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Note 9. Income Taxes Income Taxes (Tables) | 12 Months Ended
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Dec. 31, 2022
Income Tax Disclosure [Abstract] |
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,
| 2022 |  | 2021 |  | 2020
| (in millions)
Current: |  |  |  |  |
Federal: |  |  |  |  |
Effect of CARES Act | $ | (0.5) |  |  | $ | 2.1 |  |  | $ | (373.3) |
Other | 2.1 |  |  | (3.0) |  |  | (142.1) |
| 1.6 |  |  | (0.9) |  |  | (515.4) |
State | 3.5 |  |  | (0.6) |  |  | (1.5) |
Foreign | 7.8 |  |  | 4.3 |  |  | 4.3 |
Total current | 12.9 |  |  | 2.8 |  |  | (512.6) |
Deferred: |  |  |  |  |
Federal: |  |  |  |  |
Effect of CARES Act | — |  |  | 0.4 |  |  | 192.9 |
Other | 14.5 |  |  | 10.4 |  |  | 31.3 |
| 14.5 |  |  | 10.8 |  |  | 224.2 |
State | 0.4 |  |  | 2.4 |  |  | 4.1 |
Foreign | (0.2) |  |  | (0.1) |  |  | 10.2 |
Total deferred | 14.7 |  |  | 13.1 |  |  | 238.5 |
Provision (benefit) | $ | 27.6 |  |  | $ | 15.9 |  |  | $ | (274.1) |
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,
| 2022 |  | 2021 |  | 2020
Statutory rate | 21.0 | % |  | 21.0 | % |  | 21.0 | %
Foreign branch taxes | 2.1 |  |  | 3.0 |  |  | (0.2) |
State taxes | 1.7 |  |  | 3.0 |  |  | 1.1 |
Executive compensation limitations | 1.3 |  |  | 1.8 |  |  | (0.3) |
Noncontrolling interest in partially-owned subsidiaries | (2.1) |  |  | — |  |  | 0.1 |
Equity compensation | (1.1) |  |  | (4.0) |  |  | — |
Changes in valuation allowance and reserves | (0.9) |  |  | (4.3) |  |  | 0.7 |
Effect of CARES Act | (0.5) |  |  | 4.5 |  |  | 34.4 |
Changes in state laws and apportionment | (0.5) |  |  | 0.3 |  |  | (1.4) |
Foreign rate differential | — |  |  | 1.4 |  |  | (0.1) |
Nondeductible excise tax | — |  |  | 1.3 |  |  | — |
Nondeductible compensation | — |  |  | 1.2 |  |  | (0.2) |
Impairment - noncontrolling interest in partially-owned subsidiaries | — |  |  | — |  |  | (3.3) |
Interest expense limitations from partially-owned subsidiaries | — |  |  | — |  |  | 0.2 |
Other, net | 0.8 |  |  | (0.4) |  |  | 0.2 |
Effective rate | 21.8 | % |  | 28.8 | % |  | 52.2 | %
Schedule of Deferred Tax Assets and Liabilities [Table Text Block] | The components of deferred tax liabilities and assets are as follows:
| December 31,
| 2022 |  | 2021
| (in millions)
Deferred tax liabilities: |  |  |
Depreciation, depletion, and amortization | $ | 1,072.6 |  |  | $ | 1,032.2 |
Partially-owned subsidiaries basis difference | 134.3 |  |  | 139.2 |
Right-of-use assets | 20.9 |  |  | 18.7 |
Equity items | 4.8 |  |  | — |
Accrued liabilities and other | 3.0 |  |  | 1.9 |
Total deferred tax liabilities | 1,235.6 |  |  | 1,192.0 |
Deferred tax assets: |  |  |
Workers compensation, pensions, and other benefits | 27.4 |  |  | 28.7 |
Interest expense | 31.3 |  |  | — |
Warranties and reserves | 2.8 |  |  | 7.3 |
Equity items | — |  |  | 5.9 |
Tax loss carryforwards and credits | 40.4 |  |  | 38.4 |
Inventory | 3.6 |  |  | 6.0 |
Lease liabilities | 25.8 |  |  | 24.4 |
Total deferred tax assets | 131.3 |  |  | 110.7 |
Net deferred tax liabilities before valuation allowances | 1,104.3 |  |  | 1,081.3 |
Valuation allowances | 29.5 |  |  | 24.4 |
Net deferred tax liabilities before reserve for uncertain tax positions | 1,133.8 |  |  | 1,105.7 |
Deferred tax assets included in reserve for uncertain tax positions | (0.7) |  |  | (1.1) |
Net deferred tax liability | $ | 1,133.1 |  |  | $ | 1,104.6 |
Unrecognized Tax Benefit Rollforward [Table Text Block] | The change in unrecognized tax benefits was as follows:
| Year Ended December 31,
| 2022 |  | 2021 |  | 2020
| (in millions)
Beginning balance | $ | 2.3 |  |  | $ | 2.3 |  |  | $ | 2.3 |
Additions for tax positions related to the current year | 1.1 |  |  | — |  |  | — |
Additions for tax positions of prior years | 1.7 |  |  | — |  |  | — |
Reductions for tax positions of prior years | — |  |  | — |  |  | — |
Settlements | — |  |  | — |  |  | — |
Expiration of statute of limitations | (1.3) |  |  | — |  |  | — |
Ending balance | $ | 3.8 |  |  | $ | 2.3 |  |  | $ | 2.3 |

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- Definition Tabular disclosure of the components of income tax expense attributable to continuing operations for each year presented including, but not limited to: current tax expense (benefit), deferred tax expense (benefit), investment tax credits, government grants, the benefits of operating loss carryforwards, tax expense that results from allocating certain tax benefits either directly to contributed capital or to reduce goodwill or other noncurrent intangible assets of an acquired entity, adjustments of a deferred tax liability or asset for enacted changes in tax laws or rates or a change in the tax status of the entity, and adjustments of the beginning-of-the-year balances of a valuation allowance because of a change in circumstances that causes a change in judgment about the realizability of the related deferred tax asset in future years. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319 + Details
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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32537-109319 + Details
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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319 + Details
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