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INVESTMENT IN TRANSMISSION AFFILIATES (Tables)
 9 Months Ended
Sep. 30, 2020
Investment in transmission affiliates  
Schedule of changes to our investments in transmission affiliates 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)ATCATC HoldcoTotal
Balance at beginning of period $1,713.3 $31.4 $1,744.7 
Add: Earnings from equity method investment39.6 0.5 40.1 
Add: Capital contributions6.2 — 6.2 
Less: Distributions 39.9 — 39.9 
Less: Return of capital— 0.6 0.6 
Less: Other0.1 — 0.1 
Balance at end of period$1,719.1 $31.3 $1,750.4 

Three Months Ended September 30, 2019
(in millions)ATCATC HoldcoTotal
Balance at beginning of period$1,656.6 $39.9 $1,696.5 
Add: Earnings from equity method investment38.3 0.4 38.7 
Add: Capital contributions15.1 0.3 15.4 
Less: Distributions 30.3 — 30.3 
Add: Other0.1 — 0.1 
Balance at end of period$1,679.8 $40.6 $1,720.4 

Nine Months Ended September 30, 2020
(in millions)ATCATC HoldcoTotal
Balance at beginning of period$1,684.7 $36.1 $1,720.8 
Add: Earnings from equity method investment131.7 1.1 132.8 
Add: Capital contributions15.2 — 15.2 
Less: Distributions112.5 — 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)ATCATC HoldcoTotal
Balance at beginning of period$1,625.3 $40.0 $1,665.3 
Add: Earnings (loss) from equity method investment112.2 (0.5)111.7 
Add: Capital contributions36.2 1.1 37.3 
Less: Distributions 93.9 — 93.9 
Balance at end of period$1,679.8 $40.6 $1,720.4 
ATC  
Investment in transmission affiliates  
Schedule of significant transactions with ATC
The following table summarizes our significant related party transactions with ATC:
Three Months Ended September 30Nine Months Ended September 30
(in millions)2020201920202019
Charges to ATC for services and construction$5.7 $9.2 $18.7 $16.5 
Charges from ATC for network transmission services85.5 86.9 252.0 261.0 
Schedule of receivables and payables with ATC
Our balance sheets included the following receivables and payables for services received from or provided to ATC:
(in millions)September 30, 2020December 31, 2019
Accounts receivable for services provided to ATC$2.1 $3.5 
Accounts payable for services received from ATC30.0 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.
Schedule of summarized income statement data for ATC
Summarized financial data for ATC is included in the tables below:
Three Months Ended September 30Nine Months Ended September 30
(in millions)2020201920202019
Income statement data
Operating revenues$187.8 $184.9 $577.7 $544.8 
Operating expenses93.0 94.7 285.7 278.7 
Other expense, net28.1 28.7 82.0 86.1 
Net income$66.7 $61.5 $210.0 $180.0 
Schedule of summarized balance sheet data for ATC
(in millions)September 30, 2020December 31, 2019
Balance sheet data
Current assets$92.5 $84.7 
Noncurrent assets5,375.2 5,244.2 
Total assets$5,467.7 $5,328.9 
Current liabilities$349.9 $502.6 
Long-term debt2,512.1 2,312.8 
Other noncurrent liabilities335.0 298.9 
Members' equity2,270.7 2,214.6 
Total liabilities and members' equity$5,467.7 $5,328.9