Financing Arrangements - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2027	Dec. 31, 2026	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Jan. 31, 2022
Debt Instrument [Line Items]
Long-term debt, fair value						$ 34,900	$ 49,100
Unsecured senior notes, principal amount						6,000		$ 7,000
Proceeds from debt, net of issuance costs						5,900		6,900
Extinguishment of debt						6,000	3,500
Payment for debt extinguishment						6,600	4,000
Loss on debt redemption						(266)	(281)	0
Principal Value						38,234	43,095
Repayments of notes payable						4,800	2,000	2,800
Interest payments						1,400	1,500	$ 1,600
Available financial guarantees						$ 1,400
Forecast
Debt Instrument [Line Items]
Long-term debt, maturity, 2023					$ 3,900
Long-term debt, maturity, 2024				$ 2,900
Long-term debt, maturity, 2025			$ 1,800
Long-term debt, maturity, 2026		$ 2,000
Long-term debt, maturity, 2027	$ 2,000
Interest payment	$ 977	$ 1,000	$ 1,100	$ 1,100	$ 1,200
$5 Billion Maximum Borrowing Capacity
Debt Instrument [Line Items]
Long-term debt, term (in years)						5 years
Line of credit facility, maximum borrowing capacity									$ 5,000
Renewal period									1 year
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Borrowings outstanding						$ 0	$ 0