v3.26.1
Amounts Recorded on Balance Sheets Related to Cumulative Basis Adjustments for Fair Value Hedges (Detail) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Derivative [Line Items]    
Carrying amount of the hedged liabilities $ 719.4 $ 654.3
Medium-term Notes    
Derivative [Line Items]    
Cumulative basis adjustment included in the carrying amount $ 1.4 $ 4.3