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Employee service share based compensation tax deficiencies realized from exercise of stock options.

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Fair value of replacement awards

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Percentage of Entity Public Float as of May 31, 2017

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Post-combination service of replacement awards

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Stock repurchased, amount charged against retained earnings

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Amount of cash inflow from exercise of option under share-based payment arrangement.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Date the equity-based award expires, in CCYY-MM-DD format.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Net number of share options (or share units) granted during the period.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

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Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Capital Stock - Additional Information (Details)	12 Months Ended
Capital Stock - Additional Information (Details)	Feb. 29, 2020 USD ($) tranche shares	Feb. 28, 2019 USD ($) tranche $ / shares shares	Feb. 28, 2018 USD ($) shares	Mar. 26, 2020 shares	Feb. 21, 2019 USD ($)	Jun. 23, 2017 shares	Feb. 28, 2017 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares in the equity pool available for future grants \| shares	4,000,000
Stock repurchased and charged against retained earnings \| $			$ 9,000,000
Fair value of replacement awards \| $		$ 39,000,000
Pre-combination service of replacement awards included in purchase consideration \| $					$ 21,000,000
Post-combination service of replacement awards \| $		18,000,000
Post-combination service of replacement awards, unrecognized expense \| $	$ 6,000,000	18,000,000
Stock Repurchase Program, Number of Shares Authorized to be Repurchased \| shares						31,000,000
Percentage of Entity Public Float as of May 31, 2017						6.40%
Stock Repurchased During Period, Shares \| shares			2,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Date	Nov. 03, 2023
Common shares repurchased \| $	$ 0	$ 0	$ 18,000,000
Stock Repurchased and Retired During Period, Value \| $			18,000,000
Common shares or awards outstanding \| shares	554,199,016	547,357,972
Option vesting period	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value \| $	$ 4.30	$ 2.55	$ 2.89
Conversion of stock (in shares) \| shares	60,500,000	60,500,000	60,500,000
Equity Award, Number Of Vesting Tranches \| tranche	5	5
Capital Stock and Additional Paid-In Capital [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Repurchased and Retired During Period, Value \| $			$ 9,000,000
Common shares or awards outstanding \| shares	554,199,000	547,358,000	536,734,000				530,497,000
Voting Common Stock [Member] \| Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares or awards outstanding \| shares				554,000,000
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense \| $	$ 5,000,000	$ 1,000,000	$ 1,000,000
Unrecognized compensation expense related to restricted share unit plan \| $	$ 4,000,000
Weighted-average vesting period related to unrecognized share-based compensation on unvested awards	1 year 6 months 21 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value \| $	$ 25,000,000	1,000,000	1,000,000
Cash received from stock options \| $	3,000,000	1,000,000	4,000,000
Employee Service Share Based Compensation Tax Deficiencies Realized From Exercise Of Stock Options \| $	$ 0	$ 0	$ 0
Number of awards granted \| shares	0	8,320,130	0
Option vesting period		3 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		5 years
Employee Stock Option [Member] \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant date fair value of stock options granted during the periods (usd per share) \| $ / shares		$ 3.97
Risk-free interest rates		2.50%
Expected life in years		3 years 10 months 28 days
Volatility		37.00%
Employee Stock Option [Member] \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant date fair value of stock options granted during the periods (usd per share) \| $ / shares		$ 7.48
Risk-free interest rates		2.56%
Expected life in years		6 years 1 month 28 days
Volatility		40.00%
Employee Stock Option [Member] \| Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares or awards outstanding \| shares				6,000,000
Restricted Share Units (RSUs) \| Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares or awards outstanding \| shares				24,000,000
Deferred Share Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred share units issued \| shares	270,164
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number \| shares	1,100,000	800,000
Liability related to deferred share unit plan \| $	$ 6,000,000	$ 7,000,000
Deferred Share Unit \| Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares or awards outstanding \| shares				1,000,000
Replacement award [Member] \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting period		3 months
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		5 years
Replacement award [Member] \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting period		4 years
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		10 years
Replacement award [Member] \| Restricted Share Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants during the period, Number \| shares		824,046
Inducement Awards [Member] \| Restricted Share Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants during the period, Number \| shares	4,182,189