Business Segments, Significant Customer and Geographic Information - Narrative (Details) - Agriculture and Weather Analytics Segment $ in Millions	12 Months Ended
Mar. 31, 2021 USD ($)
Business Segments
Disposal group, including discontinued operation, consideration	$ 12.0
Restructuring costs	$ 1.5

Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

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