Income Taxes (Effective Tax Rate Reconciliation) (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Statutory federal rate	21.00%	21.00%	21.00%
State and local taxes, net of federal tax benefit	(0.20%)	(2.70%)	2.20%
Tax on foreign income	(1.80%)	62.10%	(16.20%)
Tax on uncertain tax positions - Brazil	(2.80%)	8.10%	67.40%
Tax on uncertain tax positions - Rest of World	3.90%	8.50%	8.50%
Reorganizations	(10.00%)	185.60%	(91.30%)
Net change in valuation allowances	(21.40%)	(208.00%)	128.30%
Research credits	0.40%	(0.90%)	(1.30%)
Other	(0.30%)	0.80%	1.60%
Effective tax rate	(11.20%)	74.50%	120.20%