Investments (Investment Income Realized Investment Gains And Losses And Change In Unrealized Investment Gains And Losses) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Investment income summarized by investment category:
Interest on fixed maturities	$ 413	$ 420	$ 424
Dividends on equity securities	122	115	104
Other investment income	3	3	4
Total	538	538	532
Less investment expenses	9	7	7
Total	529	531	525
Realized investment gains and losses summary:
Other	(7)	7	3
Realized gains on investments	83	42	70
Change in unrealized investment gains and losses and other summary:
Adjustment to deferred acquisition costs and life policy reserves	41	(28)	(14)
Pension obligations	(83)	13	25
Other	(7)	7	3
Income taxes on above	202	124	71
Other Comprehensive Income (Loss), Net of Tax	375	228	132
Fixed Maturities [Member]
Realized investment gains and losses summary:
Gross realized gains	12	35	11
Gross realized losses	0	0	0
Other-than-temporary impairments	2	1	5
Change in unrealized investment gains and losses and other summary:
Unrealized gains on investments available-for-sale	(387)	176	200
Equity Securities [Member]
Realized investment gains and losses summary:
Securities with embedded derivatives	3	1	(1)
Other	6	2	6
Gross realized gains	64	39	151
Gross realized losses	0	(2)	(40)
Other-than-temporary impairments	0	32	52
Change in unrealized investment gains and losses and other summary:
Other	6	2	6
Unrealized gains on investments available-for-sale	$ 847	$ 210	$ 39