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GOODWILL AND INTANGIBLES - GOODWILL (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2021 USD ($)
Changes to our goodwill balances by segment |
Changes to the carrying amount of goodwill | $ 0.0
Goodwill | 3,052.8
Accumulated impairment losses | 0.0
Wisconsin |
Changes to our goodwill balances by segment |
Goodwill | 2,104.3
Illinois |
Changes to our goodwill balances by segment |
Goodwill | 758.7
Other States |
Changes to our goodwill balances by segment |
Goodwill | 183.2
Non-Utility Energy Infrastructure |
Changes to our goodwill balances by segment |
Goodwill | $ 6.6

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