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Acquisitions, Disposals, and Related Items	3 Months Ended
Acquisitions, Disposals, and Related Items	Apr. 30, 2016
Business Combinations [Abstract]
Acquisitions, disposals, and related items	Acquisitions, Disposals and Related Items In July 2015, the Company completed the purchase of all of the remaining noncontrolling interest in Yihaodian, our e-commerce operations in China, for approximately $760 million, using existing cash to complete this transaction.