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BALANCE SHEET DETAILS AND OTHER FINANCIAL INFORMATION - Prepaids and Other Current Assets (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Prepaid taxes	$ 72.4	$ 28.9
Equity investments	0.0	60.1
Net investment in sales-type leases – short-term	79.0	81.1
Other prepaids and other current assets	126.4	97.4
Prepaids and other current assets	$ 277.8	$ 267.5

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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