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, 2024	Dec. 31, 2023	Dec. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in accumulated OCI	$ (1,857)
Distribution of WarnerMedia		$ 0	$ 0	$ (12)
Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on swaps		(1)	(6)	(3)
Gain (loss) on long-term debt		1	6	3
Cross-currency swaps
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on swaps		(1,347)	1,121	2,195
Gain (loss) on long-term debt		1,347	(1,121)	(2,195)
Gain (loss) recognized in accumulated OCI		501	1,126	297
Gain (loss) recognized in accumulated OCI		0	12	(1,119)
Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on swaps		0	12	(12)
Gain (loss) on long-term debt		0	(12)	12
Gain (loss) recognized in accumulated OCI		0	12	(12)
Gain (loss) recognized in accumulated OCI		0	0	3
Foreign exchange contracts | Other income (expense) - net
Derivative Instruments, Gain (Loss) [Line Items]
Amount reclassified from accumulated OCI into income		0	0	1
Interest rate locks | Other income (expense) - net
Derivative Instruments, Gain (Loss) [Line Items]
Amount reclassified from accumulated OCI into income		0	0	(45)
Interest rate locks | Interest income (expense)
Derivative Instruments, Gain (Loss) [Line Items]
Amount reclassified from accumulated OCI into income		$ (59)	$ (59)	$ (65)