Annual report pursuant to Section 13 and 15(d)

Concentration Risk (Details)

v3.20.4
Concentration Risk (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Supplier Concentration Risk      
Concentration Risk [Line Items]      
Expenses incurred on hotel and restaurant services $ 59.0 $ 153.6 $ 153.7