Note 9. Income Taxes Income Taxes (Tables)

12 Months Ended

Dec. 31, 2020

Income Tax Disclosure [Abstract]

Unrecognized Tax Benefit Rollforward [Table Text Block]

The change in unrecognized tax benefits for the years ended December 31, 2020, 2019, and 2018 was as follows:

	Year Ended December 31,
	2020		2019		2018
	(in millions)
Beginning balance	$	2.3	$	8.1	$	7.0
Additions for tax positions of prior years	—		—		3.0
Reductions for tax positions of prior years	—		—		(0.3)
Settlements	—		(5.8)		(1.5)
Expiration of statute of limitations	—		—		(0.1)
Ending balance	$	2.3	$	2.3	$	8.1

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,
	2020		2019		2018
	(in millions)
Current:
Federal:
Effect of CARES Act	$	(373.3)	$	—	$	—
Other	(125.4)		(6.0)		(19.1)
	(498.7)		(6.0)		(19.1)
State	(0.1)		6.6		(1.5)
Foreign	4.3		6.1		5.3
Total current	(494.5)		6.7		(15.3)
Deferred:
Federal:
Effect of CARES Act	192.9		—		—
Other	23.4		44.0		43.2
	216.3		44.0		43.2
State	(0.4)		12.3		14.7
Foreign	10.2		(1.5)		—
Total deferred	226.1		54.8		57.9
Provision (benefit)	$	(268.4)	$	61.5	$	42.6

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,
	2020		2019		2018
Statutory rate	21.0	%	21.0	%	21.0	%
Effect of CARES Act	36.5		—		—
Impairment - noncontrolling interest in partially-owned subsidiaries	(3.5)		—		—
State taxes	1.1		2.2		2.3
Foreign branch taxes	(0.2)		1.2		2.9
Executive compensation limitations	(0.3)		1.2		0.9
Interest expense limitations from partially-owned subsidiaries	0.2		1.0		1.3
Noncontrolling interest in partially-owned subsidiaries	0.1		0.1		(0.5)
Changes in state laws and apportionment	(1.2)		4.3		5.2
Changes in valuation allowances and reserves	0.5		—		1.6
Equity compensation	—		(0.8)		(1.4)
Effect of Tax Cuts and Jobs Act	—		—		(3.9)
Other, net	0.1		0.4		(1.3)
Effective rate	54.3	%	30.6	%	28.1	%

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

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

	December 31,
	2020		2019
	(in millions)
Deferred tax liabilities:
Depreciation, depletion, and amortization	$	996.8	$	913.4
Partially-owned subsidiaries basis difference	139.9		144.7
Right-of-use assets	17.5		10.0
Total deferred tax liabilities	1,154.2		1,068.1
Deferred tax assets:
Workers compensation, pensions, and other benefits	27.1		3.1
Warranties and reserves	3.9		4.5
Equity items	9.5		46.1
Tax loss carryforwards and credits	62.8		229.0
Inventory	5.4		5.1
Accrued liabilities and other	5.3		9.7
Lease liabilities	22.9		10.0
Total deferred tax assets	136.9		307.5
Net deferred tax liabilities before valuation allowances	1,017.3		760.6
Valuation allowances	25.2		19.5
Net deferred tax liabilities before reserve for uncertain tax positions	1,042.5		780.1
Deferred tax assets included in reserve for uncertain tax positions	(1.0)		(1.0)
Adjusted net deferred tax liabilities	$	1,041.5	$	779.1