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Debt And Related Expenses (Schedule of Net Financing Cost Components) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Debt Disclosure [Abstract]
Interest based on debt outstanding	$ 93	$ 65	$ 296	$ 195
Gain on early retirement of debt			(30)
Interest income	(1)	(5)	(2)	(12)
Other	(6)	6	(21)	17
Total net financing costs	$ 86	$ 66	$ 243	$ 200

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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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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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