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ACQUISITION OF AQUARION (Tables)
 6 Months Ended
Jun. 30, 2018
Business Combinations [Abstract]  
Schedule of Business Acquisition by Acquisition
The allocation of the cash purchase price is as follows:
(Millions of Dollars)
 
Current Assets
$
41.2

PP&E
1,034.9

Goodwill
907.9

Other Noncurrent Assets, excluding Goodwill
215.5

Current Liabilities
(121.9
)
Noncurrent Liabilities
(421.6
)
Long-Term Debt
(778.3
)
Total Cash Purchase Price
$
877.7