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INVESTMENT IN TRANSMISSION AFFILIATES (Tables)
 6 Months Ended
Jun. 30, 2022
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 June 30, 2022
(in millions)ATCATC HoldcoTotal
Balance at beginning of period $1,795.0 $23.2 $1,818.2 
Add: Earnings from equity method investment42.6 0.4 43.0 
Add: Capital contributions9.2 — 9.2 
Less: Distributions 33.2 — 33.2 
Balance at end of period$1,813.6 $23.6 $1,837.2 
Three Months Ended June 30, 2021
(in millions)ATCATC HoldcoTotal
Balance at beginning of period$1,741.9 $31.7 $1,773.6 
Add: Earnings from equity method investment40.7 0.6 41.3 
Less: Distributions32.8 — 32.8 
Less: Other0.1 — 0.1 
Balance at end of period$1,749.7 $32.3 $1,782.0 
Six Months Ended June 30, 2022
(in millions)ATCATC HoldcoTotal
Balance at beginning of period$1,766.9 $22.5 $1,789.4 
Add: Earnings from equity method investment83.6 1.1 84.7 
Add: Capital contributions30.3 — 30.3 
Less: Distributions67.2 — 67.2 
Balance at end of period$1,813.6 $23.6 $1,837.2 
Six Months Ended June 30, 2021
(in millions)ATCATC HoldcoTotal
Balance at beginning of period$1,733.5 $30.8 $1,764.3 
Add: Earnings from equity method investment82.4 1.5 83.9 
Less: Distributions66.2 — 66.2 
Balance at end of period$1,749.7 $32.3 $1,782.0 
ATC  
Investment in transmission affiliates  
Schedule of significant related party transactions with ATC
The following table summarizes our significant related party transactions with ATC:
Three Months Ended June 30Six Months Ended June 30
(in millions)2022202120222021
Charges to ATC for services and construction$4.7 $5.7 $10.9 $11.7 
Charges from ATC for network transmission services90.8 89.1 181.9 181.7 
Schedule of receivables and payables with ATC
Our balance sheets included the following receivables and payables for services provided to or received from ATC:
(in millions)June 30, 2022December 31, 2021
Accounts receivable for services provided to ATC$1.4 $2.0 
Accounts payable for services received from ATC30.6 30.2 
Amounts due from ATC for transmission infrastructure upgrades (1)
14.9 13.0 

(1)The transmission infrastructure upgrades were primarily related to WE's and WPS's construction of Paris, as well as WE's continued construction of Badger Hollow II.
Schedule of summarized income statement data for ATC
Summarized financial data for ATC is included in the tables below:
Three Months Ended June 30Six Months Ended June 30
(in millions)2022202120222021
Income statement data
Operating revenues$191.6 $185.9 $382.6 $374.6 
Operating expenses95.2 92.4 190.7 187.5 
Other expense, net28.8 28.1 56.8 56.6 
Net income$67.6 $65.4 $135.1 $130.5 
Schedule of summarized balance sheet data for ATC
(in millions)June 30, 2022December 31, 2021
Balance sheet data
Current assets$106.0 $89.8 
Noncurrent assets5,801.8 5,628.1 
Total assets$5,907.8 $5,717.9 
Current liabilities$482.7 $436.9 
Long-term debt2,562.4 2,513.0 
Other noncurrent liabilities438.5 422.0 
Members' equity2,424.2 2,346.0 
Total liabilities and members' equity$5,907.8 $5,717.9