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Income Tax Matters - Income Tax Benefit (Provision) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Income Tax Disclosure [Abstract] |  |  |  |
Domestic | $ 16.7 | $ (1.0) | $ 17.3 | $ (10.6)
Foreign | (1.2) | (0.3) | (1.5) | (0.3)
Total | $ 15.5 | $ (1.3) | $ 15.8 | $ (10.9)

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- Definition Amount of current and deferred federal income tax expense (benefit) attributable to income (loss) from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32672-109319 Reference 2: 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)(i)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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