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Shareholders Equity Shareholders' Equity (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended						9 Months Ended
	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2025	Sep. 30, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance			$ 2,244.3				$ 2,244.3
Net income	$ 187.3			$ 62.9			262.3	$ 239.2
Net other comprehensive income (loss)	1.0			0.1			3.7	(0.8)
Ending balance	2,450.6						2,450.6
Net Income (Loss) Attributable to Noncontrolling Interest	(0.8)			(1.7)			(3.0)	(0.5)
Net Income (Loss) Attributable to Parent	188.1			64.6			265.3	239.7
Payments for Repurchase of Common Stock	75.0			$ 100.0			75.0	$ 100.0
Share Repurchase Program, Remaining Authorized, Amount	$ 200.0						$ 200.0
Non-U.S. Subsidiary
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Subsidiary, Ownership Percentage, Noncontrolling Owner				51.00%				51.00%
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance (in shares)	76.3	76.3	76.2	75.4	75.4	75.4	76.2	75.4
Beginning balance	$ 0.8	$ 0.8	$ 0.8	$ 0.8	$ 0.8	$ 0.8	$ 0.8	$ 0.8
Shares Issued Under Share Based Compensation Plans, Shares	0.1			0.8
Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period			0.1
Ending balance (in shares)	76.4	76.3	76.3	76.2	75.4	75.4	76.4	76.2
Ending balance	$ 0.8	$ 0.8	$ 0.8	$ 0.8	$ 0.8	$ 0.8	$ 0.8	$ 0.8
Additional Paid-in Capital
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance	1,124.6	1,118.6	1,113.3	1,134.8	1,127.7	1,119.8	1,113.3	1,119.8
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition	6.8	6.0	5.6	7.0	7.4	8.0
Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation	(2.8)		(0.3)	(29.3)	(0.3)	(0.1)
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests				4.1
Noncontrolling Interest, Increase from Sale of Parent Equity Interest				(8.4)
Ending balance	1,128.6	1,124.6	1,118.6	1,108.2	1,134.8	1,127.7	1,128.6	1,108.2
Warrants
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance	16.4	16.4	16.4	16.4	16.4	16.4	16.4	16.4
Ending balance	16.4	16.4	16.4	16.4	16.4	16.4	16.4	16.4
Retained Earnings
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance	1,476.1	1,361.0	1,398.9	1,200.6	1,051.0	1,025.5	1,398.9	1,025.5
Net income	188.1			64.6
Ending balance	1,664.2	1,476.1	1,361.0	1,265.2	1,200.6	1,051.0	1,664.2	1,265.2
Net Income (Loss) Attributable to Parent		115.1	(37.9)		149.6	25.5
AOCI
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance	36.9	35.3	34.2	24.3	25.1	25.2	34.2	25.2
Other Comprehensive (Income) Loss, Defined Benefit Plan, before Reclassification Adjustment, after Tax	(0.2)	(0.2)	(0.2)	(0.1)	(0.2)	(0.2)
Net other comprehensive income (loss)	1.2	1.8	1.3	0.2	(0.6)	0.1
Ending balance	37.9	36.9	35.3	24.4	24.3	25.1	37.9	24.4
Treasury Stock, Common
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance	(325.1)	(325.1)	(325.1)	(200.1)	(200.1)	(200.1)	(325.1)	(200.1)
Ending balance	(400.1)	(325.1)	(325.1)	(300.1)	(200.1)	(200.1)	(400.1)	(300.1)
Payments for Repurchase of Common Stock	75.0			100.0
Non-controlling Interest
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Beginning balance	3.6	4.5	5.8	10.6	9.4	9.4	5.8	9.4
Net income	(0.8)			(1.7)
Noncontrolling Interest, Decrease from Redemptions or Purchase of Interests				(8.4)
Noncontrolling Interest, Increase from Sale of Parent Equity Interest				8.4
Ending balance	$ 2.8	3.6	4.5	$ 8.9	10.6	9.4	$ 2.8	$ 8.9
Net Income (Loss) Attributable to Noncontrolling Interest		$ (0.9)	$ (1.3)		$ 1.2	$ 0.0

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