Taxes - Significant Differences Between United States Federal Statutory Tax Rate and Company's Effective Tax Rate (Details)	12 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Apr. 02, 2016
Income Tax Disclosure [Abstract]
Provision for income taxes at the U.K. (2018-2017), U.S. (2016) statutory tax rate	19.00%	20.00%	35.00%
State and local income taxes, net of federal benefit	0.50%	1.30%	1.20%
Effects of global financing arrangements	(15.60%)	(13.70%)	(2.80%)
U.S. tax reform	2.00%	0.00%	0.00%
Differences in tax effects on foreign income	6.70%	11.10%	(5.10%)
Foreign tax credit	(0.00%)	0.30%	(0.20%)
Liability for uncertain tax positions	6.60%	0.00%	0.00%
Effect of changes in valuation allowances on deferred tax assets	0.30%	0.50%	(0.20%)
Withholding tax	1.20%	0.00%	0.00%
Other	(0.50%)	0.40%	0.60%
Effective tax rate	20.20%	19.90%	28.50%