Investments (Narrative) (Details)	12 Months Ended
	Dec. 31, 2023 Number
Investment In Organization [Line Items]
Number of private companies which entity has investments in common equity securities	2
Minimum [Member]
Investment In Organization [Line Items]
Treasury Bills, maturities	2 months
Maximum [Member]
Investment In Organization [Line Items]
Treasury Bills, maturities	3 months