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Goodwill and Other Intangible Assets - Schedule of Project Related Intangibles (Parenthetical) (Detail) - Project Related Intangibles [Member]
$ in Millions
Mar. 31, 2020
USD ($)
Finite Lived Intangible Assets [Line Items]  
Amortization expense, remainder of 2020 $ 10
Amortization expense, 2021 4
Amortization expense, 2022 3
Amortization expense, 2023 $ 2