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Pension and Other Postretirement Benefits (Details 10) - USD ($)
12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2013
Pension and Other Postretirement Benefit Disclosures      
Pension contributions $ 7,200,000 $ 6,300,000 $ 144,900,000
Defined contribution retirement and savings plans      
Other Benefit Plans      
Contributions to defined contribution retirement and savings plans 12,000,000 10,600,000 8,900,000
Pension Plans      
Pension and Other Postretirement Benefit Disclosures      
Expected contributions for next fiscal year 0    
Estimated future benefit payments      
2016 73,600,000    
2017 74,500,000    
2018 76,000,000    
2019 78,300,000    
2020 80,500,000    
2021-2024 425,800,000    
U.S. Pension Plans      
Pension and Other Postretirement Benefit Disclosures      
Pension contributions 7,200,000 6,300,000 144,900,000
Other non-qualified pension plans      
Pension and Other Postretirement Benefit Disclosures      
Pension contributions 3,300,000 $ 3,200,000 $ 3,300,000
Other Postretirement Plans      
Estimated future benefit payments      
2016 14,000,000    
2017 14,400,000    
2018 14,600,000    
2019 14,800,000    
2020 15,000,000    
2021-2024 $ 76,700,000