Quarterly report pursuant to Section 13 or 15(d)

Assets and Liabilities Measured at Fair Value (Details)

v3.21.2
Assets and Liabilities Measured at Fair Value (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 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%   1.75%  
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%   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%   2.75%  
Exchangeable senior debentures            
Fair Value Measurement Inputs and Valuation Techniques [Line Items]            
Change in fair value $ (4.7) $ 0.0 $ (4.5) $ 0.0    
Cumulative change     $ 4.1      
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%   1.75%      
Indemnity obligation recorded           $ 336.1