Goodwill and Other Identifiable Intangible Assets (Identifiable Intangible Assets with Finite Lives) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,614	$ 1,680
Accumulated Amortization	(897)	(919)
Net	717	761
Acquired technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	508	516
Accumulated Amortization	(342)	(342)
Net	166	174
Customer-related intangibles [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	962	1,010
Accumulated Amortization	(476)	(491)
Net	486	519
Tradenames [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	114	120
Accumulated Amortization	(54)	(57)
Net	60	63
Other [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	30	34
Accumulated Amortization	(25)	(29)
Net	$ 5	$ 5