Goodwill and intangible assets - Intangible assets by major category (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jun. 30, 2019
Finite-Lived Intangible Asset
Gross Carrying Amount	$ 5,620,915	$ 3,243,678
Accumulated Amortization	1,584,807	1,460,401
Patents and technology
Finite-Lived Intangible Asset
Gross Carrying Amount	992,729	265,644
Accumulated Amortization	138,740	130,233
Trademarks
Finite-Lived Intangible Asset
Gross Carrying Amount	753,804	542,573
Accumulated Amortization	269,734	252,388
Customer lists and other
Finite-Lived Intangible Asset
Gross Carrying Amount	3,874,382	2,435,461
Accumulated Amortization	$ 1,176,333	$ 1,077,780