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Fair Value - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Mar. 31, 2019
Jun. 30, 2018
Dec. 31, 2017
Jun. 30, 2019
Jun. 30, 2018
Sep. 25, 2018
Sep. 29, 2017
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]              
Land and Development impairments $ 13.0 $ 1.7 $ 27.6 $ 13.0 $ 29.3    
Maximum eligible receivables that may be sold           $ 550.0 $ 490.0
Estimated loss on sale of accounts receivable by quarter       $ 4.0      
Cash Receipts on Sold Trade Receivables From ASU 2016-15 [Member]              
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]              
Decrease in cash provided by operating activities         346.1    
Increase in cash provided by investing activities         $ 346.1    
Real Estate [Member]              
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]              
Impairment of intangible assets, finite-lived     4.0        
Mineral Rights [Member]              
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]              
Impairment of intangible assets, finite-lived     $ 23.6