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Financial Instruments - Consolidated Statements of Cash Flows Reconciliation (Details) - USD ($) $ in Millions	Sep. 30, 2025	Jun. 30, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Dec. 31, 2023	Sep. 30, 2023
Investments, Debt and Equity Securities [Abstract]
Cash and cash equivalents	$ 66,922		$ 78,779
Restricted cash included in accounts receivable, net and other	302		247
Restricted cash included in other assets	3,240		3,286
Total cash, cash equivalents, and restricted cash shown in the consolidated statements of cash flows	$ 70,464	$ 61,453	$ 82,312	$ 78,677	$ 71,673	$ 73,890	$ 50,081