Compensation Related Costs, Retirement Benefits (Details) $ in Millions |
3 Months Ended | 9 Months Ended |
|---|---|---|
|
Sep. 30, 2020
USD ($)
|
Sep. 30, 2020
USD ($)
|
|
| Retirement Benefits [Abstract] | ||
| Liability, Retirement and Postemployment Benefits | $ 7.9 | $ 7.9 |
| Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | $ 0.1 | $ 0.1 |
| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of net periodic benefit cost (credit) for defined benefit plan. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of liability, recognized in statement of financial position, for pension, other postretirement and postemployment benefits. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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