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Borrowings and Credit Arrangements - Additional Information (Detail)			3 Months Ended
	Dec. 17, 2018 USD ($)	Oct. 03, 2017 USD ($)	Dec. 29, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 30, 2017 USD ($)	Sep. 29, 2018 USD ($)	Feb. 15, 2018 USD ($)	Jan. 19, 2018 USD ($)	Oct. 10, 2017 USD ($)
Debt Instrument [Line Items]
Long-term debt			$ 3,127,300,000			$ 3,304,300,000
Debt extinguishment losses			800,000		$ 1,000,000
Payment of debt issuance costs			2,700,000		11,900,000
Senior notes								$ 1,000,000,000	$ 350,000,000
Borrowed principal			$ 1,000,000,000
Debt issuance costs							$ 1,500,000
Debt discount							1,500,000
Amended Term Loan
Debt Instrument [Line Items]
Proceeds from issuance of debt	$ 1,500,000,000	$ 1,800,000,000
Repayments of secured debt	1,460,000,000
Maximum borrowing capacity	1,500,000,000
Amended Term Loan | Percentage Added to Eurodollar Rate
Debt Instrument [Line Items]
Basis spread on variable rate			1.375%
Amended Revolver | Percentage Added to Eurodollar Rate
Debt Instrument [Line Items]
Basis spread on variable rate			1.375%
Amended Credit Agreement
Debt Instrument [Line Items]
Leverage ratio maximum			5.00
Decreased net leverage ratio pursuant to senior secured credit facility			4.50
Interest coverage ratio			3.75
Number of fiscal quarters ending on measurement date			4
Debt extinguishment losses			$ (800,000)		(1,000,000)
Maximum range of present value of cash flow percentage			10.00%
Direct third party costs interest expense			$ 800,000		$ 1,700,000
Payment of debt issuance costs			1,900,000
Credit Agreement
Debt Instrument [Line Items]
Repayments of secured debt		$ 1,320,000,000
Borrowed principal			$ 1,600,000,000
2025 Senior Notes
Debt Instrument [Line Items]
Stated interest rate			4.375%
2022 Senior Notes
Debt Instrument [Line Items]
Debt extinguishment losses				$ 44,900,000
Direct third party costs interest expense				$ 2,600,000
Senior notes							1,000,000,000
Stated interest rate			5.25%
Offering price of principal amount							1,040,000,000
Make whole provision							$ 37,700,000
Amended Term Loan | Amended Credit Agreement
Debt Instrument [Line Items]
Periodic principal payment period			3 months
Long-term debt			$ 1,200,000,000
Amended Term Loan | Amended Credit Agreement | Minimum
Debt Instrument [Line Items]
Periodic principal payment			9,375,000
Amended Term Loan | Amended Credit Agreement | Maximum
Debt Instrument [Line Items]
Periodic principal payment			$ 28,125,000
Secured Term Loan | Amended Term Loan
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 1,500,000,000
Senior Notes | 2025 Senior Notes
Debt Instrument [Line Items]
Stated interest rate			4.375%
Offering price of principal amount								$ 1	$ 1
Senior Notes | 2028 Senior Notes
Debt Instrument [Line Items]
Stated interest rate			4.625%					4.625%
Offering price of principal amount								$ 1
2025 Senior Notes
Debt Instrument [Line Items]
Borrowed principal								600,000,000
Senior notes, face amount			$ 950,000,000
2028 Senior Notes
Debt Instrument [Line Items]
Borrowed principal								$ 400,000,000
Senior notes, face amount			$ 400,000,000

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