Taxation (Reconciliation Of The Difference Between The Provision for Income Taxes and the Expected Tax Provision at Swiss Statutory Income Tax Rate) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Expected tax provision at Swiss statutory tax rate	$ 1,291	$ 1,934	$ 880
Taxes on earnings subject to rate other than Swiss statutory rate	(244)	(740)	(337)
Net withholding taxes	75	78	67
Other	133	5	19
Provision for income taxes	$ 1,255	$ 1,277	$ 629