Equity Reclassification AOCI (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from accumulated other comprehensive income, current period, net of tax	$ (203)	$ (263)
Net Other-than-Temporary Impairments [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from accumulated other comprehensive income, current period, net of tax	17	27
Reclassification from accumulated other comprehensive income, current period, tax	10	15
Investments Gains (Losses), Net [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from accumulated other comprehensive income, current period, net of tax	(220)	(300)
Reclassification from accumulated other comprehensive income, current period, tax	119	162
Employee Benefits [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Reclassification from accumulated other comprehensive income, current period, net of tax	0	10
Reclassification from accumulated other comprehensive income, current period, tax	$ 0	$ 5