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ACCOUNTING POLICIES (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Contract Balances
Accounts receivable	$ 26.8	$ 30.3
Unbilled fee revenue	8.7	7.7
Unearned revenue	$ 4.0	$ 1.4

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Amount, after allowance for credit loss, of right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

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Unbilled amounts due for services rendered or to be rendered, actions taken or to be taken, or a promise to refrain from taking certain actions in accordance with the terms of a legally binding agreement between the entity and, at a minimum, one other party. An example would be amounts associated with contracts or programs where the recognized revenue for performance thereunder exceeds the amounts billed under the terms thereof as of the date of the balance sheet.

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