Income Taxes (Reconciliation of U.S. Federal Tax to Effective Tax Rate) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Effective tax rate reconciliation
Statutory U.S. federal tax rate	21.00%	21.00%	21.00%
Increase (decrease) in rate resulting from:
State and local income taxes, net of related federal taxes	4.60%	7.30%	3.40%
U.S. tax rate change and other tax law impacts	60.20%	2.10%	(1.50%)
Effect of noncontrolling interest	(18.80%)	2.40%	0.10%
Derivative instruments and hedging activities	(13.00%)	0.00%	0.00%
Income taxes on foreign earnings	(6.80%)	(0.60%)	(1.50%)
Nondeductible compensation	(6.10%)	4.60%	1.50%
Release (accrual) of unrecognized tax benefits	2.70%	3.90%	(0.10%)
Tax effect of GILTI	0.00%	0.40%	1.40%
Research and development and other tax credits	0.014	(0.232)	(0.034)
Equity method investments	(0.10%)	5.70%	1.10%
Acquisition related permanent item	0.00%	24.00%	0.00%
Other, net	(3.20%)	(1.20%)	0.50%
Effective tax rate	41.90%	46.40%	22.50%
COVID-19 Pandemic
Increase (decrease) in rate resulting from:
U.S. tax rate change and other tax law impacts	$ 14.8