Borrowings - Additional Information (Detail) - USD ($)			1 Months Ended			3 Months Ended	12 Months Ended
	Aug. 14, 2014	Sep. 22, 2011	Jun. 30, 2016	Aug. 31, 2013	May 31, 2007	Sep. 30, 2014	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2009
Line of Credit Facility [Line Items]
Outstanding amount of line of credit			$ 0				$ 0	$ 0
Unused available capacity			750,000,000				750,000,000
Percentage of notes issued					99.10%
Par Value			1,025,000,000				1,025,000,000
Effective yield (percent)					6.251%
6.125% Senior Notes [Member]
Line of Credit Facility [Line Items]
Senior notes offered					$ 250,000,000
Senior Notes [Member]
Line of Credit Facility [Line Items]
Debt issuance costs							3,600,000	0	$ 4,300,000
2007 Senior Notes [Member]
Line of Credit Facility [Line Items]
Interest rate					6.125%
Debt issuance costs					$ 1,900,000
Debt issuance cost, amortization period					10 years
Amortization related to the senior notes			100,000				100,000	300,000
Purchased, principal amount of Senior Notes										$ 125,000,000.0
Unamortized bond discount										$ 1,000,000
Notes Payable, Fair Value Disclosure			129,100,000				129,100,000	135,800,000
2014 Senior Notes [Member] | Senior Notes [Member]
Line of Credit Facility [Line Items]
Debt issuance costs				$ 4,300,000
Interest rate				3.95%
Debt issuance cost, amortization period				7 years
Amortization related to the senior notes			2,500,000				2,500,000	3,100,000
Notes Payable, Fair Value Disclosure			427,600,000				427,600,000	417,800,000
Par Value				$ 400,000,000.0
Issuance price (percent)				99.871%
Effective yield (percent)				3.971%
2016 Senior Notes [Member] | Senior Notes [Member]
Line of Credit Facility [Line Items]
Debt issuance costs			$ 4,500,000				$ 4,500,000
Interest rate			3.40%				3.40%
Notes Payable, Fair Value Disclosure			$ 507,900,000				$ 507,900,000
Par Value			$ 500,000,000				$ 500,000,000
Issuance price (percent)			99.589%
Effective yield (percent)			3.449%				3.449%
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Debt issuance cost capitalized			$ 1,500,000				$ 1,500,000
Debt issuance costs							0	$ 1,900,000	0
Revolving Credit Facility [Member] | Fiscal 2015 Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility maximum borrowing capacity	$ 750,000,000.0
Term	5 years
Annual facility fee (as basis points)	0.125%
Outstanding amount of line of credit			0				0
Unused available capacity			$ 750,000,000				$ 750,000,000
Weighted-average interest rate			1.30%				1.30%	1.18%
Borrowing tranches, period							360 days
Unused borrowing capacity fee							$ 1,000,000	$ 800,000
Costs to establish credit facility	$ 1,900,000
Revolving Credit Facility [Member] | Fiscal 2015 Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Variable interest rate	1.125%
Revolving Credit Facility [Member] | U.S. Dollar Tranche [Member]
Line of Credit Facility [Line Items]
Credit facility maximum borrowing capacity	$ 670,000,000.0
Revolving Credit Facility [Member] | Multicurrency Tranche [Member]
Line of Credit Facility [Line Items]
Credit facility maximum borrowing capacity	$ 80,000,000.0
Revolving Credit Facility [Member] | Fiscal 2012 Credit Facilities [Member]
Line of Credit Facility [Line Items]
Debt issuance cost expensed						$ 100,000
Debt issuance cost capitalized			$ 300,000				$ 300,000
Fiscal 2012 Credit Facilities [Member]
Line of Credit Facility [Line Items]
Credit facility maximum borrowing capacity		$ 990,000,000.0
Five-year term loan facility [Member]
Line of Credit Facility [Line Items]
Credit facility maximum borrowing capacity		$ 490,000,000.0
Term		5 years
Interest at LIBOR plus basis points		1.25%
Repayment of revolving credit facility				$ 400,000,000
Five-year revolving credit facility [Member]
Line of Credit Facility [Line Items]
Credit facility maximum borrowing capacity		$ 500,000,000.0
Term		5 years
Interest at LIBOR plus basis points		1.25%
Annual facility fee (as basis points)		0.15%
Annual facility fee, Total								$ 100,000	$ 800,000
Fiscal 2012 Term Loan [Member]
Line of Credit Facility [Line Items]
Weighted-average interest rate									1.44%