v3.26.3
Commitments, Contingencies and Off-Balance Sheet Arrangements - Off-Balance Sheet Commitments (Detail)
$ in Millions
 3 Months Ended
Sep. 30, 2026
USD ($)
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]  
Amount of Commitment Expiration by Period - 2026 $ 0
Amount of Commitment Expiration by Period - 2027 0
Amount of Commitment Expiration by Period - 2028 0
Amount of Commitment Expiration by Period - 2029 0
Amount of Commitment Expiration by Period - 2030 0
Amount of Commitment Expiration by Period - Thereafter 46
Total Amounts Committed 46
Financial guarantees  
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]  
Amount of Commitment Expiration by Period - 2026 0
Amount of Commitment Expiration by Period - 2027 0
Amount of Commitment Expiration by Period - 2028 0
Amount of Commitment Expiration by Period - 2029 0
Amount of Commitment Expiration by Period - 2030 0
Amount of Commitment Expiration by Period - Thereafter 44
Total Amounts Committed 44
Letters of credit  
Commitments Contingencies And Off Balance Sheet Arrangements [Line Items]  
Amount of Commitment Expiration by Period - 2026 0
Amount of Commitment Expiration by Period - 2027 0
Amount of Commitment Expiration by Period - 2028 0
Amount of Commitment Expiration by Period - 2029 0
Amount of Commitment Expiration by Period - 2030 0
Amount of Commitment Expiration by Period - Thereafter 2
Total Amounts Committed $ 2