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Derivative Financial Instruments and Hedging Activities (Tables) | 12 Months Ended
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Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Derivative Instruments, Effect on Other Comprehensive Income (Loss) [Table Text Block] | The table below presents the effect of our derivative financial instruments in the consolidated statements of income and comprehensive income for the years ended December 31, 2020, 2019, and 2018:
(in millions) |  | Unrealized Gain (Loss) Recognized in Other Comprehensive Income (“OCI”) on Derivatives |  | Location of Gain (Loss) Reclassified from Accumulated OCI into Income |  | Amount of Gain (Loss) Reclassified from Accumulated OCI into Income |
Derivatives in Cash Flow Hedging Relationships |  | 2020 |  | 2019 |  | 2018 |  |  |  | 2020 |  | 2019 |  | 2018 |  |
Interest Rate Swaps |  | $ | — |  |  | $ | (13.0) |  |  | $ | 6.8 |  |  | Interest expense |  | $ | (1.3) |  |  | $ | 0.1 |  |  | 0.4 |  |  |

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- Definition Tabular disclosure of the effective portion of the gains and losses on derivative instruments designated (and non-derivative instruments) designated and qualifying in cash flow hedges and net investment hedges that was recognized in other comprehensive income (loss) during the current period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959 + Details
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