Income Taxes - Operating Loss And Credit Carryforwards (Details) $ in Millions	Dec. 31, 2021 USD ($)
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 2,100.0
Tax credit carryforwards	32.8
Domestic Tax Authority | Expire in 2022 - 2026
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	100.0
Tax credit carryforwards	1.7
Domestic Tax Authority | Expire in 2027-2031
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	600.0
Tax credit carryforwards	7.2
Domestic Tax Authority | Expire beginning in 2032
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	1,000.0
Tax credit carryforwards	23.9
Domestic Tax Authority | Carryforward indefinitely
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	400.0
Tax credit carryforwards	0.0
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	1,300.0
Tax credit carryforwards	15.9
State and Local Jurisdiction | Expire in 2022 - 2026
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	0.0
Tax credit carryforwards	0.0
State and Local Jurisdiction | Expire in 2027-2031
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	500.0
Tax credit carryforwards	0.0
State and Local Jurisdiction | Expire beginning in 2032
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	800.0
Tax credit carryforwards	0.0
State and Local Jurisdiction | Carryforward indefinitely
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	0.0
Tax credit carryforwards	$ 15.9