Taxation (Provision For Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Tax Examination [Line Items]
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ 9,526	$ 6,485	$ 9,794
Current tax expense	1,595	1,081	1,359
Deferred tax expense	(1,084)	158	(90)
Provision for income taxes	511	1,239	1,269
Domestic Tax Authority [Member]
Income Tax Examination [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Domestic	44	234	349
Current tax expense	25	15	65
Deferred tax expense	(63)	34	(15)
Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Foreign	9,482	6,251	9,445
Current tax expense	1,570	1,066	1,294
Deferred tax expense	$ (1,021)	$ 124	$ (75)