Derivative Financial Instruments (Schedule Of Derivative Financial Instruments Included In The Consolidated Balance Sheets) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Derivatives Fair Value [Line Items]
Gross Fair Value	$ (606)	$ (569)
Net Fair Value	(606)	(569)
Short-term Derivative Asset [Member]
Derivatives Fair Value [Line Items]
Gross Fair Value	37	6
Amounts Netted	(26)	(4)
Net Fair Value	$ 11	2
Balance Sheet Classification	Other current assets
Long-term Derivative Asset [Member]
Derivatives Fair Value [Line Items]
Gross Fair Value	$ 31	6
Amounts Netted	(1)
Net Fair Value	$ 30	6
Balance Sheet Classification	Other long-term assets
Short-term Derivative Liability [Member]
Derivatives Fair Value [Line Items]
Gross Fair Value	$ (672)	(579)
Amounts Netted	26	4
Net Fair Value	$ (646)	(575)
Balance Sheet Classification	Other current liabilities
Long-term Derivative Liability [Member]
Derivatives Fair Value [Line Items]
Gross Fair Value	$ (2)	(2)
Amounts Netted	1
Net Fair Value	$ (1)	$ (2)
Balance Sheet Classification	Other long-term liabilities