XML 159 R152.htm IDEA: XBRL DOCUMENT v3.8.0.1
Inventories - Summary of inventories (Detail) - USD ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Classes Of Inventories [Abstract]    
Raw materials and purchased components $ 648 $ 470
Consumable stores 875 840
Work in progress 1,082 970
Finished goods and goods for resale 1,027 800
Inventories 3,632 3,080
Expected to be used within one year 3,472 2,937
Expected to be used after more than one year $ 160 $ 143