EQUITY METHOD INVESTMENTS (Tables)

Investments in corporate joint ventures and other companies accounted for under the equity method at December 31, 2013, and 2012 were as follows:

ATC, INDU Solar Holdings, LLC, and WRPC

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



(Millions)	2013		2012		2011
Income statement data
Revenues	$	642.0	$	618.3	$	575.5
Operating expenses	306.2		292.1		269.6
Other expense	83.7		85.1		81.5
Net income	$	252.1	$	241.1	$	224.4

Earnings from equity method investments	$	91.4	$	87.2	$	79.4



(Millions)	December 31, 2013		December 31, 2012
Balance sheet data
Current assets	$	90.2	$	81.1
Noncurrent assets	3,587.2		3,347.4
Total assets	$	3,677.4	$	3,428.5

Current liabilities	$	383.6	$	253.0
Long-term debt	1,559.1		1,559.5
Other noncurrent liabilities	134.4		103.5
Shareholders’ equity	1,600.3		1,512.5
Total liabilities and shareholders’ equity	$	3,677.4	$	3,428.5

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



(Millions)	2013		2012		2011
Balance at the beginning of period	$	476.6	$	439.4	$	416.3
Add: Earnings from equity method investment	89.1		85.3		79.1
Add: Capital contributions	13.7		20.4		8.5
Less: Dividends received	71.0		68.5		64.5
Balance at the end of period	$	508.4	$	476.6	$	439.4

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



(Millions)	2013		2012		2011
Total charges to ATC for services and construction	$	11.3	$	12.5	$	13.5
Total costs for network transmission service provided by ATC	104.9		100.3		102.7

INDU Solar Holdings, LLC

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



(Millions)	2013		2012		2011
Balance at the beginning of period	$	27.5	$	28.4	$	0.1
Add: Earnings (loss) from equity method investment	1.3		1.1		(0.7		)
Add: Capital contributions	—		7.0		29.0
Less: Return of capital to partners	4.1		9.0		—
Balance at the end of period	$	24.7	$	27.5	$	28.4

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



(Millions)	2013		2012		2011
Balance at the beginning of period	$	7.3	$	7.7	$	8.1
Add: Earnings from equity method investment	1.0		0.8		0.9
Less: Dividends received	1.3		1.2		1.3
Balance at the end of period	$	7.0	$	7.3	$	7.7

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



(Millions)	2013		2012		2011
Charges to WRPC for operations	$	0.9	$	0.8	$	0.7
Purchases of energy from WRPC	3.7		5.0		4.9
Net proceeds from WRPC sales of energy to MISO	—		2.9		4.7