Industry Segments and Geographic Area Information - Geographic Area (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net Sales:
Net sales	$ 4,947.9	$ 4,194.1	$ 3,682.5
Operating Income:
Operating Income	709.1	532.3	494.5
Long-lived Assets:
Long-Lived Assets	3,375.8	3,397.1	3,492.4
Assets held for sale - non-current	0.0	177.1
Electrical Solutions
Net Sales:
Net sales	2,076.8	1,859.7	1,603.1
Discontinued Operations, Disposed of by Sale | Commercial and Industrial Lighting Business
Long-lived Assets:
Assets held for sale - current		356.6
Assets held for sale - non-current		177.1
United States
Net Sales:
Net sales	4,536.4	3,809.8	3,356.9
Operating Income:
Operating Income	598.5	439.6	436.3
Long-lived Assets:
Long-Lived Assets	2,983.5	3,038.1	3,113.7
United States | Electrical Solutions
Net Sales:
Net sales	1,820.6	1,604.9	1,389.0
International
Net Sales:
Net sales	411.5	384.3	325.6
Operating Income:
Operating Income	110.6	92.7	58.2
Long-lived Assets:
Long-Lived Assets	392.3	359.0	378.7
International | Electrical Solutions
Net Sales:
Net sales	$ 256.2	$ 254.8	$ 214.1