XML 103 R66.htm IDEA: XBRL DOCUMENT v3.22.0.1
Investments (Narrative) (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Jun. 30, 2021
Jan. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Dec. 31, 2021
Dec. 31, 2020
Feb. 28, 2021
Investments [Abstract]              
Equity method investments     $ 69.5   $ 93.7 $ 69.5 $ 27.4
Payments to acquire equity method investments $ 23.8            
Equity method investment, ownership percentage 50.00%           50.00%
Equity method investment gain loss related to step up fair value $ 12.3            
Investments in marketable equity securities     62.4   5.8 62.4  
Proceeds from sale and maturity of marketable securities   $ 51.0          
Realized gain (loss) on marketable securities     37.4   (5.4)    
Unrealized gains on marketable equity securities         5.7 (45.4)  
Investments in non-marketable equity securities     $ 35.8   $ 37.7 35.8  
Impairment related to partial write-down of equity method investment           $ 20.0  
Unrealized gain       $ 14.9