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Long-Term Debt - Additional Information (Details) - USD ($)		3 Months Ended
	May 30, 2018	Sep. 30, 2018	Sep. 30, 2017	Jun. 30, 2018	Jan. 16, 2014
Debt Instrument [Line Items]
Long-term debt		$ 2,645,000,000		$ 2,647,500,000
Revolver | Line of Credit
Debt Instrument [Line Items]
Interest expense		0	$ 1,800,000
Credit agreement, maximum capacity		450,000,000
Long-term debt		$ 0
Proceeds from line of credit			200,000,000
Revolver | Line of Credit | LIBOR | Minimum
Debt Instrument [Line Items]
Interest addition to floating rate		1.25%
Revolver | Line of Credit | LIBOR | Maximum
Debt Instrument [Line Items]
Interest addition to floating rate		1.75%
Term Loan B
Debt Instrument [Line Items]
Debt instrument face amount	$ 1,000,000,000				$ 800,000,000
Proceeds from issuance of debt	$ 1,000,000,000
Term loan period, years		7 years
Term loan quarterly repayment as percentage of principal		0.25%
Effective interest rate percentage		3.83%
Interest expense		$ 9,800,000	$ 6,400,000
Long-term debt		$ 995,000,000		$ 997,500,000
Term Loan B | LIBOR
Debt Instrument [Line Items]
Interest addition to floating rate		1.75%

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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.

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Face (par) amount of debt instrument at time of issuance.

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

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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.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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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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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

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