Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19,20)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_LongTermDebtCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

LONG TERM DEBT (Details) - Integrys Holding - Integrys Junior Notes due 2066 - USD ($) $ in Millions	May 14, 2018	Mar. 31, 2018
Debt Instrument [Line Items]
Long-term debt, current portion		$ 114.9
Subsequent event
Debt Instrument [Line Items]
Extinguishment of debt	$ 114.9