Carlo simulation model with the following weighted average assumptions:
		2014		2013		2012
	Expected stock price volatility	27%		25%		N/A
	Expected dividend yield	1.60%		2.00%		N/A
	Expected term (in years)	2.8		2.8		N/A
	Risk-free interest rate	0.60%		0.33%		N/A
	Fair value of Performance Units granted	$72.54		$86.59		N/A
Schedule of Share Based Compensation, Service based Restricted Stock Units [Table Text Block]	Changes in our nonvested service-based restricted stock units for the year ended December 31, 2014 are summarized as follows:
	Service-based Restricted Stock Units		Shares			Weighted Average Grant-Date Fair Value Per Share				Weighted Average Remaining Contractual Term (in years)		Aggregate Intrinsic Value
	Nonvested Shares at December 31, 2013		120,008			$	81.83			1.6		$	14.7
	Granted		88,523			$	104.44
	Vested		(23,357	)		$	82.51
	Forfeited		(18,861	)		$	82.29
	Nonvested Shares at December 31, 2014		166,313			$	93.72			1.6		$	20.1

Lease_Commitments_and_Contract1

Lease Commitments and Contractual Obligations Lease Commitments and Contractual Obligations (Tables)	12 Months Ended
	Dec. 31, 2014
Leases [Abstract]
Future Contractual Obligations	The following table quantifies our future contractual obligations as discussed above as of December 31, 2014:
	Contractual Obligations	2015		2016		2017		2018		2019		Thereafter		Total
	Operating Leases	$	29.4	$	24.5	$	16.2	$	14.1	$	13	$	49.4	$	146.6
	Obligations to Outsourcers	$	135.7	$	76.5	$	12.7	$	2.9	$	—	$	—	$	227.8

Segment_Information_Tables

Segment Information (Tables)	12 Months Ended
	Dec. 31, 2014
Segment Reporting [Abstract]
Segment Information, Revenue and Operating Income (Loss)
		For the Years Ended December 31,
		2014			2013			2012
	Revenue:
	North America	$	1,248.80		$	1,233.90		$	1,225.60
	Asia Pacific	181.7			178.3			174.2
	Europe and Other International Markets	251.2			241.4			241.2
	Consolidated Core	1,681.70			1,653.60			1,641.00
	Divested and Other Businesses	0.1			1.6			22
	Consolidated Total	$	1,681.80		$	1,655.20		$	1,663.00
	Operating Income (Loss):
	North America	$	397.8		$	407.4		$	480.9
	Asia Pacific	28.8			19			4.7
	Europe and Other International Markets	75.3			72.9			68.8
	Total Segments	501.9			499.3			554.4
	Corporate and Other (1)	(80.4		)	(62.2		)	(122.3		)
	Consolidated Total	421.5			437.1			432.1
	Non-Operating Income (Expense) – Net	(72.9		)	(41.1		)	(53.8		)
	Income Before Provision for Income Taxes and Equity in Net Income of Affiliates	$	348.6		$	396		$	378.3
	Depreciation and Amortization (2):
	North America	$	34.8		$	41.6		$	41.8
	Asia Pacific	13.3			14.4			17.2
	Europe and Other International Markets	12.2			12.2			13
	Total Segments	60.3			68.2			72
	Corporate and Other	2.8			3			6.3
	Consolidated Total	$	63.1		$	71.2		$	78.3
	Capital Expenditures (3):
	North America	$	7.6		$	3.7		$	2.2
	Asia Pacific	3.4			3.2			4.4
	Europe and Other International Markets	0.6			1.9			0.3
	Total Segments	11.6			8.8			6.9
	Corporate and Other	0.6			0.7			0.1
	Consolidated Total	$	12.2		$	9.5		$	7
	Additions to Computer Software and Other Intangibles (4):
	North America	$	22.7		$	25		$	21.2
	Asia Pacific	5.3			4.4			5.4
	Europe and Other International Markets	5.6			6.7			6.7
	Total Segments	33.6			36.1			33.3
	Corporate and Other	8.1			9.5			34.1
	Consolidated Total	$	41.7		$	45.6		$	67.4
			At December 31,
			2014			2013			2012
	Assets (5):
	North America		$	821.1		$	843.2		$	795.4
	Asia Pacific		355.8			371.9			414.6
	Europe and Other International Markets		488.8			445.4			365.7
	Total Segments		1,665.70			1,660.50			1,575.70
	Corporate and Other (primarily taxes)		320.5			229.8			416.1
	Consolidated Total		$	1,986.20		$	1,890.30		$	1,991.80
	Goodwill (6):
	North America		$	268.5		$	265.1		$	266.5
	Asia Pacific		199.9			210.2			234
	Europe and Other International Markets		106.8			113.8			110.6
	Consolidated Total		$	575.2		$	589.1		$	611.1
	-1	The following table summarizes “Corporate and Other:”
		For the Years Ended December 31,
		2014			2013			2012
	Corporate Costs (a)	$	(62.0	)	$	(40.9	)	$	(49.1	)
	Restructuring Expense	(14.9		)	(13.9		)	(29.4		)
	Strategic Technology Investment or MaxCV	—			—			(30.3		)
	Legal Fees and Other Shut-Down Costs Associated with Matters in China	(3.5		)	(7.4		)	(13.5		)
	Total Corporate and Other	$	(80.4	)	$	(62.2	)	$	(122.3	)
	(a) The increase of $21.1 million in Corporate Costs for the year ended December 31, 2014 as compared to December 31, 2013
	was primarily due to higher compensation and professional costs in 2014 associated with our strategic activities.
-2	Includes depreciation and amortization of Property, Plant and Equipment, Computer Software and Other Intangibles.
The decrease of $8.1 million for the year ended December 31, 2014 as compared to December 31, 2013 was primarily attributed to lower software amortization in 2014 in the North America segment as a result of the impairment of technology software assets in the fourth quarter of 2013 related to our data management infrastructure (data supply chain).
The decrease of $7.1 million for the year ended December 31, 2013 as compared to December 31, 2012 was primarily attributed to software assets that became fully depreciated in 2012 and the divestiture of the domestic portion of our Japanese operations to TSR Ltd.
-3	The increase of $3.9 million in capital expenditures in the North America segment for the year ended December 31, 2014 as compared to December 31, 2013 was primarily driven by the purchase of computer hardware related to the DNBi infrastructure upgrade.
-4	The decrease of $2.3 million in additions to computer software and other intangibles in the North America segment for the year ended December 31, 2014 as compared to December 31, 2013 was mainly due to nonrecurring purchases in the prior year related to MaxCV.
The increase of $3.8 million in additions to computer software and other intangibles in the North America segment for the year ended December 31, 2013 as compared to December 31, 2012 was mainly attributed to the purchase of perpetual licenses of third-party software.
The decrease of $24.6 million in additions to computer software and other intangibles in “Corporate and Other” for the year ended December 31, 2013 as compared to December 31, 2012 was primarily due to our then non-recurring Strategic Technology Investment or MaxCV related software additions that occurred in the prior year.
-5	The decrease in assets in the North America segment to $821.1 million at December 31, 2014 from $843.2 million at December 31, 2013 was primarily due to normal software amortization and the impairment charge related to the sale of the Parsippany, New Jersey building.
The increase in assets in the North America segment to $843.2 million at December 31, 2013 from $795.4 million at December 31, 2012 was primarily due to increases in cash and computer software. The increase in cash was mainly a function of timing, while the increase in computer software was primarily due to the purchase of perpetual licenses of third-party software.
The decrease in assets in the Asia Pacific segment to $355.8 million at December 31, 2014 from $371.9 million and $414.6 million at December 31, 2013 and 2012, respectively, was primarily due to the negative impact of foreign currency translation.
The increase in assets in the Europe and Other International Markets segment to $488.8 million at December 31, 2014 from $445.4 million and $365.7 million at December 31, 2013 and 2012, respectively, was primarily due to an increase in cash as a result of operational performance in the region.
The increase in assets in “Corporate and Other” to $320.5 million at December 31, 2014 from $229.8 million at December 31, 2013 was primarily due to increased deferred tax assets as a result of the remeasurement of our pension plan obligations in the fourth quarter of 2014.
The decrease in assets in “Corporate and Other” to $229.8 million at December 31, 2013 from $416.1 million at December 31, 2012 was primarily due to reduced deferred tax assets as a result of the remeasurement of our pension plan obligations in the fourth quarter of 2013 and a reduction in cash.
-6	Goodwill in the North America segment increased to $268.5 million at December 31, 2014 from $265.1 million at December 31, 2013. The increase was primarily a result of two small acquisitions.
Goodwill in the Asia Pacific segment decreased to $199.9 million at December 31, 2014 from $210.2 million and $234.0 million at December 31, 2013 and, 2012, respectively. This decrease was primarily due to the negative impact of foreign currency translation.
Goodwill in the Europe and Other International Markets decreased to $106.8 million at December 31, 2014 from $113.8 million at December 31, 2013, primarily due to the negative impact of foreign currency translation.
Supplemental Geographic and Customer Solution Set Information:
		At December 31,
		2014			2013			2012
Long-Lived Assets (7):
North America		$	400.1		$	453.5		$	484.3
Asia Pacific		270.5			290			333.9
Europe and Other International Markets		147.6			162.8			164.9
Consolidated Total		$	818.2		$	906.3		$	983.1
-7	Long-lived assets in North America decreased to $400.1 million at December 31, 2014 from $453.5 million at December 31, 2013. This decline was primarily driven by a reduction of a contractual receipt under a tax allocation agreement between Moody’s Corporation and Dun & Bradstreet as it relates to the effective settlement of audits for the 2007 - 2009 tax years and the expiration of a statute of limitations for the 2010 tax year, normal software amortization, and the impairment charge related to the sale of the Parsippany, New Jersey building. In addition, the remaining asset balance for the Parsippany, New Jersey building was reclassified to “Current Asset Held For Sale.”
Long-lived assets in North America decreased to $453.5 million at December 31, 2013 from $484.3 million at December 31, 2012. This decrease was due to an impairment charge primarily related to technology and software assets that were primarily related to our data management infrastructure (data supply chain). We can improve data collection through other commercially available means, as needed.
Long-lived assets in the Asia Pacific segment decreased to $270.5 million at December 31, 2014 from $290.0 million and $333.9 million at December 31, 2013, and 2012, respectively. This was primarily attributable to the negative impact of foreign currency translation.
Long-lived assets in Europe and Other International Markets decreased to $147.6 million at December 31, 2014 from $162.8 million at December 31, 2013, primarily due to the negative impact of foreign currency translation.
Supplemental Geographic and Customer Solution Set Information
		For the Years Ended December 31,
		2014			2013			2012
	Customer Solution Set Revenue:
	North America:
	Risk Management Solutions	$	691.7		$	693.2		$	700.6
	Sales & Marketing Solutions	557.1			540.7			525
	North America Core Revenue	1,248.80			1,233.90			1,225.60
	Divested and Other Businesses (8)	—			—			—
	Total North America Revenue	$	1,248.80		$	1,233.90		$	1,225.60
	Asia Pacific:
	Risk Management Solutions	$	158.9		$	154.5		$	147.5
	Sales & Marketing Solutions	22.8			23.8			26.7
	Asia Pacific Core Revenue	181.7			178.3			174.2
	Divested and Other Businesses (8)	—			1			21.3
	Total Asia Pacific Revenue	$	181.7		$	179.3		$	195.5
	Europe and Other International Markets:
	Risk Management Solutions	$	204.2		$	197.7		$	198.8
	Sales & Marketing Solutions	47			43.7			42.4
	Europe and Other International Markets Core Revenue	251.2			241.4			241.2
	Divested and Other Businesses (8)	0.1			0.6			0.7
	Total Europe and Other International Markets Revenue	$	251.3		$	242		$	241.9
	Consolidated Total:
	Risk Management Solutions	$	1,054.80		$	1,045.40		$	1,046.90
	Sales & Marketing Solutions	626.9			608.2			594.1
	Core Revenue	1,681.70			1,653.60			1,641.00
	Divested and Other Businesses (8)	0.1			1.6			22
	Consolidated Total Revenue	$	1,681.80		$	1,655.20		$	1,663.00
	(8) During the year ended December 31, 2014, we ceased the operations of our small Ireland Corporation Registry Business. This business has been classified as “Divested and Other Businesses.”
	During the year ended December 31, 2013, we ceased the operations of our India Event Planning and Rural Marketing Businesses. During the year ended December 31, 2012, we completed (a) the sale of: (i) the domestic portion of our Japanese operations to TSR Ltd.; (ii) our market research business in China, consisting of two joint venture companies; and (iii) a research and advisory services business in India; and (b) the shut-down of our Roadway operations. These businesses have been classified as “Divested and Other Businesses.” These Divested and Other Businesses contributed less than 1% and 11% to our Asia Pacific total revenue for the years ended December 31, 2013 and 2012, respectively.
	During the year ended December 31, 2012, we completed the sale of: (i) AllBusiness.com, Inc.; (ii) Purisma Incorporated; and (iii) a small supply management company. These businesses have been classified as “Divested and Other Businesses.”
	The following table represents Divested and Other Businesses revenue by solution set:
		For the Years Ended December 31,
		2014			2013			2012
	Divested and Other Businesses:
	Risk Management Solutions	$	0.1		$	0.6		$	10
	Sales & Marketing Solutions	—			1			12
	Total Divested and Other Businesses Revenue	$	0.1		$	1.6		$	22

Supplemental_Financial_Data_Ta

Supplemental Financial Data (Tables)	12 Months Ended
	Dec. 31, 2014
Supplemental Financial Information [Abstract]
Schedule of Accrued Liabilities [Table Text Block]	Other Accrued and Current Liabilities:
		At December 31,
		2014				2013
	Restructuring Accruals	$	9.9			$	10.4
	Professional Fees	31.4				34.6
	Operating Expenses	43.2				39
	Other Accrued Liabilities	29.7				32.1
		$	114.2			$	116.1
Property, Plant and Equipment at Cost - Net	Property, Plant and Equipment – Net:
			At December 31,
			2014				2013
	Land		$	1.1			$	5.7
	Buildings		23.7				33.5
	Furniture		60.8				59.5
			85.6				98.7
	Less: Accumulated Depreciation		66.2				68.3
			19.4				30.4
	Leasehold Improvements, less:
	Accumulated Amortization of $16.5 and $15.6 as of December 31, 2014 and 2013, respectively		8				9.2
	Property, Plant and Equipment – Net (1)		$	27.4			$	39.6
	-1	The decrease in Property, Plant and Equipment – Net is primarily due to reclassification to "Current Assets Held for Sale" for the Parsippany, New Jersey building. See Note 1 and Note 7 to our consolidated financial statements included in this Annual Report on Form 10-K for further detail.
Other Income (Expense) - Net	Other Income (Expense) – Net:
			For the Years Ended December 31,
			2014				2013			2012
	Effect of Legacy Tax Matters (2)		$	(28.6	)		$	0.8		$	(14.8	)
	Gain (Loss) on Sale of Businesses (3)		—				—			6.1
	Miscellaneous Other Income (Expense) – Net (4)		(2.7		)		(2.5		)	(6.4		)
	Other Income (Expense) – Net		$	(31.3	)		$	(1.7	)	$	(15.1	)
	-2	During the year ended December 31, 2014, we recognized the reduction of a contractual receipt under a tax allocation agreement between Moody's Corporation and Dun & Bradstreet as it relates to the effective settlement of audits for the 2007 - 2009 tax years and the expiration of a statute of limitations for the 2010 tax year. During the year ended December 31, 2012, we recognized the reduction of a contractual receipt under a tax allocation agreement between Moody's Corporation and Dun & Bradstreet as it relates to the expiration of the statute of limitations for the tax years 2005 and 2006.
	-3	During the year ended December 31, 2012, we recognized gains primarily related to the sale of: (i) the domestic portion of our Japanese operations to TSR Ltd.; (ii) Purisma Incorporated; and (iii) our market research business in China, consisting of two joint venture companies.
	-4	Miscellaneous Other Income (Expense) - Net decreased for the year ended December 31, 2013 compared to the year ended December 31, 2012, primarily due to one-time costs of $5.8 million incurred in 2012 to accelerate the redemption of our senior notes with a face value of $400 million that were scheduled to mature on April 1, 2013, partially offset by the negative impact of foreign currency translation.
Computer Software and Goodwill	Computer Software and Goodwill:
			Computer Software				Goodwill
	1-Jan-13		$	140.9			$	611.1
	Additions at Cost (5)		43.5				—
	Amortization		(46.9		)		—
	Write-offs (6)		(31.3		)		—
	Other (7)		1.7				(22.0		)
	31-Dec-13		107.9				589.1
	Additions at Cost (8)		39.6				7.3
	Amortization		(39.7		)		—
	Write-offs		(1.2		)		—
	Other (7)		(2.9		)		(21.2		)
	31-Dec-14		$	103.7			$	575.2
	(5) Computer Software - Amount mainly due to the purchase of perpetual licenses of third party software.
	-6	Computer Software - This decrease is due to impairment charges primarily related to (i) technology and software assets that were primarily related to our data management infrastructure (data supply chain) in our North America segment. We can improve data collection through other commercially available means, as needed; and (ii) our China Trade Portal (“Portal”) asset in our Asia Pacific segment resulting from lower than expected product revenue. We decided to sunset the Portal product and migrate our existing Portal customers to an enhanced version of our existing DUNS Registered Seal product.
	(7) Computer Software and Goodwill - Primarily due to the impact of foreign currency fluctuations.
	(8) Computer Software and Goodwill:
	Computer Software - Primarily due to software related enhancements on Dun & Bradstreet products and the purchase of
	third party licenses.
	Goodwill - Related to two immaterial acquisitions.
Other Intangibles (included in Non-Current Assets)	Other Intangibles (included in Non-Current Assets):
			Customer Relationships				Trademark and Other			Total
	January 1, 2013		$	29.6			$	69.7		$	99.3
	Additions		—				0.6			0.6
	Amortization		(4.1		)		(11.7		)	(15.8		)
	Write-offs		—				(0.4		)	(0.4		)
	Other (9)		5.5				(12.5		)	(7.0		)
	December 31, 2013 (10)		31				45.7			76.7
	Acquisitions		0.8				0.5			1.3
	Additions		—				1.1			1.1
	Amortization		(4.0		)		(11.1		)	(15.1		)
	Other		(1.1		)		(1.3		)	(2.4		)
	December 31, 2014 (10)		$	26.7			$	34.9		$	61.6
Allowance for Doubtful Accounts	Allowance for Doubtful Accounts:
	1-Jan-12		$	17.1
	Additions charged to costs and expenses		15.2
	Write-offs		(7.2		)
	Recoveries		2.1
	Other		0.1
	31-Dec-12		27.3
	Additions charged to costs and expenses		3
	Write-offs		(9.7		)
	Recoveries		3.2
	Other		0.1
	31-Dec-13		23.9
	Additions charged to costs and expenses		1.8
	Write-offs		(6.0		)
	Recoveries		1.5
	Other		(0.2		)
	31-Dec-14		$	21
Deferred Tax Asset Valuation Allowance	Deferred Tax Asset Valuation Allowance:
	1-Jan-12		$	38.1
	Additions charged (credited) to costs and expenses		(1.6		)
	Additions charged (credited) due to foreign currency fluctuations		—
	Additions charged (credited) to other accounts		(1.1		)
	31-Dec-12		35.4
	Additions charged (credited) to costs and expenses		2.7
	Additions charged (credited) due to foreign currency fluctuations		1.2
	Additions charged (credited) to other accounts		(1.0		)
	31-Dec-13		38.3
	Additions charged (credited) to costs and expenses		1.9
	Additions charged (credited) due to foreign currency fluctuations		(2.6		)
	Additions charged (credited) to other accounts		(0.7		)
	31-Dec-14		$	36.9

