Segment Information (Premiums, Universal Life and Investment-Type Policy Fees and Other Revenues by Major Product Groups) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Total premiums, universal life and investment-type product policy fees and other revenues	$ 49,045	$ 48,437	$ 46,699
Life Insurance [Member]
Segment Reporting Information [Line Items]
Total premiums, universal life and investment-type product policy fees and other revenues	32,176	31,723	30,486
Accident and Health Insurance [Member]
Segment Reporting Information [Line Items]
Total premiums, universal life and investment-type product policy fees and other revenues	13,214	13,255	12,269
Property and Casualty Insurance [Member]
Segment Reporting Information [Line Items]
Total premiums, universal life and investment-type product policy fees and other revenues	3,270	3,117	3,043
Non-Insurance [Member]
Segment Reporting Information [Line Items]
Total premiums, universal life and investment-type product policy fees and other revenues	$ 385	$ 342	$ 901