CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Common Stock in Treasury at Cost
Balance at Dec. 31, 2022	$ 3,185.7	$ 0.7	$ 806.0	$ 3,315.0	$ (92.3)	$ (843.7)
Net income	447.2	0.0	0.0	447.2	0.0	0.0
Pension and post-employment benefits, net of tax	(1.2)	0.0	0.0	0.0	(1.2)	0.0
Currency translation adjustments	(7.5)	0.0	0.0	0.0	(7.5)	0.0
Derivative instruments, net of tax	(8.9)	0.0	0.0	0.0	(8.9)	0.0
Cash dividends	(80.3)	0.0	0.0	(80.3)	0.0	0.0
Repurchases of Common Stock	(22.6)	0.0	0.0	0.0	0.0	(22.6)
Exercise of stock options	9.0	0.0	1.5	0.0	0.0	7.5
Stock-based compensation expense	25.7	0.0	25.7	0.0	0.0	0.0
Payment of stock-based restricted and performance shares	0.0	0.0	(5.9)	0.0	0.0	5.9
Shares tendered for taxes on stock-based compensation	(3.9)	0.0	0.0	0.0	0.0	(3.9)
Other	0.1	0.0	(0.4)	0.0	0.0	0.5
Balance at Sep. 30, 2023	3,543.3	0.7	826.9	3,681.9	(109.9)	(856.3)
Balance at Jun. 30, 2023	3,396.8	0.7	816.1	3,524.9	(83.2)	(861.7)
Net income	183.7	0.0	0.0	183.7	0.0	0.0
Pension and post-employment benefits, net of tax	(0.4)	0.0	0.0	0.0	(0.4)	0.0
Currency translation adjustments	(22.4)	0.0	0.0	0.0	(22.4)	0.0
Derivative instruments, net of tax	(3.9)	0.0	0.0	0.0	(3.9)	0.0
Cash dividends	(26.7)	0.0	0.0	(26.7)	0.0	0.0
Exercise of stock options	6.2	0.0	1.0	0.0	0.0	5.2
Stock-based compensation expense	10.1	0.0	10.1	0.0	0.0	0.0
Payment of stock-based restricted and performance shares	0.0	0.0	(0.3)	0.0	0.0	0.3
Shares tendered for taxes on stock-based compensation	(0.1)	0.0	0.0	0.0	0.0	(0.1)
Balance at Sep. 30, 2023	3,543.3	0.7	826.9	3,681.9	(109.9)	(856.3)
Balance at Dec. 31, 2023	3,705.3	0.7	823.0	3,805.8	(72.0)	(852.2)
Net income	528.3	0.0	0.0	528.3	0.0	0.0
Pension and post-employment benefits, net of tax	(1.3)	0.0	0.0	0.0	(1.3)	0.0
Currency translation adjustments	1.0	0.0	0.0	0.0	1.0	0.0
Cash dividends	(90.1)	0.0	0.0	(90.1)	0.0	0.0
Repurchases of Common Stock	(65.6)	0.0	0.0	0.0	0.0	(65.6)
Exercise of stock options	4.1	0.0	0.9	0.0	0.0	3.2
Stock-based compensation expense	29.4	0.0	29.4	0.0	0.0	0.0
Payment of stock-based restricted and performance shares	0.0	0.0	(12.1)	0.0	0.0	12.1
Shares tendered for taxes on stock-based compensation	(9.4)	0.0	0.0	0.0	0.0	(9.4)
Other	0.3	0.0	(0.2)	0.0	0.0	0.5
Balance at Sep. 30, 2024	4,102.0	0.7	841.0	4,244.0	(72.3)	(911.4)
Balance at Jun. 30, 2024	3,924.9	0.7	833.0	4,093.6	(101.7)	(900.7)
Net income	180.3	0.0	0.0	180.3	0.0	0.0
Pension and post-employment benefits, net of tax	(0.4)	0.0	0.0	0.0	(0.4)	0.0
Currency translation adjustments	29.9	0.0	0.0	0.0	29.9	0.0
Derivative instruments, net of tax	(0.1)	0.0	0.0	0.0	(0.1)	0.0
Cash dividends	(29.9)	0.0	0.0	(29.9)	0.0	0.0
Repurchases of Common Stock	(11.0)	0.0	0.0	0.0	0.0	(11.0)
Exercise of stock options	0.0	0.0	0.0	0.0	0.0	0.0
Stock-based compensation expense	9.0	0.0	9.0		0.0	0.0
Payment of stock-based restricted and performance shares	0.0	0.0	(1.1)	0.0	0.0	1.1
Shares tendered for taxes on stock-based compensation	(0.8)	0.0	0.0	0.0	0.0	(0.8)
Other	0.1	0.0	0.1	0.0	0.0	0.0
Balance at Sep. 30, 2024	$ 4,102.0	$ 0.7	$ 841.0	$ 4,244.0	$ (72.3)	$ (911.4)