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v3.22.4

Investment in Transmission Affiliates - Transactions with ATC (Details) - ATC - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Charges from ATC for network transmission services |  |  |
Charges to ATC for services and construction | $ 18.9 | $ 22.9 | $ 27.5
Charges from ATC for network transmission services | 363.7 | 361.0 | 350.5
Net refund (payment) from (to) ATC related to FERC ROE orders | (0.1) | 7.3 | $ 10.7
Balance sheet |  |  |
Accounts receivable for services provided to ATC | 1.2 | 2.0 |
Accounts payable for services received from ATC | 30.4 | 30.2 |
Amounts due from ATC for transmission infrastructure upgrades (1) | $ 26.6 | $ 13.0 |

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