Summary of Significant Accounting Policies Property, Plant, and Equipment (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Change in Accounting Estimate [Line Items]
Depreciation and amortization			$ 134.6	$ 138.1
Earnings Per Share, Basic	$ (1.76)	$ 0.28	$ (0.38)	$ 0.51
Earnings Per Share, Diluted	$ (1.76)	$ 0.28	$ (0.38)	$ 0.51
Service Life [Member]
Change in Accounting Estimate [Line Items]
Depreciation and amortization	$ 7.7		$ 15.4
Depreciation, Amortization and Accretion, Net	$ 5.9		$ 11.8
Earnings Per Share, Basic	$ 0.05		$ 0.10
Earnings Per Share, Diluted	$ 0.05		$ 0.10