Commitments and Contingencies - Additional Information (Details) - Panasonic Corporation [Member] $ in Millions	12 Months Ended
Feb. 28, 2019 USD ($)
Results of Arbitrations and Legal Proceedings [Line Items]
Gain (Loss) Related to Litigation Settlement	$ 12
Litigation Settlement, Expense	$ 3

Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

Name:	us-gaap_GainLossRelatedToLitigationSettlement
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration