Restructuring Programs (Details) $ in Millions		3 Months Ended
		Mar. 31, 2016 USD ($) Employees		Mar. 31, 2015 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Number of Positions Eliminated (approximately) | Employees		4,800
Restructuring Reserve [Roll Forward]
Balance at beginning of period		$ 24
Provision		126
Reversals		(3)
Net Current Period Charges		123	[1]	$ 14
Charges against reserve and currency		(27)		(37)
Balance at end of period		120
Reconciliation To Consolidated Statements Of Cash Flows [Abstract]
Charges against reserve		(27)		(37)
Asset impairments		0		0
Effects of foreign currency and other non-cash items		(1)		6
Restructuring Cash Payments		(28)		(31)
Services
Restructuring Reserve [Roll Forward]
Net Current Period Charges		37		5
Technology Segment [Member]
Restructuring Reserve [Roll Forward]
Net Current Period Charges		86		9
Corporate and Other [Member]
Restructuring Reserve [Roll Forward]
Net Current Period Charges		0		$ 0
Severance and Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		124
Restructuring Reserve [Roll Forward]
Balance at beginning of period		22
Provision		124
Reversals		(3)
Net Current Period Charges	[1]	121
Charges against reserve and currency		(23)
Balance at end of period		120
Reconciliation To Consolidated Statements Of Cash Flows [Abstract]
Charges against reserve		(23)
Lease Cancellation and Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		2
Restructuring Reserve [Roll Forward]
Balance at beginning of period		2
Provision		2
Reversals		0
Net Current Period Charges	[1]	2
Charges against reserve and currency		(4)
Balance at end of period		0
Reconciliation To Consolidated Statements Of Cash Flows [Abstract]
Charges against reserve		(4)
Asset Impairments [Member]
Restructuring Reserve [Roll Forward]
Balance at beginning of period	[2]	0
Provision	[2]	0
Reversals	[2]	0
Net Current Period Charges	[1],[2]	0
Charges against reserve and currency	[2]	0
Balance at end of period	[2]	0
Reconciliation To Consolidated Statements Of Cash Flows [Abstract]
Charges against reserve	[2]	$ 0

[1] Represents net amount recognized within the Condensed Consolidated Statements of Income for the period shown.

[2] 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.