Intangible Assets (Schedule Of Intangible Assets) (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Finite And Indefinite Lived Intangible Assets [Line Items]
Amortized Intangible Assets, Gross Carrying Amount	$ 339	$ 334
Amortized Intangible Assets, Accumulated Amortization	55	42
Amortized Intangible Assets, Net Carrying Amount	284	292
Unamortized Intangible Assets, Goodwill, Gross Carrying Amount	348	353
License Agreements [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Amortized Intangible Assets, Gross Carrying Amount	254	252
Amortized Intangible Assets, Accumulated Amortization	37	29
Amortized Intangible Assets, Net Carrying Amount	217	223
Customer Relationships [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Amortized Intangible Assets, Gross Carrying Amount	83	80
Amortized Intangible Assets, Accumulated Amortization	17	12
Amortized Intangible Assets, Net Carrying Amount	66	68
Other Intangible Assets [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Amortized Intangible Assets, Gross Carrying Amount	2	2
Amortized Intangible Assets, Accumulated Amortization	1	1
Amortized Intangible Assets, Net Carrying Amount	1	1
Goodwill [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Unamortized Intangible Assets, Goodwill, Gross Carrying Amount	348	353
Trademarks [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Unamortized Intangible Assets, Trademarks, Gross Carrying Amount	$ 424	$ 421