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Stock-based compensation expense, estimated expected forfeitures

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Aggregate proceeds received by the entity during the annual period from exercises of stock or unit options and conversion of similar instruments granted under equity-based payment arrangements.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Percentage of vesting of share-based compensation awards.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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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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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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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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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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Number of non-vested options outstanding.

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Number of options vested.

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Share-Based Compensation - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Mar. 28, 2015 OptionPlan EquityPlan	Mar. 29, 2014	Mar. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of equity plans	2
Number of share option grant types	2
Outstanding options unvested	3,821,257
Outstanding options vested	3,365,746
Intrinsic value of options exercised	$ 131.6	$ 163.2
Cash received from options exercised	15.3	19.0
Weighted average grant date fair value of option	$ 27.96	$ 24.95	$ 20.66
Equity compensation expense	48.9	29.1	20.9
Share-based compensation, income tax benefits recognized	17.5	11.5	8.1
Estimated value of future forfeitures	1.3
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock based compensation expense	28.8
Weighted average period of recognition	2 years 7 months 13 days
Individual Performance Based Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential number of shares that may be earned	20.00%
Performance target achievement term	10 years
Individual performance vesting tranches	5
Company Wide Performance Based Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance target achievement term	10 years
Time Based Option Award
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, vesting period	4 years
Restricted Share Units \| Service-based RSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock based compensation expense	1.2
Weighted average period of recognition	2 years 9 months 26 days
Fair value of restricted shares vested during a period	0.4	0.2	0.8
Restricted Share Units \| Performance-based RSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock based compensation expense	21.8
Weighted average period of recognition	1 year 11 months 9 days
Restricted Shares and Restricted Share Units \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, vesting period	3 years
Restricted Shares and Restricted Share Units \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, vesting period	4 years
Restricted Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, vesting period	4 years
Unrecognized stock based compensation expense	41.1
Weighted average period of recognition	2 years 10 months 10 days
Fair value of restricted shares vested during a period	$ 22.8	$ 17.6	$ 10.5
Performance-based RSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation, vesting period	3 years
Expense related to grants recognizable period	3 years
Performance-based RSU \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential number of shares that may be earned	0.00%
Performance-based RSU \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Potential number of shares that may be earned	150.00%
Stock Option Plan 2008
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share authorized for issuance	23,980,823
Shares available for grant	0
Expiration period	10 years
Omnibus Incentive Plan, Twenty Twelve
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share authorized for issuance	15,246,000
Shares available for grant	10,739,867
Expiration period	7 years