Leases (Lease Cost) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating Lease [Member]
Schedule of Operating and Finance Lease Cost [Line Items]
Operating lease cost	$ 2,296	$ 1,976	$ 1,776
Short-term and other (net of sublease rental income)	2,047	1,563	1,389
Total	4,343	3,539	3,165
Finance Lease [Member]
Schedule of Operating and Finance Lease Cost [Line Items]
Amortization of right of use assets	140	107	243
Interest on lease liabilities	149	140	210
Total	289	247	453
Drilling Rigs and Related Equipment [Member]
Schedule of Operating and Finance Lease Cost [Line Items]
Total	$ 1,195	$ 999	$ 908