Restructuring and Asset Impairment Charges (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Restructuring reserve [Roll Forward]
Balance at beginning of period	$ 116		$ 130		$ 123
Restructuring provision	155		144		163
Reversals of prior accruals	(27)		(29)		(14)
Net current period restructuring charges, continuing operations	128	[1]	115	[1]	149	[1]
Discontinued operations	2	[2]	7	[2]	4	[2]
Net Current Period Charges	130		122		153
Charges against reserve and currency	(149)		(136)		(146)
Balance at end of period	97		116		130
Reconciliation to the Condensed Consolidated Statements of Cash Flows [Abstract]
Asset impairment	7		1		1
Effects of foreign currency and other non-cash items	9		(1)		1
Restructuring Cash Payments	(133)		(136)		(144)
Services Segment [Member]
Restructuring reserve [Roll Forward]
Net current period restructuring charges, continuing operations	38		38		66
Document Technology Segment [Member]
Restructuring reserve [Roll Forward]
Net current period restructuring charges, continuing operations	76		77		83
All Other Segments [Member]
Restructuring reserve [Roll Forward]
Net current period restructuring charges, continuing operations	14		0		0
Employee Severance [Member]
Restructuring reserve [Roll Forward]
Balance at beginning of period	109		123		116
Restructuring provision	143		141		156
Reversals of prior accruals	(25)		(29)		(13)
Net current period restructuring charges, continuing operations	118		112		143
Discontinued operations	2	[2]	7	[2]	4	[2]
Net Current Period Charges	120		119		147
Charges against reserve and currency	(136)		(133)		(140)
Balance at end of period	93		109		123
Lease Cancellation and Other Costs [Member]
Restructuring reserve [Roll Forward]
Balance at beginning of period	7		7		7
Restructuring provision	5		2		5
Reversals of prior accruals	(2)		0		0
Net current period restructuring charges, continuing operations	3		2		5
Discontinued operations	0	[2]	0	[2]	0	[2]
Net Current Period Charges	3		2		5
Charges against reserve and currency	(6)		(2)		(5)
Balance at end of period	4		7		7
Asset Impairments [Member]
Restructuring reserve [Roll Forward]
Balance at beginning of period	0	[3]	0	[3]	0	[3]
Restructuring provision	7	[3]	1	[3]	2	[3]
Reversals of prior accruals	0	[3]	0	[3]	(1)	[3]
Net current period restructuring charges, continuing operations	7	[3]	1	[3]	1	[3]
Discontinued operations	0	[2],[3]	0	[2],[3]	0	[2],[3]
Net Current Period Charges	7	[3]	1	[3]	1	[3]
Charges against reserve and currency	(7)	[3]	(1)	[3]	(1)	[3]
Balance at end of period	$ 0	[3]	$ 0	[3]	$ 0	[3]

[1] (2)Represents amount recognized within the Consolidated Statements of Income for the years shown.

[2] (1)Refer to Note 4 - Divestitures for additional information regarding discontinued operations.

[3] (1)Charges associated with asset impairments represent the write-down of the related assets to their new cost basis and are recorded concurrently with the recognition of the provision.