Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Schedule of Investments in Unrealized Loss Position (Details)

v3.21.2
Fair Value Measurements - Schedule of Investments in Unrealized Loss Position (Details) - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
Estimated Fair Value    
Securities with a loss shorter than 12 months $ 7.0 $ 0.0
Securities with a loss longer than 12 months 0.0 6.0
Unrealized Losses    
Securities with a loss shorter than 12 months 0.2 0.0
Securities with a loss longer than 12 months $ 0.0 $ 0.3