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Senior Notes (Schedule Of Interest Expense Incurred In Connection With Senior Notes) (Details) - Senior Notes [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Debt Instrument [Line Items]
Interest expense incurred	$ 21,588	$ 13,673
4.868% Senior Notes due 6/1/2044 [Member]
Debt Instrument [Line Items]
Interest expense incurred	$ 4,868	4,868
Debt instrument, stated interest rate	4.868%
3.5% Senior Notes due 10/15/2050 [Member]
Debt Instrument [Line Items]
Interest expense incurred	$ 8,807	8,805
Debt instrument, stated interest rate	3.50%
3.125% Senior Notes due 10/15/2052 [Member]
Debt Instrument [Line Items]
Interest expense incurred	$ 7,913
Debt instrument, stated interest rate	3.125%

X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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