Intangible Assets and Goodwill (Intangible Assets) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,251	$ 1,162
Accumulated Amortization	1,142	1,114
Completed Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	657	635
Accumulated Amortization	632	627
Patents
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	276	276
Accumulated Amortization	276	276
Customer-related
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	201	137
Accumulated Amortization	125	103
Licensed Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	23	23
Accumulated Amortization	19	18
Other Intangibles
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	94	91
Accumulated Amortization	$ 90	$ 90