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Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Statement of Cash Flows [Abstract] |  |  |
Capitalized interest | $ 0.2 | $ 2.3 | $ 3.2
Tax refunds | $ 3.0 | $ 0.3 | $ 4.3

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