Taxation (Provision For Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Examination [Line Items]
Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ 9,816	$ 4,162	$ 5,249
Current tax expense	1,359	928	908
Deferred tax expense	(82)	(299)	(113)
Provision for income taxes	1,277	629	795
Domestic Tax Authority [Member]
Income Tax Examination [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Domestic	349	350	440
Current tax expense	65	52	29
Deferred tax expense	(15)	2	11
Foreign Tax Authority [Member]
Income Tax Examination [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Foreign	9,467	3,812	4,809
Current tax expense	1,294	876	879
Deferred tax expense	$ (67)	$ (301)	$ (124)