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Revenue Recognition (Tables)
12 Months Ended
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue
The following table presents our revenue disaggregated by major product and service lines (in millions):
Year Ended December 31,
202120202019
Product$1,255.0 $916.4 $788.5 
Service:
Security subscription1,125.0 918.7 750.8 
Technical support and other962.2 759.3 623.7 
Total service revenue2,087.2 1,678.0 1,374.5 
Total revenue$3,342.2 $2,594.4 $2,163.0