Intangible Assets (Schedule Of Intangible Assets) (Detail) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Finite And Indefinite Lived Intangible Assets [Line Items]
Amortized Intangible Assets, Gross Carrying Amount	$ 530	$ 526
Amortized Intangible Assets, Accumulated Amortization	186	157
Amortized Intangible Assets, Net Carrying Amount	344	369
Unamortized Intangible Assets, Goodwill, Gross Carrying Amount	1,004	973
License Agreements [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Amortized Intangible Assets, Gross Carrying Amount	267	263
Amortized Intangible Assets, Accumulated Amortization	96	81
Amortized Intangible Assets, Net Carrying Amount	171	182
Customer Relationships [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Amortized Intangible Assets, Gross Carrying Amount	225	222
Amortized Intangible Assets, Accumulated Amortization	80	68
Amortized Intangible Assets, Net Carrying Amount	145	154
Other Intangible Assets [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Amortized Intangible Assets, Gross Carrying Amount	38	41
Amortized Intangible Assets, Accumulated Amortization	10	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	1,004	973
Trademarks [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Unamortized Intangible Assets, Trademarks, Gross Carrying Amount	$ 552	$ 548