Fair Value Measurements And Disclosure (Effect Of Derivatives On The Consolidated Statements Of Income) (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) recognized in accumulated OCI	$ (1,857)
Distribution of WarnerMedia		$ (12)	$ 0	$ 0
Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on swaps		(3)	(4)	(6)
Gain (Loss) on long-term debt		3	4	6
Cross-currency swaps
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on swaps		2,195	(91)	0
Gain (Loss) on long-term debt		(2,195)	91	0
Gain (Loss) recognized in accumulated OCI		297	(17)	0
Gain (Loss) recognized in accumulated OCI		(1,119)	(873)	(378)
Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on swaps		(12)	0	0
Gain (Loss) on long-term debt		12	0	0
Gain (Loss) recognized in accumulated OCI		(12)	0	0
Gain (Loss) recognized in accumulated OCI		3	(17)	3
Foreign exchange contracts | Other income (expense) - net
Derivative Instruments, Gain (Loss) [Line Items]
Amount reclassified from accumulated OCI into income		1	1	(3)
Interest rate locks
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) recognized in accumulated OCI		0	0	(648)
Interest rate locks | Other income (expense) - net
Derivative Instruments, Gain (Loss) [Line Items]
Amount reclassified from accumulated OCI into income		(45)	0	0
Interest rate locks | Interest income (expense)
Derivative Instruments, Gain (Loss) [Line Items]
Amount reclassified from accumulated OCI into income		$ (65)	$ (92)	$ (84)