Dividends From Subsidiaries And Statutory Financial Information (Schedule of Combined Net Income and Policyholders' Surplus in Accordance with Statutory Accounting Practices) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Insurance [Abstract]
Amount available for dividend distribution without prior approval from regulatory authorities	$ 631,000,000
Net income	753,260,000	469,354,000	482,457,000
Policyholders' surplus	5,438,064,000	4,908,010,000	4,671,979,000
Increase in BIC's statutory capital and surplus	251,000,000
Total Adjusted Capital percentage threshold		200.00%
BIC's Total Adjusted Capital balance	$ 5,200,000,000
BIC's Total Adjusted Capital balance as percentage of RBC Authorized Control Level	465.00%