Accumulated Other Comprehensive Income (Loss) - Rollforward (Details) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($) pension_plan	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 26, 2024 pension_plan
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		$ 13,407.2	$ 12,915.2	$ 13,664.1
Ending balance		13,284.2	13,407.2	12,915.2
Settlement loss	$ 34.0	$ 34.0
Purchased annuity contracts, number of Canadian pension plans | pension_plan		2			2
Foreign currency translation adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		$ (778.0)	(875.2)	(558.7)
OCI before reclassifications before tax		(3.5)
Reclassification of AOCI, current period, before tax			(0.7)	12.1
Tax benefit (expense)		(20.2)	10.9	(25.7)
Ending balance		(1,087.0)	(778.0)	(875.2)
Accumulated foreign currency adjustment, excluding net investment hedging, attributable to parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
OCI before reclassifications before tax		(339.9)	113.5	(356.1)
Accumulated foreign currency adjustment, net investment hedging, attributable to parent
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
OCI before reclassifications before tax		54.6	(26.5)	53.2
AOCI foreign currency translation adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
OCI before reclassifications before tax		(339.9)	113.5	(354.9)
Gain (loss) on derivative instruments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		30.6	32.2	(131.0)
OCI before reclassifications before tax		70.6	(3.6)	209.7
Reclassification of AOCI, current period, before tax		(0.3)	1.3	12.9
Tax benefit (expense)		(17.3)	0.7	(59.4)
Ending balance		83.6	30.6	32.2
Pension and postretirement benefit adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(352.7)	(335.1)	(275.1)
Reclassification of AOCI, current period, before tax		24.3	(15.0)	(2.1)
Tax benefit (expense)		(3.9)	5.9	19.1
Ending balance		(342.4)	(352.7)	(335.1)
Foreign currency translation adjustments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
OCI before reclassifications before tax			0.0	1.2
Net change in pension and other postretirement benefit assets and liabilities recognized in other comprehensive income (loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
OCI before reclassifications before tax		(10.1)	(8.5)	(78.2)
Equity method investments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(16.2)	(27.4)	(41.2)
OCI before reclassifications before tax		(0.5)	15.4	18.7
Tax benefit (expense)		0.1	(4.2)	(4.9)
Ending balance		(16.6)	(16.2)	(27.4)
Accumulated other comprehensive income (loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance		(1,116.3)	(1,205.5)	(1,006.0)
Tax benefit (expense)		(41.3)	13.3	(70.9)
Ending balance		$ (1,362.4)	$ (1,116.3)	$ (1,205.5)