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5. Long-Term Debt
 9 Months Ended
Sep. 30, 2021
Debt Disclosure [Abstract]  
Long-term Debt .    LONG-TERM DEBT
The principal components of long-term debt are as follows (in millions):
September 30,
2021		December 31,
2020
Finance leases and other debt$12.3 $14.1 
Less current maturities(1.7)(1.8)
Long-term debt$10.6 $12.3