Quarterly_Financial_Informatio1

Quarterly Financial Information Quarterly Financial Information (Tables)	12 Months Ended
	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Information
		For the Three Months Ended
		March 31,			June 30,			September 30,			December 31,			Full Year
	2014
	Revenue:
	North America	$	279		$	284.6		$	305.3		$	379.9		$	1,248.80
	Asia Pacific	41.7			46.4			47.2			46.4			181.7
	Europe and Other International Markets	61.2			62			64.6			63.5			251.3
	Consolidated Revenue	$	381.9		$	393		$	417.1		$	489.8		$	1,681.80
	Operating Income (Loss):
	North America	$	78		$	79.9		$	88.2		$	151.7		$	397.8
	Asia Pacific	6.2			7.7			7.7			7.2			28.8
	Europe and Other International Markets	16.7			18.2			19.4			21			75.3
	Total Segments	100.9			105.8			115.3			179.9			501.9
	Corporate and Other (1)	(18.6		)	(20.8		)	(18.5		)	(22.5		)	(80.4		)
	Consolidated Operating Income	82.3			85			96.8			157.4			421.5
	Net Income	86			50.9			68.4			92.6			297.9
	Less: Net (Income) Loss Attributable to the Noncontrolling Interest	(0.7		)	(1.0		)	(0.9		)	(0.9		)	(3.5		)
	Net Income Attributable to Dun & Bradstreet	$	85.3		$	49.9		$	67.5		$	91.7		$	294.4
	Basic Earnings Per Share of Common Stock Attributable to Dun & Bradstreet Common Shareholders (2)	$	2.28		$	1.36		$	1.87		$	2.55		$	8.06
	Diluted Earnings Per Share of Common Stock Attributable to Dun & Bradstreet Common Shareholders (2)	$	2.26		$	1.35		$	1.85		$	2.53		$	7.99
	Cash Dividends Paid Per Common Share	$	0.44		$	0.44		$	0.44		$	0.44		$	1.76
		For the Three Months Ended
		March 31,			June 30,			September 30,			December 31,			Full Year
	2013
	Revenue:
	North America	$	283.2		$	278.7		$	305.8		$	366.2		$	1,233.90
	Asia Pacific	41.4			49.3			44.4			44.2			179.3
	Europe and Other International Markets	56.4			58.4			60.9			66.3			242
	Consolidated Revenue	$	381		$	386.4		$	411.1		$	476.7		$	1,655.20
	Operating Income (Loss):
	North America	$	86		$	84.5		$	112.3		$	124.6		$	407.4
	Asia Pacific	2.4			8.4			5.1			3.1			19
	Europe and Other International Markets	14			15.7			19.7			23.5			72.9
	Total Segments	102.4			108.6			137.1			151.2			499.3
	Corporate and Other (1)	(14.6		)	(14.7		)	(16.6		)	(16.3		)	(62.2		)
	Consolidated Operating Income	87.8			93.9			120.5			134.9			437.1
	Net Income	53.6			58.4			73.5			76.6			262.1
	Less: Net (Income) Loss Attributable to the Noncontrolling Interest	(0.7		)	(0.9		)	(0.7		)	(1.3		)	(3.6		)
	Net Income Attributable to Dun & Bradstreet	$	52.9		$	57.5		$	72.8		$	75.3		$	258.5
	Basic Earnings Per Share of Common Stock Attributable to Dun & Bradstreet Common Shareholders (2)	$	1.3		$	1.46		$	1.89		$	1.98		$	6.61
	Diluted Earnings Per Share of Common Stock Attributable to Dun & Bradstreet Common Shareholders (2)	$	1.29		$	1.44		$	1.87		$	1.96		$	6.54
	Cash Dividends Paid Per Common Share	$	0.4		$	0.4		$	0.4		$	0.4		$	1.6
	-1	The following table itemizes the components of the “Corporate and Other” category of Operating Income (Loss):
		For the Three Months Ended
		March 31,			June 30,			September 30,			December 31,			Full Year
	2014
	Corporate Costs	$	(13.4	)	$	(14.6	)	$	(15.3	)	(18.7		)	$	(62.0	)
	Restructuring Expense	(4.9		)	(5.0		)	(2.0		)	(3.0		)	(14.9		)
	Legal and Other Professional Fees and Shut-Down Costs Related to Matters in China	(0.3		)	(1.2		)	(1.2		)	(0.8		)	(3.5		)
	Total Corporate and Other	$	(18.6	)	$	(20.8	)	$	(18.5	)	$	(22.5	)	$	(80.4	)
		For the Three Months Ended
		March 31,			June 30,			September 30,			December 31,			Full Year
	2013
	Corporate Costs	$	(10.7	)	$	(8.8	)	$	(9.6	)	$	(11.8	)	$	(40.9	)
	Restructuring Expense	(2.3		)	(2.2		)	(6.1		)	(3.3		)	(13.9		)
	Legal and Other Professional Fees and Shut-Down Costs Related to Matters in China	(1.6		)	(3.7		)	(0.9		)	(1.2		)	(7.4		)
	Total Corporate and Other	$	(14.6	)	$	(14.7	)	$	(16.6	)	$	(16.3	)	$	(62.2	)
	-2	The number of weighted average shares outstanding changes as common shares are issued for employee benefit plans and other purposes or as shares are repurchased. For this reason, the sum of quarterly earnings per share may not be the same as earnings per share for the year.

Description_of_Business_and_Su3

Description of Business and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended						3 Months Ended		12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012		Mar. 31, 2012	Dec. 31, 2014	Dec. 31, 2015
			condition								segment
			segment
			business_record
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Carrying Value of the Components of the Asset Group to be Sold	$15,300,000
Translation Adjustment Functional to Reporting Currency, Increase (Decrease), Gross of Tax			100,000		100,000		900,000
Number of business records			240,000,000							240,000,000
Number of Operating Segments			3
Number of conditions to be met for Revenue Recognition			4
Contract term			1 year
Depreciation and Amortization			63,100,000	[1]	71,200,000	[1]	78,300,000	[1]
Amortization of Computer Software			39,700,000		46,900,000		49,200,000
Capitalized Computer Software, Net		107,900,000	103,700,000		107,900,000		140,900,000			103,700,000
Impairment of Assets	7,300,000	31,300,000	7,300,000		33,300,000		16,100,000
Expected Sales Price	8,500,000		8,500,000							8,500,000
Fair Value of Asset on Nonrecurring Basis			0							0
Property, Plant and Equipment [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Depreciation and Amortization			8,300,000		8,100,000		11,200,000
Building [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Estimated useful lives			40 years
Minimum [Member] | Equipment [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Estimated useful lives			3 years
Maximum [Member] | Equipment [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Estimated useful lives			10 years
Internally developed software for Internal Use [Member] | Minimum [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Finite-lived intangible asset, useful life			3 years
Internally developed software for Internal Use [Member] | Maximum [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Finite-lived intangible asset, useful life			8 years
Software Development [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Finite-lived intangible asset, useful life			3 years
Other Intangible Assets [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Other intangibles amortization expense			15,100,000		15,900,000		17,300,000
Other Intangible Assets [Member] | Minimum [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Finite-lived intangible asset, useful life			1 year
Other Intangible Assets [Member] | Maximum [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Finite-lived intangible asset, useful life			16 years
Shanghai Roadway D&B Marketing Services Co Ltd [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Impairment of Assets									12,900,000
Accounts Payable [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Capitalized Computer Software, Net		2,900,000	1,900,000		2,900,000					1,900,000
Shanghai Roadway - Intangibles, Prepaid costs, and software [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Fair Value of Asset on Nonrecurring Basis									0
Operating Expense [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Impairment of Assets		28,600,000								28,600,000
Operating Expense [Member] | Shanghai Roadway D&B Marketing Services Co Ltd [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Impairment of Assets									4,100,000
Selling, General and Administrative Expenses [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Impairment of Assets		2,700,000								2,700,000
Selling, General and Administrative Expenses [Member] | Shanghai Roadway D&B Marketing Services Co Ltd [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Impairment of Assets									8,800,000
China Trade Portal [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Impairment of Assets		1,700,000
Fair Value of Asset on Nonrecurring Basis		0			0
Building and Building Improvements [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Carrying Value of the Components of the Asset Group to be Sold	9,900,000
Land [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Carrying Value of the Components of the Asset Group to be Sold	4,700,000
Furniture and Fixtures [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Carrying Value of the Components of the Asset Group to be Sold	300,000
Machinery and Equipment [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Carrying Value of the Components of the Asset Group to be Sold	$400,000
Scenario, Forecast [Member]
Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items]
Number of Operating Segments											2
[1]	Includes depreciation and amortization of Property, Plant and Equipment, Computer Software and Other Intangibles. The decrease of $8.1 million for the year ended December 31, 2014 as compared to December 31, 2013 was primarily attributed to lower software amortization in 2014 in the North America segment as a result of the impairment of technology software assets in the fourth quarter of 2013 related to our data management infrastructure (data supply chain).The decrease of $7.1 million for the year ended December 31, 2013 as compared to December 31, 2012 was primarily attributed to software assets that became fully depreciated in 2012 and the divestiture of the domestic portion of our Japanese operations to TSR Ltd.

Future_Amortization_of_Acquire

Future Amortization of Acquired Intangible Assets (Details) (USD $)	3 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Asset Impairment Charges	$7.30	$31.30	$7.30	$33.30	$16.10
Total			61.6
2013			12.2
2014			11.3
2015			7.5
2016			6.2
2017			5.3
Thereafter			19.1
China Trade Portal [Member]
Asset Impairment Charges		$1.70

Restructuring_Charge_Additiona

Restructuring Charge - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended			3 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2013
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges	$7.30	$31.30	$7.30	$33.30	$16.10
Restructuring Charge			14.9	13.9	29.4
Severance and Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charge			13	8.2	22.7
One-time Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charge					5
Lease Termination Obligations and Other Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges						0.5
Restructuring Charge			1.9	5.7	6.7
Restructuring Plan, Scenario 1 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charge			14.9
Number of employees exited			145
Expected number of positions eliminated			10
Restructuring Plan, Scenario 1 [Member] | Severance and Termination [Member]
Restructuring Cost and Reserve [Line Items]
Number of employees impacted			155
Restructuring Plan, Scenario 1 [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charge			13
Restructuring Plan, Scenario 1 [Member] | Lease Termination Obligations and Other Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charge			1.9
Restructuring Plan, Scenario 2 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charge				13.9
Number of employees exited			20	140
Restructuring Plan, Scenario 2 [Member] | Severance and Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charge				8.2
Number of employees impacted				160
Restructuring Plan, Scenario 2 [Member] | Lease Termination Obligations and Other Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charge				5.7
Restructuring Plan, Scenario 3 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charge					29.4
Number of employees exited				75	690
Restructuring Plan, Scenario 3 [Member] | Severance and Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charge					17.7
Number of employees impacted					765
Restructuring Plan, Scenario 3 [Member] | Lease Termination Obligations and Other Exit Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charge					$6.70

Restructuring_Reserves_and_Uti

Restructuring Reserves and Utilization Related to Financial Flexibility Initiatives (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013		Dec. 31, 2012
Restructuring Reserve [Rollforward]
Beginning Balance	$10.40	$11.70		$10.50
Charge Taken during the period	14.9	13.9		29.4
Payments for Restructuring	15.4	14.7		28.2
Payments for Restructuring and Asset Impairment Related to Lease Termination		15.2	[1]
Ending Balance	9.9	10.4		11.7
Severance and Termination [Member]
Restructuring Reserve [Rollforward]
Beginning Balance	5.8	9.4		8.3
Charge Taken during the period	13	8.2		22.7
Payments for Restructuring	10.7			21.6
Payments for Restructuring and Asset Impairment Related to Lease Termination		11.8	[1]
Ending Balance	8.1	5.8		9.4
Lease Termination Obligations and Other Exit Costs [Member]
Restructuring Reserve [Rollforward]
Beginning Balance	4.6	2.3		2.2
Charge Taken during the period	1.9	5.7		6.7
Payments for Restructuring	4.7			6.6
Payments for Restructuring and Asset Impairment Related to Lease Termination		3.4	[1]
Ending Balance	$1.80	$4.60		$2.30
[1]	We incurred an asset impairment of $0.5 million in the first quarter of 2013 related to the termination of a lease.

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive income Accumulated Other Comprrehensive Income (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss)	($922.10)	($738.80)	($852.10)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	-203.7	92.4
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	20.4	20.9
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss)	-233.4	-186.7	-151.2
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	-46.7	-35.5
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0	0
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss)	-688.7	-552.2	-701
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	-156.9	127.9
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	20.4	20.9
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss)	0	0.1	0.1
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	-0.1	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	$0	$0

Accumulated_Other_Comprehensiv3

Accumulated Other Comprehensive income Reclassification out of Accumulated other Comprehensive Income (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Income Tax Expense (Benefit)	($52.60)	($135.50)	($83.10)
Other Income (Expense) - Net	-31.3	-1.7	-15.1
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Net Income (Loss) Available to Common Stockholders, Basic	20.4	20.9	14.6
Other Income (Expense) - Net	0	0	0.3
Accumulated Translation Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Other Income (Expense) [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax	0	0	-1.3
Accumulated Defined Benefit Plans Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	32.9	33.4	23.5
Income Tax Expense (Benefit)	-12.5	-12.5	-7.7
Net Income (Loss) Available to Common Stockholders, Basic	20.4	20.9	15.8
Accumulated Defined Benefit Plans Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Selling, General and Administrative Expenses [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Amortization of Prior Service (Cost) Credit, Before Tax (Income) Expense of $(0.8) in 2014 and $(3.3) in 2013	-1.5	-6.4	-7.1
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax	24.9	30.5	24.6
Accumulated Defined Benefit Plans Adjustment [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Operating Expense [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Amortization of Prior Service (Cost) Credit, Before Tax (Income) Expense of $(0.8) in 2014 and $(3.3) in 2013	-0.6	-2.5	-2.5
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax	10.1	11.8	8.5
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest	0	0	2
Income Tax Expense (Benefit)	0	0	-1.9
Net Income (Loss) Available to Common Stockholders, Basic	0	0	0.1
Cash Flow Hedging [Member] | Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Interest Income (Expense), Net	$0	$0	$1.70

Income_Taxes_Income_before_Pro

Income Taxes - Income before Provision for Income Taxes (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
U.S.	$221.10	$319.50	$295.10
Non-U.S.	127.5	76.5	83.2
Income Before Provision for Income Taxes and Equity in Net Income of Affiliates	$348.60	$396	$378.30

Income_Taxes_Provision_for_Inc

Income Taxes - Provision for Income Taxes (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
U.S. Federal	$2.80	$81.60	$45.90
State and Local	11.7	8.3	6.8
Non-U.S.	23.6	21.2	10.3
Total Current Tax Provision	38.1	111.1	63
U.S. Federal	6.6	30.8	15.4
State and Local	4.3	-2.6	3.1
Non-U.S.	3.6	-3.8	1.6
Total Deferred Tax Provision	14.5	24.4	20.1
Provision for Income Taxes	$52.60	$135.50	$83.10

Income_Taxes_Significant_Diffe

Income Taxes - Significant Differences between U.S. Federal Statutory Tax Rate and Effective Tax Rate for Financial Statement Purposes (Details)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Income Tax Disclosure [Abstract]
Statutory Tax Rate	35.00%		35.00%		35.00%
State and Local Taxes, net of U.S. Federal Tax Benefits	3.00%		0.90%		1.50%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent	4.60%		0.40%		2.80%
Effective Income Tax Rate Reconciliation, US Taxes on Foreign Income	1.40%		1.30%		1.00%
Non-U.S. Taxes	-1.60%		-1.70%		-3.30%
Valuation Allowance	-0.10%		0.40%		-0.70%
Interest	-1.90%		0.50%		-0.80%
Tax Credits and Deductions	-5.90%		-3.20%		-3.30%
Tax Contingencies Related to Uncertain Tax Positions	-4.80%		0.40%		0.50%
Impact of Legacy Tax Matters (1)	-14.90%	[1]	0.00%	[1]	-6.90%	[1]
Loss on Investment	0.00%		0.00%		-4.10%
Other	0.30%		0.20%		0.30%
Effective Tax Rate	15.10%		34.20%		22.00%
[1]	The impact for 2014 was due to the release of reserves for uncertain tax positions due to the effective settlement of audits for the 2007 - 2009 tax years and the expiration of the statute of limitations for the 2010 tax year.The impact for 2012 was due to the release of reserves for uncertain tax positions due to the expiration of the statute of limitations for the 2005 - 2006 tax years.

