Common stock, dividend rights

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Number of classes of common stock with material number of shares outstanding.

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Number of share-based compensation arrangement plans.

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- Definition

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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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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Amount of cumulative effect of the change in accounting principle or new accounting pronouncement on retained earnings or other components of equity or net assets in the statement of financial position as of the beginning of the earliest period presented.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Description of Business, Basis of Presentation and Summary of Significant Accounting Policies (Details Textual) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Feb. 28, 2018 USD ($) stock_based_compensation_plan class_of_stock $ / shares	Nov. 30, 2017 $ / shares	Aug. 31, 2017 $ / shares	May 31, 2017 $ / shares	Feb. 28, 2017 USD ($) $ / shares	Nov. 30, 2016 $ / shares	Aug. 31, 2016 $ / shares	May 31, 2016 $ / shares	Feb. 28, 2018 USD ($) stock_based_compensation_plan class_of_stock $ / shares	Feb. 28, 2017 USD ($) $ / shares	Feb. 29, 2016 USD ($) $ / shares	Mar. 01, 2018 USD ($)
Class of Stock [Line Items]
Number of classes of common stock with a material number of shares outstanding \| class_of_stock	2								2
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Provision for income taxes									$ 11.9	$ 554.2	$ 440.6
Deferred tax assets adjustment	$ 210.6				$ 231.7				210.6	231.7
Advertising expense									$ 615.7	$ 552.8	$ 468.3
Number of stock-based employee compensation plans \| stock_based_compensation_plan	2								2
Class A Common Stock [Member]
Class of Stock [Line Items]
Common stock, dividend rights									10.00%
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income per common share attributable to CBI – diluted \| $ / shares	$ 4.64	$ 2.44	$ 2.48	$ 2.00	$ 2.26	$ 1.98	$ 1.75	$ 1.55	$ 11.55	$ 7.52	$ 5.18
Accounting Standards Update 2016-09, Stock-based employee compensation [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Provision for income taxes									$ (68.6)
Net income per common share attributable to CBI – diluted \| $ / shares									$ 0.07
Accounting Standards Update 2014-09, Revenue recognition [Member] \| Subsequent Event [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Opening retained earnings adjustment												$ (50.0)
Accounting Standards Update 2016-16, Income taxes [Member] \| Subsequent Event [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Opening retained earnings adjustment												$ 2,200.0