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Goodwill and intangible assets - Summary of identifiable intangible assets acquired (Details)
$ in Thousands
9 Months Ended
Mar. 31, 2017
USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]  
Fair value $ 1,497,280
Weighted-average life (in years) 12 years
Patents  
Acquired Finite-Lived Intangible Assets [Line Items]  
Fair value $ 113,760
Weighted-average life (in years) 18 years
Trademarks  
Acquired Finite-Lived Intangible Assets [Line Items]  
Fair value $ 251,600
Weighted-average life (in years) 12 years
Customer lists and other  
Acquired Finite-Lived Intangible Assets [Line Items]  
Fair value $ 1,131,920
Weighted-average life (in years) 11 years