Stock-based Compensation (Summary of Restricted Stock Awards Activity) (Details) - Restricted Stock Units (RSUs) [Member] shares in Millions	12 Months Ended
	Dec. 31, 2023 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares outstanding at the beginning of the year, number of shares	2.0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	2.0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	(1.0)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested Options Forfeited, Number of Shares	0.0
Shares outstanding at the end of year, number of shares	3.0