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Property and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Property, Plant and Equipment [Line Items]
Plant, property and equipment, depreciable, gross	$ 205.0	$ 88.2
Less accumulated depreciation and amortization	40.7	46.0
Property and equipment, depreciable, net	164.3	42.2
Property and equipment, net	165.5	43.4
Depreciation expense	24.4	8.9	$ 4.8
Distribution Equipment
Property, Plant and Equipment [Line Items]
Plant, property and equipment, depreciable, gross	25.8	0.0
Building
Property, Plant and Equipment [Line Items]
Plant, property and equipment, depreciable, gross	50.4	0.0
Less accumulated depreciation and amortization	0.6
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Plant, property and equipment, depreciable, gross	22.5	20.5
Property and Equipment
Property, Plant and Equipment [Line Items]
Plant, property and equipment, depreciable, gross	17.9	15.4
Computer Equipment and Software
Property, Plant and Equipment [Line Items]
Plant, property and equipment, depreciable, gross	88.4	52.3
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1.2	$ 1.2
Distribution Equipment Held Under Capital Lease
Property, Plant and Equipment [Line Items]
Plant, property and equipment, depreciable, gross	17.9
Less accumulated depreciation and amortization	$ 1.7

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Plant, Property and Equipment, Depreciable, Gross

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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