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Note 11 - Income Taxes (Details Textual) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2020
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent | 21.00% |  |
Effective Income Tax Rate Reconciliation, Percent, Total | 25.00% | 28.00% |
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent | 4.00% | 5.00% |
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent, Total |  | 2.00% |
Proceeds from Income Tax Refunds |  |  | $ 21
State and Local Jurisdiction [Member] |  |  |
Operating Loss Carryforwards | $ 324 |  |
Minimum [Member] |  |  |
Income Taxes Paid, Net, Total | 170 |  |
Maximum [Member] |  |  |
Income Taxes Paid, Net, Total | $ 190 |  |

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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(2)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -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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