Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Jan. 31, 2018

Jan. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

	2017 Quarters Ended*
(in millions, except per share amounts)	April 30		July 31		October 31		January 31 a
Net sales	$	899.6	$	959.7	$	976.2	$	1,334.3
Gross profit	557.6		598.2		598.4		850.6
Earnings from operations	145.6		181.3		160.3		307.2
Net earnings	92.9		115.0		100.2		61.9
Net earnings per share:
Basic	$	0.75	$	0.92	$	0.81	$	0.50
Diluted	$	0.74	$	0.92	$	0.80	$	0.50

^a  For the quarter ended January 31, 2018, includes net tax expense of $146.2 million, or $1.17 per diluted share, related to the estimated impact of the 2017 Tax Act (see "Note O. Income Taxes").

	2016 Quarters Ended*
(in millions, except per share amounts)	April 30		July 31		October 31		January 31 b
Net sales	$	891.3	$	931.6	$	949.3	$	1,229.6
Gross profit	545.6		577.1		579.5		788.2
Earnings from operations	134.6		174.9		155.2		256.5
Net earnings	87.5		105.7		95.1		157.8
Net earnings per share:
Basic	$	0.69	$	0.84	$	0.76	$	1.27
Diluted	$	0.69	$	0.84	$	0.76	$	1.26

^b  On a pre-tax basis, includes charges for the quarter ended January 31, 2017 of:

i. $25.4 million, which reduced net earnings per diluted share by $0.13, associated with an impairment charge related to software costs capitalized in connection with the development of a new finished goods inventory management and merchandising information system (see "Note B. Summary of Significant Accounting Policies" and "Note E. Property, Plant and Equipment"); and

ii. $12.6 million, which reduced net earnings per diluted share by $0.06, associated with impairment charges related to financing arrangements with diamond mining and exploration companies (see "Note B. Summary of Significant Accounting Policies").

* The sum of quarterly amounts may not agree with full year amounts due to rounding.