Equity (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016
Increase Decrease In Stockholders Equity [Roll Forward]
Beginning Balance			$ 3,299.6	$ 3,743.5
Comprehensive income	$ 172.5	$ 57.8	266.3	24.6
Dividends declared			(81.2)	(82.2)
Repurchases of common stock, including shares surrendered for tax withholdings			(14.6)	(114.9)
Stock-based compensation			39.4	31.9
Shares issued and tax benefits (shortfalls) recognized pursuant to stock-based compensation arrangements			0.1	(5.0)
Ending Balance	$ 3,509.6	$ 3,597.9	$ 3,509.6	$ 3,597.9

Amount of increase to additional paid-in capital (APIC) from recognition of equity-based compensation.

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Value of stock (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of stock value of such awards forfeited. Stock issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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