Accumulated Other Comprehensive Income - Additional Information (Details) - USD ($)	6 Months Ended
Jul. 31, 2022	Jul. 31, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Amount reclassified from accumulated other comprehensive income/(loss)	$ 1,000,000.0	$ 0

Amount after tax of reclassification adjustments of other comprehensive income (loss).

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration