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Credit Losses (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2020
Jun. 30, 2021
Dec. 31, 2020
Allowance for Credit Losses [Roll Forward]      
Balance at beginning of period   $ 1.7 $ 6.8
Current period provision   1.2 1.2
Balance at end of period   2.0 1.7
Trade Accounts Receivable      
Allowance for Credit Losses [Roll Forward]      
Write-offs - trade accounts receivable   $ (0.9) (0.7)
Notes and Other Receivables      
Allowance for Credit Losses [Roll Forward]      
Write-offs - trade accounts receivable $ (5.6)   $ (5.6)