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Schedule I - Cash Dividends Received from Subsidiaries (Details) - WEC Energy Group - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Notes to parent company financial statements |  |  |
Cash dividends received from subsidiaries | $ 548.6 | $ 734.4 | $ 538.8
WE |  |  |
Notes to parent company financial statements |  |  |
Cash dividends received from subsidiaries | 240.0 | 455.0 | 240.0
We Power |  |  |
Notes to parent company financial statements |  |  |
Cash dividends received from subsidiaries | 181.0 | 197.9 | 262.8
ATC Holding LLC |  |  |
Notes to parent company financial statements |  |  |
Cash dividends received from subsidiaries | 82.6 | 6.5 | 6.0
WG |  |  |
Notes to parent company financial statements |  |  |
Cash dividends received from subsidiaries | $ 45.0 | $ 75.0 | $ 30.0

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