Acquisitions, Dispositions And Other Adjustments (Narrative) (Details) $ in Millions			1 Months Ended	3 Months Ended					9 Months Ended		12 Months Ended
	Apr. 08, 2022 USD ($)	Jan. 14, 2022 license	Feb. 28, 2021 license	Sep. 30, 2022 USD ($)	Jun. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Retained Earnings
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Distribution of WarnerMedia				$ 0	$ 45,041		$ 0		$ (45,041)	$ 0
Additional Paid-In Capital
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Distribution of WarnerMedia				0			$ 0		(6,832)	$ 0
Adjustments to Additional Paid in Capital, Other					5,632
WarnerMedia [Member] | Additional Paid-In Capital
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Distribution of WarnerMedia				1,200
Discontinued Operations, Disposed of by Sale | WarnerMedia [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration received at closing	$ 40,400
Amount of transferred debt	$ 1,600
Spinoff | WarnerMedia [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Noncash or Part Noncash Divestiture, Type of Consideration Received	Each AT&T shareholder was entitled to receive 0.241917 shares of WBD common stock for each share of AT&T common stock held as of the record date
Cash proceeds received at closing	$ 38,800
Amount of transferred debt	$ 1,600
Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total assets, discontinued operations					121,100						$ 119,776
Liabilities					$ 70,600						33,555
Warner Bros. Discovery | Spinoff | WarnerMedia [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership percentage by parent	71.00%
3.45 GHz licenses
Business Combination Segment Allocation [Line Items]
Winning bidder, number of licenses | license		1,624
Total deposits to acquire intangible assets											123
Payments to acquire intangible assets						$ 8,956
Intangible Assets Acquired						$ 9,079
C-Band Licenses
Business Combination Segment Allocation [Line Items]
Winning bidder, number of licenses | license			1,621
Total deposits to acquire intangible assets												$ 550
Payments to acquire intangible assets								$ 22,856
Intangible Assets Acquired								$ 23,406
Satellite relocation costs				$ 98					$ 1,703		$ 1,605