Description of Business, Accounting Policies, and Supplemental Disclosures - Accounts Receivable, Net and Other (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net and other	$ 55,451	$ 52,253
Prepaid expenses and other current assets	6,300	5,400
Allowance for doubtful accounts	2,000	1,700	$ 1,400
Additions to allowance for doubtful accounts	1,900	1,900	1,600
Deductions to allowance for doubtful accounts	1,600	1,600	$ 1,300
Customer receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net and other	34,300	34,100
Vendor receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net and other	11,600	8,500
Other Receivables
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net and other	$ 3,400	$ 4,300