XML 59 R47.htm IDEA: XBRL DOCUMENT
v3.19.1

INVESTMENT IN TRANSMISSION AFFILIATES (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2019
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 March 31, 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 |  | 36.5 |  |  | (0.4 | ) |  | 36.1 |
Add: Capital contributions |  | 3.0 |  |  | 0.4 |  |  | 3.4 |
Less: Distributions |  | 34.2 |  |  | — |  |  | 34.2 |
Balance at end of period |  | $ | 1,630.6 |  |  | $ | 40.0 |  |  | $ | 1,670.6 |
|  | Three Months Ended March 31, 2018
(in millions) |  | ATC |  | ATC Holdco |  | Total
Balance at beginning of period * |  | $ | 1,515.8 |  |  | $ | 37.6 |  |  | $ | 1,553.4 |
Add: Earnings (loss) from equity method investment |  | 33.4 |  |  | (0.6 | ) |  | 32.8 |
Add: Capital contributions |  | 12.0 |  |  | 0.8 |  |  | 12.8 |
Less: Other |  | 0.1 |  |  | — |  |  | 0.1 |
Balance at end of period |  | $ | 1,561.1 |  |  | $ | 37.8 |  |  | $ | 1,598.9 |
* | 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.
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 March 31
(in millions) |  | 2019 |  | 2018
Charges to ATC for services and construction |  | $ | 4.0 |  |  | $ | 4.6 |
Charges from ATC for network transmission services |  | 87.1 |  |  | 84.5 |
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) |  | March 31, 2019 |  | December 31, 2018
Accounts receivable for services provided to ATC |  | $ | 2.0 |  |  | $ | 3.4 |
Accounts payable for services received from ATC |  | 29.0 |  |  | 28.2 |
Schedule of summarized income statement data for ATC | Summarized financial data for ATC is included in the following tables:
|  | Three Months Ended March 31
(in millions) |  | 2019 |  | 2018
Income statement data |  |  |  |
Operating revenues |  | $ | 177.7 |  |  | $ | 165.4 |
Operating expenses |  | 90.4 |  |  | 84.9 |
Other expense, net |  | 28.8 |  |  | 27.6 |
Net income |  | $ | 58.5 |  |  | $ | 52.9 |
Schedule of summarized balance sheet data for ATC |
(in millions) |  | March 31, 2019 |  | December 31, 2018
Balance sheet data |  |  |  |
Current assets |  | $ | 87.8 |  |  | $ | 87.2 |
Noncurrent assets |  | 5,012.7 |  |  | 4,928.8 |
Total assets |  | $ | 5,100.5 |  |  | $ | 5,016.0 |
Current liabilities |  | $ | 571.1 |  |  | $ | 640.0 |
Long-term debt |  | 2,164.1 |  |  | 2,014.0 |
Other noncurrent liabilities |  | 288.6 |  |  | 295.3 |
Shareholders' equity |  | 2,076.7 |  |  | 2,066.7 |
Total liabilities and shareholders' equity |  | $ | 5,100.5 |  |  | $ | 5,016.0 |

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: |