Summary of Significant Accounting Policies Property, Plant, and Equipment (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Change in Accounting Estimate [Line Items]
Depreciation and amortization	$ 66.9	$ 67.5
Earnings Per Share, Basic	$ 1.36	$ 0.23
Earnings Per Share, Diluted	$ 1.33	$ 0.23
Service Life [Member]
Change in Accounting Estimate [Line Items]
Depreciation and amortization	$ 7.7
Depreciation, Amortization and Accretion, Net	$ 5.9
Earnings Per Share, Basic	$ 0.05
Earnings Per Share, Diluted	$ 0.05