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GOODWILL (Details) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2018 USD ($)
Changes to our goodwill balances by segment |
Goodwill balance as of January 1, 2018 | $ 3,053.5
Goodwill balance as of March 31, 2018 | 3,052.8
Accumulated impairment losses | 0.0
Bluewater |
Changes to our goodwill balances by segment |
Adjustment to Bluewater purchase price allocation | (0.7)
Wisconsin |
Changes to our goodwill balances by segment |
Goodwill balance as of January 1, 2018 | 2,104.3
Goodwill balance as of March 31, 2018 | 2,104.3
Wisconsin | Bluewater |
Changes to our goodwill balances by segment |
Adjustment to Bluewater purchase price allocation | 0.0
Illinois |
Changes to our goodwill balances by segment |
Goodwill balance as of January 1, 2018 | 758.7
Goodwill balance as of March 31, 2018 | 758.7
Illinois | Bluewater |
Changes to our goodwill balances by segment |
Adjustment to Bluewater purchase price allocation | 0.0
Other States |
Changes to our goodwill balances by segment |
Goodwill balance as of January 1, 2018 | 183.2
Goodwill balance as of March 31, 2018 | 183.2
Other States | Bluewater |
Changes to our goodwill balances by segment |
Adjustment to Bluewater purchase price allocation | 0.0
Non-Utility Energy Infrastructure |
Changes to our goodwill balances by segment |
Goodwill balance as of January 1, 2018 | 7.3
Goodwill balance as of March 31, 2018 | 6.6
Non-Utility Energy Infrastructure | Bluewater |
Changes to our goodwill balances by segment |
Adjustment to Bluewater purchase price allocation | $ (0.7)

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