Stockholders' Equity (Changes in Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Stockholders' equity, beginning of period	$ 4,656.8	$ 3,882.6	$ 3,443.8
Other comprehensive income (loss)	(197.1)	95.0	(31.3)
Stockholders' equity, end of period	3,742.8	4,656.8	3,882.6
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Stockholders' equity, beginning of period	(1,708.1)	(1,803.1)	(1,770.9)
Other comprehensive income (loss) before reclassifications	(224.0)	77.7	(52.7)
Net losses reclassified from accumulated other comprehensive loss	29.2	17.3	20.5
Other comprehensive income (loss)	(194.8)	95.0	(32.2)
Stockholders' equity, end of period	(1,902.9)	(1,708.1)	(1,803.1)
Defined Benefit Pension Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Stockholders' equity, beginning of period	(238.6)	(231.2)	(230.4)
Other comprehensive income (loss) before reclassifications	(3.1)	(15.7)	(7.2)
Net losses reclassified from accumulated other comprehensive loss	22.9	8.3	6.4
Other comprehensive income (loss)	19.8	(7.4)	(0.8)
Stockholders' equity, end of period	(218.8)	(238.6)	(231.2)
Cumulative Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Stockholders' equity, beginning of period	(1,468.7)	(1,571.0)	(1,540.1)
Other comprehensive income (loss) before reclassifications	(224.3)	102.3	(30.9)
Net losses reclassified from accumulated other comprehensive loss	0.0	0.0	0.0
Other comprehensive income (loss)	(224.3)	102.3	(30.9)
Stockholders' equity, end of period	(1,693.0)	(1,468.7)	(1,571.0)
Deferred gains and losses on derivatives
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Stockholders' equity, beginning of period	(0.8)	(0.9)	(0.4)
Other comprehensive income (loss) before reclassifications	3.4	(8.9)	(14.6)
Net losses reclassified from accumulated other comprehensive loss	6.3	9.0	14.1
Other comprehensive income (loss)	9.7	0.1	(0.5)
Stockholders' equity, end of period	$ 8.9	$ (0.8)	$ (0.9)