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Reinsurance - Guaranteed Minimum Death Benefits Account Value, Net Amount at Risk and Contractholders (Details) (Variable Annuity [Member], Guaranteed Minimum Death Benefit [Member], USD $)
In Billions, unless otherwise specified |
3 Months Ended | 12 Months Ended |
|---|---|---|
|
Mar. 31, 2015
Contractholders
|
Dec. 31, 2014
Contractholders
|
|
|
Variable Annuity [Member] | Guaranteed Minimum Death Benefit [Member]
|
||
| Guaranteed Minimum Death Benefits Account Value, Net Amount at Risk And Average Age Table [Line Items] | ||
| Account value | $ 12.9 | $ 13.1 |
| Net amount at risk | $ 2.7 | $ 2.8 |
| Number of contractholders | 346,000 | 354,000 |