SHORT-TERM DEBT - Senior Notes (Details)	0 Months Ended
Sep. 30, 2027	Sep. 09, 2009 Senior Notes 2012 [Member]	Jul. 13, 2010 Senior Notes 2013 [Member]
Short-term Debt [Line Items]
Issuance date of Debt		Sep. 09, 2009	Jul. 13, 2010
Maturity date	Sep. 30, 2027	Sep. 14, 2012	Jul. 15, 2013

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(2))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration