Income Taxes - Tax Reform (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
Apr. 29, 2018	Apr. 28, 2019	Apr. 29, 2018	Oct. 28, 2018
U.S. Tax Reform
Federal corporate statutory tax rate (as a percent)		21.00%		23.30%
Net deferred tax liability remeasement	$ (18.5)		$ (322.4)	$ (362.9)
Deemed earnings repatriation tax	0.1		15.7	$ 20.6
Total discrete tax (benefit) expense	$ (18.4)		$ (306.7)

Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section S99
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-URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319

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