Preferred Stock (Details) $ / shares in Units, $ in Millions		12 Months Ended
		Dec. 31, 2022 USD ($) day vote class $ / shares shares	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Class of Stock [Line Items]
Number of classes of stock outstanding | class		1
Preferred stock, carrying value		$ 214	$ 214
Preferred stock, annual dividend	[1]	$ 14	$ 14	$ 14
Initial conversion price per share of common stock (in dollars per share) | $ / shares		$ 26.70
Minimum number of trading days C/S close price must exceed conversion price to trigger Pfd Stock conversion | day		20
Number of trading days used for measurement | day		30
Common Stock
Class of Stock [Line Items]
Preferred stock converted into common shares (in shares) | shares		37.4532
Preferred stock conversion to common stock, shares (in shares) | shares		6,742,000
Maximum common stock closing price, triggering conversion (in dollars per share) | $ / shares		$ 39.00
Maximum common stock closing price, percent, triggering conversion		146.10%
Series A
Class of Stock [Line Items]
Preferred stock converted into common shares (in shares) | shares		180,000
Preferred stock, aggregate liquidation value		$ 180
Preferred stock, carrying value		$ 214
Preferred stock, dividend rate, percentage		8.00%
Preferred stock, annual dividend		$ 14
Common stock, capital shares reserved for future issuance (in shares) | shares		6,742,000
Number of votes per ten shares | vote		1
Preferred stock, number of votes if converted | vote		674,157

[1] Cash dividends declared on preferred stock for 2022, 2021 and 2020 were $20 per share on a quarterly basis and $80 per share on an annual basis.