Acquisitions Acquisitions (Narrative) (Details) shares in Thousands, € in Millions, $ in Millions, $ in Millions		3 Months Ended						9 Months Ended	12 Months Ended						24 Months Ended
	Aug. 17, 2017 shares	Nov. 30, 2018 USD ($)	Aug. 31, 2018 USD ($)	May 31, 2018 USD ($)	Feb. 28, 2018 USD ($)	Nov. 30, 2017 USD ($)	Nov. 30, 2011 USD ($)	Aug. 31, 2017 USD ($)	Nov. 30, 2018 USD ($) shares	Nov. 30, 2017 EUR (€)	Nov. 30, 2017 USD ($)	Aug. 17, 2017 USD ($)	Nov. 30, 2016 AUD ($)	Nov. 30, 2016 USD ($)	Nov. 30, 2018 USD ($)
Business Acquisition [Line Items]
Transaction expenses included in cost of goods sold						$ 15.0		$ 5.9
Useful life									11 years
Goodwill		$ 4,527.9				4,490.1			$ 4,527.9		$ 4,490.1				$ 4,527.9
Other debt costs									0.0		15.4			$ 0.0
Total		0.4	$ 5.6	$ 7.8	$ 8.7	$ 31.3		$ 30.4	22.5
Intangible asset amortization expense									20.6		16.3			11.3
Purchase of minority interest									13.0		1.2			0.0
Payments of contingent consideration									2.5		19.7			0.0
Reckitt Benckiser's Food Division [Member]
Business Acquisition [Line Items]
Changes in preliminary purchase price allocation									102.2
Working capital adjustments									4.2
Net sales											5,209.0	$ 570.0		4,969.3
Transaction expenses included in cost of goods sold											20.9			20.9
Indefinite-lived brand assets		2,320.0							2,320.0						2,320.0
Definite-lived intangible assets		110.0							$ 110.0						110.0
Useful life									15 years
Goodwill		2,648.5							$ 2,648.5						2,648.5
Business Combination, Separately Recognized Transactions, Expenses and Losses Recognized									0.3		23.2				59.8
Business Combination, Integration Related Costs									22.2		17.6				39.8
Other debt costs											15.4			15.4
Revenue from acquisition											190.1
Total									22.5		77.1				99.6
Earnings or loss of acquiree since acquisition date, actual											42.0
Amortization and depreciation									7.3
Finite-lived intangible assets, purchase accounting adjustments									10.0
Deferred Tax Assets, Goodwill and Intangible Assets		$ 60.9							60.9						$ 60.9
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, tangible assets									1.9
Payments to acquire businesses, net of cash acquired											4,210.0
Cash acquired from acquisition											$ 24.3
Indefinite-lived intangible assets, purchase accounting adjustments									$ 155.0
Reckitt Benckiser's Food Division [Member] | Common Class A [Member]
Business Acquisition [Line Items]
Equity issued to fund acquisition (in shares) | shares	6,350								6,350
Reckitt Benckiser's Food Division [Member] | Selling, General and Administrative Expenses [Member]
Business Acquisition [Line Items]
Total														40.8
Shanghai [Member]
Business Acquisition [Line Items]
Ownership interest		10.00%							10.00%						10.00%
Buyout of minority interest									$ 12.4
Purchase of minority interest									12.7
Kohinoor Specialty Foods [Member]
Business Acquisition [Line Items]
Ownership interest						15.00%					15.00%
Buyout of minority interest											$ 0.6
Payments to acquire businesses, net of cash acquired											1.5
Purchase of minority interest									$ 0.3		1.2
Consideration transferred							$ 113.0
Giotti [Member]
Business Acquisition [Line Items]
Net sales | €										€ 53
Goodwill						$ 80.5					80.5
Revenue from acquisition											66.5
Payments to acquire businesses, net of cash acquired											123.8
Cash acquired from acquisition											1.2
Gourmet Garden [Member]
Business Acquisition [Line Items]
Net sales													$ 70
Revenue from acquisition											$ 27.3
Payments to acquire businesses, net of cash acquired														116.2
Cash acquired from acquisition														$ 3.3