Sale of Accounts Receivable (Narrative) (Details) $ in Millions, € in Billions	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2023 EUR (€)
Sale of Accounts Receivable [Line Items]
Proceeds from the collection of receivables sold	$ 53,600	$ 56,900	$ 47,300
Loss on transfer of accounts receivables to purchasers	56	21	11
Lines of credit	13,200
Transfer of Financial Assets Accounted for as Sales, Amount Derecognized	1,600	2,600
Amount of receivables sold	54,800	59,000	$ 50,300
Accounts Receivable, after Allowance for Credit Loss, Current	4,232	4,926
Asset Pledged as Collateral without Right
Sale of Accounts Receivable [Line Items]
Accounts Receivable, after Allowance for Credit Loss, Current	1,100	$ 600
Accounts Receivable Securitization Facility [Member]
Sale of Accounts Receivable [Line Items]
Lines of credit	3,000
Program [Member] | Accounts Receivable Securitization Facility [Member]
Sale of Accounts Receivable [Line Items]
Lines of credit	1,900
Second Program [Member] | Accounts Receivable Securitization Facility [Member]
Sale of Accounts Receivable [Line Items]
Lines of credit	$ 1,100			€ 1.0