RELATED PARTY TRANSACTIONS (Details) - USD ($)
$ in Millions |
12 Months Ended |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
| Related Party Transaction [Line Items] |
|
|
|
| Sale of notes |
$ 0.0
|
$ 0.0
|
$ 575.0
|
| Purchase of notes |
114.2
|
0.0
|
0.0
|
| Affiliates of Platinum |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Sale of notes |
|
|
50.0
|
| Purchase of notes |
|
|
50.0
|
| Affiliates of Platinum | Corporate Advisory Services [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Transaction and financial fee |
|
|
22.2
|
| Affiliates of Platinum | Corporate Advisory Services [Member] | Geist |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Acquisition cost |
|
1.3
|
|
| Affiliates of Platinum | Corporate Advisory Services [Member] | General and Administrative Expense [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Related Party Costs |
5.0
|
5.0
|
|
| Affiliates of Platinum | Corporate Advisory Services [Member] | Selling, General and Administrative Expenses [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Related Party Costs |
|
|
15.0
|
| Charges related to other legal and consulting services |
0.4
|
0.9
|
|
| Affiliates of Platinum | Corporate Advisory Services [Member] | Sale of Critical Power Business [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Transaction and financial fee |
|
|
12.5
|
| Affiliates of Platinum | Corporate Advisory Services [Member] | Net Proceeds Received from 2022 Notes [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Transaction and financial fee |
|
|
4.3
|
| Affiliates of Platinum | Corporate Advisory Services [Member] | Purchase of Energy Labs, Inc During 2017 [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Transaction and financial fee |
|
|
1.4
|
| Affiliates of Platinum | Corporate Advisory Services [Member] | Fees and Expense Reimbursement [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Transaction and financial fee |
|
|
4.0
|
| Affiliates of Platinum | Corporate Advisory Services [Member] | Other Deductions, Net [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Transaction and financial fee |
|
|
12.5
|
| Affiliates of Emerson |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Sale of building |
|
2.8
|
|
| Received indemnification payments |
|
16.3
|
|
| Information technology services |
0.3
|
1.4
|
19.9
|
| Medical insurance |
|
|
3.6
|
| Other programs |
|
0.4
|
1.1
|
| Shared service centers |
|
|
13.5
|
| General corporate costs |
$ 0.1
|
$ 0.8
|
0.6
|
| JV Holdings |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Cash dividends paid |
|
|
$ 1,024.0
|