Income Taxes - Tax Credit Carryforwards (Details) $ in Millions	Dec. 31, 2021 USD ($)
Tax Credit Carryforward [Line Items]
Taxable income required for full realization of deferred tax assets	$ 1,500.0
Federal | Research and development tax credit carryforward
Tax Credit Carryforward [Line Items]
Tax credit carryforward	34.5
Federal | Tax credit that can be carried forward indefinitely
Tax Credit Carryforward [Line Items]
Tax credit carryforward	950.2
State | Research and development tax credit carryforward
Tax Credit Carryforward [Line Items]
Tax credit carryforward	$ 23.0