XML 104 R86.htm IDEA: XBRL DOCUMENT v3.20.4
Employee Benefit Plans - Summary of Net Periodic Pension Cost (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]      
Service cost $ 10.9 $ 9.4 $ 9.6
Interest cost 4.7 5.0 4.7
Expected return on plan assets (6.3) (6.0) (6.1)
Curtailment gain (1.6) 0.0 (0.3)
Actuarial losses 4.0 15.6 6.1
Total net periodic pension cost $ 11.7 $ 24.0 $ 14.0
Discount rate used for net periodic pension costs 1.43% 1.74% 1.66%
Discount rate used for pension benefit obligations 1.31% 1.43% 1.74%
Expected return on plan assets 3.06% 3.23% 3.18%
Rate of compensation increase 3.26% 3.07% 3.22%