Lease Commitments - Assets and Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Assets
Operating Lease Right-of-Use Asset	$ 478.0	$ 522.8
Liabilities
Operating Lease Liability	$ 648.8	$ 692.8
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other Assets	Other Assets
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Other Liabilities	Other Liabilities