Condensed Consolidated Statements of Cash Flows (Parentheticals) - USD ($)	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Cash Flows [Abstract]
Cash paid for interest, net of capitalized interest	$ 32,100,000	$ 35,800,000
Income taxes paid, net of refunds	29,000,000.0	34,100,000
Net interest payments allocated to discontinued operations		0
Non-cash additions to property, plant and equipment	$ 12,500,000	$ 600,000