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Restructuring and Related Costs - Cumulative Restructuring and Related Charges (Details) $ in Millions	Jan. 31, 2019 USD ($)
Restructuring Cost and Reserve [Line Items]
Cumulative charges	$ 93.6
GCA Restructuring Program
Restructuring Cost and Reserve [Line Items]
Cumulative charges	27.1
2020 Vision Restructuring Program
Restructuring Cost and Reserve [Line Items]
Cumulative charges	66.5
External Support Fees
Restructuring Cost and Reserve [Line Items]
Cumulative charges	32.0
External Support Fees | GCA Restructuring Program
Restructuring Cost and Reserve [Line Items]
Cumulative charges	2.0
External Support Fees | 2020 Vision Restructuring Program
Restructuring Cost and Reserve [Line Items]
Cumulative charges	30.0
Employee Severance
Restructuring Cost and Reserve [Line Items]
Cumulative charges	27.8
Employee Severance | GCA Restructuring Program
Restructuring Cost and Reserve [Line Items]
Cumulative charges	14.8
Employee Severance | 2020 Vision Restructuring Program
Restructuring Cost and Reserve [Line Items]
Cumulative charges	13.0
Other Project Fees
Restructuring Cost and Reserve [Line Items]
Cumulative charges	21.0
Other Project Fees | GCA Restructuring Program
Restructuring Cost and Reserve [Line Items]
Cumulative charges	10.3
Other Project Fees | 2020 Vision Restructuring Program
Restructuring Cost and Reserve [Line Items]
Cumulative charges	10.7
Lease Exit
Restructuring Cost and Reserve [Line Items]
Cumulative charges	7.7
Lease Exit | GCA Restructuring Program
Restructuring Cost and Reserve [Line Items]
Cumulative charges	0.0
Lease Exit | 2020 Vision Restructuring Program
Restructuring Cost and Reserve [Line Items]
Cumulative charges	7.7
Asset Impairment
Restructuring Cost and Reserve [Line Items]
Cumulative charges	5.2
Asset Impairment | GCA Restructuring Program
Restructuring Cost and Reserve [Line Items]
Cumulative charges	0.0
Asset Impairment | 2020 Vision Restructuring Program
Restructuring Cost and Reserve [Line Items]
Cumulative charges	$ 5.2

X

- Definition

Amount of costs incurred to date for the specified restructuring cost.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.P.4(d))
-URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.P.4(b)(1))
-URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747

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+ References

No definition available.

+ Details

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