XML 84 R71.htm IDEA: XBRL DOCUMENT v3.21.2
Investments in and Advances to Joint Ventures - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Schedule Of Equity Method Investments [Line Items]          
Letters of credit outstanding amount $ 221.2   $ 221.2   $ 193.1
Write-down on unconsolidated joint venture 5.5   10.6    
Decrease in operating income 5.5   10.6    
Decrease in net income net of tax $ 4.1   $ 7.9    
Decrease in earnings per share diluted $ 0.04   $ 0.07    
Unconsolidated Joint Ventures          
Schedule Of Equity Method Investments [Line Items]          
Net distributions from (contributions to) unconsolidated joint ventures $ (7.3) $ 11.2 $ (0.5) $ 23.2  
Consolidated Joint Ventures          
Schedule Of Equity Method Investments [Line Items]          
Letters of credit outstanding amount $ 75.0   $ 75.0   $ 59.3