Schedule of Intangible Assets by Class (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 3,254	$ 3,315
Accumulated Amortization	1,440	1,434
Net Book Value	1,814	1,881
Customer Related Intangible Assets
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,699	1,699
Accumulated Amortization	489	440
Net Book Value	1,210	1,259
Acquired Software And Technology
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	392	420
Accumulated Amortization	203	204
Net Book Value	189	216
Trade Names
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	114	114
Accumulated Amortization	24	20
Net Book Value	90	94
Capitalized Software Development Costs
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	701	720
Accumulated Amortization	442	477
Net Book Value	259	243
Software
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	348	362
Accumulated Amortization	282	293
Net Book Value	$ 66	$ 69