Revenue Recognition (Deferred Contract Acquisition and Fulfillment Costs) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Deferred Acquisition Costs
Capitalized Contract Cost, Net [Abstract]
Total deferred costs	$ 6,562		$ 5,798
Deferred cost amortization	2,138	$ 2,266
Deferred Acquisition Costs | Prepaid and other current assets
Capitalized Contract Cost, Net [Abstract]
Total deferred costs	2,772		2,551
Deferred Acquisition Costs | Other Assets
Capitalized Contract Cost, Net [Abstract]
Total deferred costs	3,790		3,247
Deferred Acquisition Costs | Video Business Unit
Capitalized Contract Cost, Net [Abstract]
Deferred cost amortization		409
Deferred Fulfillment Costs
Capitalized Contract Cost, Net [Abstract]
Total deferred costs	6,741		6,748
Deferred cost amortization	2,000	3,285
Deferred Fulfillment Costs | Prepaid and other current assets
Capitalized Contract Cost, Net [Abstract]
Total deferred costs	2,489		2,600
Deferred Fulfillment Costs | Other Assets
Capitalized Contract Cost, Net [Abstract]
Total deferred costs	$ 4,252		$ 4,148
Deferred Fulfillment Costs | Video Business Unit
Capitalized Contract Cost, Net [Abstract]
Deferred cost amortization		$ 1,162