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Line Items]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$27.30
Income taxes, net of refunds	109.4	126.1	110.2
Income taxes refunded	1.5	4.9	7
Undistributed earnings of non-U.S. subsidiaries	753.1
Operating Losses	33.6	41.9
Valuation allowance against U.S. and non-U.S. net operating losses	24.5	26.8	25.2
Decrease in unrecognized tax benefits	76.6
Gross unrecognized tax benefits	29.2	105.8	100.7
Expected decrease in unrecognized tax benefits in next twelve months	22
Interest expense related to unrecognized tax benefits	1.2	2.5	2.7
Accrued interest expense related to unrecognized tax benefits	3.4	10.4
Tax Credit Carryforwards with Indefinite Carryforward Period [Member]
Income Taxes [Line Items]
Operating Losses	28.4
Tax Credit Carryforwards Expiring Between 2013 and 2032 [Member]
Income Taxes [Line Items]
Operating Losses	$5.20

Income_Taxes_Deferred_Tax_Asse

Income Taxes - Deferred Tax Assets (Liabilities) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Millions, unless otherwise specified
Deferred Tax Assets:
Operating Losses	$33.60	$41.90
Restructuring Costs	2.6	2.6
Bad Debts	4.5	5.2
Accrued Expenses	16.2	12.6
Capital Loss and Credit Carryforwards	17.7	11.5
Other	0.7	2
Pension and Postretirement Benefits	223.1	145.9
Total Deferred Tax Assets	298.4	221.7
Valuation Allowance	-36.9	-38.3	-35.4	-38.1
Net Deferred Tax Assets	261.5	183.4
Deferred Tax Liabilities:
Intangibles	-30.1	-35.7
Fixed Assets	-3.9	-4.2
Other	-2.7	-0.7
Total Deferred Tax Liabilities	-36.7	-40.6
Net Deferred Tax Assets	$224.80	$142.80

Income_Taxes_Reconciliation_of

Income Taxes - Reconciliation of Gross Unrecognized Tax Benefits (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$27.30
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	22
Unrecognized Tax Benefits, Interest on Income Taxes Expense	1.2		2.5	2.7
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Gross Unrecognized Tax Benefits, Beginning of Period	105.8		100.7	120.1
Additions for Prior Years' Tax Positions	2.1		7.7	5.1
Additions for Current Years' Tax Positions	1		0.5	5.1
Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities	-4		-1
Unrecognized Tax Benefits, Decrease Resulting from Foreign Currency Translation	-0.2		-0.5
Addition due to CTA				0.3
Reduction in Prior Years' Tax Positions (2)	-57.1	[1]	-0.4	-28.7	[2]
Reduction Due to Expired Statute of Limitations (3)	-18.4	[3]	-1.2	-1.2
Gross Unrecognized Tax Benefits, End of Period	29.2		105.8	100.7
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$3.40		$10.40
[1]	The decrease is primarily due to the release of reserves for uncertain tax positions due to the effective settlement of audits for the 2007 - 2009 tax years.
[2]	The decrease is primarily due to the release of reserves for uncertain tax positions due to the expiration of the statute of limitations for the 2005 - 2006 tax years.
[3]	The decrease is primarily due to the release of reserves due to the expiration of the statute of limitations for the 2010 tax year.

Notes_Payable_and_Indebtedness2

Notes Payable and Indebtedness - Additional Information (Detail) (USD $)	12 Months Ended			34 Months Ended	3 Months Ended	1 Months Ended		3 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014	Mar. 31, 2012	Dec. 31, 2012	Nov. 29, 2010	Dec. 31, 2010	Dec. 31, 2011	Jan. 30, 2008	Mar. 11, 2012	Mar. 28, 2008	Jul. 23, 2014
Debt Instrument [Line Items]
Debt carrying amount	$747,700,000	$1,047,000,000		$747,700,000
Long-Term Fixed-Rate Notes, discount	2,300,000	3,000,000		2,300,000
Derivative, Notional Amount										400,000,000
Contingent liability under open standby letters of credit in favor of third parties	4,600,000	4,700,000		4,600,000
Interest paid for all outstanding debt	42,500,000	39,900,000	41,800,000
Interest Rate Contract [Member]
Debt Instrument [Line Items]
Gain (loss) recognized in income on derivatives			300,000
Cash received from interest rate derivatives terminated			5,000,000
Carrying amount of hedged debt	1,200,000			1,200,000							4,900,000
Amortization of carrying amount of hedged debt				1,300,000
Interest Rate Contract [Member] | Non-Operating Income (Expenses) - Net [Member]
Debt Instrument [Line Items]
Gain (loss) recognized in income on derivatives	0	0	800,000		800,000
Interest Rate Contract [Member] | Long-Term Fixed-Rate Notes [Member] | Non-Operating Income (Expenses) - Net [Member]
Debt Instrument [Line Items]
Gain (loss) recognized in income on derivatives	0	0	-500,000		-500,000
Senior Notes Due 2013 [Member]
Debt Instrument [Line Items]
Long-Term Fixed-Rate Notes, annual interest rate			6.00%			6.00%
Repayment of long-term fixed-rate notes			400,000,000			400,000,000
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax												-8,500,000
Senior Notes Due 2013 [Member] | Non-Operating Income (Expenses) - Net [Member]
Debt Instrument [Line Items]
Long-Term Fixed-Rate Notes, premium payment			5,400,000
Senior Notes Due 2013 [Member] | Interest Rate Contract [Member] | Non-Operating Income (Expenses) - Net [Member]
Debt Instrument [Line Items]
Long-Term Fixed-Rate Notes, underwriting and other fees			100,000
Gain (loss) recognized in income on derivatives			-300,000
Senior Notes Due 2017 and 2022 [Member]
Debt Instrument [Line Items]
Debt Rating Decrease Threshold	3			3
Maximum adjustments above initial interest rate	2.00%			2.00%
Senior Notes Due 2017 [Member]
Debt Instrument [Line Items]
Long-Term Fixed-Rate Notes issued, face value			450,000,000			450,000,000
Long-Term Fixed-Rate Notes, maturity date						1-Dec-17
Long-Term Fixed-Rate Notes, annual interest rate			3.25%			3.25%
Debt carrying amount	450,000,000			450,000,000
Long-Term Fixed-Rate Notes, discount	100,000		100,000	100,000		100,000
Long-Term Fixed-Rate Notes, underwriting and other fees			3,400,000
Senior Notes Due 2022 [Member]
Debt Instrument [Line Items]
Long-Term Fixed-Rate Notes issued, face value			300,000,000			300,000,000
Long-Term Fixed-Rate Notes, maturity date						1-Dec-22
Long-Term Fixed-Rate Notes, annual interest rate			4.38%			4.38%
Debt carrying amount	297,700,000			297,700,000
Long-Term Fixed-Rate Notes, discount	2,300,000		2,900,000	2,300,000		2,900,000
Long-Term Fixed-Rate Notes, underwriting and other fees			2,500,000
Senior Notes Due November 2015 [Member]
Debt Instrument [Line Items]
Long-Term Fixed-Rate Notes issued, face value							300,000,000
Long-Term Fixed-Rate Notes, maturity date							15-Nov-15
Long-Term Fixed-Rate Notes, annual interest rate							2.88%
Notes Payable, Current	299,800,000	0		299,800,000
Long-Term Fixed-Rate Notes, discount	200,000			200,000			1,100,000
Long-Term Fixed-Rate Notes, underwriting and other fees							2,500,000
Senior Notes Due March 2011 [Member]
Debt Instrument [Line Items]
Long-Term Fixed-Rate Notes, maturity date							15-Mar-11
Long-Term Fixed-Rate Notes, annual interest rate							5.50%
Repayment of long-term fixed-rate notes								300,000,000
Long-Term Fixed-Rate Notes, premium payment									3,700,000
Revolving Credit Facility October 2016 [Member]
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity	1,000,000,000	800,000,000		1,000,000,000									1,000,000,000
Number of days from issuance	364 days
Commercial papers borrowings supported by line of credit	800,000,000			800,000,000
Credit facility Outstanding amount	604,500,000	466,500,000		604,500,000
Credit facility, interest percentage	1.38%	1.24%
International Operations [Member]
Debt Instrument [Line Items]
Uncommitted credit facility, maximum borrowing capacity	1,800,000	2,600,000		1,800,000
Interest Rate Contract [Member] | Fair Value Hedging [Member]
Debt Instrument [Line Items]
Derivative, Notional Amount							125,000,000
Interest Rate Contract [Member] | Senior Notes Due November 2015 [Member] | Fair Value Hedging [Member]
Debt Instrument [Line Items]
Derivative, Notional Amount							$125,000,000	$125,000,000

Borrowings_Detail

Borrowings (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Nov. 29, 2010
In Millions, unless otherwise specified
Debt Instrument, Unamortized Discount	$2.30	$3
Fair Value Adjustment Related to Hedged Debt	0	2.5
Other	0.1	0.1
Total Debt Maturing Within One Year	301.1	0.1
Debt Maturing After One Year:
Long-Term Fixed-Rate Notes (Net of a $2.3 million and $3.0 million discount as of December 31, 2014 and 2013, respectively)	747.7	1,047
Fair Value Adjustment Related to Hedged Debt	0	2.5
Credit Facility	604.5	466.5
Total Debt Maturing After One Year	1,352.20	1,516
Senior Notes Due November Twenty Fifteen [Member]
Debt Instrument, Unamortized Discount	0.2		1.1
Fair Value Adjustment Related to Hedged Debt	1.2	0
Notes Payable, Current	299.8	0
Debt Maturing After One Year:
Fair Value Adjustment Related to Hedged Debt	$1.20	$0

Financial_Instruments_Addition

Financial Instruments - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended			3 Months Ended	34 Months Ended	3 Months Ended	1 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014	Dec. 31, 2014	Mar. 31, 2012	Nov. 29, 2010	Jan. 30, 2008	Mar. 11, 2012	Mar. 28, 2008	Dec. 31, 2010
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, Notional Amount										$400,000,000
Maximum Remaining Maturity of Foreign Currency Derivatives			12 months
Realized gains associated with derivatives contracts			15,100,000	17,500,000	20,400,000
Realized loss associated with derivatives contracts			23,000,000	24,700,000	14,300,000
Unrealized gains associated with derivatives contracts			400,000	400,000	100,000
Unrealized loss associated with derivatives contracts			-100,000	-400,000	-400,000
Impairment of Assets	7,300,000	31,300,000	7,300,000	33,300,000	16,100,000
Expected Sales Price	8,500,000		8,500,000			8,500,000	8,500,000
Fair Value of Asset on Nonrecurring Basis			0			0	0
Operating Expense [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of Assets		28,600,000				28,600,000
Selling, General and Administrative Expenses [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of Assets		2,700,000				2,700,000
Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) recognized in income on derivatives					300,000
Cash received from interest rate derivatives terminated					5,000,000
Carrying amount of hedged debt			1,200,000			1,200,000	1,200,000				4,900,000
Amortization of carrying amount of hedged debt							1,300,000
Interest Rate Contract [Member] | Non-Operating Income (Expenses) - Net [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) recognized in income on derivatives			0	0	800,000			800,000
Interest Rate Contract [Member] | Non-Operating Income (Expenses) - Net [Member] | Long-Term Fixed-Rate Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) recognized in income on derivatives			0	0	-500,000			-500,000
Senior Notes Due November 2015 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-Term Fixed-Rate Notes, face value									300,000,000
Debt Related Commitment Fees and Debt Issuance Costs									2,500,000
Senior Notes Due 2013 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax												-8,500,000
Senior Notes Due 2013 [Member] | Interest Rate Contract [Member] | Non-Operating Income (Expenses) - Net [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) recognized in income on derivatives					-300,000
Debt Related Commitment Fees and Debt Issuance Costs					100,000
Shanghai Roadway D&B Marketing Services Co Ltd [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of Assets								12,900,000
Shanghai Roadway - Intangibles, Prepaid costs, and software [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value of Asset on Nonrecurring Basis								0
Shanghai Roadway D&B Marketing Services Co Ltd [Member] | Operating Expense [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of Assets								4,100,000
Shanghai Roadway D&B Marketing Services Co Ltd [Member] | Selling, General and Administrative Expenses [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of Assets								8,800,000
Foreign Exchange Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, Notional Amount		295,400,000	296,400,000	295,400,000		296,400,000	296,400,000
Foreign Exchange Contract [Member] | Non-Operating Income (Expenses) - Net [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) recognized in income on derivatives			-7,600,000	-6,800,000	5,700,000
Interest Rate Contract [Member] | Fair Value Hedging [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, Notional Amount									125,000,000
Interest Rate Contract [Member] | Senior Notes Due November 2015 [Member] | Fair Value Hedging [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, Notional Amount									125,000,000				125,000,000
China Trade Portal [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of Assets		1,700,000
Fair Value of Asset on Nonrecurring Basis		$0		$0

Fair_Values_of_Derivative_Inst

Fair Values of Derivative Instruments in Consolidated Balance Sheet (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Derivatives, Fair Value [Line Items]
Assets Derivatives	$0.40	$0.40
Liabilities Derivative	0.1	0.4
Derivatives not designated as hedging instruments [Member]
Derivatives, Fair Value [Line Items]
Assets Derivatives	0.4	0.4
Liabilities Derivative	0.1	0.4
Derivatives not designated as hedging instruments [Member] | Other Accrued and Current Liabilities [Member] | Foreign exchange forward contracts [Member]
Derivatives, Fair Value [Line Items]
Liabilities Derivative	0.1	0.4
Derivatives not designated as hedging instruments [Member] | Other Current Assets [Member] | Foreign exchange forward contracts [Member]
Derivatives, Fair Value [Line Items]
Assets Derivatives	$0.40	$0.40

Effect_of_Derivative_Instrumen

Effect of Derivative Instruments on Consolidated Statement of Operations and Comprehensive Income (Detail) (USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Forward exchange contracts [Member] | Non-Operating Income (Expenses) - Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Recognized in Income on Derivative		($7.60)	($6.80)	$5.70
Foreign exchange option contracts [Member] | Non-Operating Income (Expenses) - Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Recognized in Income on Derivative		0	0	-0.2
Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Recognized in Income on Derivative				0.3
Interest Rate Contract [Member] | Non-Operating Income (Expenses) - Net [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Recognized in Income on Derivative	0.8	0	0	0.8
Interest Rate Contract [Member] | Non-Operating Income (Expenses) - Net [Member] | Long-Term Fixed-Rate Notes [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Recognized in Income on Derivative	($0.50)	$0	$0	($0.50)

Assets_and_Liabilities_Measure

Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)	34 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Sep. 30, 2014	Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying Value of the Components of the Asset Group to be Sold			$15.30
Assets:
Cash Equivalents	126.1	[1]		95.9	[1]
Other Current Assets [Member] | Foreign exchange forward contracts [Member]
Assets:
Assets measured at fair value	0.4	[2]		0.4	[2]
Other Accrued and Current Liabilities [Member] | Foreign exchange forward contracts [Member]
Liabilities:
Liabilities measured at fair value	0.1	[2]		0.4	[2]
Quoted Prices in Active Markets for Identical Assets (Level I) [Member]
Assets:
Cash Equivalents	126.1	[1]		95.9	[1]
Quoted Prices in Active Markets for Identical Assets (Level I) [Member] | Other Current Assets [Member] | Foreign exchange forward contracts [Member]
Assets:
Assets measured at fair value	0	[2]		0	[2]
Quoted Prices in Active Markets for Identical Assets (Level I) [Member] | Other Accrued and Current Liabilities [Member] | Foreign exchange forward contracts [Member]
Liabilities:
Liabilities measured at fair value	0	[2]		0	[2]
Significant Other Observable Inputs (Level II) [Member]
Assets:
Cash Equivalents	0	[1]		0	[1]
Significant Other Observable Inputs (Level II) [Member] | Other Current Assets [Member] | Foreign exchange forward contracts [Member]
Assets:
Assets measured at fair value	0.4	[2]		0.4	[2]
Significant Other Observable Inputs (Level II) [Member] | Other Accrued and Current Liabilities [Member] | Foreign exchange forward contracts [Member]
Liabilities:
Liabilities measured at fair value	0.1	[2]		0.4	[2]
Significant Unobservable Inputs (Level III) [Member]
Assets:
Cash Equivalents	0	[1]		0	[1]
Significant Unobservable Inputs (Level III) [Member] | Other Current Assets [Member] | Foreign exchange forward contracts [Member]
Assets:
Assets measured at fair value	0	[2]		0	[2]
Significant Unobservable Inputs (Level III) [Member] | Other Accrued and Current Liabilities [Member] | Foreign exchange forward contracts [Member]
Liabilities:
Liabilities measured at fair value	0	[2]		0	[2]
Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amortization of Financing Costs	$1.30
[1]	Cash equivalents represent fair value as it consists of highly liquid investments with an original maturity of three months or less.
[2]	Primarily represents foreign currency forward contracts. Fair value is determined utilizing a market approach and considers a factor for nonperformance in the valuation.

