|
Fair Value Measurements (Narrative) (Detail) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Sep. 30, 2014
|
Sep. 30, 2013
|
Sep. 30, 2014
|
Sep. 30, 2013
|
|
| Fair Value Measurements Of Financial Instruments [Line Items] | ||||
| Level 1 to Level 2 Transfers | $ 0 | $ 0 | $ 0 | $ 19 |
| Level 2 to Level 1 Transfers | 0 | 0 | 0 | 0 |
| Guaranteed Living Benefits, Net Income Impact From Model Refinement | $ 0 | $ (2) | ||
|
Redemption Notice Periods Lower Range [Member]
|
||||
| Fair Value Measurements Of Financial Instruments [Line Items] | ||||
| Notice period for redemption for alternative investments investment funds, days | 5 days | |||
|
Redemption Notice Periods Upper Range [Member]
|
||||
| Fair Value Measurements Of Financial Instruments [Line Items] | ||||
| Notice period for redemption for alternative investments investment funds, days | 120 days | |||