v3.10.0.1
Supplemental Financial Information - Other Income (Expense) (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Discontinued Operations And Disposal Groups [Abstract]      
Result on disposal of businesses $ 39 $ 1,572 $ 8
Result on disposal of properties 1 1 1
Other income (expense) 1,961 2 0
Other income (expense), net $ 2,001 $ 1,575 $ 9