Carrying_Amount_and_Estimated_

Carrying Amount and Estimated Fair Value of Asset (Liability) (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, Long-term and Short-term, Combined Amount	$1,047.50	$1,047
Credit Facilities, Carrying Amount (Asset) Liability	604.5	466.5
Fair Value (Asset) Liability [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, Long-term and Short-term, Combined Amount	1,082.10	1,054.80
Credit Facilities, Fair Value (Asset) Liability	$625.40	$466.10

Capital_Stock_Capital_Stock_De

Capital Stock Capital Stock (Details) (USD $)	0 Months Ended
In Billions, except Share data, unless otherwise specified	Feb. 24, 2009	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stockholders Equity Note [Line Items]
Shares authorized		220,000,000
Common Stock, authorized		200,000,000
Common stock, par value		$0.01	$0.01	$0.01
Preferred stock, shares authorized		10,000,000
Preferred stock, par value		$0.01
Series Common Stock [Member]
Stockholders Equity Note [Line Items]
Common Stock, authorized		10,000,000	10,000,000
Common stock, par value		$0.01	$0.01
Series A Junior Participating Preferred Stock [Member]
Stockholders Equity Note [Line Items]
Preferred stock, shares authorized		500,000	500,000
Preferred stock, par value		$0.01	$0.01
Series B Preferred Stock [Member]
Stockholders Equity Note [Line Items]
Preferred stock, shares authorized	1,400,000	1,400,000
Preferred stock, par value		$0.01
Percentage of Series B preferred stock	4.00%
Preferred stock, shares issued	1,345,757
Outstanding intercompany debt	$1.20

Earnings_Per_Share_Additional_

Earnings Per Share - Additional Information (Detail) (USD $)

12 Months Ended

49 Months Ended

1 Months Ended

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Oct. 31, 2014

30-May-10

Sep. 30, 2012

Aug. 31, 2012

Oct. 31, 2011

Feb. 28, 2009

Aug. 31, 2014

Weighted average restricted shares outstanding

11,658

Stock-based awards to acquire shares of common stock outstanding but not included in computation of diluted earnings per share (in shares)

19,320

99,154

1,345,796

Options, expiration period

10 years

Treasury Stock, Shares, Acquired

2,111,652

4,508,199

6,837,190

Maximum [Member]

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period

5 years

Maximum [Member] | Performance based Restricted Stock Units [Member]

Share Based Compensation Arrangement by Share Based Payment Awards, Equity Instruments Other than Options, Percentage of the Target Award Ultimately Received by employee

200.00%

Minimum [Member]

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period

3 years

Minimum [Member] | Performance based Restricted Stock Units [Member]

Share Based Compensation Arrangement by Share Based Payment Awards, Equity Instruments Other than Options, Percentage of the Target Award Ultimately Received by employee

0.00%

Common Stock Repurchase Program [Member]

Treasury Stock, Shares, Acquired

1,570,326

[1]

3,545,513

[1]

6,483,144

[1]

Repurchase Program To Mitigate Dilutive Effect [Member]

Treasury Stock, Shares, Acquired

541,326

[2]

962,686

[2]

354,046

[2]

2,682,492

Stock Repurchase Plan One [Member] | Common Stock Repurchase Program [Member]

Stock Repurchase Program, Authorized Amount

$1,000,000,000

$500,000,000

$500,000,000

Stock Repurchase Plan Twenty Zero Nine [Member] | Common Stock Repurchase Program [Member]

Stock Repurchase Program, Authorized Amount

200,000,000

Share Repurchase Program Twenty Ten [Member] | Repurchase Program To Mitigate Dilutive Effect [Member]

Stock Repurchase Program, Period in Force

4 years

Stock Repurchase Program, Number of Shares Authorized to be Repurchased

5,000,000

Share Repurchase Program Twenty Fourteen [Member] | Repurchase Program To Mitigate Dilutive Effect [Member]

Stock Repurchase Program, Authorized Amount

$100,000,000

[1]

In August 2012, our Board of Directors approved a $500 million increase to our then-existing $500 million share repurchase program, for a total program authorization of $1 billion. The then-existing $500 million share purchase program was approved by our Board of Directors in October 2011 and commenced in November 2011 upon completion of the previous $200 million share repurchase program. This program was completed in August 2014.

[2]

In May 2010, our Board of Directors approved a four-year, five million share repurchase program to mitigate the dilutive effect of the shares issued under our stock incentive plans and ESPP. This program commenced in October 2010 and expired in October 2014. Of the 5,000,000 shares that were authorized for repurchase under this program, 2,682,492 shares were repurchased at the time this program expired in October 2014.

Earnings_Per_Share_Detail

Earnings Per Share (Detail) (USD $)	3 Months Ended																12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Earnings Per Share [Abstract]
Net Income Attributable to Dun & Bradstreet	$91.70		$67.50		$49.90		$85.30		$75.30		$72.80		$57.50		$52.90		$294.40		$258.50		$295.50
Participating Securities, Distributed and Undistributed Earnings (Loss), Basic and Diluted																	0		0		0.1
Net Income Attributable to Dun & Bradstreet Common Shareholders – Basic and Diluted																	$294.40		$258.50		$295.40
Weighted Average Number of Shares Outstanding - Basic (in shares)																	36.5		39.1		45.6
Dilutive Effect of Our Stock Incentive Plans (in shares)																	0.4		0.4		0.4
Weighted Average Number of Shares Outstanding - Diluted (in shares)																	36.9		39.5		46
Basic Earnings Per Share of Common Stock Attributable to D&B Common Shareholders (in dollars per share)	$2.55	[1]	$1.87	[1]	$1.36	[1]	$2.28	[1]	$1.98	[1]	$1.89	[1]	$1.46	[1]	$1.30	[1]	$8.06	[1]	$6.61	[1]	$6.47
Diluted Earnings Per Share of Common Stock Attributable to D&B Common Shareholders (in dollars per share)	$2.53	[1]	$1.85	[1]	$1.35	[1]	$2.26	[1]	$1.96	[1]	$1.87	[1]	$1.44	[1]	$1.29	[1]	$7.99	[1]	$6.54	[1]	$6.43
[1]	The number of weighted average shares outstanding changes as common shares are issued for employee benefit plans and other purposes or as shares are repurchased. For this reason, the sum of quarterly earnings per share may not be the same as earnings per share for the year.

Share_Repurchases_Detail

Share Repurchases (Detail) (USD $)	12 Months Ended						49 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012		Oct. 31, 2014
Accelerated Share Repurchases [Line Items]
Total number of share repurchases (in shares)	2,111,652		4,508,199		6,837,190
Total amount of share repurchases	$225		$420		$508
Share Repurchase Programs
Accelerated Share Repurchases [Line Items]
Total number of share repurchases (in shares)	1,570,326	[1]	3,545,513	[1]	6,483,144	[1]
Total amount of share repurchases	165		325		480.1
Repurchases to Mitigate the Dilutive Effect of the Shares Issued Under Our Stock Incentive Plans and Employee Stock Purchase Plan (ESPP)
Accelerated Share Repurchases [Line Items]
Total number of share repurchases (in shares)	541,326	[2]	962,686	[2]	354,046	[2]	2,682,492
Total amount of share repurchases	$60		$95		$27.90
[1]	In August 2012, our Board of Directors approved a $500 million increase to our then-existing $500 million share repurchase program, for a total program authorization of $1 billion. The then-existing $500 million share purchase program was approved by our Board of Directors in October 2011 and commenced in November 2011 upon completion of the previous $200 million share repurchase program. This program was completed in August 2014.
[2]	In May 2010, our Board of Directors approved a four-year, five million share repurchase program to mitigate the dilutive effect of the shares issued under our stock incentive plans and ESPP. This program commenced in October 2010 and expired in October 2014. Of the 5,000,000 shares that were authorized for repurchase under this program, 2,682,492 shares were repurchased at the time this program expired in October 2014.

Pension_and_Postretirement_Ben2

Pension and Postretirement Benefits - Changes in Benefit Obligations and Plan Assets for Pension and Postretirement Plans (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Change in Plan Assets:
Fair Value of Plan Assets at December 31	$1,516.90	$1,451.70
Amounts Recorded in the Consolidated Balance Sheets:
Pension and Postretirement Benefits	-588.2	-394.1
Accumulated Benefit Obligation	2,056.10	1,793.20
Pension Plans [Member]
Change in Benefit Obligation:
Benefit Obligation at January 1	-1,827.60	-1,972.10
Service Cost	-3.5	-4.8	-5.9
Interest Cost	-78.9	-70.2	-75.2
Benefits Paid	100.2	97.9
Direct Subsidies Received	0	0
Impact of Curtailment/Settlement	0.2	0
Plan Participant Contributions	-0.3	-0.4
Actuarial (Loss) Gain	-10.6	-3.3
Plan Amendment	0.1	0
Assumption Change	-285.5	127.4
Effect of Changes in Foreign Currency Exchange Rates	12.5	-2.1
Benefit Obligation at December 31	-2,093.40	-1,827.60	-1,972.10
Change in Plan Assets:
Fair Value of Plan Assets at January 1	1,451.70	1,318.80
Actual Return on Plan Assets	139.2	178.1
Employer Contributions	37.2	51.2
Direct Subsidies Received	0	0
Plan Participant Contributions	0.3	0.4
Settlement	-0.2	0
Benefits Paid	-100.2	-97.9
Effect of Changes in Foreign Currency Exchange Rates	-11.1	1.1
Fair Value of Plan Assets at December 31	1,516.90	1,451.70	1,318.80
Amount Recognized in Accumulated Other Comprehensive Income Consists of:
Actuarial Loss (Gain)	1,141.30	920.3
Prior Service Cost (Credit)	5.1	5.5
Total Amount Recognized - Pretax	1,146.40	925.8
Amounts Recorded in the Consolidated Balance Sheets:
Prepaid Pension Costs	1.8	3.4
Pension and Postretirement Benefits	-561	-362.9
Accrued Payroll	-17.3	-16.4
Net Amount Recognized	-576.5	-375.9
Accumulated Benefit Obligation	2,080.40	1,814.50
Funded Status of Plan	-576.5	-375.9
Other Postretirement Benefit Plan [Member]
Change in Benefit Obligation:
Benefit Obligation at January 1	-27.4	-27
Service Cost	-0.8	-0.8	-0.8
Interest Cost	-0.7	-0.7	-0.6
Benefits Paid	16.9	15.1
Direct Subsidies Received	-4.3	-2
Impact of Curtailment/Settlement	0	0
Plan Participant Contributions	-8.7	-10.1
Actuarial (Loss) Gain	0	-0.1
Plan Amendment	4.9	0
Assumption Change	-1.2	-1.8
Effect of Changes in Foreign Currency Exchange Rates	0	0
Benefit Obligation at December 31	-21.3	-27.4	-27
Change in Plan Assets:
Fair Value of Plan Assets at January 1	0	0
Actual Return on Plan Assets	0	0
Employer Contributions	3.9	3
Direct Subsidies Received	4.3	2
Plan Participant Contributions	8.7	10.1
Settlement	0	0
Benefits Paid	-16.9	-15.1
Effect of Changes in Foreign Currency Exchange Rates	0	0
Fair Value of Plan Assets at December 31	0	0	0
Amount Recognized in Accumulated Other Comprehensive Income Consists of:
Actuarial Loss (Gain)	-9.4	-11.6
Prior Service Cost (Credit)	-4.1	-1.6
Total Amount Recognized - Pretax	-13.5	-13.2
Amounts Recorded in the Consolidated Balance Sheets:
Prepaid Pension Costs	0	0
Pension and Postretirement Benefits	-18.6	-23.1
Accrued Payroll	-2.7	-4.3
Net Amount Recognized	-21.3	-27.4
Funded Status of Plan	($21.30)	($27.40)

Pension_and_Postretirement_Ben3

Pension and Postretirement Benefits - Underfunded or Unfunded Accumulated Benefit Obligation and Related Projected Benefit Obligation (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Compensation and Retirement Disclosure [Abstract]
Defined Benefit Plan, Pension Plans with Accumulated Benefit Obligations in Excess of Plan Assets, Aggregate Accumulated Benefit Obligation	$2,056.10	$1,793.20
Fair Value of Plan Assets	1,488.80	1,425
Unfunded Accumulated Benefit Obligation	567.3	368.2
Projected Benefit Obligation	$2,067.20	$1,804.40

Pension_and_Postretirement_Ben4

Pension and Postretirement Benefits - Components of Net Periodic (Income) Cost Associated with Pension Plans and Postretirement Benefit Obligations (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Pension Plans [Member]
Components of Net Periodic Cost (Income):
Service Cost	$3.50	$4.80	$5.90
Interest Cost	78.9	70.2	75.2
Expected Return on Plan Assets	-100.2	-94.1	-99.3
Amortization of Prior Service Cost (Credit)	0.3	0.3	0.3
Recognized Actuarial Loss (Gain)	36.1	43.7	35.6
Curtailment Charge	0.1	0	0
Net Periodic Cost (Income)	18.7	24.9	17.7
Postretirement Benefit Obligations
Components of Net Periodic Cost (Income):
Service Cost	0.8	0.8	0.8
Interest Cost	0.7	0.7	0.6
Expected Return on Plan Assets	0	0	0
Amortization of Prior Service Cost (Credit)	-2.4	-9.2	-9.9
Recognized Actuarial Loss (Gain)	-1.1	-1.4	-2.5
Curtailment Charge	0	0	0
Net Periodic Cost (Income)	($2)	($9.10)	($11)

Pension_and_Postretirement_Ben5

Pension and Postretirement Benefits - Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]
Other Comprehensive Income Amortization Of Net Actuarial Gain Loss Tax	($13.30)	($15.80)
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), Tax	-0.8	-3.3
Other Comprehensive Income Change In Net Actuarial Gain Loss Tax	-98.2	75.9
Prior Service Costs, Tax Income (Expense)	-1.9	0
Pension Plans [Member]
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Amortization of Actuarial (Loss) Gain, Before Tax (Income) Expense of $13.3 in 2014 and $15.8 in 2013	-36.1	-43.7
Amortization of Prior Service (Cost) Credit, Before Tax (Income) Expense of $(0.8) in 2014 and $(3.3) in 2013	-0.3	-0.3
Actuarial (Loss) Gain Arising During the Year, Before Tax (Income) Expense of $(98.2) in 2014 and $75.9 in 2013	-257.1	207.6
Prior Service Credit (Cost) Arising During the Year, Before Tax Expense (Income) of $1.9 in 2014 and $0.0 in 2013	0.1	0.1
Other Postretirement Benefit Plan [Member]
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income
Amortization of Actuarial (Loss) Gain, Before Tax (Income) Expense of $13.3 in 2014 and $15.8 in 2013	1.1	1.4
Amortization of Prior Service (Cost) Credit, Before Tax (Income) Expense of $(0.8) in 2014 and $(3.3) in 2013	2.4	9.2
Actuarial (Loss) Gain Arising During the Year, Before Tax (Income) Expense of $(98.2) in 2014 and $75.9 in 2013	-1.1	-4
Prior Service Credit (Cost) Arising During the Year, Before Tax Expense (Income) of $1.9 in 2014 and $0.0 in 2013	$4.90	$0

Pension_and_Postretirement_Ben6

Pension and Postretirement Benefits - Estimated Amortization from Accumulated Other Comprehensive Income (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Pension Plans [Member]
Estimated 2015 amortization from Accumulated Other Comprehensive Income
Actuarial Loss (Gain)	$43.10
Prior Service Cost (Credit)	0.2
Total	43.3
Other Postretirement Benefit Plan [Member]
Estimated 2015 amortization from Accumulated Other Comprehensive Income
Actuarial Loss (Gain)	-0.9
Prior Service Cost (Credit)	-1.6
Total	($2.50)

Pension_and_Postretirement_Ben7

Pension and Postretirement Benefits - Assumptions used to Determine Pension Plan and Postretirement Benefit Plan Obligations (Details)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted Average Discount Rate	3.62%		4.43%
Weighted Average Rate of Compensation Increase	5.99%		5.95%
Cash Balance Account Conversion Rate	3.88%	[1]	4.53%	[1]	4.47%	[1]
Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Cash Balance Account Interest Crediting Rate					4.45%	[1]
Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Cash Balance Account Conversion Rate	4.57%	[1]	3.50%	[1]
Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted Average Discount Rate	2.95%		3.18%
Minimum [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Cash Balance Account Interest Crediting Rate	4.45%	[1]	4.45%	[1]
Cash Balance Account Conversion Rate	1.40%	[1]	1.19%	[1]	1.99%	[1]
Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Cash Balance Account Interest Crediting Rate	4.45%	[1]	4.45%	[1]
Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Cash Balance Account Conversion Rate	1.25%	[1]	0.97%	[1]
Maximum [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Cash Balance Account Interest Crediting Rate	3.04%	[1]	3.80%	[1]
Cash Balance Account Conversion Rate	4.96%	[1]	5.66%	[1]	5.26%	[1]
Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Cash Balance Account Interest Crediting Rate	3.80%	[1]	3.00%	[1]
Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Cash Balance Account Conversion Rate	5.60%	[1]	4.60%	[1]
[1]	Only applicable to the U.S. Plans.

Pension_and_Postretirement_Ben8

Pension and Postretirement Benefits - Assumptions used to Determine Net Periodic Benefit Cost (Details)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted Average Discount Rate	4.41%		3.71%		4.30%
Weighted Average Expected Long-Term Return on Plan Assets	7.34%		7.15%		7.24%
Weighted Average Rate of Compensation Increase	5.78%		5.59%		5.80%
Cash Balance Account Interest Crediting Rate					4.45%	[1]
Cash Balance Account Conversion Rate	4.57%	[1]	3.50%	[1]
Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted Average Discount Rate	3.18%		2.59%		3.17%
Minimum [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Cash Balance Account Interest Crediting Rate	4.45%	[1]	4.45%	[1]
Cash Balance Account Conversion Rate	1.25%	[1]	0.97%	[1]
Maximum [Member] | Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Cash Balance Account Interest Crediting Rate	3.80%	[1]	3.00%	[1]
Cash Balance Account Conversion Rate	5.60%	[1]	4.60%	[1]
[1]	Only applicable to the U.S. Plans.

