v3.19.3.a.u2
Inventory - Schedule of Inventory (Detail) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Raw materials $ 1,428 $ 932
Work in process 362 297
Finished goods 1,356 1,581
Service parts 406 303
Total $ 3,552 $ 3,113