Foreign Operations (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Foreign operations data
Revenues	$ 1,273,000,000	$ 1,257,400,000	$ 1,209,200,000
Foreign Operations (Textual) [Abstract]
Maximum percentage of consolidated revenues derive from any individual foreign country	10.00%
Percentage of company's identifiable assets	10.00%
Assets of Continuing Operations	$ 10,072,000,000	9,541,700,000	8,937,600,000
Foreign [Member]
Foreign operations data
Revenues	466,900,000	468,500,000	374,900,000
Foreign Operations (Textual) [Abstract]
Assets of Continuing Operations	3,910,200,000	3,783,300,000	3,438,600,000
United States [Member]
Foreign operations data
Revenues	806,100,000	788,900,000	834,300,000
Foreign Operations (Textual) [Abstract]
Assets of Continuing Operations	$ 6,161,800,000	$ 5,758,400,000	$ 5,499,000,000