Revenue - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Disaggregation of Revenue [Line Items]
Revenue	$ 29,298	$ 31,198	$ 90,695	$ 91,397
Spinoff
Disaggregation of Revenue [Line Items]
Revenue	0	1,731	0	5,270
Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	30,586	30,673	94,523	89,802
Operating Segments \| Total Residential Connectivity & Platforms Segment
Disaggregation of Revenue [Line Items]
Revenue	17,018	17,636	51,464	53,140
Operating Segments \| Total Residential Connectivity & Platforms Segment \| Domestic broadband
Disaggregation of Revenue [Line Items]
Revenue	6,241	6,550	18,859	19,878
Operating Segments \| Total Residential Connectivity & Platforms Segment \| Domestic wireless service
Disaggregation of Revenue [Line Items]
Revenue	1,050	915	3,035	2,647
Operating Segments \| Total Residential Connectivity & Platforms Segment \| Domestic wireless equipment
Disaggregation of Revenue [Line Items]
Revenue	475	331	1,296	917
Operating Segments \| Total Residential Connectivity & Platforms Segment \| International connectivity
Disaggregation of Revenue [Line Items]
Revenue	1,314	1,275	3,800	3,626
Operating Segments \| Total Residential Connectivity & Platforms Segment \| Video
Disaggregation of Revenue [Line Items]
Revenue	5,910	6,475	18,257	19,681
Operating Segments \| Total Residential Connectivity & Platforms Segment \| Advertising
Disaggregation of Revenue [Line Items]
Revenue	918	893	2,831	2,743
Operating Segments \| Total Residential Connectivity & Platforms Segment \| Other
Disaggregation of Revenue [Line Items]
Revenue	1,109	1,197	3,386	3,649
Operating Segments \| Total Business Services Connectivity Segment
Disaggregation of Revenue [Line Items]
Revenue	2,645	2,576	7,956	7,647
Operating Segments \| Total Media Segment
Disaggregation of Revenue [Line Items]
Revenue	5,359	4,744	18,330	13,813
Operating Segments \| Total Media Segment \| Other
Disaggregation of Revenue [Line Items]
Revenue	236	259	693	764
Operating Segments \| Total Media Segment \| Domestic advertising
Disaggregation of Revenue [Line Items]
Revenue	1,783	1,556	7,399	4,418
Operating Segments \| Total Media Segment \| Domestic distribution
Disaggregation of Revenue [Line Items]
Revenue	2,069	1,690	6,345	4,990
Operating Segments \| Total Media Segment \| International networks
Disaggregation of Revenue [Line Items]
Revenue	1,270	1,239	3,892	3,642
Operating Segments \| Total Studios Segment
Disaggregation of Revenue [Line Items]
Revenue	2,967	3,000	9,433	8,258
Operating Segments \| Total Studios Segment \| Other
Disaggregation of Revenue [Line Items]
Revenue	285	326	890	1,035
Operating Segments \| Total Studios Segment \| Content licensing
Disaggregation of Revenue [Line Items]
Revenue	1,553	2,035	6,326	6,014
Operating Segments \| Total Studios Segment \| Theatrical
Disaggregation of Revenue [Line Items]
Revenue	1,129	639	2,217	1,209
Operating Segments \| Total Theme Parks Segment
Disaggregation of Revenue [Line Items]
Revenue	2,597	2,717	7,341	6,943
Headquarters/Corporate and Other
Disaggregation of Revenue [Line Items]
Revenue	355	898	2,146	2,700
Eliminations
Disaggregation of Revenue [Line Items]
Revenue	$ (1,642)	$ (2,104)	$ (5,975)	$ (6,374)