Equity (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	$ (89.6)	$ (203.9)
Class of Stock [Line Items]
Employee Stock Purchase Plan, Number of Allocated Shares	1,000,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Preferred Stock, Shares Authorized	10,000,000	10,000,000
Equity, Class of Treasury Stock [Line Items]
Common Stock, Dividends, Per Share, Declared	$ 0.00	$ 0.03	$ 0.04
Issued But Unvested Shares (in shares)	100,000	400,000	700,000
Noncontrolling interest	$ 3.8	$ 3.7
Payments of Dividends	$ 0.0	$ 4.2	$ 4.3
Basic EPS
(Loss) income available to common shareholders			$ (540.8)
(Loss) income available to common shareholders (in shares)	106,600,000	104,600,000	104,200,000
Earnings Per Share, Basic	$ (5.78)	$ (5.21)	$ (5.19)
Income allocated to participating securities	$ 0.0	$ 0.0	$ 0.0
Income allocated to participating securities, shares	0	0	0
Net loss	$ (616.2)	$ (545.7)	$ (540.8)
Diluted potential common shares (in shares)
Diluted EPS
Net income	$ (616.2)	$ (545.7)	$ (540.8)
Shares	106,600,000	104,600,000	104,200,000
(Loss) earnings per share, diluted (in dollars per share)	$ (5.78)	$ (5.21)	$ (5.19)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss)	$ (89.6)	$ (203.9)
AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax	$ 2.2	(7.1)
Share-Based Payment Arrangement, Shares Withheld for Tax Withholding Obligation	17,680
Noncontrolling Interest [Line Items]
Stockholders' Equity Attributable to Noncontrolling Interest	$ 3.8	3.7
Noncontrolling Interest - SEAS	3.3
Noncontrolling Interest - KIESC	0.5
Proceeds from Issuance of Common Stock	220.7	0.0	$ 0.0
Foreign Currency Impact On Long Term Intercompany Loan [Member]
Equity [Abstract]
Accumulated Other Comprehensive Income (Loss)	(14.6)	(16.4)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss)	$ (14.6)	$ (16.4)
Common Class A [Member]
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Common Stock, Shares Authorized	200,000,000	200,000,000
Class B [Member]
Common Stock, Number of Shares, Par Value and Other Disclosures [Abstract]
Common Stock, Shares Authorized	0	0