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Capitalized Interest (Tables)
6 Months Ended
Mar. 31, 2021
Capitalized Interest [Abstract]  
Capitalized Interest Costs [Table Text Block]
The following table summarizes the Company’s interest costs incurred, capitalized and expensed during the three and six months ended March 31, 2021 and 2020.
Three Months Ended March 31,Six Months Ended March 31,
 2021202020212020
 (In millions)
Capitalized interest, beginning of period$51.0 $29.8 $48.7 $23.7 
Interest incurred11.5 10.6 23.0 20.5 
Interest charged to cost of sales(8.2)(2.5)(17.4)(6.3)
Capitalized interest, end of period$54.3 $37.9 $54.3 $37.9