Segment Information (Premiums, Universal Life and Investment-Type Policy Fees and Other Revenues by US and Foreign Operations) (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
U.S. [Member]
Segment Reporting Information [Line Items]
Total premiums, universal life and investment-type product policy fees and other revenues	32,529	31,500	30,108
Japan [Member]
Segment Reporting Information [Line Items]
Total premiums, universal life and investment-type product policy fees and other revenues	7,373	7,833	7,184
Other Foreign [Member]
Segment Reporting Information [Line Items]
Total premiums, universal life and investment-type product policy fees and other revenues	$ 9,143	$ 9,104	$ 9,407