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, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]
Expected tax provision at Swiss statutory rate	$ 331	$ 233	$ 160
Taxes on earnings subject to rates other that Swiss statutory rate	124	129	323
Tax exempt interest and dividends received deduction, net of proration	(27)	(24)	(21)
Net witholding taxes	27	23	19
Favorable resolution of prior years' tax matters and closing of statutes of limitations	(5)	(124)	0
Change in valuation allowance	4	4	(2)
Other	26	29	23
Provision for income taxes	$ 480	$ 270	$ 502