DAC, VOBA, DSI, and DFEL (DAC) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Changes in DAC [Roll Forward]
Balance as of beginning-of-year	$ 7,695	$ 5,943	$ 5,721
Deferrals	1,537	1,564	1,294
Amortization, net of interest:
Amortization, excluding unlocking, net of interest	(988)	(816)	(785)
Unlocking	17	42	(71)
Adjustment related to realized (gains) losses	(31)	(8)	(70)
Adjustment related to unrealized (gains) losses	(672)	970	(146)
Balance as of end-of-year	$ 7,558	$ 7,695	$ 5,943

The amount of other amortization of deferred policy acquisition costs, net of interest, during the period.

No definition available.

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The amount of adjustment to amortization of deferred policy acquisition costs arising from a revision in estimated gross profit (when such amount serves as the basis for allocating amortization of DAC to reporting periods).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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Amount of amortization of deferred policy acquisition costs due to realized investment gains or losses.

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Amount of amortization of deferred policy acquisition costs due to unrealized investment gains or losses.

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Total amount of policy acquisition costs capitalized during the income statement period.

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The unamortized portion as of the balance sheet date of capitalized acquisition costs that are related directly to the successful acquisition of new and renewal insurance contracts.

+ References

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-Publisher SEC

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