Asset Impairments and Unusual Items - Components (Detail) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | |||
---|---|---|---|---|---|
Sep. 30, 2020 |
Jun. 30, 2020 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
|
Asset Impairments and Unusual Items | |||||
Gain from divestitures, net | $ (33) | $ (96) | |||
Asset impairments | $ 7 | $ 61 | 68 | $ 42 | 38 |
(Gain) loss from divestitures, asset impairments and unusual items | $ 35 | $ 42 | $ (58) |