Intangible Assets And Goodwill (Intangible Assets) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,162	$ 1,162
Accumulated Amortization	1,126	1,114
Completed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	635	635
Accumulated Amortization	629	627
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	277	277
Accumulated Amortization	277	277
Customer-Related [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	137	137
Accumulated Amortization	113	103
Licensed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	23	23
Accumulated Amortization	18	18
Other Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	90	90
Accumulated Amortization	$ 89	$ 89