The following tables show summarized financial information for the three and nine months ended September 30, 2020 and 2019, related to our reportable segments:


(in millions)	Utility		Other		Wisconsin Public Service Corporation
Three Months Ended September 30, 2020
Operating revenues	$	367.7	$	—	$	367.7
Other operation and maintenance	105.2		—		105.2
Depreciation and amortization	43.5		—		43.5
Operating income	102.8		—		102.8
Other income, net	8.3		0.4		8.7
Interest expense	15.6		—		15.6


(in millions)	Utility		Other		Wisconsin Public Service Corporation
Three Months Ended September 30, 2019
Operating revenues	$	352.3	$	—	$	352.3
Other operation and maintenance	107.4		—		107.4
Depreciation and amortization	42.3		—		42.3
Operating income	78.0		—		78.0
Other income, net	9.5		0.3		9.8
Interest expense	15.8		—		15.8


(in millions)	Utility		Other		Wisconsin Public Service Corporation
Nine Months Ended September 30, 2020
Operating revenues	$	1,049.9	$	—	$	1,049.9
Other operation and maintenance	296.3		—		296.3
Depreciation and amortization	129.7		—		129.7
Operating income	263.1		—		263.1
Other income, net	24.2		1.2		25.4
Interest Expense	47.9		—		47.9


(in millions)	Utility		Other		Wisconsin Public Service Corporation
Nine Months Ended September 30, 2019
Operating revenues	$	1,069.0	$	—	$	1,069.0
Other operation and maintenance	308.7		—		308.7
Depreciation and amortization	123.4		—		123.4
Operating income	198.4		—		198.4
Other income, net	28.0		1.0		29.0
Interest expense	47.2		—		47.2