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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2023
Income Tax Disclosure [Abstract]  
Schedule of Income (Loss) Before Income Tax Domestic and Foreign
Income (loss) from continuing operations before income taxes as shown in the Consolidated Statements of Operations consists of the following:
 Years Ended December 31,
 202320222021
 (in millions)
Domestic$(63.9)$(77.2)$(1.8)
Foreign101.6 105.5 67.8 
Total$37.7 $28.3 $66.0 
Schedule of Income Tax Expense (Benefit) in Consolidated Statements of Operations From Continuing Operations
A summary of income tax expense (benefit) from continuing operations in the Consolidated Statements of Operations is as follows:
 Years Ended December 31,
 202320222021
 (in millions)
Current:
Federal$12.1 $15.0 $(3.7)
Foreign24.8 23.2 17.8 
State1.6 0.2 0.1 
38.5 38.4 14.2 
Deferred:
Federal(11.0)(8.9)2.4 
Foreign1.8 (6.4)(6.8)
State1.5 1.3 (1.1)
(7.7)(14.0)(5.5)
Total$30.8 $24.4 $8.7 
Schedule of Deferred Income Tax Assets and Liabilities
Significant components of deferred income tax assets and liabilities are as follows:
As of December 31,
20232022
 (in millions)
Deferred income tax assets:
Net operating losses and tax credits$4.5 $18.5 
Environmental reserves9.5 10.2 
Accruals and reserves2.8 2.4 
Operating leases11.7 10.8 
Interest4.5 7.1 
Compensation and benefits9.3 8.6 
Inventories5.1 2.9 
Capitalization of research and development expense9.9 2.4 
Retained liabilities of previously owned businesses0.6 0.5 
Postretirement benefits other than pensions0.4 0.3 
Other— 0.1 
Gross deferred income tax assets58.3 63.8 
Valuation allowance(2.7)(10.7)
Total deferred income tax assets55.6 53.1 
Deferred income tax liabilities:
Depreciation and amortization(153.3)(160.6)
Operating leases(11.7)(10.8)
Cross currency swap(0.8)(2.1)
Pension obligations(2.4)(1.6)
Other(0.3)— 
Total deferred income tax liabilities(168.5)(175.1)
Net deferred income tax liabilities$(112.9)$(122.0)

The net deferred income tax liabilities are reflected on a jurisdictional basis as a component of the December 31, 2023 and 2022 Consolidated Balance Sheet line items noted below:
As of December 31,
20232022
 (in millions)
Other assets (non-current)$7.8 $12.8 
Deferred taxes and non-current income taxes payable(120.7)(134.8)
Net deferred income tax liabilities$(112.9)$(122.0)
Schedule of Reconciliation of Effective Tax Rate
The effective income tax rate from continuing operations varied from the statutory federal income tax rate as follows:
 Percent of Pretax Income
Years Ended December 31,
 202320222021
Statutory federal income tax rate21.0 %21.0 %21.0 %
U.S. taxation of foreign profits, net of foreign tax credits— — (5.6)
Research and employment tax credits(3.6)(2.2)(1.1)
State and local taxes3.0 1.5 (1.2)
Foreign tax rate differences24.9 8.4 10.1 
Statutory changes in tax rates(1.1)(1.1)0.2 
Valuation allowance(1.5)8.1 (5.1)
Changes in uncertain tax positions1.8 (3.4)(9.4)
Goodwill impairment33.8 48.4 — 
Nondeductible expenses2.3 2.3 4.1 
GILTI and FDII0.2 4.0 (0.4)
Other items, net0.8 (0.8)0.8 
Effective income tax rate81.6 %86.2 %13.4 %
Schedule of Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits
A reconciliation of the beginning and ending amount of the gross unrecognized tax benefits (excluding interest) is as follows:
(in millions)202320222021
Balance at beginning of year$4.5 $5.5 $12.2 
Additions based on tax positions related to the current year0.5 0.2 0.9 
Additions for tax positions of prior years0.2 (0.2)(0.2)
Reductions as a result of a lapse in the statute of limitations(0.2)(1.0)(2.9)
Reductions as a result of audit/other settlements— — (4.5)
Balance at end of year$5.0 $4.5 $5.5