| Present Value of Future Insurance Profits, Unrealized Gain (Loss) on Investment | en-US | http://www.xbrl.org/2003/role/label | http://www.xbrl.org/2003/role/link |
| Present Value of Future Insurance Profits, Unrealized Gain (Loss) on Investment, Total | en-US | http://www.xbrl.org/2003/role/totalLabel | http://www.xbrl.org/2003/role/link |
| Amount of unrealized investment gain (loss) which decreases (increases) present value of future profits of insurance contract acquired in business combination. | en-US | http://www.xbrl.org/2003/role/documentation | http://www.xbrl.org/2003/role/link |