Basis of Presentation - Credit loss adoption (Detail) - USD ($) $ in Millions |
6 Months Ended | ||||
---|---|---|---|---|---|
Jan. 01, 2020 |
Jun. 30, 2020 |
Dec. 31, 2019 |
Jun. 30, 2019 |
Dec. 31, 2018 |
|
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] | |||||
Adoption of new accounting standard | $ (2) | ||||
Allowance for doubtful accounts | 46 | $ 28 | $ 28 | $ 29 | |
Accounting Standards Update 2016-13 [Member] | Adjustment [Member] | |||||
Revenue, Initial Application Period Cumulative Effect Transition [Line Items] | |||||
Adoption of new accounting standard | $ (2) | ||||
Allowance for doubtful accounts | $ (1) | $ (1) |