Pension_and_Postretirement_Ben9

Pension and Postretirement Benefits - Fair Value Hierarchy of Plan Assets at Fair Value (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
In Millions, unless otherwise specified
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$1,516.90	$1,451.70
Common and Preferred Stock [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	262.6	200.1
Common and Preferred Stock [Member] | Consumer [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	40	35.5
Common and Preferred Stock [Member] | Energy [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	15.8	15.8
Common and Preferred Stock [Member] | Financial [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	68.9	44.2
Common and Preferred Stock [Member] | Health Care [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	30.6	22.1
Common and Preferred Stock [Member] | Industrial [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	35.7	32.6
Common and Preferred Stock [Member] | Information Technology [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	58.5	36.9
Common and Preferred Stock [Member] | Other [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	9.3	11.8
Common and Preferred Stock [Member] | Preferred Stock [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	3.8	1.2
Commingled Funds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	967.8	982.6
Commingled Funds [Member] | Commingled Equity Funds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	476.9	580
Commingled Funds [Member] | Commingled Fixed Income Funds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	490.9	402.6
Bonds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	87	79.8
Bonds [Member] | Corporate Bonds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	72.8	67.2
Bonds [Member] | Other Bonds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	14.2	12.6
Government Bonds and Mortgage Backed Securities [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	110.3	89.2
Government Bonds and Mortgage Backed Securities [Member] | US Government Debt Securities [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	58.8	38.6
Government Bonds and Mortgage Backed Securities [Member] | Foreign Government Bonds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	4.7	2
Government Bonds and Mortgage Backed Securities [Member] | US Government Agencies Debt Securities [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	46.8	48.6
U.S. Government State and Local Debt Securities [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	6.3	7.3
Real Estate Investment [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	3.6	2.4
Real Estate Funds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	42.7	38.9
Short-term Investments [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	36.6	51.4
Fair Value, Inputs, Level 1 [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	325	241.1
Fair Value, Inputs, Level 1 [Member] | Common and Preferred Stock [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	262.6	200.1
Fair Value, Inputs, Level 1 [Member] | Common and Preferred Stock [Member] | Consumer [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	40	35.5
Fair Value, Inputs, Level 1 [Member] | Common and Preferred Stock [Member] | Energy [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	15.8	15.8
Fair Value, Inputs, Level 1 [Member] | Common and Preferred Stock [Member] | Financial [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	68.9	44.2
Fair Value, Inputs, Level 1 [Member] | Common and Preferred Stock [Member] | Health Care [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	30.6	22.1
Fair Value, Inputs, Level 1 [Member] | Common and Preferred Stock [Member] | Industrial [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	35.7	32.6
Fair Value, Inputs, Level 1 [Member] | Common and Preferred Stock [Member] | Information Technology [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	58.5	36.9
Fair Value, Inputs, Level 1 [Member] | Common and Preferred Stock [Member] | Other [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	9.3	11.8
Fair Value, Inputs, Level 1 [Member] | Common and Preferred Stock [Member] | Preferred Stock [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	3.8	1.2
Fair Value, Inputs, Level 1 [Member] | Commingled Funds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 1 [Member] | Commingled Funds [Member] | Commingled Equity Funds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 1 [Member] | Commingled Funds [Member] | Commingled Fixed Income Funds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 1 [Member] | Bonds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 1 [Member] | Bonds [Member] | Corporate Bonds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 1 [Member] | Bonds [Member] | Other Bonds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 1 [Member] | Government Bonds and Mortgage Backed Securities [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	58.8	38.6
Fair Value, Inputs, Level 1 [Member] | Government Bonds and Mortgage Backed Securities [Member] | US Government Debt Securities [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	58.8	38.6
Fair Value, Inputs, Level 1 [Member] | Government Bonds and Mortgage Backed Securities [Member] | Foreign Government Bonds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 1 [Member] | Government Bonds and Mortgage Backed Securities [Member] | US Government Agencies Debt Securities [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 1 [Member] | U.S. Government State and Local Debt Securities [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 1 [Member] | Real Estate Investment [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	3.6	2.4
Fair Value, Inputs, Level 1 [Member] | Real Estate Funds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 1 [Member] | Short-term Investments [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 2 [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	1,149.20	1,171.70
Fair Value, Inputs, Level 2 [Member] | Common and Preferred Stock [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 2 [Member] | Common and Preferred Stock [Member] | Consumer [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 2 [Member] | Common and Preferred Stock [Member] | Energy [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 2 [Member] | Common and Preferred Stock [Member] | Financial [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 2 [Member] | Common and Preferred Stock [Member] | Health Care [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 2 [Member] | Common and Preferred Stock [Member] | Industrial [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 2 [Member] | Common and Preferred Stock [Member] | Information Technology [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 2 [Member] | Common and Preferred Stock [Member] | Other [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 2 [Member] | Common and Preferred Stock [Member] | Preferred Stock [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 2 [Member] | Commingled Funds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	967.8	982.6
Fair Value, Inputs, Level 2 [Member] | Commingled Funds [Member] | Commingled Equity Funds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	476.9	580
Fair Value, Inputs, Level 2 [Member] | Commingled Funds [Member] | Commingled Fixed Income Funds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	490.9	402.6
Fair Value, Inputs, Level 2 [Member] | Bonds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	87	79.8
Fair Value, Inputs, Level 2 [Member] | Bonds [Member] | Corporate Bonds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	72.8	67.2
Fair Value, Inputs, Level 2 [Member] | Bonds [Member] | Other Bonds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	14.2	12.6
Fair Value, Inputs, Level 2 [Member] | Government Bonds and Mortgage Backed Securities [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	51.5	50.6
Fair Value, Inputs, Level 2 [Member] | Government Bonds and Mortgage Backed Securities [Member] | US Government Debt Securities [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 2 [Member] | Government Bonds and Mortgage Backed Securities [Member] | Foreign Government Bonds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	4.7	2
Fair Value, Inputs, Level 2 [Member] | Government Bonds and Mortgage Backed Securities [Member] | US Government Agencies Debt Securities [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	46.8	48.6
Fair Value, Inputs, Level 2 [Member] | U.S. Government State and Local Debt Securities [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	6.3	7.3
Fair Value, Inputs, Level 2 [Member] | Real Estate Investment [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 2 [Member] | Real Estate Funds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 2 [Member] | Short-term Investments [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	36.6	51.4
Fair Value, Inputs, Level 3 [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	42.7	38.9	34.8
Fair Value, Inputs, Level 3 [Member] | Common and Preferred Stock [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 3 [Member] | Common and Preferred Stock [Member] | Consumer [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 3 [Member] | Common and Preferred Stock [Member] | Energy [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 3 [Member] | Common and Preferred Stock [Member] | Financial [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 3 [Member] | Common and Preferred Stock [Member] | Health Care [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 3 [Member] | Common and Preferred Stock [Member] | Industrial [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 3 [Member] | Common and Preferred Stock [Member] | Information Technology [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 3 [Member] | Common and Preferred Stock [Member] | Other [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 3 [Member] | Common and Preferred Stock [Member] | Preferred Stock [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 3 [Member] | Commingled Funds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 3 [Member] | Commingled Funds [Member] | Commingled Equity Funds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 3 [Member] | Commingled Funds [Member] | Commingled Fixed Income Funds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 3 [Member] | Bonds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 3 [Member] | Bonds [Member] | Corporate Bonds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 3 [Member] | Bonds [Member] | Other Bonds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 3 [Member] | Government Bonds and Mortgage Backed Securities [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 3 [Member] | Government Bonds and Mortgage Backed Securities [Member] | US Government Debt Securities [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 3 [Member] | Government Bonds and Mortgage Backed Securities [Member] | Foreign Government Bonds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 3 [Member] | Government Bonds and Mortgage Backed Securities [Member] | US Government Agencies Debt Securities [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 3 [Member] | U.S. Government State and Local Debt Securities [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 3 [Member] | Real Estate Investment [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Fair Value, Inputs, Level 3 [Member] | Real Estate Funds [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	42.7	38.9
Fair Value, Inputs, Level 3 [Member] | Short-term Investments [Member]
Schedule of Pension and Other Postretirement Benefits Changes in Benefit Obligation and Fair Value of Plan Assets [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$0	$0

Recovered_Sheet1

Pension and Postretirement Benefits - Summary of Changes in Fair Value of all Plans' Level III Assets (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Actual return (loss) on plan assets:
Fair Value of Plan Assets at December 31	$1,516.90	$1,451.70
Fair Value, Inputs, Level 3 [Member]
Change in Plan Assets:
Fair Value of Plan Assets at January 1	38.9	34.8
Actual return (loss) on plan assets:
Related to assets still held at the reporting date	3.8	4.1
Related to assets sold during the period	0	0
Purchases, sales and settlements	0	0
Transfers in and/or out of Level III	0	0
Fair Value of Plan Assets at December 31	$42.70	$38.90

Recovered_Sheet2

Pension and Postretirement Benefits - Weighted Average Asset Allocations and Target Asset Allocations by Asset Category (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Schedule of Pension and Other Post Retirement Benefits Changes in Benefit Obligations and Fair Value of Plan Assets [Line Items]
Asset Allocations	100.00%	100.00%
Target Asset Allocations	100.00%	100.00%
Equity Securities [Member]
Schedule of Pension and Other Post Retirement Benefits Changes in Benefit Obligations and Fair Value of Plan Assets [Line Items]
Asset Allocations	50.00%	55.00%
Target Asset Allocations	50.00%	52.00%
Debt Securities [Member]
Schedule of Pension and Other Post Retirement Benefits Changes in Benefit Obligations and Fair Value of Plan Assets [Line Items]
Asset Allocations	47.00%	42.00%
Target Asset Allocations	47.00%	45.00%
Real Estate [Member]
Schedule of Pension and Other Post Retirement Benefits Changes in Benefit Obligations and Fair Value of Plan Assets [Line Items]
Asset Allocations	3.00%	3.00%
Target Asset Allocations	3.00%	3.00%

Recovered_Sheet3

Pension and Postretirement Benefits - Expected Benefit Payments from Pension Plans and Postretirement Plans through 2022 (Details) (USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
2015	$111.50
2016	114.8
2017	121.9
2018	120.3
2019	133.6
2020 - 2024	597.6
Other Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
2015	2.7
2016	2.5
2017	2.2
2018	2.1
2019	1.9
2020 - 2024	$8.20

Recovered_Sheet4

Pension and Postretirement Benefits - Healthcare Trend Assumptions used to Determine Year End Benefit Obligation (Details)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013
Medical [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	6.00%	[1]	6.00%	[1]
Prescription Drug Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	8.00%	[1]	8.00%	[1]
Fiscal Year 2020 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	5.00%
[1]	The rates are assumed to decrease to 5.0% in 2020 and remain at that level thereafter.

Recovered_Sheet5

Pension and Postretirement Benefits - Effect of a One-Percentage-Point Change in Assumed Health Care Cost Trend Rates (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Effect of One Percentage Point Increase on Accumulated Postretirement Benefit Obligation	($0.40)
Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation	0.6
Effect of One Percentage Point Increase on Service and Interest Cost Components	0
Effect of One Percentage Point Decrease on Service and Interest Cost Components	$0

Recovered_Sheet6

Pension and Postretirement Benefits - Additional Information (Detail) (USD $)	12 Months Ended						0 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012		Jun. 30, 2007	Dec. 31, 2015
	compensation_plan
Pension and Other Postretirement Benefits Disclosure [Line Items]
Defined Benefit Plan Pension, Plans With Projected Benefit Obligations In Excess Of Plan Assets, Unfunded Benefit Obligation	$567.30		$368.20
Number of frozen defined benefit pension plans	2
Net Pension And Other Postretirement Benefit Gain Not Yet Recognized In Earnings Net Of Tax	75.1		59.9
Projected Benefit Obligation Loss to be Amortized Threshold	10.00%
Amortization period range	5 years
Accumulated Benefit Obligation	2,056.10		1,793.20
Fair value of assets amortization period	5 years
Fair value of plan asset, ending balance	1,516.90		1,451.70
Asset Allocations	100.00%		100.00%
Target Asset Allocations	100.00%		100.00%
Employees' maximum contribution percentage	50.00%
Catch up contribution, minimum age	50 years
Employer matching contribution to employee	50.00%
Employer matching contribution to employee up to participant's eligible contribution	7.00%
Expense incurred related to 401(k) plan	8.5		0		13.6
Defined Contribution Plan, Employer Discretionary Contribution Amount					5.3
Pension Contributions	10		20
Qualified Pension Plan [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Percent of pension plan obligation	71.00%
Non-Qualified Pension Plans [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Percent of pension plan obligation	14.00%
Balances in Grantor Trusts fund	13.1		13.3
Pension Plans [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Actuarial Loss (Gain)	-1,141.30		-920.3
Accumulated Benefit Obligation	2,080.40		1,814.50
Market-related value of assets of our pension plans	1,441.80		1,391.80
Fair value of plan asset, ending balance	1,516.90		1,451.70		1,318.80
Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Cash Balance Account Interest Crediting Rate					4.45%	[1]
Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Cash Balance Account Conversion Rate	4.57%	[1]	3.50%	[1]
United States Plans [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Defined Benefit Plan Pension, Plans With Projected Benefit Obligations In Excess Of Plan Assets, Unfunded Benefit Obligation	547.3
Accumulated Benefit Obligation			329.6
Defined benefit plan, expected long-term rate of return	7.75%		7.75%		7.75%
Defined benefit plan, expected long-term rate of return for next fiscal year	7.75%
Non-U.S. plans [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Defined Benefit Plan Pension, Plans With Projected Benefit Obligations In Excess Of Plan Assets, Unfunded Benefit Obligation	20
Accumulated Benefit Obligation			38.6
Other Postretirement Benefit Plan [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Vesting service years	10 years
Actuarial Loss (Gain)	9.4		11.6
Amortization period range	8 years
Fair value of plan asset, ending balance	0		0		0
Defined Benefit Plan, Vesting Service Age, Minimum	45 years
Postretirement Health Coverage [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Defined Benefit Plan, Vesting Service Age, Minimum	65 years
Minimum [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Percentage of compensation allocated annually to a retirement account							3.00%
Minimum [Member] | Pension Plans [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Cash Balance Account Interest Crediting Rate	4.45%	[1]	4.45%	[1]
Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Cash Balance Account Conversion Rate	1.25%	[1]	0.97%	[1]
Minimum [Member] | United States Plans [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Amortization period range	8 years
Minimum [Member] | Non-U.S. plans [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Amortization period range	7 years
Maximum [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Percentage of compensation allocated annually to a retirement account							0.00%
Maximum [Member] | Pension Plans [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Cash Balance Account Interest Crediting Rate	3.80%	[1]	3.00%	[1]
Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Cash Balance Account Conversion Rate	5.60%	[1]	4.60%	[1]
Maximum [Member] | United States Plans [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Amortization period range	25 years
Maximum [Member] | Non-U.S. plans [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Amortization period range	37 years
Equity Securities [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Target Plan Asset Allocations	50.00%
Asset Allocations	50.00%		55.00%
Target Asset Allocations	50.00%		52.00%
Target Plan Asset Allocations Range Minimum	40.00%
Target Plan Asset Allocations Range Maximum	60.00%
Debt Securities [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Target Plan Asset Allocations	47.00%
Asset Allocations	47.00%		42.00%
Target Asset Allocations	47.00%		45.00%
Target Plan Asset Allocations Range Minimum	37.00%
Target Plan Asset Allocations Range Maximum	57.00%
Debt Securities [Member] | Maximum [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Asset Allocations	10.00%
Real Estate [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Target Plan Asset Allocations	3.00%
Asset Allocations	3.00%		3.00%
Target Asset Allocations	3.00%		3.00%
Target Plan Asset Allocations Range Minimum	0.00%
Target Plan Asset Allocations Range Maximum	6.00%
Scenario, Forecast [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Defined benefit plan, expected contribution to pension plans								22
Defined benefit plan, expected contribution to postretirement plan								$3
Prescription Drug Benefits [Member]
Pension and Other Postretirement Benefits Disclosure [Line Items]
Defined Benefit Plan, Vesting Service Age, Minimum	65 years
[1]	Only applicable to the U.S. Plans.

Employee_Stock_Plans_Additiona

Employee Stock Plans Additional Information (Details) (USD $)	3 Months Ended	12 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	5-May-09	2-May-07
		installment
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense recognized		$11.40	$8.70	$10.60
Expected tax benefit associated with stock-based compensation programs		3.8	2.9	3.7
Number of vesting installments		4
Stock options, vesting percentage		100.00%
Stock options, expiration period		10 years
Number of Stock Options, Exercisable at end of year		566,929	501,439	1,127,607
Intrinsic value of stock options exercised		4.3	20.8	8.4
Cash received from exercise of options		3.7
Tax benefit related to the total compensation cost for stock-based compensation arrangements		1.6
Expected Tax Benefit From Vesting Of Restricted Stock Units and Restricted Stock	4.5	2.8		3.9
Common stock, available for future grants, Employee Stock Purchase Plan		317,005
Employees can purchase our common stock, discount		15.00%
Purchase price of the stock on the date of purchase		85.00%
Shares issued under ESPP		42,958	50,277	58,417
Proceeds From Issuance Of Common Stock Under Employee Stock Plans		4
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock plan, vesting period		3 years
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock plan, vesting period		5 years
Common stock, authorized for Employee Stock Purchase Plan		1,500,000
Leveraged Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of vesting installments		3
Performance goal period		2 years
Stock plan, vesting period		1 year
Leveraged Restricted Stock Units [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance goal period		1 year
Share Based Compensation Arrangement by Share Based Payment Awards, Equity Instruments Other than Options, Percentage of the Target Award Ultimately Received by employee		0.00%
Leveraged Restricted Stock Units [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance goal period		3 years
Share Based Compensation Arrangement by Share Based Payment Awards, Equity Instruments Other than Options, Percentage of the Target Award Ultimately Received by employee		200.00%
Performance Units with Market Condition [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of vesting installments		2
Stock plan, vesting period		3 years
Performance Units with Market Condition [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangement by Share Based Payment Awards, Equity Instruments Other than Options, Percentage of the Target Award Ultimately Received by employee		0.00%
Performance Units with Market Condition [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangement by Share Based Payment Awards, Equity Instruments Other than Options, Percentage of the Target Award Ultimately Received by employee		200.00%
Performance Units with Performance Condition [Member] [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of vesting installments		2
Stock plan, vesting period		3 years
Performance Units with Performance Condition [Member] [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangement by Share Based Payment Awards, Equity Instruments Other than Options, Percentage of the Target Award Ultimately Received by employee		0.00%
Performance Units with Performance Condition [Member] [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangement by Share Based Payment Awards, Equity Instruments Other than Options, Percentage of the Target Award Ultimately Received by employee		200.00%
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance goal period		1 year
Stock plan, vesting period		3 years
Performance based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost		7.3
Unrecognized compensation cost, weighted average period of recognition		1 year 10 months 24 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		$90.73
Performance based Restricted Stock Units [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangement by Share Based Payment Awards, Equity Instruments Other than Options, Percentage of the Target Award Ultimately Received by employee		0.00%
Performance based Restricted Stock Units [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Arrangement by Share Based Payment Awards, Equity Instruments Other than Options, Percentage of the Target Award Ultimately Received by employee		200.00%
Performance based Restricted Stock Units and Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value			$0	$0
Service based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost		6.9
Unrecognized compensation cost, weighted average period of recognition		1 year 219 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value		$104.44
Service based Restricted Stock Units [Member] | Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock plan, vesting period		3 years
Service based Restricted Stock Units [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock plan, vesting period		5 years
Service based Restricted Stock Units and Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value			$0	$0
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense recognized		0.9	1.7	3.8
Expected tax benefit associated with stock-based compensation programs		0.3	0.6	1.4
Unrecognized compensation cost		0.6
Unrecognized compensation cost, weighted average period of recognition		1 year
Total fair value of stock options vested		2.7	4.2	4.8
Non Employee Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock plan, vesting period		3 years
Employee Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense recognized		0.8	0.7	0.7
Restricted Stock Awards and Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total stock-based compensation expense recognized		9.7	6.3	6.1
Expected tax benefit associated with stock-based compensation programs		3.5	2.3	2.3
Total fair value of restricted stock units and restricted stock vesting		$7.50	$12.10	$10.60
Stock Incentive Plan 2009 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, available for future grants		4,302,782	4,679,309	4,813,551
Stock Incentive Plan 2009 [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, authorized					5,400,000
Stock Incentive Plan 2000 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, available for issuance		1,133,539
Common stock, available for future grants		124,638	152,438	192,206
Before Amendment [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, authorized						300,000
After Amendment [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, authorized						700,000

