Debt - Holding Company Debt (Details) - Holding Company - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2022	Feb. 28, 2022
Debt Instrument [Line Items]
Gain (loss) on extinguishment of debt	$ (1)
6.750% senior unsecured notes due 2024
Debt Instrument [Line Items]
Debt face amount		$ 500
Interest rate on debt instrument		6.75%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details