Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details)	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Income Tax Disclosure [Abstract]
U.S. federal statutory tax rate	21.00%	31.50%	35.00%
State income taxes, net of federal benefit	0.20%	0.10%	0.30%
Dividends received from deconsolidated operations	0.00%	(1.40%)	(2.30%)
Foreign earnings taxed at rates other than the U.S. federal statutory tax rate	7.10%	2.80%	0.00%
Foreign dividend withholding taxes	3.70%	(0.20%)	0.00%
Reversal of dividend withholding tax due to foreign subsidiary tax holiday	(5.10%)	0.00%	0.00%
Adjustment of deferred tax assets and liabilities to lower tax rate	0.00%	4.60%	0.00%
Reduction of U.S. tax liability on undistributed foreign earnings to amounts payable under one-time transition tax	0.00%	(8.30%)	0.00%
Other, including changes in liabilities recorded for uncertain tax positions	0.30%	1.20%	0.50%
Effective income tax rate	27.20%	30.30%	33.50%