Quarterly report pursuant to Section 13 or 15(d)

Identified Intangible Assets, Indefinite-Lived Intangible Asset (Detail)

v3.8.0.1
Identified Intangible Assets, Indefinite-Lived Intangible Asset (Detail) - USD ($)
$ in Millions
Sep. 30, 2017
Dec. 31, 2016
Indefinite-lived Intangible Assets [Line Items]    
Gross Assets, Not Subject to Amortization $ 2,168 $ 808
In Process Research and Development [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Gross Assets, Not Subject to Amortization $ 2,168 $ 808