Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Income Tax Disclosure [Abstract]

Components of the provision for income taxes

The components of the provision for income taxes are as follows:

	Year Ended December 31,
	2019			2018			2017
	(in millions)
Current:
Federal	$	7.6		$	(5.4	)	$	29.3
State	3.0			0.8			0.5
Foreign	5.6			1.5			0.3
Total current	16.2			(3.1		)	30.1
Deferred:
Federal:
Effect of Tax Cuts and Jobs Act	—			(1.5		)	(6.2		)
Other	22.6			24.8			16.6
	22.6			23.3			10.4
State	(0.6		)	5.4			0.9
Foreign	(4.7		)	(6.3		)	(1.0		)
Total deferred	17.3			22.4			10.3
Provision	$	33.5		$	19.3		$	40.4

Reconciliation between the statutory U.S. Federal income tax rate and the Company's effective income tax rate

The following is a reconciliation between the statutory U.S. federal income tax rate and the Company’s effective income tax rate on income before income taxes:

	Year Ended December 31,
	2019		2018		2017
Statutory rate	21.0	%	21.0	%	35.0	%
State taxes	3.1		3.1		2.5
Domestic production activities deduction	—		—		(2.1	)
Changes in valuation allowances and reserves	(1.3	)	(1.2	)	1.3
Changes in tax reserves	(0.3	)	(1.4	)	0.8
Effect of Tax Cuts and Jobs Act	—		(1.6	)	(5.0	)
Prior year true-ups	(0.5	)	(0.4	)	(2.2	)
Foreign adjustments	0.6		2.4		1.8
Other, net	0.2		(1.6	)	(1.0	)
Effective rate	22.8	%	20.3	%	31.1	%

Components of deferred tax liabilities and assets

The components of deferred tax liabilities and assets are as follows:

	December 31,
	2019			2018
	(in millions)
Deferred tax liabilities:
Depreciation, depletion, and amortization	$	109.1		$	103.2
Total deferred tax liabilities	109.1			103.2
Deferred tax assets:
Workers compensation, pensions, and other benefits	21.6			16.2
Warranties and reserves	1.7			2.2
Tax loss carryforwards and credits	14.8			31.0
Inventory	22.7			10.8
Accrued liabilities and other	1.0			(2.7		)
Total deferred tax assets	61.8			57.5
Net deferred tax assets (liabilities) before valuation allowances	(47.3		)	(45.7		)
Valuation allowances	4.8			5.7
Adjusted net deferred tax assets (liabilities)	$	(52.1	)	$	(51.4	)

Change in unrecognized tax benefits

The change in unrecognized tax benefits for the years ended December 31, 2019, 2018, and 2017 was as follows:

	December 31,
	2019			2018			2017
	(in millions)
Beginning balance	$	0.5		$	1.3		$	7.4
Additions for tax positions related to the current year	—			—			—
Additions for tax positions of prior years	—			0.1			0.2
Reductions for tax positions of prior years	—			—			—
Settlements	—			—			(6.0		)
Expiration of statute of limitations	(0.5		)	(0.9		)	(0.3		)
Ending balance	$	—		$	0.5		$	1.3