Series A Convertible Preferred Stock (Details) - Series A Convertible Preferred Stock $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($) $ / shares Rate shares	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) $ / shares Rate shares	Jun. 30, 2022 USD ($)	Dec. 31, 2022 shares
Class of Stock [Line Items]
Dividend rate | Rate	5.50%		5.50%
Dividend rate for preferred shares; accrued but unpaid dividend	8.00%		8.00%
Cash dividends paid | $	$ 4	$ 4	$ 8	$ 8
Conversion price per share at option of holder (in dollars per share) | $ / shares	$ 30.00		$ 30.00
Conversion rate per preferred share			33.333
Financial instruments subject to redemption, settlement terms, maximum number of shares (in shares) | shares	9.2		9.2		9.2