COVER PAGE	6 Months Ended
	Jun. 30, 2019 shares
Cover page.
Document type	10-Q
Document Quarterly Report	true
Document period end date	Jun. 30, 2019
Document Transition Report	false
Entity File Number	001-03016
Entity registrant name	WISCONSIN PUBLIC SERVICE CORPORATION
Entity Tax Identification Number	39-0715160
Entity Incorporation, State or Country Code	WI
Entity Address, Address Line One	700 North Adams Street
Entity Address, Address Line Two	P. O. Box 19001
Entity Address, City or Town	Green Bay
Entity Address, State or Province	WI
Entity Address, Postal Zip Code	54307-9001
City Area Code	800
Local Phone Number	450-7260
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity filer category	Non-accelerated Filer
Small business	false
Emerging growth company	false
Entity Shell Company	false
Entity common stock, shares outstanding	23,896,962
Entity central index key	0000107833
Amendment flag	false
Current fiscal year end date	--12-31
Document fiscal year focus	2019
Document fiscal period focus	Q2