Revenue Recognition (Contract Assets and Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Capitalized Contract Cost [Line Items]
Contract asset	$ 5,960	$ 5,512
Contract liability	3,913	4,170
Contract liability balance - current portion	3,703	3,918
Prepaid and other current assets
Capitalized Contract Cost [Line Items]
Contract asset balance - current portion	3,283	2,941
Advanced billings and customer deposits
Capitalized Contract Cost [Line Items]
Contract liability balance - current portion	$ 3,598	$ 3,816

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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