Financial instruments (Tables)

9 Months Ended

Mar. 31, 2018

Investments, All Other Investments [Abstract]

Investments classified by contractual maturity date

The contractual maturities of available-for-sale investments at March 31, 2018 and June 30, 2017 are as follows:

	March 31, 2018				June 30, 2017
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Less than one year	$	1,121	$	1,122	$	690	$	693
One to three years	8,736		8,806		7,865		7,924
Above three years	466		467		2,108		2,113

Schedule of carrying values and estimated fair values of debt instruments

The carrying value of long-term debt and estimated fair value of long-term debt are as follows:

	March 31, 2018		June 30, 2017
Carrying value of long-term debt	$	5,437,267	$	5,383,343
Estimated fair value of long-term debt	5,619,917		5,645,529

Schedule of derivative instruments in statement of financial position, fair value

The following summarizes the location and fair value of significant derivative financial instruments reported in the Consolidated Balance Sheet as of March 31, 2018 and June 30, 2017:

	Balance Sheet Caption	March 31, 2018		June 30, 2017
Net investment hedges
Cross-currency swap contracts	Other assets	$	—	$	15,135
Cross-currency swap contracts	Other liabilities	10,403		—
Cash flow hedges
Costless collar contracts	Non-trade and notes receivable	1,850		430
Costless collar contracts	Other accrued liabilities	3,557		2,027

Schedule of derivative and non-derivative financial instruments, gain (loss) in statement of financial performance

Gain (losses) on derivative and non-derivative financial instruments that were recorded in accumulated other comprehensive (loss) in the Consolidated Balance Sheet are as follows:

	Three Months Ended						Nine Months Ended
	March 31,						March 31,
	2018			2017			2018			2017
Cross-currency swap contracts	$	(13,374	)	$	(1,278	)	$	(22,672	)	$	3,741
Foreign denominated debt	(15,423		)	(11,009		)	(43,150		)	(11,005		)

Schedule of financial assets and liabilities measured at fair value

A summary of financial assets and liabilities that were measured at fair value on a recurring basis at March 31, 2018 and June 30, 2017 are as follows:

			Quoted Prices		Significant Other		Significant
	Fair		In Active		Observable		Unobservable
	Value at		Markets		Inputs		Inputs
	March 31, 2018		(Level 1)		(Level 2)		(Level 3)
Assets:
Equity securities	$	3,682	$	3,682	$	—	$	—
Corporate bonds	6,026		6,026		—		—
Asset-backed and mortgage-backed securities	4,369		—		4,369		—
Derivatives	2,098		—		2,098		—
Investments measured at net asset value	7,614
Liabilities:
Derivatives	15,495		—		15,495		—

			Quoted Prices		Significant Other		Significant
	Fair		In Active		Observable		Unobservable
	Value at		Markets		Inputs		Inputs
	June 30, 2017		(Level 1)		(Level 2)		(Level 3)
Assets:
Equity securities	$	3,008	$	3,008	$	—	$	—
Corporate bonds	5,968		5,968		—		—
Asset-backed and mortgage-backed securities	4,762		—		4,762		—
Derivatives	16,496		—		16,496		—
Investments measured at net asset value	7,073
Liabilities:
Derivatives	16,064		—		16,064		—