Share Repurchases (Tables)

3 Months Ended

Apr. 30, 2018

Class of Stock Disclosures [Abstract]

Schedule of Company's share repurchases

The following table provides, on a settlement date basis, the number of shares repurchased, average price paid per share and total amount paid for share repurchases for the three months endedApril 30, 2018 and 2017:

	Three Months Ended April 30,
(Amounts in millions, except per share data)	2018		2017
Total number of shares repurchased	5.5		31.1
Average price paid per share	$	97.75	$	70.25
Total amount paid for share repurchases	$	539	$	2,185