Investments (Schedule Of Other Investments) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Schedule of Cost-method Investments [Line Items]
Other investments - Total at Fair Value	$ 2,976	$ 2,716
Other investments - Total at Cost	2,671	2,465
Fair Value
Schedule of Cost-method Investments [Line Items]
Investment funds	428	395
Limited partnerships	576	531
Partially owned investment companies	1,284	1,186
Life insurance policies	180	148
Policy loans	179	164
Trading securities	276	243
Other	53	49
Other investments - Total at Fair Value	2,976	2,716
Cost
Schedule of Cost-method Investments [Line Items]
Investment funds	278	278
Limited partnerships	424	398
Partially owned investment companies	1,284	1,187
Life insurance policies	180	148
Policy loans	179	164
Trading securities	273	242
Other	53	48
Other investments - Total at Cost	$ 2,671	$ 2,465