Significant Accounting Policies and Pronouncements (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2009 Restatement Adjustment [Member] Pension Accounting Change [Member]	Dec. 31, 2009 Restatement Adjustment [Member] Deferred Acquisition Costs [Member]	Dec. 31, 2012 Minimum [Member]	Dec. 31, 2012 Maximum [Member]	Dec. 31, 2012 Traditional Participating Life Insurance [Member] Maximum [Member]	Dec. 31, 2012 Interest Sensitive And Variable Life And Fixed And Variable Deferred Annuity [Member] Minimum [Member]	Dec. 31, 2012 Interest Sensitive And Variable Life And Fixed And Variable Deferred Annuity [Member] Maximum [Member]
Significant Accounting Policies [Line Items]
Contractual Due Date	The Company defines “past due” as principal or interest not collected at least 30 days past the scheduled contractual due date
Accruing interest on Non performing Loans	The Company discontinues accruing interest on loans after the loans become 90 days delinquent as to principal or interest payments, or earlier when the Company has doubts about collectability
Loan-to-value ratios	100.00%
Debt service coverage ratios	1.0
Securities loaned transactions collateral				102.00%	105.00%
Partnership interest	or under the cost method when the Company’s partnership interest is so minor (generally less than 3%) that it exercises virtually no influence over operating and financial policies
Expected Life Of Contract						45 years	25 years	99 years
Property Plant And Equipment Useful Life				3 years	40 years
Cumulative Effect on Retained Earnings, Net of Tax		$ 144	$ (2,358)
Cumulative Effect on AOCI for Change in Accounting		$ (144)	$ (90)