We own approximately 60% of ATC, a for-profit, transmission-only company regulated by the FERC for cost of service and certain state regulatory commissions for routing and siting of transmission projects. We also own approximately 75% of ATC Holdco, a separate entity formed in December 2016 to invest in transmission-related projects outside of ATC's traditional footprint. The following tables provide a reconciliation of the changes in our investments in ATC and ATC Holdco:


	Three Months Ended September 30, 2020
(in millions)	ATC		ATC Holdco		Total
Balance at beginning of period	$	1,713.3	$	31.4	$	1,744.7
Add: Earnings from equity method investment	39.6		0.5		40.1
Add: Capital contributions	6.2		—		6.2
Less: Distributions	39.9		—		39.9
Less: Return of capital	—		0.6		0.6
Less: Other	0.1		—		0.1
Balance at end of period	$	1,719.1	$	31.3	$	1,750.4


	Three Months Ended September 30, 2019
(in millions)	ATC		ATC Holdco		Total
Balance at beginning of period	$	1,656.6	$	39.9	$	1,696.5
Add: Earnings from equity method investment	38.3		0.4		38.7
Add: Capital contributions	15.1		0.3		15.4
Less: Distributions	30.3		—		30.3
Add: Other	0.1		—		0.1
Balance at end of period	$	1,679.8	$	40.6	$	1,720.4


	Nine Months Ended September 30, 2020
(in millions)	ATC		ATC Holdco		Total
Balance at beginning of period	$	1,684.7	$	36.1	$	1,720.8
Add: Earnings from equity method investment	131.7		1.1		132.8
Add: Capital contributions	15.2		—		15.2
Less: Distributions	112.5		—		112.5
Less: Return of capital	—		5.9		5.9

Balance at end of period	$	1,719.1	$	31.3	$	1,750.4


	Nine Months Ended September 30, 2019
(in millions)	ATC		ATC Holdco		Total
Balance at beginning of period	$	1,625.3	$	40.0	$	1,665.3
Add: Earnings (loss) from equity method investment	112.2		(0.5)		111.7
Add: Capital contributions	36.2		1.1		37.3
Less: Distributions	93.9		—		93.9
Balance at end of period	$	1,679.8	$	40.6	$	1,720.4

We pay ATC for network transmission and other related services it provides. In addition, we provide a variety of operational, maintenance, and project management work for ATC, which is reimbursed by ATC. We are required to pay the cost of needed transmission infrastructure upgrades for new generation projects while the projects are under construction. ATC reimburses us for these costs when the new generation is placed in service.


	Three Months Ended September 30				Nine Months Ended September 30
(in millions)	2020		2019		2020		2019
Charges to ATC for services and construction	$	5.7	$	9.2	$	18.7	$	16.5
Charges from ATC for network transmission services	85.5		86.9		252.0		261.0

Our balance sheets included the following receivables and payables for services received from or provided to ATC:


(in millions)	September 30, 2020		December 31, 2019
Accounts receivable for services provided to ATC	$	2.1	$	3.5

Accounts payable for services received from ATC	30.0		29.0
Amounts due from ATC for transmission infrastructure upgrades (1)	5.1		2.8

(1)In connection with WPS's construction of its two new solar projects, Badger Hollow I and Two Creeks, and WE's construction of its new solar project, Badger Hollow II, WPS and WE are required to initially fund the construction of the transmission infrastructure upgrades needed for the new generation. ATC owns these transmission assets and will reimburse WPS and WE for these costs after the new generation has been placed in service.


	Three Months Ended September 30				Nine Months Ended September 30
(in millions)	2020		2019		2020		2019
Income statement data
Operating revenues	$	187.8	$	184.9	$	577.7	$	544.8
Operating expenses	93.0		94.7		285.7		278.7
Other expense, net	28.1		28.7		82.0		86.1
Net income	$	66.7	$	61.5	$	210.0	$	180.0


(in millions)	September 30, 2020		December 31, 2019
Balance sheet data
Current assets	$	92.5	$	84.7
Noncurrent assets	5,375.2		5,244.2
Total assets	$	5,467.7	$	5,328.9

Current liabilities	$	349.9	$	502.6
Long-term debt	2,512.1		2,312.8
Other noncurrent liabilities	335.0		298.9
Members' equity	2,270.7		2,214.6
Total liabilities and members' equity	$	5,467.7	$	5,328.9