Income Tax (Net Deferred Income Tax Assets and Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Deferred income tax assets:
Policyholder liabilities and receivables	$ 1,014	$ 6,233
Investments, including derivatives	86	0
Net operating loss carryforwards	1,808	1,408
Employee benefits	737	1,234
Capital loss carryforwards	32	160
Tax credit carryforwards	1,653	545
Litigation-related and government mandated	232	197
Other	471	484
Total gross deferred income tax assets	6,033	10,261
Less: Valuation allowance	357	368
Total net deferred income tax assets	5,676	9,893
Deferred income tax liabilities:
Investments, including derivatives	0	3,149
Intangibles	2,081	2,668
Net unrealized investment gains	4,883	7,854
DAC	5,133	4,775
Other	222	140
Total deferred income tax liabilities	12,319	18,586
Deferred tax assets and liabilities [Abstract]
Net deferred income tax asset (liability)	$ (6,643)	$ (8,693)