Supplemental Cash Flow Information - (Tables)

12 Months Ended

Jan. 31, 2019

Supplemental Cash Flow Information [Abstract]

Supplemental Cash Flow Information-Schedule of Cash Paid During Year

Cash paid during the year for:

	Years Ended January 31,
(in millions)	2019		2018		2017
Interest, net of interest capitalization	$	40.6	$	41.5	$	40.6
Income taxes	$	291.4	$	156.2	$	213.9

Supplemental Cash Flow Information - Supplemental Noncash Investing and Financing Activities

Supplemental noncash investing and financing activities:

	January 31,
(in millions)	2019		2018		2017
Accrued capital expenditures	$	11.0	$	20.1	$	10.7