Derivatives and Hedging Activities (Details) lb in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2015 USD ($) lb	Jun. 30, 2014 USD ($)	Jun. 30, 2013 USD ($)
Fair value of derivatives
Derivatives designated as hedging instruments, Asset	$ 4.4	$ 20.4
Derivatives designated as hedging instruments, Liability	53.5	10.9
Forward interest rate swaps
Fair value of derivatives
Derivatives designated as hedging instruments, Asset	4.2	0.0
Derivatives designated as hedging instruments, Liability	0.0	0.0
Foreign exchange contracts
Fair value of derivatives
Derivatives designated as hedging instruments, Asset	0.2	0.0
Derivatives designated as hedging instruments, Liability	0.0	0.6
Commodity contracts
Fair value of derivatives
Derivatives designated as hedging instruments, Asset	0.0	20.4
Derivatives designated as hedging instruments, Liability	53.5	10.3
Other current assets
Fair value of derivatives
Derivatives designated as hedging instruments, Asset	1.7	11.3
Other current assets | Forward interest rate swaps
Fair value of derivatives
Derivatives designated as hedging instruments, Asset	1.5	0.0
Other current assets | Foreign exchange contracts
Fair value of derivatives
Derivatives designated as hedging instruments, Asset	0.2	0.0
Other current assets | Commodity contracts
Fair value of derivatives
Derivatives designated as hedging instruments, Asset	0.0	11.3
Other assets
Fair value of derivatives
Derivatives designated as hedging instruments, Asset	2.7	9.1
Other assets | Forward interest rate swaps
Fair value of derivatives
Derivatives designated as hedging instruments, Asset	2.7	0.0
Other assets | Foreign exchange contracts
Fair value of derivatives
Derivatives designated as hedging instruments, Asset	0.0	0.0
Other assets | Commodity contracts
Fair value of derivatives
Derivatives designated as hedging instruments, Asset	0.0	9.1
Accrued liabilities
Fair value of derivatives
Derivatives designated as hedging instruments, Liability	32.7	4.7
Accrued liabilities | Forward interest rate swaps
Fair value of derivatives
Derivatives designated as hedging instruments, Liability	0.0	0.0
Accrued liabilities | Foreign exchange contracts
Fair value of derivatives
Derivatives designated as hedging instruments, Liability	0.0	0.4
Accrued liabilities | Commodity contracts
Fair value of derivatives
Derivatives designated as hedging instruments, Liability	32.7	4.3
Other liabilities
Fair value of derivatives
Derivatives designated as hedging instruments, Liability	20.8	6.2
Other liabilities | Forward interest rate swaps
Fair value of derivatives
Derivatives designated as hedging instruments, Liability	0.0	0.0
Other liabilities | Foreign exchange contracts
Fair value of derivatives
Derivatives designated as hedging instruments, Liability	0.0	0.2
Other liabilities | Commodity contracts
Fair value of derivatives
Derivatives designated as hedging instruments, Liability	20.8	6.0
Fair Value Hedging | Forward interest rate swaps
Fair value of derivatives
Total notional amounts of interest rate contracts	150.0	0.0
Net gains recorded as a reduction to interest expense	2.9	0.0	$ 1.4
Cash flow hedges
Fair value of derivatives
Amount of (Loss) Gain Recognized in AOCI on Derivatives (Effective Portion)	(73.7)	57.7	(38.6)
Cash flow hedges | Forward interest rate swaps
Fair value of derivatives
Amount of (Loss) Gain Recognized in AOCI on Derivatives (Effective Portion)	0.0	0.0	2.7
Cash flow hedges | Forward interest rate swaps | Interest expense
Fair value of derivatives
Amount of (Loss) Gain Recognized in AOCI on Derivatives (Effective Portion)	0.3	0.3
Cash flow hedges | Foreign exchange contracts
Fair value of derivatives
Amount of (Loss) Gain Recognized in AOCI on Derivatives (Effective Portion)	$ 2.6	(1.6)	1.9
Cash flow hedges | Commodity contracts
Fair value of derivatives
Amounts of raw materials to be purchased from forward contracts | lb	27.7
Amount of (Loss) Gain Recognized in AOCI on Derivatives (Effective Portion)	$ (76.3)	$ 59.3	$ (43.2)