Segment Reporting - Segment Revenue and Segment Profit (Loss) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 primaryreportablesegment		Dec. 31, 2013		Dec. 31, 2012
Segment Reporting Information [Line Items]
Reportable segments, number	2
Revenue	$ 19,153	[1]	$ 19,523	[1]	$ 19,824	[1]
Finance income	387	[1]	483	[1]	597	[1]
Total Revenues	19,540	[1]	20,006	[1]	20,421	[1]
Interest expense	377	[1],[2],[3]	403	[1],[2],[3]	427	[1],[2],[3]
Segment profit (loss)	1,833	[1],[4]	1,802	[1],[4]	1,902	[1],[4]
Equity in net income of unconsolidated affiliates	160	[1]	169	[1]	152	[1]
Services Segment [Member]
Segment Reporting Information [Line Items]
Revenue	10,519	[1]	10,412	[1]	10,196	[1]
Finance income	65	[1]	67	[1]	75	[1]
Total Revenues	10,584		10,479		10,271
Interest expense	18	[1]	19	[1]	19	[1]
Segment profit (loss)	956	[1],[4]	1,055	[1],[4]	1,091	[1],[4]
Equity in net income of unconsolidated affiliates	32	[1]	34	[1]	30	[1]
Document Technology Segment [Member]
Segment Reporting Information [Line Items]
Revenue	8,044	[1]	8,500	[1]	8,951	[1]
Finance income	314	[1]	408	[1]	511	[1]
Total Revenues	8,358	[1]	8,908	[1]	9,462	[1]
Interest expense	121	[1]	140	[1]	172	[1]
Segment profit (loss)	1,149	[1],[4]	964	[1],[4]	1,065	[1],[4]
Equity in net income of unconsolidated affiliates	128	[1]	135	[1]	122	[1]
Other [Member]
Segment Reporting Information [Line Items]
Revenue	590	[1]	611	[1]	677	[1]
Finance income	8	[1]	8	[1]	11	[1]
Total Revenues	598	[1]	619	[1]	688	[1]
Interest expense	238	[1]	244	[1]	236	[1]
Segment profit (loss)	(272)	[1],[4]	(217)	[1],[4]	(254)	[1],[4]
Equity in net income of unconsolidated affiliates	$ 0	[1]	$ 0	[1]	$ 0	[1]
Outsourcing Offerings [Member] | Services Segment [Member]
Segment Reporting Information [Line Items]
Services segment description of offerings	2

[1] Asset information on a segment basis is not disclosed as this information is not separately identified and internally reported to our Chief Operating Decision Maker (CODM).

[2] (3)Excludes interest on capital lease obligations related to our ITO business which is held for sale and being reported as a discontinued operation at December 31, 2014. These obligations are expected to be assumed by the purchaser of the ITO business. Refer to Note 4 - Divestitures for additional information regarding this pending sale.

[3] (1)Includes Equipment financing interest expense, as well as non-financing interest expense included in Other expenses, net in the Consolidated Statements of Income.

[4] Depreciation and amortization expense, which is recorded in Cost of Sales, Cost of Services, RD&E and SAG are included in segment profit above. This information is neither identified nor internally reported to our CODM.