Derivative Financial Instruments - Summary of Impact of Cross-Currency Swaps to AOCIL and Consolidated Statements of Operations (Detail) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Mar. 31, 2020	Dec. 31, 2019
Cross Currency Interest Rate Swap [Member]
Derivative [Line Items]
Gain/(Loss) Recognized in AOCI	$ 31.3	$ 19.8

Amount after tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss).

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