Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
Dec. 28, 2018	Dec. 29, 2017
Income Tax Disclosure [Abstract]
United States income taxes	$ 29.5	$ 304.9
Foreign income taxes	9.4	10.3
Provision for income taxes	$ 38.9	$ 315.2
Effective tax rate	12.00%	81.70%

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Amount of current foreign income tax expense (benefit) pertaining to income (loss) from continuing operations.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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