Stock Compensation (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Company recognized total stock compensation expense, net of forfeitures	$ 38.1	$ 29.2	$ 36.6
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested, beginning balance	100,000	400,000
Nonvested, ending balance	0.0	100,000	400,000
Restricted Share Activity [Roll Forward]
Stock Issued During Period, Value, Employee Stock Purchase Plan	$ 7.6		$ 3.9
Stock Issued During Period, Value, Employee Stock Purchase Plan	7.6		3.9
Share Based Compensation, excluding ESPP	36.1	$ 26.8
Director Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	$ 2.0	$ 2.0	$ 1.6
Intrinsic value of the unvested	$ 2,100,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	4 months
Number of shares granted	61,000	81,000	68,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$ 0.7
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested, beginning balance	81,000	63,000	36,000
Vested during period	(82,000)	(63,000)	(41,000)
Forfeited during period	0	0	0
Nonvested, ending balance	60,000	81,000	63,000
Restricted Share Activity [Roll Forward]
Nonvested, beginning balance, value	$ 2.0	$ 2.0	$ 1.6
Granted during period, value	2.0	2.0	2.2
Vested during period, value	(2.0)	(2.0)	(1.8)
Forfeited during period, value	0.0	0.0	0.0
Nonvested, ending balance, value	$ 2.0	2.0	2.0
Long Term Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Intrinsic value of the unvested	$ 50,900,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	1 year 8 months 12 days
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$ 29.3
Long Term Incentive Plan [Member] | Class A [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	$ 34.1	$ 24.2	$ 32.1
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Nonvested, beginning balance	2,079,000	1,703,000	1,402,000
Granted during period	1,204,000	1,694,000	839,000
Vested during period	(1,319,000)	(494,000)	(396,000)
Forfeited during period	(484,000)	(824,000)	(142,000)
Nonvested, ending balance	1,480,000	2,079,000	1,703,000
Restricted Share Activity [Roll Forward]
Nonvested, beginning balance, value	$ 70.0	$ 82.7	$ 68.9
Granted during period, value	40.1	49.7	46.0
Vested during period, value	(47.6)	(23.8)	(20.6)
Forfeited during period, value	(20.7)	(38.6)	(11.6)
Nonvested, ending balance, value	$ 41.8	$ 70.0	$ 82.7
Restricted Stock Units (RSUs) [Member] | LTIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted	816,238	1,229,552	553,578
Share-based Payment Arrangement | LTIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Date Of Fair Value Of Shares Granted	$ 25.2	$ 29.6	$ 24.0
Performance Shares | LTIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted	388,386	463,939	284,653
Grant Date Of Fair Value Of Shares Granted	$ 14.9	$ 20.1	$ 22.0
Union ratification stock awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Payment Arrangement, Expense	$ 0.0	$ 0.6
Number of shares granted	0	22,594
Employee Stock
Restricted Share Activity [Roll Forward]
Stock Issued During Period, Value, Employee Stock Purchase Plan	$ 2.0	$ 2.5	0.0
Stock Issued During Period, Value, Employee Stock Purchase Plan	$ 2.0	$ 2.5	$ 0.0