Contingencies (Narratives) (Details) - Covid 19 Pandemic $ in Millions	12 Months Ended
Mar. 31, 2020 USD ($)
Unusual Or Infrequent Item Net Gain Loss [Abstract]
Decline in product and service revenue, percentage	30.00%
Revenue loss due to pandemic	$ 39.5
CARES act, refund estimate	$ 381.0

Amount, before deduction of insurance proceeds, of loss recognized in the income statement for an event or transaction that is unusual in nature or infrequent in occurrence, or both.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=114868883&loc=SL114871943-224233

Name:	us-gaap_UnusualOrInfrequentItemLossGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration