Acquisitions and Divestitures (Narrative) (Details) $ in Millions		3 Months Ended			6 Months Ended
	Dec. 31, 2017 USD ($)	Apr. 01, 2018 USD ($) store	Oct. 01, 2017 USD ($)	Apr. 02, 2017 USD ($)	Apr. 01, 2018 USD ($) store	Apr. 02, 2017 USD ($)
Business Acquisition [Line Items]
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months		$ 58.8		$ 14.0	$ 72.8	$ 28.5
Gain resulting from acquisition of joint venture		47.6		0.0	1,373.9	0.0
Goodwill		3,793.5	$ 1,539.2		3,793.5
Brazil Retail Operations [Member]
Business Acquisition [Line Items]
Sale of Ownership Interest in Retail Business		$ 48.2
Gain/(loss) resulting from divestiture		8.5
Taiwan JV [Member]
Business Acquisition [Line Items]
Sale of Ownership Interest in Retail Business		$ 181.2
Gain/(loss) resulting from divestiture		156.6
East China JV [Member]
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue		$ 6.0		5.5	12.4	11.5
Business Acquisition, Effective Date of Acquisition	Dec. 31, 2017
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months		44.4
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year		90.0			90.0
Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Two		180.1			180.1
Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Two		180.1			180.1
Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Four		180.1			180.1
Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Five		172.9			$ 172.9
Goodwill, Foreign Currency Translation Gain (Loss)		$ 78.8
Preexisting ownership percentage in equity method investment		50.00%			50.00%
Amount paid for interest acquired		$ 1,400.0
Amount of payable settled	$ 1,440.8
Gain resulting from acquisition of joint venture		1,400.0		0.0		1,400.0
Acquisition-related costs, including integration costs				8.7		12.4
Business Combination, Acquisition Related Costs		0.4			$ 2.9
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value	1,440.8	1,400.0
Business Combination, Separately Recognized Transactions, Liabilities Recognized		$ 86.3			$ 86.3
Number of stores | store		1,400			1,400
Business Combination, Consideration Transferred, Including Equity Interest in Acquiree Held Prior to Combination	2,967.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents		$ 129.5			$ 129.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables		14.3			14.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory		15.9			15.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets		20.6			20.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment		253.9			253.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets		44.6			44.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		818.0			818.0
Goodwill		2,158.1			2,158.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets		3,454.9			3,454.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable		43.1			43.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities		177.3			177.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue		21.7			21.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities		244.9			244.9
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities		487.0			487.0
Operating Leases, Future Minimum Payments Due, Next Twelve Months		72.2			72.2
Operating Leases, Future Minimum Payments, Due in Rolling Year Two		62.6			62.6
Operating Leases, Future Minimum Payments, Due in Rolling Year Three		53.7			53.7
Operating Leases, Future Minimum Payments, Due in Rolling Year Four		46.6			46.6
Operating Leases, Future Minimum Payments, Due in Rolling Year Five		37.0			37.0
Operating Leases, Future Minimum Payments, Due Thereafter		80.5			80.5
Operating Leases, Future Minimum Payments Due		352.6			352.6
Business Acquisition, Pro Forma Net Income (Loss)		0.6		$ 0.8	$ 1.7	$ 2.6
East China revenue included in consolidated statements of earnings		301.6
East China net earnings included in consolidated statements of earnings		$ 26.2
Tazo business [Member]
Business Acquisition [Line Items]
Gain/(loss) resulting from divestiture		347.9
Proceeds from Divestiture of Businesses		$ 383.8
Taiwan JV [Member]
Business Acquisition [Line Items]
Preexisting ownership percentage in equity method investment		50.00%			50.00%
Singapore Retail Operations [Member]
Business Acquisition [Line Items]
Sale of Ownership Interest in Retail Business			$ 119.9
Gain/(loss) resulting from divestiture			83.9
Acquired and reacquired rights | East China JV [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired	$ 798.0
Scenario, Adjustment [Member] | East China JV [Member]
Business Acquisition [Line Items]
Gain resulting from acquisition of joint venture		$ 0.0
Goodwill		$ 21.0			$ 21.0