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Balance Sheet Details - Other Long-Term Liabilities (Details) - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Finance lease obligations $ 57.8 $ 54.0
Contractual obligations 12.6 12.6
Other liabilities 28.1 14.3
Total other long-term liabilities $ 98.5 $ 80.9