Stock Compensation Plans (Details 6) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Stock-Based Compensation Expense
Total stock-based compensation expense	$ 789,138	$ 794,818	$ 618,655
Cost of revenues
Stock-Based Compensation Expense
Total stock-based compensation expense	86,247	79,968	56,437
Research and development
Stock-Based Compensation Expense
Total stock-based compensation expense	339,624	327,065	271,120
Sales and marketing
Stock-Based Compensation Expense
Total stock-based compensation expense	247,505	246,447	198,346
General and administrative
Stock-Based Compensation Expense
Total stock-based compensation expense	$ 115,762	$ 141,338	$ 92,752