Acquisitions and Divestitures (Narrative) (Details) $ in Millions		3 Months Ended
	Dec. 31, 2017 USD ($) store	Apr. 01, 2018 USD ($)	Dec. 31, 2017 USD ($) store	Oct. 01, 2017 USD ($)	Jan. 01, 2017 USD ($)
Business Acquisition [Line Items]
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain			$ 1,326.3		$ 0.0
Purchase price of joint venture sold			129.5		0.0
Goodwill	$ 3,674.8		3,674.8	$ 1,539.2
Taiwan JV [Member]
Business Acquisition [Line Items]
Sale of Ownership Interest in Retail Business			$ 177.6
Gain/(loss) resulting from divestiture			153
Taiwan JV [Member] | Subsequent Event [Member]
Business Acquisition [Line Items]
Purchase price of joint venture sold		$ 161.6
East China JV [Member]
Business Acquisition [Line Items]
Business Acquisition, Pro Forma Revenue			$ 6,344.7		5,948.0
Business Acquisition, Effective Date of Acquisition	Dec. 31, 2017
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	$ 130.3		130.3
Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Two	173.7		173.7
Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Two	173.7		173.7
Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Four	173.7		173.7
Finite-Lived Intangible Assets, Amortization Expense, Rolling Year Five	$ 166.6		$ 166.6
Preexisting ownership percentage in equity method investment	50.00%		50.00%
Amount paid for interest acquired			$ 1,400.0
Amount of payable settled	$ 1,431.0
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain			1,300.0
Acquisition-related costs, including integration costs			3.7
Business Combination, Acquisition Related Costs			2.5
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value	1,431.0		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	$ 2,948.3
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	18.0		18.0
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	256.6		256.6
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Assets	35.7		35.7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	818.0		818.0
Goodwill	2,137.1		2,137.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets	3,429.8		3,429.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable	43.2		43.2
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities	173.8		173.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Deferred Revenue	18.0		18.0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities	246.5		246.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities	481.5		481.5
Operating Leases, Future Minimum Payments Due, Next Twelve Months	69.6		69.6
Operating Leases, Future Minimum Payments, Due in Rolling Year Two	60.6		60.6
Operating Leases, Future Minimum Payments, Due in Rolling Year Three	52.2		52.2
Operating Leases, Future Minimum Payments, Due in Rolling Year Four	45.8		45.8
Operating Leases, Future Minimum Payments, Due in Rolling Year Five	37.0		37.0
Operating Leases, Future Minimum Payments, Due Thereafter	83.5		83.5
Operating Leases, Future Minimum Payments Due	$ 348.7		348.7
Business Acquisition, Pro Forma Net Income (Loss)			$ 1,122.8		$ 1,799.2
East China JV [Member] | Subsequent Event [Member]
Business Acquisition [Line Items]
Amount of payable settled		$ 1,300.0
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
Contract-Based Intangible Assets [Member] | East China JV [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired	$ 798.0