Description Of Business And Summary Of Significant Accounting Policies (Fiscal Periods) (Details)	12 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2016
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Current and Prior Years Fiscal Period (in weeks)	52	52	53
Minimum [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Fiscal Year (in weeks)	52
Maximum [Member]
Description Of Business And Summary Of Significant Accounting Policies [Line Items]
Fiscal Year (in weeks)	53