Derivatives and Hedging Activities - Schedule of fair value and location of outstanding derivative contracts recorded in consolidated balance sheets (Details) - Designated as Hedging Instrument - USD ($) $ in Millions	Sep. 30, 2019	Jun. 30, 2019
Asset Derivatives:
Total asset derivatives	$ 39.8	$ 12.5
Liability Derivatives:
Total liability derivatives	18.0	28.0
Other current assets
Asset Derivatives:
Total asset derivatives	21.2	4.7
Other assets
Asset Derivatives:
Total asset derivatives	18.6	7.8
Accrued liabilities
Liability Derivatives:
Total liability derivatives	10.7	16.7
Other liabilities
Liability Derivatives:
Total liability derivatives	7.3	11.3
Interest Rate Swaps
Asset Derivatives:
Total asset derivatives	2.0	1.9
Liability Derivatives:
Total liability derivatives	0.0	0.0
Interest Rate Swaps | Other current assets
Asset Derivatives:
Total asset derivatives	0.1	0.3
Interest Rate Swaps | Other assets
Asset Derivatives:
Total asset derivatives	1.9	1.6
Interest Rate Swaps | Accrued liabilities
Liability Derivatives:
Total liability derivatives	0.0	0.0
Interest Rate Swaps | Other liabilities
Liability Derivatives:
Total liability derivatives	0.0	0.0
Foreign currency forward contracts
Asset Derivatives:
Total asset derivatives	1.4	0.8
Liability Derivatives:
Total liability derivatives	0.0	0.0
Foreign currency forward contracts | Other current assets
Asset Derivatives:
Total asset derivatives	0.9	0.6
Foreign currency forward contracts | Other assets
Asset Derivatives:
Total asset derivatives	0.5	0.2
Foreign currency forward contracts | Accrued liabilities
Liability Derivatives:
Total liability derivatives	0.0	0.0
Foreign currency forward contracts | Other liabilities
Liability Derivatives:
Total liability derivatives	0.0	0.0
Commodity contracts
Asset Derivatives:
Total asset derivatives	36.4	9.8
Liability Derivatives:
Total liability derivatives	18.0	28.0
Commodity contracts | Other current assets
Asset Derivatives:
Total asset derivatives	20.2	3.8
Commodity contracts | Other assets
Asset Derivatives:
Total asset derivatives	16.2	6.0
Commodity contracts | Accrued liabilities
Liability Derivatives:
Total liability derivatives	10.7	16.7
Commodity contracts | Other liabilities
Liability Derivatives:
Total liability derivatives	$ 7.3	$ 11.3