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Acquisitions Acquisition - Salix (Details) - USD ($) $ in Millions			3 Months Ended	6 Months Ended	9 Months Ended
	Jan. 16, 2015	Dec. 31, 2014	Dec. 31, 2014	Mar. 31, 2015	Jun. 30, 2015	May. 21, 2015
Business Acquisition [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent					35.00%
Salix Animal Health LLC [Member]
Business Acquisition [Line Items]
Acquired Technology Assets	$ 2.1
European IAMS and Eukanuba [Member]
Business Acquisition [Line Items]
Acquired Technology Assets		$ 3.6	$ 3.6
Trade Names [Member] | Salix Animal Health LLC [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	20.0
Acquired Finite-lived Intangible Asset, Residual Value	1.0
Trade Names [Member] | European IAMS and Eukanuba [Member]
Business Acquisition [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles		26.7	26.7
Customer Relationships [Member]
Business Acquisition [Line Items]
Retention Rate						95.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent					38.00%
Business Acquisition Contingent Consideration Key Assumptions Discount Rate					9.50%
Customer Relationships [Member] | Salix Animal Health LLC [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Asset, Residual Value	$ 34.0
Finite-Lived Intangible Asset, Useful Life	13 years
Retention Rate	92.50%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	38.00%
Customer Relationships [Member] | European IAMS and Eukanuba [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Asset, Residual Value		$ 10.2	$ 10.2
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			25.00%
Trade Names [Member] | Salix Animal Health LLC [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life	13 years
Non-Compete Agreement [Member] | Salix Animal Health LLC [Member]
Business Acquisition [Line Items]
Acquired Finite-lived Intangible Asset, Residual Value	$ 1.4
Finite-Lived Intangible Asset, Useful Life	3 years
Minimum [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life					2 years
Minimum [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life					2 years
Minimum [Member] | Customer Relationships [Member] | Salix Animal Health LLC [Member]
Business Acquisition [Line Items]
Fair Value Inputs, Long-term Revenue Growth Rate	0.00%
Business Acquisition Contingent Consideration Key Assumptions Discount Rate	12.00%
Minimum [Member] | Customer Relationships [Member] | European IAMS and Eukanuba [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life			2 years
Fair Value Inputs, Long-term Revenue Growth Rate		0.50%
Retention Rate		90.00%	90.00%
Business Acquisition Contingent Consideration Key Assumptions Discount Rate				15.00%
Minimum [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life					3 years
Maximum [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life					20 years
Maximum [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life					20 years
Maximum [Member] | Customer Relationships [Member] | Salix Animal Health LLC [Member]
Business Acquisition [Line Items]
Fair Value Inputs, Long-term Revenue Growth Rate	12.10%
Business Acquisition Contingent Consideration Key Assumptions Discount Rate	13.00%
Maximum [Member] | Customer Relationships [Member] | European IAMS and Eukanuba [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life			15 years
Fair Value Inputs, Long-term Revenue Growth Rate		13.20%
Retention Rate		100.00%	100.00%
Business Acquisition Contingent Consideration Key Assumptions Discount Rate				16.00%
Maximum [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Finite-Lived Intangible Asset, Useful Life					13 years

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