Financial Instruments - Long-Term Debt (Details) - USD ($) $ in Millions		Dec. 31, 2023		Dec. 31, 2022
Debt Instrument [Line Items]
Net fair value adjustments related to hedging and purchase accounting		$ 5		$ 11
Net unamortized discounts, premiums and debt issuance costs		(121)		(1)
Total long-term debt, carried at historical proceeds, as adjusted		61,538		32,884
Current portion of long-term debt, carried at historical proceeds, as adjusted (not included above (3.9% for 2023 and 3.7% for 2022))		$ 2,254		$ 2,560
Unsecured Debt [Member]
Debt Instrument [Line Items]
Interest rate, percentage		3.90%		3.70%
Total principal amount of long-term debt	[1]	$ 60,982		$ 32,080
Net fair value adjustments related to hedging and purchase accounting		1,039	[1]	959
Net unamortized discounts, premiums and debt issuance costs	[1]	(483)		(175)
Other long-term debt	[1]	0		20
Total long-term debt, carried at historical proceeds, as adjusted	[1]	61,538		32,884
Current portion of long-term debt, carried at historical proceeds, as adjusted (not included above (3.9% for 2023 and 3.7% for 2022))	[1]	2,254		$ 2,560
Unsecured Debt [Member] | Senior Unsecured Debt, Due 2024 [Member]
Debt Instrument [Line Items]
Interest rate, percentage				3.90%
Total principal amount of long-term debt	[1],[2]	$ 0		$ 2,250
Unsecured Debt [Member] | Senior Unsecured Debt, Due 2025 [Member]
Debt Instrument [Line Items]
Interest rate, percentage		3.90%		0.80%
Total principal amount of long-term debt	[1]	$ 3,750		$ 750
Unsecured Debt [Member] | Senior Unsecured Debt, Due 2026 [Member]
Debt Instrument [Line Items]
Interest rate, percentage		3.70%		2.90%
Total principal amount of long-term debt	[1]	$ 6,000		$ 3,000
Unsecured Debt [Member] | Senior Unsecured Debt, Due 2027 [Member]
Debt Instrument [Line Items]
Interest rate, percentage		2.10%		2.10%
Total principal amount of long-term debt	[1]	$ 1,029		$ 1,000
Unsecured Debt [Member] | Senior Unsecured Debt, Due 2028 [Member]
Debt Instrument [Line Items]
Interest rate, percentage		4.60%		4.80%
Total principal amount of long-term debt	[1]	$ 5,660		$ 1,660
Unsecured Debt [Member] | Senior Unsecured Debt, Due 2029 [Member]
Debt Instrument [Line Items]
Interest rate, percentage		3.50%		3.50%
Total principal amount of long-term debt	[1]	$ 1,750		$ 1,750
Unsecured Debt [Member] | Senior Unsecured Debt, Due 2030-2034 [Member]
Debt Instrument [Line Items]
Interest rate, percentage		4.10%		2.90%
Total principal amount of long-term debt	[1]	$ 12,000		$ 4,000
Unsecured Debt [Member] | Senior Unsecured Debt, Due 2035-2039 [Member]
Debt Instrument [Line Items]
Interest rate, percentage		5.80%		5.80%
Total principal amount of long-term debt	[1]	$ 8,048		$ 8,017
Unsecured Debt [Member] | Senior Unsecured Debt, Due 2040-2044 [Member]
Debt Instrument [Line Items]
Interest rate, percentage		4.10%		3.60%
Total principal amount of long-term debt	[1]	$ 7,995		$ 4,903
Unsecured Debt [Member] | Senior Unsecured Debt, Due 2045-2049 [Member]
Debt Instrument [Line Items]
Interest rate, percentage		4.10%		4.10%
Total principal amount of long-term debt	[1]	$ 3,500		$ 3,500
Unsecured Debt [Member] | Senior Unsecured Debt, Due 2049-2053 [Member]
Debt Instrument [Line Items]
Interest rate, percentage		5.00%		2.70%
Total principal amount of long-term debt	[1]	$ 11,250		$ 1,250

[1] Our long-term debt is generally redeemable by us at any time at varying redemption prices plus accrued and unpaid interest.

[2] Reclassified to the current portion of long-term debt.