Revenue Recognition (Deferred Contract Acquisition and Fulfillment Costs) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
Deferred Acquisition Costs
Capitalized Contract Cost, Net [Abstract]
Total deferred costs	$ 8,497		$ 8,328
Deferred cost amortization	1,006	$ 906
Deferred Acquisition Costs \| Balance Sheet Location [Axis]: us-gaap:OtherAssets
Capitalized Contract Cost, Net [Abstract]
Total deferred costs	4,986		4,778
Deferred Acquisition Costs \| Balance Sheet Location [Axis]: us-gaap:PrepaidExpenseAndOtherAssetsCurrent
Capitalized Contract Cost, Net [Abstract]
Total deferred costs	3,511		3,550
Deferred Fulfillment Costs
Capitalized Contract Cost, Net [Abstract]
Total deferred costs	4,592		4,726
Deferred cost amortization	480	$ 595
Deferred Fulfillment Costs \| Balance Sheet Location [Axis]: us-gaap:OtherAssets
Capitalized Contract Cost, Net [Abstract]
Total deferred costs	2,896		2,864
Deferred Fulfillment Costs \| Balance Sheet Location [Axis]: us-gaap:PrepaidExpenseAndOtherAssetsCurrent
Capitalized Contract Cost, Net [Abstract]
Total deferred costs	$ 1,696		$ 1,862