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Employee Benefit Plans - Estimated Future Benefit Payments (Detail)
$ in Millions
Sep. 30, 2021
USD ($)
Pension Benefits [Member] | U.S. Defined Benefit Plans [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2027 - 2030 $ 1
Pension Benefits [Member] | Foreign Plans [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2022 10
2023 11
2024 12
2025 11
2026 11
2027 - 2030 59
Postretirement Benefits [Member] | U.S. Defined Benefit Plans [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2022 2
2023 2
2024 2
2025 2
2026 2
2027 - 2030 8
Postretirement Benefits [Member] | Foreign Plans [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2022 1
2023 1
2024 1
2025 1
2026 1
2027 - 2030 $ 4