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Debt And Related Expenses (Schedule of Net Financing Cost Components) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Debt Disclosure [Abstract]
Interest based on debt outstanding	$ 93	$ 98	$ 185	$ 203
Early retirement of debt	0	(10)	0	(30)
Interest income	(2)		(3)	(1)
Other	(7)	(8)	(13)	15
Total net financing costs	$ 84	$ 80	$ 169	$ 157

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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