Intangible Assets (Schedule Of Intangible Assets) (Detail) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Finite And Indefinite Lived Intangible Assets [Line Items]
Amortized Intangible Assets, Gross Carrying Amount	$ 534	$ 526
Amortized Intangible Assets, Accumulated Amortization	201	157
Amortized Intangible Assets, Net Carrying Amount	333	369
Unamortized Intangible Assets, Goodwill, Gross Carrying Amount	1,013	973
License Agreements [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Amortized Intangible Assets, Gross Carrying Amount	269	263
Amortized Intangible Assets, Accumulated Amortization	104	81
Amortized Intangible Assets, Net Carrying Amount	165	182
Customer Relationships [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Amortized Intangible Assets, Gross Carrying Amount	226	222
Amortized Intangible Assets, Accumulated Amortization	86	68
Amortized Intangible Assets, Net Carrying Amount	140	154
Other Intangible Assets [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Amortized Intangible Assets, Gross Carrying Amount	39	41
Amortized Intangible Assets, Accumulated Amortization	11	8
Amortized Intangible Assets, Net Carrying Amount	28	33
Goodwill [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Unamortized Intangible Assets, Goodwill, Gross Carrying Amount	1,013	973
Trademarks [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Unamortized Intangible Assets, Trademarks, Gross Carrying Amount	$ 552	$ 548