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Employee Benefit Plans (Reconciliation of the Beginning and Ending Balances for Investments) (Details) - Level 3 - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Change in Plan Assets:
Beginning balance	$ 1.6	$ 1.6
Actual return on plan assets held	0.7
Ending balance	$ 2.3	$ 1.6

Amount of asset segregated and restricted to provide benefit under defined benefit plan. Asset includes, but is not limited to, stock, bond, other investment, earning from investment, and contribution by employer and employee.

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