SIGNIFICANT ACCOUNTING POLICIES - MORTGAGES REAL ESTATE (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Commercial Real Estate Portfolio Segment
Mortgage Loans on Real Estate, Write-down or Reserve, Management Judgment Factor [Line Items]
Nonaccrual Mortgage Loans on Real Estate, Net	$ 72	$ 89

Recorded investment in financing receivables that are on nonaccrual status as of the balance sheet date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5111-111524

Name:	us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant