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Income Tax Matters - Income Tax Benefit (Provision) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Federal income tax (expense) benefit |  |  |
Current federal tax (expense) benefit |  | $ 6.1 | $ 5.7
Deferred federal income tax (expense) benefit | $ 2.1 | (18.8) | (19.6)
Federal benefit (expense) applied to decrease (increase) Other comprehensive income | 3.7 | 5.1 | 2.7
Federal income tax benefit (provision) | 5.8 | (7.6) | (11.2)
Foreign income tax (expense) benefit |  |  |
Current foreign tax (expense) benefit | (2.4) | (0.4) | (1.1)
Deferred foreign income tax (expense) benefit | 0.5 | (0.1) | (0.3)
Foreign benefit (expense) applied to decrease (increase) Other comprehensive income | 0.3 | (0.1) | (0.1)
Foreign income tax benefit (provision) | (1.6) | (0.6) | (1.5)
State income tax (expense) benefit |  |  |
Current state tax (expense) benefit | (3.5) | (0.6) | (1.8)
Deferred state income tax (expense) benefit | 4.2 | (2.3) | (4.5)
State benefit (expense) applied to decrease (increase) Other comprehensive income | 0.6 | 1.1 | 0.6
State income tax benefit (provision) | 1.3 | (1.8) | (5.7)
Total income tax (expense) benefit |  |  |
Current tax (expense) benefit | (5.9) | 5.1 | 2.8
Deferred income tax (expense) benefit | 6.8 | (21.2) | (24.4)
Benefit (expense) applied to decrease (increase) Other comprehensive income | 4.6 | 6.1 | 3.2
Income tax benefit (provision) | $ 5.5 | $ (10.0) | $ (18.4)

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- Definition Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(1)(Note 1)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.7) -URI http://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319 + Details
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