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Commitments and Contingencies - License Agreements (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Royalty expense in cost of revenue      
Total cost of revenue $ 1,047.7 $ 1,077.3 $ 995.6
License Agreements      
Royalty expense in cost of revenue      
Total cost of revenue $ 8.4 $ 2.6 $ 3.7