Annual report pursuant to Section 13 and 15(d)

NATURE OF BUSINESS AND ACCOUNTING POLICIES - Accrued Residual Commissions (Details)

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NATURE OF BUSINESS AND ACCOUNTING POLICIES - Accrued Residual Commissions (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Accounting Policies [Abstract]      
Residual commission expenses $ 240.2 $ 213.8 $ 230.2