Employee_Stock_Plans_Fair_Valu

Employee Stock Plans Fair Value of each Stock Option Award Estimated on Date of Grant Using Black-Scholes Option Valuation Model (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Share Based Payment Award, Leveraged Restricted Stock Units, Valuation Assumption [Line Items]
Expected stock price volatility	24.00%	23.00%	23.00%
Expected dividend yield	1.60%	1.60%	1.80%
Expected term (in years)	7 years	6 years 6 months	6 years
Weighted average risk-free interest rate	2.21%	1.66%	1.21%
Weighted average fair value of options granted	$26.06	$21.57	$15.01
Performance Units with Market Condition [Member]
Schedule of Share Based Payment Award, Leveraged Restricted Stock Units, Valuation Assumption [Line Items]
Expected stock price volatility	27.00%	25.00%
Expected dividend yield	1.60%	2.00%
Expected term (in years)	2 years 9 months 18 days	2 years 292 days
Weighted average risk-free interest rate	0.60%	0.33%
Weighted average fair value of options granted	$72.54	$86.59
Leveraged Restricted Stock Units [Member]
Schedule of Share Based Payment Award, Leveraged Restricted Stock Units, Valuation Assumption [Line Items]
Expected stock price volatility	26.00%	25.00%
Expected dividend yield	1.60%	1.90%
Expected term (in years)	3 years	3 years
Weighted average risk-free interest rate	0.64%	0.38%
Weighted average fair value of options granted	$92.37	$85.48

Employee_Stock_Plans_Changes_i

Employee Stock Plans Changes in Stock Options (Details) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Stock Options, Shares
Shares, Outstanding at beginning of year	855,747
Weighted Average Exercise Price Per Share, Outstanding at beginning of year	$79.23
Shares, Granted	1,340
Weighted Average Exercise Price Per Share, Granted	$110.76
Shares, Exercised	-112,093
Weighted Average Exercise Price Per Share, Exercised	$71.55
Shares, Forfeited or expired	-18,650
Weighted Average Exercise Price Per Share, Forfeited and expired	$82.28
Shares, Outstanding at end of year	726,344	855,747
Weighted Average Exercise Price Per Share, Outstanding at end of year	$80.39	$79.23
Weighted Average Remaining Contractual Term (in years), Outstanding at December 31, 2012	5 years	5 years 256 days
Aggregate Intrinsic Value, Outstanding at December 31, 2012	$29.50	$37.20
Exercisable and unvested expected to vest at December 31, 2012	724,258
Weighted Average Exercise Price Per Share, Exercisable and unvested expected to vest at December 31, 2012	$80.38
Weighted Average Remaining Contractual Term (in years), Exercisable and unvested expected to vest at December 31, 2012	5 years
Exercisable at December 31, 2014	566,929	501,439	1,127,607
Weighted Average Exercise Price Per Share, Exercisable at December 31, 2012	$79.93
Weighted Average Remaining Contractual Term (in years), Exercisable at December 31, 2012	4 years 146 days
Aggregate Intrinsic Value, Exercisable at December 31, 2012	23.3
Aggregate Intrinsic Value, Exercisable and unvested expected to vest at December 31, 2012	$29.40

Employee_Stock_Plans_Summary_o

Employee Stock Plans Summary of Stock Options Outstanding (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Stock Options Outstanding, Shares	726,344	855,747
Stock Options Outstanding, Weighted Average Remaining Contractual Term (in years)	5 years	5 years 256 days
Stock Options Outstanding, Weighted Average Exercise Price Per Share	$80.39	$79.23
Stock Options Exercisable, Shares	566,929	501,439	1,127,607
Stock Options Exercisable, Weighted Average Exercise Price Per Share	$79.93
$60.49-$71.28
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of per-share exercise prices, Lower Limit	$60.49
Range of per-share exercise prices, Upper Limit	$71.28
Stock Options Outstanding, Shares	172,877
Stock Options Outstanding, Weighted Average Remaining Contractual Term (in years)	4 years 1 month 6 days
Stock Options Outstanding, Weighted Average Exercise Price Per Share	$69.76
Stock Options Exercisable, Shares	170,127
Stock Options Exercisable, Weighted Average Exercise Price Per Share	$69.88
$77.00-$80.45
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of per-share exercise prices, Lower Limit	$77
Range of per-share exercise prices, Upper Limit	$80.45
Stock Options Outstanding, Shares	187,900
Stock Options Outstanding, Weighted Average Remaining Contractual Term (in years)	5 years 6 months
Stock Options Outstanding, Weighted Average Exercise Price Per Share	$80.16
Stock Options Exercisable, Shares	145,725
Stock Options Exercisable, Weighted Average Exercise Price Per Share	$80.09
$82.64-$82.80
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of per-share exercise prices, Lower Limit	$82.64
Range of per-share exercise prices, Upper Limit	$82.80
Stock Options Outstanding, Shares	197,900
Stock Options Outstanding, Weighted Average Remaining Contractual Term (in years)	7 years 1 month 6 days
Stock Options Outstanding, Weighted Average Exercise Price Per Share	$82.80
Stock Options Exercisable, Shares	84,750
Stock Options Exercisable, Weighted Average Exercise Price Per Share	$82.80
$88.04-$110.76
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of per-share exercise prices, Lower Limit	$88.04
Range of per-share exercise prices, Upper Limit	$110.76
Stock Options Outstanding, Shares	167,667
Stock Options Outstanding, Weighted Average Remaining Contractual Term (in years)	2 years 256 days
Stock Options Outstanding, Weighted Average Exercise Price Per Share	$88.77
Stock Options Exercisable, Shares	166,327
Stock Options Exercisable, Weighted Average Exercise Price Per Share	$88.59

Employee_Stock_Plans_Changes_i1

Employee Stock Plans Changes in Nonvested Restricted Stock Units and Restricted Stock (Details) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Service based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested	$20.10		$14.70
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares, Nonvested Shares at beginning of year	120,008
Weighted Average Grant-Date Fair Value Per Share, Novested shares at beginning of year	$81.83
Weighted Average Remaining Contractual Term (in years), Nonvested beginning of year	1 year 219 days		1 year 219 days
Shares, Granted	88,523
Weighted Average Grant-Date Fair Value Per Share, Granted	$104.44
Weighted Average Grant-Date Fair Value Per Share, Vested	$82.51
Shares, Forfeited	-18,861
Weighted Average Grant-Date Fair Value Per Share, Forfeited	$82.29
Shares, Vested	-23,357
Shares, Nonvested Shares at end of year	166,313		120,008
Weighted Average Grant-Date Fair Value Per Share, Novested shares at end of year	$0		$81.83
Weighted Average Remaining Contractual Term (in years), Nonvested end of year	1 year 219 days		1 year 219 days
Performance based Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Nonvested	$24.60		$17.10
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares, Nonvested Shares at beginning of year	139,418
Weighted Average Grant-Date Fair Value Per Share, Novested shares at beginning of year	$84.22
Weighted Average Remaining Contractual Term (in years), Nonvested beginning of year	2 years 1 month 6 days		2 years 1 month 6 days
Shares, Granted	125,122
Weighted Average Grant-Date Fair Value Per Share, Granted	$90.73
Share based Compensation Arrangement by Share Based Payment Award, Equity Instruments other than Options, adjustment for shares earned against target	7,026	[1]
Weighted Average Grant-Date Fair Value Per Share, Vested	$83.59
Shares, Forfeited	-19,817
Weighted Average Grant-Date Fair Value Per Share, Forfeited	$83.80
Shares, Vested	-48,698
Shares, Nonvested Shares at end of year	203,051	[2]	139,418
Weighted Average Grant-Date Fair Value Per Share, Novested shares at end of year	$88.40		$84.22
Weighted Average Remaining Contractual Term (in years), Nonvested end of year	2 years 1 month 6 days		2 years 1 month 6 days
[1]	Represents share adjustment as a result of final performance against specified performance targets.
[2]	Represents the number of shares expected to be issued based on achievement of grant date performance targets. The actual number of shares issued will depend on the company’s actual performance against specified targets during the performance periods.

Employee_Stock_Plans_Stock_Bas

Employee Stock Plans Stock Based Compensation Expense (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Total stock-based compensation expense recognized	$11.40	$8.70	$10.60

Lease_Commitments_and_Contract2

Lease Commitments and Contractual Obligations Lease Commitments and Contractual Obligations (Details) (USD $)

1 Months Ended

3 Months Ended

12 Months Ended

0 Months Ended

1 Months Ended

Dec. 31, 2013

Dec. 31, 2014

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Jan. 01, 2015

Dec. 31, 2011

31-May-09

Aug. 31, 2008

Jul. 31, 2006

Dec. 31, 2010

Oct. 31, 2004

Feb. 28, 2012

amendment

renewal_option

sqft

sqft

Commitments and Contingencies Disclosure [Line Items]

Operating leases expiration period

10 years

Expiration period of majority leases

5 years

Number of square footage

123,000

123,000

Number of contract renewal options

2

3

Operating leases, renewal option

2 years

5 years

12 months

Rental expenses under operating leases

$28,700,000

$30,100,000

$29,600,000

Total payments over the remaining term of the contract

140,000,000

Building [Member]

Commitments and Contingencies Disclosure [Line Items]

Number of square footage

69,280

69,280

Remaining Lease Term

7 years 6 months

Computer Equipment [Member]

Commitments and Contingencies Disclosure [Line Items]

Operating leases expiration period

3 years

Other Machinery and Equipment [Member]

Commitments and Contingencies Disclosure [Line Items]

Operating leases expiration period

5 years

Acxiom Corporation [Member]

Commitments and Contingencies Disclosure [Line Items]

Service agreement, term

8 months

3 years

3 years

3 years

65 months

4 years

Total payments over the term of the contract

473,000,000

Number of amendments to contract

2

Cost of services

83,000,000

89,000,000

90,000,000

Total payments over the remaining term of the contract

132,000,000

132,000,000

Convergys Customer Management Group [Member]

Commitments and Contingencies Disclosure [Line Items]

Termination Notice Period

180 days

Service agreement, term

5 years

6 years

Cost of services

21,000,000

21,000,000

20,000,000

Total payments over the remaining term of the contract

38,000,000

38,000,000

Years of service before possible termination

3 years

International Business Machines [Member]

Commitments and Contingencies Disclosure [Line Items]

Service agreement, term

7 years

Cost of services

3,000,000

3,000,000

3,000,000

Total payments over the remaining term of the contract

7,000,000

$7,000,000

Maximum [Member] | Acxiom Corporation [Member]

Commitments and Contingencies Disclosure [Line Items]

Service agreement, term

3 years

Lease_Commitments_and_Contract3

Lease Commitments and Contractual Obligations Future Contractual Obligations (Details) (USD $)	Dec. 31, 2014
In Millions, unless otherwise specified
Operating Leases [Member]
Commitments and Contingencies Disclosure [Line Items]
Operating Leases, 2015	$29.40
Operating Leases, 2016	24.5
Operating Leases, 2017	16.2
Operating Leases, 2018	14.1
Operating Leases, 2019	13
Operating Leases, Thereafter	49.4
Operating Leases, Total	146.6
Outsource Contract [Member]
Commitments and Contingencies Disclosure [Line Items]
Obligations to Outsourcers, 2015	135.7
Obligations to Outsourcers, 2016	76.5
Obligations to Outsourcers, 2017	12.7
Obligations to Outsourcers, 2018	2.9
Obligations to Outsourcers, 2019	0
Obligations to Outsourcers, Thereafter	0
Obligations to Outsourcers, Total	$227.80

Contingencies_Additional_Infor

Contingencies- Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended			3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 28, 2012
								person
Commitments and Contingencies Disclosure [Line Items]
Divested and other revenue			$0.10	$1.60	$22
Impairment of Assets	7.3	31.3	7.3	33.3	16.1
Shanghai Roadway D&B Marketing Services Co Ltd
Commitments and Contingencies Disclosure [Line Items]
Divested and other revenue					5.4		22
Divested and other business, operating income (loss)					-14.5		2
Impairment of Assets						12.9
Corporate Shutdown Costs [Member] | Shanghai Roadway D&B Marketing Services Co Ltd
Commitments and Contingencies Disclosure [Line Items]
Shut-down costs			3.7	7.4	13.5
Local Shutdown Costs [Member] | Shanghai Roadway D&B Marketing Services Co Ltd
Commitments and Contingencies Disclosure [Line Items]
Shut-down costs					$2.10
Pending Litigation [Member] | Shanghai Roadway D&B Marketing Services Co Ltd
Commitments and Contingencies Disclosure [Line Items]
Number of current and former employees								5
Fines and Imprisonment [Member] | Shanghai Roadway D&B Marketing Services Co Ltd
Commitments and Contingencies Disclosure [Line Items]
Number of current and former employees								4

Segment_Information_Additional

Segment Information - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2015
	segment				joint_venture		segment
Segment Reporting Disclosure [Line Items]
Corporate Costs Period Increase (Decrease)	$21.10
Depreciation and Amortization of Property, Plant, and Equipment, Compluter Software, and Other Intangibles Period Increase (Decrease)	8.1		7.1
Number of Joint Ventures					2
Payments to Acquire Property, Plant, and Equipment	12.2	[1]	9.5	[1]	7	[1]
Assets	1,986.20	[2]	1,890.30	[2]	1,991.80	[2]
Number of Operating Segments	3
Goodwill	575.2	[3]	589.1	[3]	611.1	[3]
Long-Lived Assets	818.2	[4]	906.3	[4]	983.1	[4]
Corporate Segment [Member]
Segment Reporting Disclosure [Line Items]
Computer Software And Other Intangibles Period Increase (Decrease)			24.6
Operating Segments [Member]
Segment Reporting Disclosure [Line Items]
Payments to Acquire Property, Plant, and Equipment	11.6	[1]	8.8	[1]	6.9	[1]
Assets	1,665.70	[2]	1,660.50	[2]	1,575.70	[2]
Corporate and Other [Member]
Segment Reporting Disclosure [Line Items]
Payments to Acquire Property, Plant, and Equipment	0.6	[1]	0.7	[1]	0.1	[1]
Assets	320.5	[2]	229.8	[2]	416.1	[2]
North America [Member]
Segment Reporting Disclosure [Line Items]
Capital Expenditures Period Increase (Decrease)	3.9
Computer Software And Other Intangibles Period Increase (Decrease)	2.3		-3.8
Goodwill	268.5	[3]	265.1	[3]	266.5	[3]
Long-Lived Assets	400.1	[4]	453.5	[4]	484.3	[4]
North America [Member] | Operating Segments [Member]
Segment Reporting Disclosure [Line Items]
Payments to Acquire Property, Plant, and Equipment	7.6	[1]	3.7	[1]	2.2	[1]
Assets	821.1	[2],[5]	843.2	[2]	795.4	[2]
Asia Pacific [Member]
Segment Reporting Disclosure [Line Items]
Percentage Of Total Revenue From Divested And Other Business			1.00%		11.00%
Goodwill	199.9	[3]	210.2	[3]	234	[3]
Long-Lived Assets	270.5	[4]	290	[4]	333.9	[4]
Asia Pacific [Member] | Operating Segments [Member]
Segment Reporting Disclosure [Line Items]
Payments to Acquire Property, Plant, and Equipment	3.4	[1]	3.2	[1]	4.4	[1]
Assets	355.8	[2]	371.9	[2]	414.6	[2]
Europe And Other International Markets [Member]
Segment Reporting Disclosure [Line Items]
Goodwill	106.8	[2],[3]	113.8	[2],[3]	110.6	[3]
Long-Lived Assets	147.6	[3],[4]	162.8	[3],[4]	164.9	[4]
Europe And Other International Markets [Member] | Operating Segments [Member]
Segment Reporting Disclosure [Line Items]
Payments to Acquire Property, Plant, and Equipment	0.6	[1]	1.9	[1]	0.3	[1]
Assets	$488.80	[2]	$445.40	[2]	$365.70	[2]
Scenario, Forecast [Member]
Segment Reporting Disclosure [Line Items]
Number of Operating Segments							2
Maximum [Member]
Segment Reporting Disclosure [Line Items]
Percentage of total revenue from single customer	10.00%
[1]	The increase of $3.9 million in capital expenditures in the North America segment for the year ended December 31, 2014 as compared to December 31, 2013 was primarily driven by the purchase of computer hardware related to the DNBi infrastructure upgrade.
[2]	The decrease in assets in the North America segment to $821.1 million at December 31, 2014 from $843.2 million at December 31, 2013 was primarily due to normal software amortization and the impairment charge related to the sale of the Parsippany, New Jersey building.The increase in assets in the North America segment to $843.2 million at December 31, 2013 from $795.4 million at December 31, 2012 was primarily due to increases in cash and computer software. The increase in cash was mainly a function of timing, while the increase in computer software was primarily due to the purchase of perpetual licenses of third-party software.The decrease in assets in the Asia Pacific segment to $355.8 million at December 31, 2014 from $371.9 million and $414.6 million at December 31, 2013 and 2012, respectively, was primarily due to the negative impact of foreign currency translation.The increase in assets in the Europe and Other International Markets segment to $488.8 million at December 31, 2014 from $445.4 million and $365.7 million at December 31, 2013 and 2012, respectively, was primarily due to an increase in cash as a result of operational performance in the region.The increase in assets in “Corporate and Other” to $320.5 million at December 31, 2014 from $229.8 million at December 31, 2013 was primarily due to increased deferred tax assets as a result of the remeasurement of our pension plan obligations in the fourth quarter of 2014.The decrease in assets in “Corporate and Other” to $229.8 million at December 31, 2013 from $416.1 million at December 31, 2012 was primarily due to reduced deferred tax assets as a result of the remeasurement of our pension plan obligations in the fourth quarter of 2013 and a reduction in cash.
[3]	Goodwill in the North America segment increased to $268.5 million at December 31, 2014 from $265.1 million at December 31, 2013. The increase was primarily a result of two small acquisitions.Goodwill in the Asia Pacific segment decreased to $199.9 million at December 31, 2014 from $210.2 million and $234.0 million at December 31, 2013 and, 2012, respectively. This decrease was primarily due to the negative impact of foreign currency translation.Goodwill in the Europe and Other International Markets decreased to $106.8 million at December 31, 2014 from $113.8 million at December 31, 2013, primarily due to the negative impact of foreign currency translation.
[4]	Long-lived assets in North America decreased to $400.1 million at December 31, 2014 from $453.5 million at December 31, 2013. This decline was primarily driven by a reduction of a contractual receipt under a tax allocation agreement between Moody’s Corporation and Dun & Bradstreet as it relates to the effective settlement of audits for the 2007 - 2009 tax years and the expiration of a statute of limitations for the 2010 tax year, normal software amortization, and the impairment charge related to the sale of the Parsippany, New Jersey building. In addition, the remaining asset balance for the Parsippany, New Jersey building was reclassified to “Current Asset Held For Sale.” Long-lived assets in North America decreased to $453.5 million at December 31, 2013 from $484.3 million at December 31, 2012. This decrease was due to an impairment charge primarily related to technology and software assets that were primarily related to our data management infrastructure (data supply chain). We can improve data collection through other commercially available means, as needed. Long-lived assets in the Asia Pacific segment decreased to $270.5 million at December 31, 2014 from $290.0 million and $333.9 million at December 31, 2013, and 2012, respectively. This was primarily attributable to the negative impact of foreign currency translation.Long-lived assets in Europe and Other International Markets decreased to $147.6 million at December 31, 2014 from $162.8 million at December 31, 2013, primarily due to the negative impact of foreign currency translation.
[5]	The decrease of $2.3 million in additions to computer software and other intangibles in the North America segment for the year ended December 31, 2014 as compared to December 31, 2013 was mainly due to nonrecurring purchases in the prior year related to MaxCV.The increase of $3.8 million in additions to computer software and other intangibles in the North America segment for the year ended December 31, 2013 as compared to December 31, 2012 was mainly attributed to the purchase of perpetual licenses of third-party software.The decrease of $24.6 million in additions to computer software and other intangibles in “Corporate and Other” for the year ended December 31, 2013 as compared to December 31, 2012 was primarily due to our then non-recurring Strategic Technology Investment or MaxCV related software additions that occurred in the prior year

