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Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (Parenthetical) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Sep. 30, 2019 | Jun. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Statement of Stockholders' Equity [Abstract] |  |  |  |  |  |  |
Gain (Loss) on cash flow hedges, tax benefit (expense) | $ (0.1) | $ 0.5 | $ 1.8 | $ 0.4 | $ 0.3 | $ 2.2 | $ 0.7

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- Definition Amount, after reclassification, of tax expense (benefit) for gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness, attributable to parent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e640-108580 + Details
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