Commitments and Contingencies (Narrative) (Details) $ in Millions			3 Months Ended
	Jan. 18, 2018 USD ($)	Sep. 26, 2016 USD ($)	Mar. 31, 2021 USD ($)	Jan. 20, 2021 defendant	Jul. 22, 2020 legal_matter
Loss Contingencies [Line Items]
Increase (decrease) in contractual obligations not reflected in the balance sheet			$ 30.6
Contractual obligation			$ 1,042.5
California Action
Loss Contingencies [Line Items]
Number of legal matters | legal_matter					7
Number of defendants eliminated | defendant				8
Minimum
Loss Contingencies [Line Items]
Claim for damages		$ 280.0
Threatened Litigation
Loss Contingencies [Line Items]
Claim for damages	$ 20.0