Segment_Information_Detail

Segment Information (Detail) (USD $)	3 Months Ended										12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013		Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Segment Reporting Disclosure [Line Items]
Revenue	$489.80		$417.10	$393	$381.90	$476.70		$411.10	$386.40	$381	$1,681.80		$1,655.20		$1,663
Divested and Other Businesses											0.1		1.6		22
Operating Income (Loss):	157.4		96.8	85	82.3	134.9		120.5	93.9	87.8	421.5		437.1		432.1
Non-Operating Income (Expense), Net											-72.9		-41.1		-53.8
Income Before Provision for Income Taxes and Equity in Net Income of Affiliates											348.6		396		378.3
Depreciation and Amortization											63.1	[1]	71.2	[1]	78.3	[1]
Capital Expenditures											12.2	[2]	9.5	[2]	7	[2]
Additions to Computer Software and Other Intangibles											41.7	[3]	45.6	[3]	67.4	[3]
Assets	1,986.20	[4]				1,890.30	[4]				1,986.20	[4]	1,890.30	[4]	1,991.80	[4]
Goodwill	575.2	[5]				589.1	[5]				575.2	[5]	589.1	[5]	611.1	[5]
Long-Lived Assets	818.2	[6]				906.3	[6]				818.2	[6]	906.3	[6]	983.1	[6]
Corporate Costs And Other	-22.5		-18.5	-20.8	-18.6	-16.3		-16.6	-14.7	-14.6	-80.4		-62.2		-122.3
North America [Member]
Segment Reporting Disclosure [Line Items]
Revenue	379.9		305.3	284.6	279	366.2		305.8	278.7	283.2	1,248.80		1,233.90		1,225.60
Goodwill	268.5	[5]				265.1	[5]				268.5	[5]	265.1	[5]	266.5	[5]
Long-Lived Assets	400.1	[6]				453.5	[6]				400.1	[6]	453.5	[6]	484.3	[6]
Computer Software And Other Intangibles Period Increase (Decrease)											-2.3		3.8
Asia Pacific [Member]
Segment Reporting Disclosure [Line Items]
Revenue	46.4		47.2	46.4	41.7	44.2		44.4	49.3	41.4	181.7		179.3		195.5
Goodwill	199.9	[5]				210.2	[5]				199.9	[5]	210.2	[5]	234	[5]
Long-Lived Assets	270.5	[6]				290	[6]				270.5	[6]	290	[6]	333.9	[6]
Europe and Other International Markets [Member]
Segment Reporting Disclosure [Line Items]
Revenue	63.5		64.6	62	61.2	66.3		60.9	58.4	56.4	251.3		242		241.9
Goodwill	106.8	[4],[5]				113.8	[4],[5]				106.8	[4],[5]	113.8	[4],[5]	110.6	[5]
Long-Lived Assets	147.6	[5],[6]				162.8	[5],[6]				147.6	[5],[6]	162.8	[5],[6]	164.9	[6]
Total Segments [Member]
Segment Reporting Disclosure [Line Items]
Revenue											1,681.70		1,653.60		1,641
Operating Income (Loss):											501.9		499.3		554.4
Depreciation and Amortization											60.3	[1]	68.2	[1]	72	[1]
Capital Expenditures											11.6	[2]	8.8	[2]	6.9	[2]
Additions to Computer Software and Other Intangibles											33.6	[3]	36.1	[3]	33.3	[3]
Assets	1,665.70	[4]				1,660.50	[4]				1,665.70	[4]	1,660.50	[4]	1,575.70	[4]
Total Segments [Member] | North America [Member]
Segment Reporting Disclosure [Line Items]
Revenue											1,248.80		1,233.90		1,225.60
Operating Income (Loss):											397.8		407.4		480.9
Depreciation and Amortization											34.8	[1]	41.6	[1]	41.8	[1]
Capital Expenditures											7.6	[2]	3.7	[2]	2.2	[2]
Additions to Computer Software and Other Intangibles											22.7	[3]	25	[3]	21.2	[3]
Assets	821.1	[3],[4]				843.2	[4]				821.1	[3],[4]	843.2	[4]	795.4	[4]
Total Segments [Member] | Asia Pacific [Member]
Segment Reporting Disclosure [Line Items]
Revenue											181.7		178.3		174.2
Operating Income (Loss):											28.8		19		4.7
Depreciation and Amortization											13.3	[1]	14.4	[1]	17.2	[1]
Capital Expenditures											3.4	[2]	3.2	[2]	4.4	[2]
Additions to Computer Software and Other Intangibles											5.3	[3]	4.4	[3]	5.4	[3]
Assets	355.8	[4]				371.9	[4]				355.8	[4]	371.9	[4]	414.6	[4]
Total Segments [Member] | Europe and Other International Markets [Member]
Segment Reporting Disclosure [Line Items]
Revenue											251.2		241.4		241.2
Operating Income (Loss):											75.3		72.9		68.8
Depreciation and Amortization											12.2	[1]	12.2	[1]	13	[1]
Capital Expenditures											0.6	[2]	1.9	[2]	0.3	[2]
Additions to Computer Software and Other Intangibles											5.6	[3]	6.7	[3]	6.7	[3]
Assets	488.8	[4]				445.4	[4]				488.8	[4]	445.4	[4]	365.7	[4]
Corporate and Other [Member]
Segment Reporting Disclosure [Line Items]
Operating Income (Loss):											-80.4	[7]	-62.2	[7]	-122.3	[7]
Depreciation and Amortization											2.8	[1]	3	[1]	6.3	[1]
Capital Expenditures											0.6	[2]	0.7	[2]	0.1	[2]
Additions to Computer Software and Other Intangibles											8.1	[3]	9.5	[3]	34.1	[3]
Assets	320.5	[4]				229.8	[4]				320.5	[4]	229.8	[4]	416.1	[4]
Corporate Costs [Member]
Segment Reporting Disclosure [Line Items]
Corporate Costs And Other	-18.7		-15.3	-14.6	-13.4	-11.8		-9.6	-8.8	-10.7	-62	[8]	-40.9	[8]	-49.1	[8]
Computer Software And Other Intangibles Period Increase (Decrease)													-24.6
Restructuring accruals [Member]
Segment Reporting Disclosure [Line Items]
Corporate Costs And Other	-3		-2	-5	-4.9	-3.3		-6.1	-2.2	-2.3	-14.9		-13.9		-29.4
Strategic Technology Investment (MaxCV) [Member]
Segment Reporting Disclosure [Line Items]
Corporate Costs And Other											0		0		-30.3
Legal Fees And Other Shut-Down Costs Associated with Matters in China [Member]
Segment Reporting Disclosure [Line Items]
Corporate Costs And Other	($0.80)		($1.20)	($1.20)	($0.30)	($1.20)		($0.90)	($3.70)	($1.60)	($3.50)		($7.40)		($13.50)
[1]	Includes depreciation and amortization of Property, Plant and Equipment, Computer Software and Other Intangibles. The decrease of $8.1 million for the year ended December 31, 2014 as compared to December 31, 2013 was primarily attributed to lower software amortization in 2014 in the North America segment as a result of the impairment of technology software assets in the fourth quarter of 2013 related to our data management infrastructure (data supply chain).The decrease of $7.1 million for the year ended December 31, 2013 as compared to December 31, 2012 was primarily attributed to software assets that became fully depreciated in 2012 and the divestiture of the domestic portion of our Japanese operations to TSR Ltd.
[2]	The increase of $3.9 million in capital expenditures in the North America segment for the year ended December 31, 2014 as compared to December 31, 2013 was primarily driven by the purchase of computer hardware related to the DNBi infrastructure upgrade.
[3]	The decrease of $2.3 million in additions to computer software and other intangibles in the North America segment for the year ended December 31, 2014 as compared to December 31, 2013 was mainly due to nonrecurring purchases in the prior year related to MaxCV.The increase of $3.8 million in additions to computer software and other intangibles in the North America segment for the year ended December 31, 2013 as compared to December 31, 2012 was mainly attributed to the purchase of perpetual licenses of third-party software.The decrease of $24.6 million in additions to computer software and other intangibles in “Corporate and Other” for the year ended December 31, 2013 as compared to December 31, 2012 was primarily due to our then non-recurring Strategic Technology Investment or MaxCV related software additions that occurred in the prior year
[4]	The decrease in assets in the North America segment to $821.1 million at December 31, 2014 from $843.2 million at December 31, 2013 was primarily due to normal software amortization and the impairment charge related to the sale of the Parsippany, New Jersey building.The increase in assets in the North America segment to $843.2 million at December 31, 2013 from $795.4 million at December 31, 2012 was primarily due to increases in cash and computer software. The increase in cash was mainly a function of timing, while the increase in computer software was primarily due to the purchase of perpetual licenses of third-party software.The decrease in assets in the Asia Pacific segment to $355.8 million at December 31, 2014 from $371.9 million and $414.6 million at December 31, 2013 and 2012, respectively, was primarily due to the negative impact of foreign currency translation.The increase in assets in the Europe and Other International Markets segment to $488.8 million at December 31, 2014 from $445.4 million and $365.7 million at December 31, 2013 and 2012, respectively, was primarily due to an increase in cash as a result of operational performance in the region.The increase in assets in “Corporate and Other” to $320.5 million at December 31, 2014 from $229.8 million at December 31, 2013 was primarily due to increased deferred tax assets as a result of the remeasurement of our pension plan obligations in the fourth quarter of 2014.The decrease in assets in “Corporate and Other” to $229.8 million at December 31, 2013 from $416.1 million at December 31, 2012 was primarily due to reduced deferred tax assets as a result of the remeasurement of our pension plan obligations in the fourth quarter of 2013 and a reduction in cash.
[5]	Goodwill in the North America segment increased to $268.5 million at December 31, 2014 from $265.1 million at December 31, 2013. The increase was primarily a result of two small acquisitions.Goodwill in the Asia Pacific segment decreased to $199.9 million at December 31, 2014 from $210.2 million and $234.0 million at December 31, 2013 and, 2012, respectively. This decrease was primarily due to the negative impact of foreign currency translation.Goodwill in the Europe and Other International Markets decreased to $106.8 million at December 31, 2014 from $113.8 million at December 31, 2013, primarily due to the negative impact of foreign currency translation.
[6]	Long-lived assets in North America decreased to $400.1 million at December 31, 2014 from $453.5 million at December 31, 2013. This decline was primarily driven by a reduction of a contractual receipt under a tax allocation agreement between Moody’s Corporation and Dun & Bradstreet as it relates to the effective settlement of audits for the 2007 - 2009 tax years and the expiration of a statute of limitations for the 2010 tax year, normal software amortization, and the impairment charge related to the sale of the Parsippany, New Jersey building. In addition, the remaining asset balance for the Parsippany, New Jersey building was reclassified to “Current Asset Held For Sale.” Long-lived assets in North America decreased to $453.5 million at December 31, 2013 from $484.3 million at December 31, 2012. This decrease was due to an impairment charge primarily related to technology and software assets that were primarily related to our data management infrastructure (data supply chain). We can improve data collection through other commercially available means, as needed. Long-lived assets in the Asia Pacific segment decreased to $270.5 million at December 31, 2014 from $290.0 million and $333.9 million at December 31, 2013, and 2012, respectively. This was primarily attributable to the negative impact of foreign currency translation.Long-lived assets in Europe and Other International Markets decreased to $147.6 million at December 31, 2014 from $162.8 million at December 31, 2013, primarily due to the negative impact of foreign currency translation.
[7]	The following table summarizes “Corporate and Other:” For the Years Ended December 31, 2014 2013 2012Corporate Costs (a)$(62.0) $(40.9) $(49.1)Restructuring Expense(14.9) (13.9) (29.4)Strategic Technology Investment or MaxCV— — (30.3)Legal Fees and Other Shut-Down Costs Associated with Matters in China(3.5) (7.4) (13.5)Total Corporate and Other$(80.4) $(62.2) $(122.3)(a) The increase of $21.1 million in Corporate Costs for the year ended December 31, 2014 as compared to December 31, 2013 was primarily due to higher compensation and professional costs in 2014 associated with our strategic activities.
[8]	The increase of $21.1 million in Corporate Costs for the year ended December 31, 2014 as compared to December 31, 2013 was primarily due to higher compensation and professional costs in 2014 associated with our strategic activities.

Segment_Information_Supplement

Segment Information Supplemental Geographic and Customer Solution Set Information (Detail) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
													joint_venture
Segment Reporting Disclosure [Line Items]
Revenue	$489.80	$417.10	$393	$381.90	$476.70	$411.10	$386.40	$381	$1,681.80		$1,655.20		$1,663
Divested and Other Businesses									0.1		1.6		22
Number of Joint Ventures													2
Risk Management Solutions [Member]
Segment Reporting Disclosure [Line Items]
Divested and Other Businesses									0.1		0.6		10
Sales and Marketing Solutions [Member]
Segment Reporting Disclosure [Line Items]
Divested and Other Businesses									0		1		12
Segment, Continuing Operations
Segment Reporting Disclosure [Line Items]
Revenue									1,681.70		1,653.60		1,641
Divested and Other Businesses									0.1	[1]	1.6	[1]	22	[1]
Segment, Continuing Operations | Risk Management Solutions [Member]
Segment Reporting Disclosure [Line Items]
Revenue									1,054.80		1,045.40		1,046.90
Segment, Continuing Operations | Sales and Marketing Solutions [Member]
Segment Reporting Disclosure [Line Items]
Revenue									626.9		608.2		594.1
North America [Member]
Segment Reporting Disclosure [Line Items]
Revenue	379.9	305.3	284.6	279	366.2	305.8	278.7	283.2	1,248.80		1,233.90		1,225.60
North America [Member] | Segment, Continuing Operations
Segment Reporting Disclosure [Line Items]
Revenue									1,248.80		1,233.90		1,225.60
Divested and Other Businesses									0	[1]	0	[1]	0	[1]
North America [Member] | Segment, Continuing Operations | Risk Management Solutions [Member]
Segment Reporting Disclosure [Line Items]
Revenue									691.7		693.2		700.6
North America [Member] | Segment, Continuing Operations | Sales and Marketing Solutions [Member]
Segment Reporting Disclosure [Line Items]
Revenue									557.1		540.7		525
Asia Pacific [Member]
Segment Reporting Disclosure [Line Items]
Revenue	46.4	47.2	46.4	41.7	44.2	44.4	49.3	41.4	181.7		179.3		195.5
Percentage of Revenue from Divested and Other Businesses											1.00%		11.00%
Asia Pacific [Member] | Segment, Continuing Operations
Segment Reporting Disclosure [Line Items]
Revenue									181.7		178.3		174.2
Divested and Other Businesses									0	[1]	1	[1]	21.3	[1]
Asia Pacific [Member] | Segment, Continuing Operations | Risk Management Solutions [Member]
Segment Reporting Disclosure [Line Items]
Revenue									158.9		154.5		147.5
Asia Pacific [Member] | Segment, Continuing Operations | Sales and Marketing Solutions [Member]
Segment Reporting Disclosure [Line Items]
Revenue									22.8		23.8		26.7
Europe and Other International Markets [Member]
Segment Reporting Disclosure [Line Items]
Revenue	63.5	64.6	62	61.2	66.3	60.9	58.4	56.4	251.3		242		241.9
Europe and Other International Markets [Member] | Segment, Continuing Operations
Segment Reporting Disclosure [Line Items]
Revenue									251.2		241.4		241.2
Divested and Other Businesses									0.1	[1]	0.6	[1]	0.7	[1]
Europe and Other International Markets [Member] | Segment, Continuing Operations | Risk Management Solutions [Member]
Segment Reporting Disclosure [Line Items]
Revenue									204.2		197.7		198.8
Europe and Other International Markets [Member] | Segment, Continuing Operations | Sales and Marketing Solutions [Member]
Segment Reporting Disclosure [Line Items]
Revenue									$47		$43.70		$42.40
[1]	During the year ended December 31, 2014, we ceased the operations of our small Ireland Corporation Registry Business. This business has been classified as “Divested and Other Businesses.” During the year ended December 31, 2013, we ceased the operations of our India Event Planning and Rural Marketing Businesses. During the year ended December 31, 2012, we completed (a) the sale of: (i) the domestic portion of our Japanese operations to TSR Ltd.; (ii) our market research business in China, consisting of two joint venture companies; and (iii) a research and advisory services business in India; and (b) the shut-down of our Roadway operations. These businesses have been classified as “Divested and Other Businesses.” These Divested and Other Businesses contributed less than 1% and 11% to our Asia Pacific total revenue for the years ended December 31, 2013 and 2012, respectively.During the year ended December 31, 2012, we completed the sale of: (i) AllBusiness.com, Inc.; (ii) Purisma Incorporated; and (iii) a small supply management company. These businesses have been classified as “Divested and Other Businesses.” The following table represents Divested and Other Businesses revenue by solution set: For the Years Ended December 31, 2014 2013 2012Divested and Other Businesses: Risk Management Solutions$0.1 $0.6 $10.0Sales & Marketing Solutions— 1.0 12.0Total Divested and Other Businesses Revenue$0.1 $1.6 $22.0

Segment_Information_Schedule_o

Segment Information Schedule of Divested and Other Business Revenue (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
Divested and other revenue	$0.10	$1.60	$22
Risk Management Solutions [Member]
Segment Reporting Information [Line Items]
Divested and other revenue	0.1	0.6	10
Sales and Marketing Solutions [Member]
Segment Reporting Information [Line Items]
Divested and other revenue	$0	$1	$12

Supplemental_Financial_Data_Ot

Supplemental Financial Data - Other Accrued and Current Liabilities (Detail) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
In Millions, unless otherwise specified
Schedule of Accrued Liabilities [Line Items]
Restructuring Reserve	$9.90	$10.40	$11.70	$10.50
Accrued Professional Fees, Current	31.4	34.6
Accrued Operating Expenses, Current	43.2	39
Other Accrued Liabilities, Current	29.7	32.1
Other Accrued and Current Liabilities	$114.20	$116.10

Supplemental_Financial_Data_Pr

Supplemental Financial Data - Property, Plant and Equipment at Cost - Net (Details) (USD $)	Dec. 31, 2014		Dec. 31, 2013
In Millions, unless otherwise specified
Property, Plant and Equipment [Line Items]
Accumulated Depreciation and Amortization	$82.70		$83.90
Property, Plant and Equipment, Net	27.4	[1]	39.6	[1]
Property, Plant and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	85.6		98.7
Accumulated Depreciation and Amortization	66.2		68.3
Property, Plant and Equipment, Net	19.4		30.4
Land [Member] | Property, Plant and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	1.1		5.7
Building [Member] | Property, Plant and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	23.7		33.5
Furniture and Fixtures [Member] | Property, Plant and Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	60.8		59.5
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Accumulated Depreciation and Amortization	16.5		15.6
Property, Plant and Equipment, Net	$8		$9.20
[1]	The decrease in Property, Plant and Equipment – Net is primarily due to reclassification to "Current Assets Held for Sale" for the Parsippany, New Jersey building. See Note 1 and Note 7 to our consolidated financial statements included in this Annual Report on Form 10-K for further detail.

