Amount, after effects of reinsurance, of expense for claims incurred in the current reporting period and related claims settlement costs.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=99382578&loc=d3e14764-158437

Name:	us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

General Subsequent Event (Details) - USD ($) $ in Millions	1 Months Ended	9 Months Ended
General Subsequent Event (Details) - USD ($) $ in Millions	Oct. 31, 2018	Sep. 30, 2018	Sep. 30, 2017
Subsequent Event [Line Items]
Current Year Claims and Claims Adjustment Expense		$ 14,186	$ 14,963
Subsequent Event [Member] \| Hurricane [Member] \| Maximum [Member]
Subsequent Event [Line Items]
Current Year Claims and Claims Adjustment Expense	$ 250
Subsequent Event [Member] \| Hurricane [Member] \| Minimum [Member]
Subsequent Event [Line Items]
Current Year Claims and Claims Adjustment Expense	$ 150