Income Taxes Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent	990.60%	22.20%
Effective Tax Rate Reconciliation, at Federal Statutory Rate without CARES Act, Percent	47.70%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%		35.00%
Tax Adjustments, Settlements, and Unusual Provisions	$ 154.7
Income Taxes Paid, Net	2.3
Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions	$ 303.0