Goodwill and Intangible Assets, Net - Goodwill (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Goodwill [Roll Forward]
Beginning Balance, Goodwill	$ 8,649	$ 3,422	$ 3,182
Foreign currency translation	(34)	(47)	122
ComDoc			106
ACS		5,127
EHRO		77
TMS		35
IBS		14
Unamic/HCN	43
Beakaway	33
ESM	28
Concept Group	26
MBM	20
Other Immaterial Acquisitions	38	21	12
Ending Balance, Goodwill	8,803	8,649	3,422
Information Technology [Member]
Goodwill [Roll Forward]
Beginning Balance, Goodwill	2,425	2,425	2,246
Foreign currency translation	(6)	(25)	61
ComDoc			106
ACS		0
EHRO		0
TMS		0
IBS		14
Unamic/HCN	0
Beakaway	0
ESM	0
Concept Group	26
MBM	20
Other Immaterial Acquisitions	(17)	(11)	12
Ending Balance, Goodwill	2,482	2,425	2,425
Services Segment [Member]
Goodwill [Roll Forward]
Beginning Balance, Goodwill	6,216	989	929
Foreign currency translation	(28)	(22)	60
ComDoc			0
ACS		5,127
EHRO		77
TMS		35
IBS		0
Unamic/HCN	43
Beakaway	33
ESM	28
Concept Group	0
MBM	0
Other Immaterial Acquisitions	(21)	(10)	0
Ending Balance, Goodwill	6,313	6,216	989
Other [Member]
Goodwill [Roll Forward]
Beginning Balance, Goodwill	8	8	7
Foreign currency translation	0	0	1
ComDoc			0
ACS		0
EHRO		0
TMS		0
IBS		0
Unamic/HCN	0
Beakaway	0
ESM	0
Concept Group	0
MBM	0
Other Immaterial Acquisitions	0	0	0
Ending Balance, Goodwill	$ 8	$ 8	$ 8

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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The increase (decrease) to the recorded value of goodwill for foreign currency translation adjustments.

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Acquisition of ACS in 2010

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Beakaway acquisition - in November 2011.

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ComDoc - acquisition of ComDoc in February 2009.

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Concept Group acquisition - in February 2011.

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EHRO acquisition - acquisition of ExcellerateHRO in July 2010.

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ESM acquisition - acquisition of Education Sales and Marketing in July 2011.

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No definition available.

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IBS acquisition - acquisition of Irish Business Systems in January 2010.

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MBM acquisition - formerly know as Modern Business Systems, acquired in December 2011.

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Other Immaterial Acquisitions - includes all other acquisitions not individually material enough to be called out separeately.

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TMS acquisition - acquisition of TMS Health in October 2010.

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No definition available.

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Unamic/HCN acquisition - acquisition in April 2011.

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