Amount of Expense (Income) on Cash Flow and Fair Value Hedges Recognized in Interest and Other Borrowing Costs on Statements of Comprehensive Income and Retained Earnings (Detail) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Derivative Instruments and Hedging Activities Disclosure [Abstract] | ||||
| Derivatives | $ 6.8 | $ (4.3) | $ 9.3 | $ (14.3) |
| Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Interest And Other Borrowing Costs | Interest And Other Borrowing Costs | Interest And Other Borrowing Costs | Interest And Other Borrowing Costs |
| Hedged items | $ (6.8) | $ 4.6 | $ (9.0) | $ 15.5 |
| Reclassified from AOCI into income | (1.2) | 1.0 | (2.0) | (0.3) |
| Total (income) and expense | $ (1.2) | $ 1.3 | $ (1.7) | $ 0.9 |