Revenue Recognition (Deferred Contract Acquisition and Fulfillment Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Deferred Acquisition Costs
Capitalized Contract Cost, Net [Abstract]
Total deferred costs	$ 7,416	$ 7,310
Deferred cost amortization	3,667	3,476
Deferred Acquisition Costs | Prepaid and other current assets
Capitalized Contract Cost, Net [Abstract]
Total deferred costs	3,239	3,233
Deferred Acquisition Costs | Other Assets
Capitalized Contract Cost, Net [Abstract]
Total deferred costs	4,177	4,077
Deferred Fulfillment Costs
Capitalized Contract Cost, Net [Abstract]
Total deferred costs	5,390	6,183
Deferred cost amortization	2,525	2,700
Deferred Fulfillment Costs | Prepaid and other current assets
Capitalized Contract Cost, Net [Abstract]
Total deferred costs	2,101	2,340
Deferred Fulfillment Costs | Other Assets
Capitalized Contract Cost, Net [Abstract]
Total deferred costs	$ 3,289	$ 3,843