Financial instruments (Tables)

6 Months Ended

Dec. 31, 2017

Investments, All Other Investments [Abstract]

Investments classified by contractual maturity date

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

	December 31, 2017				June 30, 2017
	Amortized Cost		Fair Value		Amortized Cost		Fair Value
Less than one year	$	1,085	$	1,087	$	690	$	693
One to three years	7,800		7,861		7,865		7,924
Above three years	1,798		1,805		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:

	December 31, 2017		June 30, 2017
Carrying value of long-term debt	$	5,418,171	$	5,383,343
Estimated fair value of long-term debt	5,712,883		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 December 31, 2017 and June 30, 2017:

	Balance Sheet Caption	December 31, 2017		June 30, 2017
Net investment hedges
Cross-currency swap contracts	Other assets	$	—	$	15,135
Cross-currency swap contracts	Other liabilities	516		—
Cash flow hedges
Costless collar contracts	Non-trade and notes receivable	1,142		430
Costless collar contracts	Other accrued liabilities	3,654		2,027

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

Gains (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					Six Months Ended
	December 31,					December 31,
	2017			2016		2017			2016
Cross-currency swap contracts	$	(2,725	)	$	8,907	$	(9,298	)	$	5,019
Foreign denominated debt	(10,893		)	4,934		(27,727		)	4,261

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 December 31, 2017 and June 30, 2017 are as follows:

			Quoted Prices		Significant Other		Significant
	Fair		In Active		Observable		Unobservable
	Value at		Markets		Inputs		Inputs
	December 31, 2017		(Level 1)		(Level 2)		(Level 3)
Assets:
Equity securities	$	4,574	$	4,574	$	—	$	—
Corporate bonds	6,239		6,239		—		—
Asset-backed and mortgage-backed securities	4,515		—		4,515		—
Derivatives	12,829		—		12,829		—
Investments measured at net asset value	7,422
Liabilities:
Derivatives	16,094		—		16,094		—

			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		—