AQUISITIONS AND DISCONTINUED OPERATIONS - Assets and Liabilities of Discontinued Operations (Details) - Discontinued Operations, Disposed of by Sale - Transformer Solutions Business - USD ($) $ in Millions	Jul. 03, 2021	Dec. 31, 2020
ASSETS
Accounts receivable, net	$ 49.3	$ 50.9
Contract assets	45.1	48.6
Inventories, net	21.0	18.9
Other current assets	1.7	3.2
Property, plant and equipment:
Property, plant and equipment, gross	210.7	210.7
Accumulated depreciation	(134.3)	(131.0)
Property, plant and equipment, net	76.4	79.7
Goodwill	131.3	131.3
Other assets	8.1	8.1
Total assets - discontinued operations	332.9	340.7
LIABILITIES
Accounts payable	37.3	34.1
Contract liabilities	67.3	57.2
Accrued expenses	24.2	24.5
Deferred and other income taxes	21.9	21.6
Other long-term liabilities	9.1	9.1
Total liabilities - discontinued operations	159.8	146.5
Land
Property, plant and equipment:
Property, plant and equipment, gross	6.4	6.5
Buildings and leasehold improvements
Property, plant and equipment:
Property, plant and equipment, gross	62.4	63.1
Machinery and equipment
Property, plant and equipment:
Property, plant and equipment, gross	$ 141.9	$ 141.1