Segment Information - Company's Segments Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2015	Jul. 31, 2014	Jul. 31, 2015	Jul. 31, 2014
Net sales:
Net sales	$ 990.5	$ 992.9	$ 1,953.0	$ 2,005.1
Earnings from operations:
Segment Reporting Earnings Losses From Continuing Operations Before Unallocated Corporate Expenses Interest	222.5	242.0	428.7	486.1
Americas [Member]
Net sales:
Net sales	474.6	483.6	918.3	922.3
Earnings from operations:
Segment Reporting Earnings Losses From Continuing Operations Before Unallocated Corporate Expenses Interest	94.8	109.8	167.1	191.3
Asia-Pacific [Member]
Net sales:
Net sales	245.3	236.8	504.3	497.7
Earnings from operations:
Segment Reporting Earnings Losses From Continuing Operations Before Unallocated Corporate Expenses Interest	56.8	65.5	129.5	137.3
Japan [Member]
Net sales:
Net sales	125.5	119.1	247.3	293.0
Earnings from operations:
Segment Reporting Earnings Losses From Continuing Operations Before Unallocated Corporate Expenses Interest	46.1	39.2	89.8	110.7
Europe [Member]
Net sales:
Net sales	122.6	120.0	225.4	221.3
Earnings from operations:
Segment Reporting Earnings Losses From Continuing Operations Before Unallocated Corporate Expenses Interest	23.0	25.1	37.0	42.1
Reportable Geographical Components [Member]
Net sales:
Net sales	968.0	959.5	1,895.3	1,934.3
Earnings from operations:
Segment Reporting Earnings Losses From Continuing Operations Before Unallocated Corporate Expenses Interest	220.7	239.6	423.4	481.4
Other [Member]
Net sales:
Net sales	22.5	33.4	57.7	70.8
Earnings from operations:
Segment Reporting Earnings Losses From Continuing Operations Before Unallocated Corporate Expenses Interest	$ 1.8	$ 2.4	$ 5.3	$ 4.7