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Financial Instruments and Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Interest rate swaps | Interest expense
Derivative [Line Items]
Unrealized gains (losses) reclassified to income statement	$ 11.4	$ 3.4
Interest rate swap unrealized loss expected to be reclassified within next twelve months	10.3
Cross-currency swaps | Foreign currency and gains
Derivative [Line Items]
Unrealized gains (losses) reclassified to income statement	3.6	$ 5.5
Cross-currency swap unrealized gains expected to be reclassified within next twelve months	$ 1.0

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