Description Of Business And Basis of Presentation (Fiscal Periods) (Details)	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2017
Description Of Business And Basis of Presentation [Line Items]
Current and Prior Years Fiscal Period (in weeks)	52	52	52
Minimum [Member]
Description Of Business And Basis of Presentation [Line Items]
Fiscal Year (in weeks)	52
Maximum [Member]
Description Of Business And Basis of Presentation [Line Items]
Fiscal Year (in weeks)	53