Supplemental_Financial_Data_Ot1

Supplemental Financial Data - Other Income (Expense) - Net (Details) (USD $)	12 Months Ended						1 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2012	Jan. 30, 2012
					joint_venture			joint_venture
Redemption Premium					$5.80
Number of Joint Ventures					2		2
Effect of Legacy Tax Matters	-28.6	[1]	0.8	[1]	-14.8	[1]
Other Income (Expense) – Net	-31.3		-1.7		-15.1
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax	0	[2]	0	[2]	6.1	[2]
Other Nonoperating Expense	-2.7	[3]	-2.5	[3]	-6.4	[3]
Chinese Market Research Joint Venture [Member]
Number of Joint Ventures								2
Senior Notes Due Twenty Thirteen [Member]
Repayments of Notes Payable					400		400
Face value					$400		$400
[1]	During the year ended December 31, 2014, we recognized the reduction of a contractual receipt under a tax allocation agreement between Moody's Corporation and Dun & Bradstreet as it relates to the effective settlement of audits for the 2007 - 2009 tax years and the expiration of a statute of limitations for the 2010 tax year. During the year ended December 31, 2012, we recognized the reduction of a contractual receipt under a tax allocation agreement between Moody's Corporation and Dun & Bradstreet as it relates to the expiration of the statute of limitations for the tax years 2005 and 2006.
[2]	During the year ended December 31, 2012, we recognized gains primarily related to the sale of: (i) the domestic portion of our Japanese operations to TSR Ltd.; (ii) Purisma Incorporated; and (iii) our market research business in China, consisting of two joint venture companies.
[3]	Miscellaneous Other Income (Expense) - Net decreased for the year ended December 31, 2013 compared to the year ended December 31, 2012, primarily due to one-time costs of $5.8 million incurred in 2012 to accelerate the redemption of our senior notes with a face value of $400 million that were scheduled to mature on April 1, 2013, partially offset by the negative impact of foreign currency translation.

Supplemental_Financial_Data_Co

Supplemental Financial Data - Computer Software and Goodwill (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013		Jan. 30, 2012
Supplemental Financial Information [Abstract]
Number Of Acquisitions					2
Goodwill and Other Intangible Assets [Roll Forward]
Computer Software, Beginning Balance	$107.90		$140.90
Goodwill, Beginning Balance	589.1	[1]	611.1	[1]
Computer Software, Additions at cost	39.6	[2]	43.5	[3]
Goodwill, Acquired During Period	7.3	[2]
Computer Software, Amortization	-39.7		-46.9
Computer Software, Write-offs	-1.2		-31.3	[4]
Goodwill, Write-offs	0
Computer Software, Other	-2.9	[5]	1.7	[5]
Goodwill, Other	-21.2	[5]	-22	[5]
Computer Software, Ending Balance	103.7		107.9
Goodwill, Ending Balance	$575.20	[1]	$589.10	[1]
[1]	Goodwill in the North America segment increased to $268.5 million at December 31, 2014 from $265.1 million at December 31, 2013. The increase was primarily a result of two small acquisitions.Goodwill in the Asia Pacific segment decreased to $199.9 million at December 31, 2014 from $210.2 million and $234.0 million at December 31, 2013 and, 2012, respectively. This decrease was primarily due to the negative impact of foreign currency translation.Goodwill in the Europe and Other International Markets decreased to $106.8 million at December 31, 2014 from $113.8 million at December 31, 2013, primarily due to the negative impact of foreign currency translation.
[2]	Computer Software and Goodwill: Computer Software - Primarily due to software related enhancements on Dun & Bradstreet products and the purchase of third party licenses. Goodwill - Related to two immaterial acquisitions.
[3]	Computer Software - Amount mainly due to the purchase of perpetual licenses of third party software.
[4]	Computer Software - This decrease is due to impairment charges primarily related to (i) technology and software assets that were primarily related to our data management infrastructure (data supply chain) in our North America segment. We can improve data collection through other commercially available means, as needed; and (ii) our China Trade Portal (“Portal”) asset in our Asia Pacific segment resulting from lower than expected product revenue. We decided to sunset the Portal product and migrate our existing Portal customers to an enhanced version of our existing DUNS Registered Seal product.
[5]	Computer Software and Goodwill - Primarily due to the impact of foreign currency fluctuations.

Supplemental_Financial_Data_Ot2

Supplemental Financial Data - Other Intangibles (included in Non-Current Assets) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Schedule of Intangible Assets by Major Class [Line Items]
Intangible Assets Net Excluding Goodwill Acquisitions	$1.30
Finite-lived Intangible Assets [Roll Forward]
Other Intangibles, Beginning Balance	76.7	[1]	99.3
Additions	1.1		0.6
Amortization	-15.1		-15.8
Write-offs			-0.4
Other	-2.4		-7	[2]
Other Intangibles, Ending Balance	61.6	[1]	76.7	[1]
Customer Relationships [Member]
Schedule of Intangible Assets by Major Class [Line Items]
Intangible Assets Net Excluding Goodwill Acquisitions	0.8
Finite-lived Intangible Assets [Roll Forward]
Other Intangibles, Beginning Balance	31	[1]	29.6
Additions	0		0
Amortization	-4		-4.1
Write-offs			0
Other	-1.1		5.5	[2]
Other Intangibles, Ending Balance	26.7	[1]	31	[1]
Other intangibles accumulated amortization	17.1		13.8
Patents and Other Intangible Assets [Member]
Schedule of Intangible Assets by Major Class [Line Items]
Intangible Assets Net Excluding Goodwill Acquisitions	0.5
Finite-lived Intangible Assets [Roll Forward]
Other Intangibles, Beginning Balance	45.7	[1]	69.7
Additions	1.1		0.6
Amortization	-11.1		-11.7
Write-offs			-0.4
Other	-1.3		-12.5	[2]
Other Intangibles, Ending Balance	34.9	[1]	45.7	[1]
Other intangibles accumulated amortization	$86.90		$78.20
[1]	Customer Relationships - Includes accumulated amortization of $17.1 million and $13.8 million as of December 31, 2014 and 2013, respectively. Trademark and Other - Includes accumulated amortization of $86.9 million and $78.2 million as of December 31, 2014 and 2013, respectively.
[2]	During the year ended December 31, 2013 we reclassified assets between Trademark and Other and Customer Relationships. In addition, the amount includes the negative impact of foreign currency translation.

Supplemental_Financial_Data_Al

Supplemental Financial Data - Allowance for Doubtful Accounts (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Allowance for Doubtful Accounts Receivable [Roll Forward]
Allowance for Doubtful Accounts, Beginning Balance	$23.90	$27.30	$17.10
Provision for Doubtful Accounts	1.8	3	15.2
Allowance for Doubtful Accounts Receivable, Write-offs	6	9.7	7.2
Allowance for Doubtful Accounts Receivable, Recoveries	1.5	3.2	2.1
Other	-0.2	0.1	0.1
Allowance for Doubtful Accounts, Ending Balance	$21	$23.90	$27.30

Supplemental_Financial_Data_De

Supplemental Financial Data - Deferred Tax Asset Valuation Allowance (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Movement in Valuation Allowances and Reserves [Roll Forward]
Deferred Tax Asset Valuation Allowance, Beginning Balance	$36.90	$38.30	$35.40	$38.10
Additions charged (credited) to costs and expenses	1.9	2.7	-1.6
Additions charged (credited) due to foreign currency fluctuations	-2.6	1.2	0
Additions charged (credited) to other accounts	-0.7	-1	-1.1
Deferred Tax Asset Valuation Allowance, Ending Balance	$36.90	$38.30	$35.40	$38.10

Quarterly_Financial_Informatio2

Quarterly Financial Information Quarterly Financial Information (Details) (USD $)	3 Months Ended																12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Quarterly Financial Information [Line Items]
Revenue	$489.80		$417.10		$393		$381.90		$476.70		$411.10		$386.40		$381		$1,681.80		$1,655.20		$1,663
Operating Income (Loss):	157.4		96.8		85		82.3		134.9		120.5		93.9		87.8		421.5		437.1		432.1
Net Income	92.6		68.4		50.9		86		76.6		73.5		58.4		53.6		297.9		262.1		296.5
Less: Net (Income) Loss Attributable to the Noncontrolling Interest	-0.9		-0.9		-1		-0.7		-1.3		-0.7		-0.9		-0.7		-3.5		-3.6		-1
Net Income Attributable to D&B	91.7		67.5		49.9		85.3		75.3		72.8		57.5		52.9		294.4		258.5		295.5
Basic Earnings Per Share of Common Stock Attributable to D&B Common Shareholders (in dollars per share)	$2.55	[1]	$1.87	[1]	$1.36	[1]	$2.28	[1]	$1.98	[1]	$1.89	[1]	$1.46	[1]	$1.30	[1]	$8.06	[1]	$6.61	[1]	$6.47
Diluted Earnings Per Share of Common Stock Attributable to D&B Common Shareholders (in dollars per share)	$2.53	[1]	$1.85	[1]	$1.35	[1]	$2.26	[1]	$1.96	[1]	$1.87	[1]	$1.44	[1]	$1.29	[1]	$7.99	[1]	$6.54	[1]	$6.43
Corporate Costs And Other	-22.5		-18.5		-20.8		-18.6		-16.3		-16.6		-14.7		-14.6		-80.4		-62.2		-122.3
Cash Dividend Paid Per Common Share (in dollars per share)	$0.44		$0.44		$0.44		$0.44		$0.40		$0.40		$0.40		$0.40		$1.76		$1.60		$1.52
North America [Member]
Quarterly Financial Information [Line Items]
Revenue	379.9		305.3		284.6		279		366.2		305.8		278.7		283.2		1,248.80		1,233.90		1,225.60
Asia Pacific [Member]
Quarterly Financial Information [Line Items]
Revenue	46.4		47.2		46.4		41.7		44.2		44.4		49.3		41.4		181.7		179.3		195.5
Europe and Other International Markets [Member]
Quarterly Financial Information [Line Items]
Revenue	63.5		64.6		62		61.2		66.3		60.9		58.4		56.4		251.3		242		241.9
Operating Segments [Member]
Quarterly Financial Information [Line Items]
Operating Income (Loss):	179.9		115.3		105.8		100.9		151.2		137.1		108.6		102.4		501.9		499.3
Operating Segments [Member] | North America [Member]
Quarterly Financial Information [Line Items]
Operating Income (Loss):	151.7		88.2		79.9		78		124.6		112.3		84.5		86		397.8		407.4
Operating Segments [Member] | Asia Pacific [Member]
Quarterly Financial Information [Line Items]
Operating Income (Loss):	7.2		7.7		7.7		6.2		3.1		5.1		8.4		2.4		28.8		19
Operating Segments [Member] | Europe and Other International Markets [Member]
Quarterly Financial Information [Line Items]
Operating Income (Loss):	21		19.4		18.2		16.7		23.5		19.7		15.7		14		75.3		72.9
Corporate and Other [Member]
Quarterly Financial Information [Line Items]
Operating Income (Loss):	-22.5	[2]	-18.5	[2]	-20.8	[2]	-18.6	[2]	-16.3	[2]	-16.6	[2]	-14.7	[2]	-14.6	[2]	-80.4	[2]	-62.2	[2]
Corporate Costs [Member]
Quarterly Financial Information [Line Items]
Corporate Costs And Other	-18.7		-15.3		-14.6		-13.4		-11.8		-9.6		-8.8		-10.7		-62	[3]	-40.9	[3]	-49.1	[3]
Restructuring Expense [Member]
Quarterly Financial Information [Line Items]
Corporate Costs And Other	-3		-2		-5		-4.9		-3.3		-6.1		-2.2		-2.3		-14.9		-13.9		-29.4
Legal Fees And Other Shut-Down Costs Associated with Matters in China [Member]
Quarterly Financial Information [Line Items]
Corporate Costs And Other	($0.80)		($1.20)		($1.20)		($0.30)		($1.20)		($0.90)		($3.70)		($1.60)		($3.50)		($7.40)		($13.50)
[1]	The number of weighted average shares outstanding changes as common shares are issued for employee benefit plans and other purposes or as shares are repurchased. For this reason, the sum of quarterly earnings per share may not be the same as earnings per share for the year.
[2]	The following table itemizes the components of the “Corporate and Other” category of Operating Income (Loss): For the Three Months Ended March 31, June 30, September 30, December 31, Full Year2014 Corporate Costs$(13.4) $(14.6) $(15.3) (18.7) $(62.0)Restructuring Expense(4.9) (5.0) (2.0) (3.0) (14.9)Legal and Other Professional Fees and Shut-Down Costs Related to Matters in China(0.3) (1.2) (1.2) (0.8) (3.5)Total Corporate and Other$(18.6) $(20.8) $(18.5) $(22.5) $(80.4) For the Three Months Ended March 31, June 30, September 30, December 31, Full Year2013 Corporate Costs$(10.7) $(8.8) $(9.6) $(11.8) $(40.9)Restructuring Expense(2.3) (2.2) (6.1) (3.3) (13.9)Legal and Other Professional Fees and Shut-Down Costs Related to Matters in China(1.6) (3.7) (0.9) (1.2) (7.4)Total Corporate and Other$(14.6) $(14.7) $(16.6) $(16.3) $(62.2)
[3]	The increase of $21.1 million in Corporate Costs for the year ended December 31, 2014 as compared to December 31, 2013 was primarily due to higher compensation and professional costs in 2014 associated with our strategic activities.

Divestitures_and_Other_Busines1

Divestitures and Other Businesses - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended			1 Months Ended	12 Months Ended	3 Months Ended	1 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011	Mar. 31, 2012	Feb. 28, 2012	Jan. 30, 2012	Sep. 28, 2012
					joint_venture					joint_venture	person
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Divested and other revenue			$100,000	$1,600,000	$22,000,000
Impairment of Assets	7,300,000	31,300,000	7,300,000	33,300,000	16,100,000
Commercial arrangement with TSR to provide global data to its Japanese customers, term			1 year
Commercial arrangement with TSR to provide global data to its Japanese customers, aggregate future cash payments									140,000,000
Number of joint venture companies sold					2
Indian Research and Advisory Services [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceed from divestiture of business						500,000
Pre-tax gain (loss) from sale of business					-200,000
Divested and other revenue							1,300,000
Shanghai Roadway D&B Marketing Services Co Ltd
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Divested and other revenue					5,400,000		22,000,000
Divested and other business, operating income (loss)					-14,500,000		2,000,000
Impairment of Assets								12,900,000
Japanese Joint Venture Domestic
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceed from divestiture of business									4,500,000
Pre-tax gain (loss) from sale of business					-3,000,000
Divested and other revenue							64,000,000
Commercial arrangement with TSR to provide global data to its Japanese customers, term									10 years
All Business Inc [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceed from divestiture of business									400,000
Pre-tax gain (loss) from sale of business					400,000
Divested and other revenue							4,000,000
Chinese Market Research Joint Venture
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceed from divestiture of business										5,000,000
Pre-tax gain (loss) from sale of business					-1,400,000
Divested and other revenue							16,000,000
Number of joint venture companies sold										2
Purisma [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceed from divestiture of business										2,000,000
Pre-tax gain (loss) from sale of business					-2,000,000
Divested and other revenue							4,000,000
Corporate Shutdown Costs [Member] | Shanghai Roadway D&B Marketing Services Co Ltd
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Shut-down costs related to the Roadway business			3,700,000	7,400,000	13,500,000
Local Shutdown Costs [Member] | Shanghai Roadway D&B Marketing Services Co Ltd
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Shut-down costs related to the Roadway business					$2,100,000
Pending Litigation [Member] | Shanghai Roadway D&B Marketing Services Co Ltd
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of current and former employees											5
Fines and Imprisonment [Member] | Shanghai Roadway D&B Marketing Services Co Ltd
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of current and former employees											4

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (USD $)	12 Months Ended			0 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jan. 05, 2015
Subsequent Event [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	$8.30	$0	$0
Subsequent Event [Member]
Subsequent Event [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired				$125