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Stockholders Equity (Details) - USD ($)	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020
Total stock-based compensation	$ 1,726,893,000,000	$ (377,187,000,000)
Stock Option [Member]
Total stock-based compensation	58,183,000,000	27,577,000,000
Restricted Stock Program
Total stock-based compensation	1,668,710,000,000	(404,764,000,000)
2017 Plan [Member]
Total stock-based compensation	1,726,893,000,000	(402,746,000,000)
Stock appreciation rights	0	(25,559,000,000)
Total income tax benefit recognized for stock-based compensation arrangements	$ 362,647,000,000	$ (85,577,000,000)

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(1)(i)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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