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

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.14)

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 14

-Article 5

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

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-Section S99

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 360

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

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-Publisher FASB

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-Topic 210

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-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.13)

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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Property, Plant and Equipment - Components of Property, Plant and Equipment (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2014	Nov. 30, 2013	May 31, 2014
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	$ 1,446.4us-gaap_PropertyPlantAndEquipmentGross		$ 1,446.4us-gaap_PropertyPlantAndEquipmentGross		$ 1,421.9us-gaap_PropertyPlantAndEquipmentGross
Accumulated depreciation	(726.4)		(726.4)		(705.9)
Total property, plant and equipment, net	720.0us-gaap_PropertyPlantAndEquipmentNet		720.0us-gaap_PropertyPlantAndEquipmentNet		716.0us-gaap_PropertyPlantAndEquipmentNet
Depreciation expense	47.9us-gaap_Depreciation	97.6us-gaap_Depreciation	46.9us-gaap_Depreciation	91.8us-gaap_Depreciation
Land and land improvements [Member}
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	40.4		40.4		40.8
Buildings and leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	124.5		124.5		126.8
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	431.2		431.2		414.5
Instruments [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	814.2		814.2		791.9
Construction in progress [Member]
Property, Plant and Equipment [Line Items]
Total property, plant and equipment	$ 36.1		$ 36.1		$ 47.9