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Income Taxes - Textual (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Investments, Owned, Federal Income Tax Note [Line Items]      
Deferred tax assets, operating loss carryforwards, domestic $ 2,000.0    
Tax credit carryforward, amount 808.2    
Deferred tax assets, operating loss carryforwards, domestic, net 406.1    
Deferred tax assets, tax credit carryforwards, general business 139.1    
Deferred tax assets, operating loss carryforwards, foreign, net 165.8    
Deferred tax assets, operating loss carryforwards, state and local 93.4    
Deferred tax assets, operating loss carryforwards, foreign 2.8    
Deferred Tax Assets, Valuation Allowance (1,469.2) $ (1,420.9)  
Net unrecognized tax benefits 9.2 9.2  
Unrecognized tax benefits, gross interest and penalties (reversal)   6.2  
Unrecognized tax benefits, accrued gross interest and penalties $ 0.0 $ 0.0 $ 6.1
Pillar Two effective tax rate 15.00%    
Unrecognized Tax Benefits, Interest Tax Penalties And Interest Expense (Reversal)     $ 0.2
U.S. — federal      
Investments, Owned, Federal Income Tax Note [Line Items]      
Deferred Tax Assets, Valuation Allowance $ (1,000.0)    
Australia      
Investments, Owned, Federal Income Tax Note [Line Items]      
Deferred Tax Assets, Valuation Allowance $ (500.0)