Other Comprehensive Income (Loss) - Amounts Reclassified from Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other expense (income) - net	$ 5.2	$ (3.9)	$ 16.2
Reclassification adjustments	51.7	40.7	41.0
Income before income taxes	(760.3)	(749.4)	(579.8)
Provision for income taxes	164.7	162.7	130.5
Total net of tax	(596.1)	(586.9)	(449.4)
Reclassification out of Accumulated Other Comprehensive Income | Retirement Benefits Adjustments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	(1.5)	0.5	10.3
Provision for income taxes	0.4	(0.1)	(2.4)
Total net of tax	(1.1)	0.4	7.9
Reclassification out of Accumulated Other Comprehensive Income | Amortization and settlement gain
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other expense (income) - net	(1.4)	0.5	1.8
Reclassification out of Accumulated Other Comprehensive Income | Settlement (gain) loss recognized
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other expense (income) - net	(0.1)	0.0	10.5
Reclassification out of Accumulated Other Comprehensive Income | Curtailment gain recognized
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other expense (income) - net	0.0	0.0	(2.0)
Reclassification out of Accumulated Other Comprehensive Income | Derivatives Adjustments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification adjustments	0.0	0.0	3.3
Income before income taxes	0.0	0.0	3.3
Provision for income taxes	0.0	0.0	(0.8)
Total net of tax	$ 0.0	$ 0.0	2.5
Reclassification out of Accumulated Other Comprehensive Income | Derivatives Adjustments | Acceleration Due to Cash Settlement on Derivatives
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification adjustments			$ 1.3