Legal Proceedings Legal Proceedings (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2021	Dec. 31, 2020
Legal Proceedings [Line Items]
Legal Settlement, Amount of Future Award		$ 237.0
Deferred Prosecution Agreement Liability - Total Obligation		2,510.0
Deferred Prosecution Agreement Liability			$ 744.0
Controlling Interest Ownership Percentage After Acquisition	80.00%
Payments to Acquire Interest in Joint Venture	$ 4,200.0
Criminal Monetary Penalty [Member]
Legal Proceedings [Line Items]
Deferred Prosecution Agreement Liability		244.0
Beneficiary Compensation [Member]
Legal Proceedings [Line Items]
Deferred Prosecution Agreement Liability		500.0
Contingent On Customer Negotiations [Member]
Legal Proceedings [Line Items]
Deferred Prosecution Agreement Liability		1,770.0
Total Criminal Monetary Penalty and Beneficiary Compensation [Member]
Legal Proceedings [Line Items]
Deferred Prosecution Agreement Liability		$ 744.0