Long-term Debt (Detail Textual) - USD ($)	3 Months Ended
Sep. 30, 2019	Jun. 30, 2019
Debt Instrument [Line Items]
Outstanding amount under Credit Facility	$ 1,609,744,000	$ 1,676,475,000
Interest Rate Swap \| Cash Flow Hedging
Debt Instrument [Line Items]
Aggregate notional amount	900,000,000.0
Bank Credit Facility
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity	$ 2,438,400,000
Outstanding borrowings interest rate	3.09%
Revolving Credit Facility
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity	$ 1,500,000,000.0
Outstanding amount under Credit Facility	730,000,000	785,000,000
Term loans
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity	938,400,000
Outstanding amount under Credit Facility	$ 879,744,000	$ 891,475,000
Term loan period	5 years
Loan maturity date	Jun. 30, 2024
Term loan frequency of payment	quarterly
Term loan principal payment	$ 11,700,000
Same-Day Swing Line Loan Revolving Credit Sub-Facility
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity	100,000,000.0
Outstanding amount under Credit Facility	0
Stand-By Letters Of Credit Revolving Credit Sub-Facility
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity	$ 25,000,000.0

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
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-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109500613&loc=SL6036836-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
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- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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Description of the frequency of periodic payments, which may be presented in a variety of ways (for example, monthly, quarterly, annually).

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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- Definition

Amount of the required periodic payment applied to principal.

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