Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016
Accumulated Other Comprehensive Income (Loss), Net Of Tax [Roll Forward]
Beginning balance			$ (198.4)	$ (181.5)
OCI before reclassifications			63.1	(6.0)
Amounts reclassified from AOCI to earnings			(0.1)	7.2
Other comprehensive income (loss), net of tax	$ 28.7	$ 12.1	63.0	1.2
Ending balance	(135.4)	(180.3)	(135.4)	(180.3)
Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Tax			(20.1)	2.3
Gain (Loss) on Derivative Used in Net Investment Hedge, Net of Tax			(39.0)	4.4
Gain (Loss) on Derivative Used in Net Investment Hedge, Tax			(23.7)	2.7
Other Comprehensive Income (Loss), Cash Flow Hedges, Tax			(2.0)	(3.4)
Foreign Currency Translation Gains (Losses) [Member]
Accumulated Other Comprehensive Income (Loss), Net Of Tax [Roll Forward]
Beginning balance			(206.2)	(157.6)
OCI before reclassifications			87.7	2.1
Amounts reclassified from AOCI to earnings			0.0	0.0
Other comprehensive income (loss), net of tax			87.7	2.1
Ending balance	(118.5)	(155.5)	(118.5)	(155.5)
Net Unrealized Gains (Losses) on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss), Net Of Tax [Roll Forward]
Beginning balance			14.6	(12.0)
OCI before reclassifications			(23.9)	(8.1)
Amounts reclassified from AOCI to earnings			(0.4)	6.3
Other comprehensive income (loss), net of tax			(24.3)	(1.8)
Ending balance	(9.7)	(13.8)	(9.7)	(13.8)
Net Unrealized Gains (Losses) on Defined Benefit Plans [Member]
Accumulated Other Comprehensive Income (Loss), Net Of Tax [Roll Forward]
Beginning balance			(6.8)	(11.9)
OCI before reclassifications			(0.7)	0.0
Amounts reclassified from AOCI to earnings			0.3	0.9
Other comprehensive income (loss), net of tax			(0.4)	0.9
Ending balance	$ (7.2)	$ (11.0)	$ (7.2)	$ (11.0)

Gain (Loss) on Derivative Used in Net Investment Hedge, Tax

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- Definition

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

+ References

No definition available.

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- Definition

Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

+ References

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- Definition

Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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Amount of tax expense (benefit), after reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

+ References

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount of tax expense (benefit), before reclassification adjustments, related to increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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Amount after tax of reclassification adjustments of other comprehensive income (loss).

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Current period adjustment in other comprehensive income reflecting gains or losses on foreign currency transactions that are designated as, and are effective as, hedges of a net investment in a foreign entity, net of tax effect.

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