Fair Value Measurements Text Tag (Details)	12 Months Ended
Mar. 31, 2018 USD ($)
Fair Value Disclosures [Abstract]
Percent of Total Assets Level 3	0.10%
Fair Value, Measurement with Unobservable Inputs, Recurring Basis, Asset, Transfers, Net	$ 0

Amount of transfer of financial instrument classified as an asset into (out of) level 3 of the fair value hierarchy.

No definition available.

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