Fair Value Measurements (Summary Of Quantitative Information About Level 3 Fair Value Measurements) (Details) - Private Equity Investments [Member]	9 Months Ended
	Sep. 30, 2023
Fair Value Assets Measured on Recurring Basis [Line Items]
Valuation Technique	Market comparable companies
Minimum [Member]
Fair Value Assets Measured on Recurring Basis [Line Items]
EBITDA multiple	4.0
Maximum [Member]
Fair Value Assets Measured on Recurring Basis [Line Items]
EBITDA multiple	6.0
Weighted Average [Member]
Fair Value Assets Measured on Recurring Basis [Line Items]
EBITDA multiple	5.1	[1]

[1] * Unobservable inputs were weighted by the relative fair value of the instruments.