Income Taxes (Reconciliation of U.S. Federal Tax to Effective Tax Rate) (Details)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Effective tax rate reconciliation
Statutory U.S. federal tax rate	21.00%	35.00%	35.00%
Increase (decrease) in rate resulting from:
State and local income taxes, net of related federal taxes	3.40%	(4.20%)	5.80%
Federal income tax credits	(3.40%)	0.00%	(7.30%)
Change in federal and state tax rates	(2.10%)	374.80%	0.00%
Income taxes on foreign earnings	(1.50%)	(2.20%)	(1.30%)
Nondeductible compensation	1.50%	(2.50%)	2.00%
Tax effect of GILTI	1.40%	0.00%	0.00%
Equity Method Investments	1.10%	(0.40%)	0.30%
Impacts related to the 2017 Tax Act	0.60%	(7.10%)	0.00%
Other, net	0.50%	4.40%	(0.80%)
Release (accrual) of unrecognized tax benefits	(0.10%)	3.00%	0.10%
Effect of noncontrolling interest	0.10%	0.20%	(4.70%)
Goodwill impairment	0.00%	(93.50%)	0.00%
Tax associated with accrued and unpaid dividends	0.00%	0.10%	3.20%
Effective tax rate	22.50%	307.60%	32.30%