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Note 11. Impairment Charges (Details) - USD ($)
3 Months Ended 12 Months Ended
Jun. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Restructuring Cost and Reserve [Line Items]        
Impaired Assets to be Disposed of by Method Other than Sale, Fair Value of Asset   $ 191,700,000    
Impaired Assets to be Disposed of by Method Other than Sale, Carrying Value of Asset   550,000,000.0    
Impairment of Long-Lived Assets Held-for-use   358,300,000    
Operating Lease, Impairment Loss   11,100,000    
Impairment of long-lived assets $ 369,400,000 396,400,000 $ 0 $ 0
Building [Member]        
Restructuring Cost and Reserve [Line Items]        
Impairment of long-lived assets   15,200,000    
Investments [Domain]        
Restructuring Cost and Reserve [Line Items]        
Impairment of long-lived assets   $ 11,800,000    
Net income (loss) attributable to noncontrolling interest [Member]        
Restructuring Cost and Reserve [Line Items]        
Impairment of long-lived assets $ 81,300,000