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Unrecognized Tax Benefits and Tax Reform (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] |  |  |
Balance at January 1 | $ 7.0 | $ 5.3 | $ 4.3
Additions based on tax positions related to the current year | 0.0 | 0.4 | 0.0
Additions for tax positions of prior years | 0.8 | 1.6 | 1.4
Reductions for tax positions of prior years | 0.0 | 0.0 | 0.0
Reductions for expirations of statute of limitations | (0.9) | (0.3) | (0.4)
Settlements | 0.0 | 0.0 | 0.0
Balance at December 31 | 6.9 | 7.0 | 5.3
Unrecognized tax benefits, accumulated interest and penalties | 9.1 | 8.4 | 7.5
Deferred tax assets related to unrecognized tax benefits | 3.6 | 3.4 | 2.8
Net unrecognized tax benefits, associated interest, penalties and deferred tax asset that if resolved would impact effective tax rate | 12.4 | 12.0 | 10.0
Recognized interest and penalties | $ 0.6 | $ 0.7 | $ 0.7

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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 10B -URI http://asc.fasb.org/extlink&oid=123427490&loc=SL37586934-109318 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=121826272&loc=SL6600010-109319 + Details
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