XML 57 R46.htm IDEA: XBRL DOCUMENT
v3.10.0.1

INVESTMENT IN TRANSMISSION AFFILIATES (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2018
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, 2018
(in millions) |  | ATC |  | ATC Holdco |  | Total
Balance at beginning of period |  | $ | 1,558.4 |  |  | $ | 38.2 |  |  | $ | 1,596.6 |
Add: Earnings (loss) from equity method investment |  | 34.6 |  |  | (0.9 | ) |  | 33.7 |
Add: Capital contributions |  | 9.1 |  |  | 2.2 |  |  | 11.3 |
Less: Distributions |  | 27.8 |  |  | — |  |  | 27.8 |
Less: Other |  | 0.1 |  |  | — |  |  | 0.1 |
Balance at end of period |  | $ | 1,574.2 |  |  | $ | 39.5 |  |  | $ | 1,613.7 |
|  | Three Months Ended September 30, 2017
(in millions) |  | ATC |  | ATC Holdco |  | Total
Balance at beginning of period |  | $ | 1,539.5 |  |  | $ | 4.5 |  |  | $ | 1,544.0 |
Add: Earnings (loss) from equity method investment |  | 40.9 |  |  | (1.7 | ) |  | 39.2 |
Add: Capital contributions |  | 12.1 |  |  | 0.7 |  |  | 12.8 |
Less: Distributions |  | 35.2 |  |  | — |  |  | 35.2 |
Balance at end of period |  | $ | 1,557.3 |  |  | $ | 3.5 |  |  | $ | 1,560.8 |
|  | Nine Months Ended September 30, 2018
(in millions) |  | ATC |  | ATC Holdco |  | Total
Balance at beginning of period |  | $ | 1,515.8 |  | (1) | $ | 37.6 |  |  | $ | 1,553.4 |
Add: Earnings (loss) from equity method investment |  | 97.8 |  |  | (2.6 | ) |  | 95.2 |
Add: Capital contributions |  | 39.2 |  |  | 4.5 |  |  | 43.7 |
Less: Distributions |  | 78.5 |  | (2) | — |  |  | 78.5 |
Less: Other |  | 0.1 |  |  | — |  |  | 0.1 |
Balance at end of period |  | $ | 1,574.2 |  |  | $ | 39.5 |  |  | $ | 1,613.7 |
(1) | Distributions of $39.9 million, received in the first quarter of 2018, were approved and recorded as a receivable from ATC in other current assets at December 31, 2017.
(2) | Distributions of $27.7 million, received in the fourth quarter of 2018, were approved and recorded as a receivable from ATC in accounts receivable at September 30, 2018.
|  | Nine Months Ended September 30, 2017
(in millions) |  | ATC |  | ATC Holdco |  | Total
Balance at beginning of period |  | $ | 1,443.9 |  | * | $ | — |  |  | $ | 1,443.9 |
Add: Earnings (loss) from equity method investment |  | 131.4 |  |  | (8.5 | ) |  | 122.9 |
Add: Capital contributions |  | 51.3 |  |  | 12.0 |  |  | 63.3 |
Less: Distributions |  | 69.2 |  |  | — |  |  | 69.2 |
Less: Other |  | 0.1 |  |  | — |  |  | 0.1 |
Balance at end of period |  | $ | 1,557.3 |  |  | $ | 3.5 |  |  | $ | 1,560.8 |
* | Distributions of $35.2 million, received in the first quarter of 2017, were approved and recorded as a receivable from ATC in other current assets at December 31, 2016.
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 30 |  | Nine Months Ended September 30
(in millions) |  | 2018 |  | 2017 |  | 2018 |  | 2017
Charges to ATC for services and construction |  | $ | 5.0 |  |  | $ | 4.4 |  |  | $ | 13.7 |  |  | $ | 12.3 |
Charges from ATC for network transmission services |  | 84.4 |  |  | 87.4 |  |  | 253.5 |  |  | 262.0 |
Refund from ATC related to a FERC audit |  | — |  |  | — |  |  | 22.0 |  |  | — |
Refund from ATC per FERC ROE order |  | — |  |  | — |  |  | — |  |  | 28.3 |
Schedule of receivables and payables with ATC | Our balance sheets included the following receivables and payables related to ATC:
(in millions) |  | September 30, 2018 |  | December 31, 2017
Accounts receivable for services provided to ATC |  | $ | 2.9 |  |  | $ | 1.5 |
Dividends receivable from ATC |  | 27.7 |  |  | 39.9 |
Accounts payable for services received from ATC |  | 28.1 |  |  | 31.2 |
Schedule of summarized income statement data for ATC | Summarized financial data for ATC is included in the following tables:
|  | Three Months Ended September 30 |  | Nine Months Ended September 30
(in millions) |  | 2018 |  | 2017 |  | 2018 |  | 2017
Income statement data |  |  |  |  |  |  |  |
Operating revenues |  | $ | 170.4 |  |  | $ | 171.1 |  |  | $ | 501.3 |  |  | $ | 522.4 |
Operating expenses |  | 87.9 |  |  | 85.3 |  |  | 264.3 |  |  | 251.0 |
Other expense, net |  | 27.4 |  |  | 27.2 |  |  | 80.4 |  |  | 78.7 |
Net income |  | $ | 55.1 |  |  | $ | 58.6 |  |  | $ | 156.6 |  |  | $ | 192.7 |
Schedule of summarized balance sheet data for ATC |
(in millions) |  | September 30, 2018 |  | December 31, 2017
Balance sheet data |  |  |  |
Current assets |  | $ | 95.3 |  |  | $ | 87.7 |
Noncurrent assets |  | 4,857.6 |  |  | 4,598.9 |
Total assets |  | $ | 4,952.9 |  |  | $ | 4,686.6 |
Current liabilities |  | $ | 640.6 |  |  | $ | 767.2 |
Long-term debt |  | 2,013.9 |  |  | 1,790.6 |
Other noncurrent liabilities |  | 313.6 |  |  | 240.3 |
Shareholders' equity |  | 1,984.8 |  |  | 1,888.5 |
Total liabilities and shareholders' equity |  | $ | 4,952.9 |  |  | $ | 4,686.6 |

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
Name: | us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular reconciliation of beginning and ending balances of investments accounted for under the equity method of accounting. + References No definition available. + Details
Name: | wec_ScheduleOfChangesToEquityMethodInvestmentsTableTextBlock
Namespace Prefix: | wec_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of summarized balance sheet data related to significant equity method investments. + References No definition available. + Details
Name: | wec_ScheduleOfEquityMethodInvestmentsSummarizedBalanceSheetDataTableTextBlock
Namespace Prefix: | wec_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of summarized income statement data related to significant equity method investments. + References No definition available. + Details
Name: | wec_ScheduleOfEquityMethodInvestmentsSummarizedIncomeStatementDataTableTextBlock
Namespace Prefix: | wec_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of balance sheet information related to transactions entered into with related parties. + References No definition available. + Details
Name: | wec_ScheduleOfRelatedPartyTransactionsBalanceSheetInformationTableTextBlock
Namespace Prefix: | wec_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=wec_TransmissionAffiliateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |