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Commitments, Contingencies and Off-Balance Sheet Arrangements - Off-Balance Sheet Commitments (Detail)
$ in Millions
 9 Months Ended
Sep. 30, 2022
USD ($)
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]  
Amount of Commitment Expiration by Period - 2022 $ 0.3
Amount of Commitment Expiration by Period - 2023 1.3
Amount of Commitment Expiration by Period - 2024 1.9
Amount of Commitment Expiration by Period - 2025 0.2
Amount of Commitment Expiration by Period - 2026 0.1
Amount of Commitment Expiration by Period - Thereafter 13.1
Total Amounts Committed 16.9
Financial Guarantees [Member]  
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]  
Amount of Commitment Expiration by Period - 2022 0.3
Amount of Commitment Expiration by Period - 2023 1.3
Amount of Commitment Expiration by Period - 2024 1.9
Amount of Commitment Expiration by Period - 2025 0.2
Amount of Commitment Expiration by Period - 2026 0.1
Amount of Commitment Expiration by Period - Thereafter 0.1
Total Amounts Committed 3.9
Letters of Credit [Member]  
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]  
Amount of Commitment Expiration by Period - Thereafter 13.0
Total Amounts Committed $ 13.0