Investments (Fixed Maturity and Equity Securities Available-For-Sale - Narrative) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Dec. 31, 2012
Summary of Certain Fixed Maturity Securities
Gross Unrealized OTTI Loss	$ 110	$ 218	$ 361
Available-for-sale Securities, Debt Securities	367,056	350,187
Foreign corporate securities [Member]
Summary of Certain Fixed Maturity Securities
Gross Unrealized OTTI Loss	0	0
Available-for-sale Securities, Debt Securities	62,488	63,152
Gross Unrealized Gain	5,118	3,939
Non-income producing fixed maturity securities [Member]
Summary of Certain Fixed Maturity Securities
Available-for-sale Securities, Debt Securities	32	74
Gross Unrealized Gain	$ 18	$ 23