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Long-Term Debt (Tables)
3 Months Ended
Mar. 31, 2021
Debt Disclosure [Abstract]  
Schedule of Debt
At March 31, 2021 and December 31, 2020, long-term debt consisted of the following:
March 31, 2021December 31, 2020
 (In millions)
Series 2019-1 4.194% Fixed Rate Senior Secured Notes, Class A-2-I
$696.5 $698.3 
Series 2019-1 4.723% Fixed Rate Senior Secured Notes, Class A-2-II
597.0 598.5 
Series 2019-1 Variable Funding Senior Notes Class A-1, variable interest rate of 2.42% at December 31, 2020
— 220.0 
Debt issuance costs(9.1)(11.8)
Long-term debt, net of debt issuance costs1,284.4 1,505.0 
Current portion of long-term debt(13.0)(13.0)
Long-term debt$1,271.4 $1,492.0