Fair Value of Assets and Liabilities (Narrative) (Details) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Separate Account assets transferred from Level 2 to Level 1	$ 0	$ 933,000,000
Total commercial mortgage and other loans, net of valuation allowance	413,330,000	398,991,000
Other Long-Term Investments	110,855,000	60,585,000
Other liabilities	95,492,000	113,125,000
Embedded Derivative Fair Value of Embedded Derivative	2,317,000,000	778,000,000
Embedded Derivative Gross Asset	94,000,000	245,000,000
Embedded Derivative Gross Liability	2,411,000,000	1,023,000,000
Fair Value of Level 3 Derivatives	0	0
Separate Account assets transferred from Level 1 to Level 2	7,000,000
MarginDepositAssets	$ 8,100,000	$ 700,000