EQUITY METHOD INVESTMENTS (Tables)

12 Months Ended

Dec. 31, 2014

Equity method investments

Schedule of equity method investments

Investments in corporate joint ventures and other companies accounted for under the equity method at December 31, 2014, and 2013, were as follows:

(Millions)	2014		2013
ATC	$	536.7	$	508.4
INDU Solar Holdings, LLC	21.8		24.7
WRPC	7.7		7.0
AMP Trillium, LLC	5.5		—
Other	0.7		0.8
Equity method investments	$	572.4	$	540.9

ATC

Equity method investments

Schedule of changes to equity method investments

The following table shows changes to our investment in ATC during the years ended December 31:

(Millions)	2014		2013		2012
Balance at the beginning of period	$	508.4	$	476.6	$	439.4
Add: Earnings from equity method investment	85.7		89.1		85.3
Add: Capital contributions	17.0		13.7		20.4
Less: Dividends received	74.4		71.0		68.5
Balance at the end of period	$	536.7	$	508.4	$	476.6

Schedule of related party transactions

The related party transactions recorded by the electric utilities during the years ended December 31 were as follows:

(Millions)	2014		2013		2012
Total charges to ATC for services and construction	$	9.9	$	11.3	$	12.5
Total costs for network transmission services provided by ATC	103.8		104.9		100.3

INDU Solar Holdings, LLC

Equity method investments

Schedule of changes to equity method investments

The following table shows changes to our investment in INDU Solar Holdings, LLC during the years ended December 31:

(Millions)	2014		2013		2012
Balance at the beginning of period	$	24.7	$	27.5	$	28.4
Add: Earnings from equity method investment	1.8		1.3		1.1
Add: Capital contributions	—		—		7.0
Less: Return of capital to partners	4.7		4.1		9.0
Balance at the end of period	$	21.8	$	24.7	$	27.5

WRPC

Equity method investments

Schedule of changes to equity method investments

The following table shows changes to our investment in WRPC during the years ended December 31:

(Millions)	2014		2013		2012
Balance at the beginning of period	$	7.0	$	7.3	$	7.7
Add: Earnings from equity method investment	0.8		1.0		0.8
Add: Capital contributions	0.5		—		—
Less: Dividends received	0.6		1.3		1.2
Balance at the end of period	$	7.7	$	7.0	$	7.3

Schedule of related party transactions

The related party transactions recorded by WPS during the years ended December 31 were as follows:

(Millions)	2014		2013		2012
Charges to WRPC for operations	$	1.4	$	0.9	$	0.8
Purchases of energy from WRPC	3.7		3.7		5.0
Net proceeds from WRPC sales of energy to MISO	—		—		2.9

AMP Trillium, LLC

Equity method investments

Schedule of changes to equity method investments

The following table shows changes to our investment in AMP Trillium, LLC during the year ended December 31:

(Millions)	2014
Balance at the beginning of period	$	—
Add: Capital contributions	5.5
Balance at the end of period	$	5.5

ATC, INDU Solar Holdings, LLC, WRPC, and AMP Trillium, LLC

Equity method investments

Summarized income statement data of significant equity method investments

Combined financial data of our significant equity method investments, ATC, INDU Solar Holdings, LLC, WRPC, and AMP Trillium, LLC, are included in the tables below:

(Millions)	2014		2013		2012
Income statement data
Revenues	$	655.6	$	642.0	$	618.3
Operating expenses	323.5		306.2		292.1
Other expense	88.4		83.7		85.1
Net income	$	243.7	$	252.1	$	241.1
Earnings from equity method investments	$	88.3	$	91.4	$	87.2

Summarized balance sheet data of significant equity method investments

(Millions)	December 31, 2014		December 31, 2013
Balance sheet data
Current assets	$	80.7	$	90.2
Noncurrent assets	3,835.9		3,587.2
Total assets	$	3,916.6	$	3,677.4
Current liabilities	$	324.0	$	383.6
Long-term debt	1,721.6		1,559.1
Other noncurrent liabilities	173.2		134.4
Shareholders’ equity	1,697.8		1,600.3
Total liabilities and shareholders’ equity	$	3,916.6	$	3,677.4