| Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Net | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Net, Beginning Balance | en-US | http://www.xbrl.org/2003/role/periodStartLabel | http://www.xbrl.org/2003/role/link |
| Liabilities for Guarantees on Long-Duration Contracts, Guaranteed Benefit Liability, Net, Ending Balance | en-US | http://www.xbrl.org/2003/role/periodEndLabel | http://www.xbrl.org/2003/role/link |