Income Taxes (Tables)

12 Months Ended

Dec. 31, 2023

Income Tax Disclosure [Abstract]

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

	2023		2022		2021
U.S.	$	(329.7)	$	(467.2)	$	(553.3)
International	(263.6)		(72.2)		(1.9)
Total (before equity earnings)	$	(593.3)	$	(539.4)	$	(555.2)

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	2023		2022		2021
Current
Federal	$	1.4	$	(4.5)	$	(11.4)
State	—		(0.7)		(0.2)
Foreign	2.7		1.7		0.9
Total current	$	4.1	$	(3.5)	$	(10.7)
Deferred
Federal	$	11.1	$	10.2	$	(14.0)
State	3.2		2.5		15.9
Foreign	4.1		(4.0)		(8.4)
Total deferred	18.4		8.7		(6.5)
Total income tax provision (benefit)	$	22.5	$	5.2	$	(17.2)

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	2023				2022				2021
Tax at U.S. Federal statutory rate	$	(124.6)	21.0	%	$	(113.3)	21.0	%	$	(116.5)	21.0	%
State income taxes, net of Federal benefit	(6.4)		1.1		(9.6)		1.8		(24.9)		4.5
State income tax credits, net of Federal benefit	(8.6)		1.4		(15.6)		2.9		(7.4)		1.3
Foreign rate differences	(12.1)		2.0		(3.5)		0.6		(5.2)		0.9
Research and experimentation	(4.2)		0.7		(5.2)		1.0		(1.6)		0.3
Excess tax benefits	0.9		(0.2)		0.4		(0.1)		0.8		(0.1)
Non-deductible expenses	17.2		(2.9)		4.2		(0.8)		1.9		(0.3)
Re-measurement of Deferred Taxes	(9.0)		1.5		(7.1)		1.3		(58.8)		10.6
Global Intangible Low-Taxed Income (GILTI) Tax	—		—		(1.8)		0.3		0.9		(0.2)
Valuation Allowance	154.5		(26.0)		170.6		(31.6)		204.2		(36.9)
NOL Utilized at 35% vs 21%	—		—		—		—		(5.3)		1.0
Previously unrecognized tax benefit	(0.3)		0.1		(10.6)		2.0		—		—
Other	15.1		(2.5)		(3.3)		0.6		(5.3)		1.0
Total income tax provision (benefit)	$	22.5	(3.8	%)	$	5.2	(1.0)	%	$	(17.2)	3.1	%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	2023		2022
Depreciation and amortization	$	(87.7)	$	(116.6)
Long-term contracts	125.3		113.3
State income tax credits	154.1		145.2
Net operating loss carryforward	489.7		438.1
Accruals and reserves	47.3		46.2
Employee compensation accruals	26.9		21.1
Pension and other employee benefit plans	(15.9)		(32.8)
Interest expense limitation	89.9		76.3
Post-retirement benefits other than pensions	8.9		7.9
Other	19.7		18.4
Inventory	0.9		0.5
Interest swap contracts	(0.7)		0.6
Net deferred tax asset before valuation allowance	858.4		718.2
Valuation allowance	(867.4)		(714.7)
Net deferred tax asset (liability)	(9.0)		3.5

Schedule of Unrecognized Tax Benefits Roll Forward

	2023		2022		2021
Beginning balance at January 1	$	8.1	$	18.3	$	16.5
Remeasurement for tax rate change	—		—		2.0
Gross increases (decreases) related to current period tax positions	(0.4)		0.4		0.4
Statute of limitations' expiration	(0.6)		(10.6)		(0.6)
Ending balance at December 31	$	7.1	$	8.1	$	18.3