Taxation (Provision For Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Examination [Line Items]
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ 6,568	$ 9,816	$ 4,162
Current tax expense	1,081	1,359	928
Deferred tax expense	174	(82)	(299)
Provision for income taxes	1,255	1,277	629
Domestic Tax Authority [Member]
Income Tax Examination [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Domestic	234	349	350
Current tax expense	15	65	52
Deferred tax expense	34	(15)	2
Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Foreign	6,334	9,467	3,812
Current tax expense	1,066	1,294	876
Deferred tax expense	$ 140	$ (67)	$ (301)