Note 9. Income Taxes Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Income Tax Disclosure [Abstract]

Unrecognized Tax Benefit Rollforward [Table Text Block]

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

	Year Ended December 31,
	2019			2018			2017
	(in millions)
Beginning balance	$	8.1		$	7.0		$	20.7
Additions for tax positions of prior years	—			3.0			4.5
Reductions for tax positions of prior years	—			(0.3		)	—
Settlements	(5.8		)	(1.5		)	(17.2		)
Expiration of statute of limitations	—			(0.1		)	(1.0		)
Ending balance	$	2.3		$	8.1		$	7.0

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

The components of the provision (benefit) for income taxes from continuing operations are as follows:

	Year Ended December 31,
	2019			2018			2017
	(in millions)
Current:
Federal	$	(6.0	)	$	(19.1	)	$	(61.1	)
State	6.6			(1.5		)	(1.1		)
Foreign	6.1			5.3			4.5
Total current	6.7			(15.3		)	(57.7		)
Deferred:
Federal
Effect of Tax Cuts and Jobs Act	—			(5.9		)	(476.2		)
Other	44.0			49.1			121.9
	44.0			43.2			(354.3		)
State	12.3			14.7			(2.8		)
Foreign	(1.5		)	—			—
Total deferred	54.8			57.9			(357.1		)
Provision (benefit)	$	61.5		$	42.6		$	(414.8	)

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

The following is a reconciliation between the statutory U.S. federal income tax rate and our 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	2.2		2.3		(1.9	)
Foreign branch taxes	1.2		2.9		—
Executive compensation limitations	1.2		0.9		—
Interest expense limitations from partially-owned subsidiaries	1.0		1.3		—
Noncontrolling interest in partially-owned subsidiaries	0.1		(0.5	)	(2.0	)
Equity compensation	(0.8	)	(1.4	)	0.8
Changes in state laws and apportionment	4.3		5.2		(0.5	)
Effect of Tax Cuts and Jobs Act	—		(3.9	)	(243.7	)
Changes in valuation allowances and reserves	—		1.6		1.9
Settlements with tax authorities	—		—		(2.1	)
Other, net	0.4		(1.3	)	0.3
Effective rate	30.6	%	28.1	%	(212.2	)%

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

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

	December 31,
	2019			2018
	(in millions)
Deferred tax liabilities:
Depreciation, depletion, and amortization	$	913.4		$	718.4
Partially-owned subsidiaries basis difference	144.7			131.7
Right-of-use assets	10.0			—
Total deferred tax liabilities	1,068.1			850.1
Deferred tax assets:
Workers compensation, pensions, and other benefits	3.1			5.7
Warranties and reserves	4.5			8.1
Equity items	46.1			34.0
Tax loss carryforwards and credits	229.0			65.5
Inventory	5.1			8.9
Accrued liabilities and other	9.7			9.1
Lease liabilities	10.0			—
Total deferred tax assets	307.5			131.3
Net deferred tax liabilities before valuation allowances	760.6			718.8
Valuation allowances	19.5			15.1
Net deferred tax liabilities before reserve for uncertain tax positions	780.1			733.9
Deferred tax assets included in reserve for uncertain tax positions	(1.0		)	(2.3		)
Adjusted net deferred tax liabilities	$	779.1		$	731.6