Revenue Recognition (Contract Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Capitalized Contract Cost [Line Items]
Contract asset	$ 6,855	$ 6,518
Contract liability	4,272	3,994
Advanced billings and customer deposits	4,099	3,778
Prepaid Expenses and Other Current Assets
Capitalized Contract Cost [Line Items]
Contract asset balance - current portion	3,845	3,549
Other Current Liabilities
Capitalized Contract Cost [Line Items]
Advanced billings and customer deposits	$ 3,981	$ 3,666

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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