Income Tax - Deferred Tax Assets And Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Deferred tax assets
Compensation-related obligations	$ 47.1	$ 43.2
Pension and postretirement benefits	14.2	23.7
Tax credit carryforwards	37.8	36.0
Tax loss carryforwards	305.3	312.8
Accrued liabilities and other	216.4	202.5
Valuation allowance	(79.9)	(61.9)
Deferred tax assets	540.9	556.3
Deferred tax liabilities
Fixed assets	348.6	354.9
Partnerships and investments	44.9	38.7
Intangible assets	2,738.3	2,679.9
Derivative instruments	42.3	12.2
Accrued liabilities and other	13.4	0.0
Deferred tax liabilities	3,187.5	3,085.7
Net deferred tax liabilities	$ 2,646.6	$ 2,529.4