Quarterly report pursuant to Section 13 or 15(d)

Assets and Liabilities Measured at Fair Value (Details)

v3.21.1
Assets and Liabilities Measured at Fair Value (Details) - USD ($)
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Dec. 18, 2020
1.75% Exchangeable Senior Debentures due 2046        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Interest rate (as a percent) 1.75%   1.75%  
1.25% Exchangeable Senior Debentures due 2050        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Interest rate (as a percent) 1.25%   1.25%  
2.75% Exchangeable Senior Debentures due 2050        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Interest rate (as a percent) 2.75%   2.75%  
Exchangeable senior debentures        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Change in fair value   $ 0    
Cumulative change $ 8,800,000      
Exchangeable senior debentures | 1.75% Exchangeable Senior Debentures due 2046 | Indemnification obligation        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Indemnity obligation recorded       $ 336,100,000
Exchangeable senior debentures | 1.75% Exchangeable Senior Debentures due 2046 | Indemnification obligation | LI LLC        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Interest rate (as a percent) 1.75%      
Exchangeable senior debentures        
Fair Value Measurement Inputs and Valuation Techniques [Line Items]        
Change in fair value $ 205,000