Claim Liabilities and Claim Adjustment Expenses, Supplementary Information about Average Percentage Payout of Incurred Claims by Age (Details) - Property and Casualty [Member] |
Dec. 31, 2016 |
|---|---|
| Average Annual Percentage Payout of Incurred Claims by Age, Net of Reinsurance [Abstract] | |
| 2007 | 45.60% |
| 2008 | 21.60% |
| 2009 | 11.90% |
| 2010 | 7.10% |
| 2011 | 4.80% |
| 2012 | 2.90% |
| 2013 | 1.50% |
| 2014 | 0.70% |
| 2015 | 0.60% |
| 2016 | 0.70% |