Shareholders' Equity - Schedule of Share Repurchases (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2022
Equity [Abstract]
Total number of shares repurchased (in shares)	54.6	221.8	209.1
Average price paid per share (in USD per share)	$ 50.87	$ 44.72	$ 46.82
Total cash paid for share repurchases	$ 2,779.0	$ 9,920.0	$ 9,787.0