Accounting Policies and Supplemental Disclosures - Accounts Receivable, Net and Other (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net and other	$ 61,175	$ 55,451
Prepaid expenses and other current assets	6,800	6,300
Allowance for doubtful accounts	2,300	2,000
Customer receivables, net
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net and other	38,000	34,300
Vendor receivables, net
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net and other	12,500	11,600
Other receivables, net
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net and other	$ 3,800	$ 3,400