Quarterly report pursuant to Section 13 or 15(d)

Employee Defined Benefit Retirement Plans (Details)

v3.21.2
Employee Defined Benefit Retirement Plans (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Jul. 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]            
Retirement plan liability           $ 7.9
Net periodic benefit cost $ 0.1 $ 0.1 $ 0.3 $ 0.1    
Other Long-term Investments            
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]            
Defined benefit obligation $ 6.3   $ 6.3   $ 6.4