Shareholder's Equity (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Amounts Reclassified from AOCI
Net investment income	$ 358	$ 377
Income tax benefit	(54)	(19)
Net income	240	171
Net unrealized losses on Available-for-Sale securities
Amounts Reclassified from AOCI
Adjustments to AOCI for the impact to DAC, DSIC, benefit reserves and reinsurance recoverable on net unrealized securities gains, net of tax	64
Net unrealized losses on Available-for-Sale securities | Amount Reclassified from AOCI
Amounts Reclassified from AOCI
Net investment income	1
Income tax benefit	(1)
Losses on cash flow hedges: | Amount Reclassified from AOCI
Amounts Reclassified from AOCI
Net investment income	2
Income tax benefit	(1)
Net income	$ 1