Acquisitions (Details)	12 Months Ended			1 Months Ended	12 Months Ended	1 Months Ended	12 Months Ended	1 Months Ended		12 Months Ended	1 Months Ended	12 Months Ended	1 Months Ended	12 Months Ended	1 Months Ended		12 Months Ended	1 Months Ended	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Sep. 30, 2014 Consilience Software, Inc. [Member] USD ($)	Dec. 31, 2014 Consilience Software, Inc. [Member] USD ($)	May 31, 2014 ISG Holdings, Inc. [Member] USD ($)	Dec. 31, 2014 ISG Holdings, Inc. [Member] USD ($)	Jan. 31, 2014 Invoco Holding GmbH [Member] USD ($)	Jan. 31, 2014 Invoco Holding GmbH [Member] EUR (€)	Dec. 31, 2014 Invoco Holding GmbH [Member] USD ($)	Apr. 30, 2013 Zeno Office Solutions, Inc. [Member] USD ($)	Dec. 31, 2013 Zeno Office Solutions, Inc. [Member] USD ($)	Feb. 28, 2013 Impika [Member] USD ($)	Dec. 31, 2013 Impika [Member] USD ($)	Jul. 31, 2012 WDS [Member] USD ($)	Jul. 31, 2012 WDS [Member] GBP (£)	Dec. 31, 2012 WDS [Member] USD ($)	Feb. 29, 2012 R.K. Dixon [Member] USD ($)	Dec. 31, 2012 R.K. Dixon [Member] USD ($)	Dec. 31, 2014 Prior year acquisitions [Member] USD ($)	Dec. 31, 2013 Prior year acquisitions [Member] USD ($)	Dec. 31, 2014 Acquisitions made current year minus two years [Member] USD ($)	Dec. 31, 2013 Acquisitions made current year minus two years [Member] USD ($)	Dec. 31, 2012 Acquisitions made current year minus two years [Member] USD ($)	Dec. 31, 2014 Document Technology [Member] Series of Individually Immaterial Business Acquisitions [Member] USD ($) businesses	Dec. 31, 2013 Document Technology [Member] Series of Individually Immaterial Business Acquisitions [Member] USD ($) businesses	Dec. 31, 2012 Document Technology [Member] Series of Individually Immaterial Business Acquisitions [Member] USD ($) businesses	Dec. 31, 2014 Services Segment [Member] Consilience Software, Inc. [Member] USD ($)	Dec. 31, 2014 Services Segment [Member] ISG Holdings, Inc. [Member] USD ($)	Dec. 31, 2014 Services Segment [Member] Invoco Holding GmbH [Member] USD ($)	Dec. 31, 2013 Services Segment [Member] Zeno Office Solutions, Inc. [Member] USD ($)	Dec. 31, 2013 Services Segment [Member] Impika [Member] USD ($)	Dec. 31, 2012 Services Segment [Member] WDS [Member] USD ($)	Dec. 31, 2012 Services Segment [Member] R.K. Dixon [Member] USD ($)	Dec. 31, 2014 Services Segment [Member] Series of Individually Immaterial Business Acquisitions [Member] USD ($) businesses	Dec. 31, 2013 Services Segment [Member] Series of Individually Immaterial Business Acquisitions [Member] USD ($)	Dec. 31, 2012 Services Segment [Member] Series of Individually Immaterial Business Acquisitions [Member] USD ($)	Dec. 31, 2014 Customer relationships [Member] USD ($)	Dec. 31, 2014 Trademarks [Member] USD ($)	Dec. 31, 2014 Non-compete agreements [Member] USD ($)	Dec. 31, 2014 Software [Member] USD ($)
Schedule of Business Acquisitions, by Acquisition [Line Items]
Date of acquisition				Sep. 30, 2014		May 31, 2014		Jan. 31, 2014	Jan. 31, 2014		Apr. 01, 2013		Feb. 28, 2013		Jul. 31, 2012	Jul. 31, 2012		Feb. 28, 2012
Payments to Acquire Businesses, Net of Cash Acquired	$ 340,000,000	$ 155,000,000	$ 276,000,000	$ 25,000,000		$ 225,000,000		$ 54,000,000	€ 40,000,000		$ 59,000,000		$ 53,000,000		$ 95,000,000	£ 60,000,000		$ 58,000,000							$ 34,000,000	$ 12,000,000	$ 62,000,000								$ 2,000,000	$ 31,000,000	$ 61,000,000
Number of Businesses Acquired (in businesses)																									2	1	3								1	3	4
Revenue of Acquiree since Acquisition Date, Actual	132,000,000																			84,000,000	56,000,000	275,000,000	277,000,000	162,000,000
Goodwill, Expected Tax Deductible Amount	0.50
Weighted Average Useful Life (Years) Acquired Finite-lived Intangible Asset																																						13 years	11 years	4 years	7 years
Accounts/finance receivables	33,000,000
Intangible assets																																						71,000,000	6,000,000	3,000,000	25,000,000
Goodwill	249,000,000				23,000,000		166,000,000			39,000,000		44,000,000		43,000,000			69,000,000		30,000,000									23,000,000	166,000,000	39,000,000	0	0	69,000,000	0
Other assets	26,000,000
Total Assets Acquired	413,000,000
Liabilities assumed	73,000,000
Contingent Consideration Arrangements, Range of Outcomes, Value, High	33,000,000
Contingent consideration accrued at acquisition date	$ 25,000,000