Treasury - Additional Information (Detail)					3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 28, 2020 USD ($)	Oct. 31, 2018 USD ($)	Oct. 23, 2018 USD ($)	Jun. 07, 2016 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2020 USD ($) Installment	Sep. 30, 2019 USD ($)	Dec. 31, 2015 USD ($) Derivative	Sep. 21, 2020 USD ($)	Dec. 31, 2019 USD ($)	Jun. 30, 2018 USD ($)	Apr. 30, 2018 USD ($)	Jun. 03, 2016 USD ($)
Equity Class Of Treasury Stock [Line Items]
Cash and cash equivalents					$ 1,101,230,000	$ 1,101,230,000				$ 61,268,000
Line of credit facility, starting date						Oct. 23, 2018
Rate adjustment to weighted average federal funds rate for credit facility borrowings					0.50%	0.50%
Rate adjustment to one month Eurodollar rate on credit facility borrowings						1.00%
Accounts receivable securitization program credit facility, borrowing capacity											$ 440,000,000	$ 450,000,000
Accounts receivable securitization program credit facility, amount outstanding					$ 0	$ 0
Accounts receivable securitization program credit facility, available borrowing capacity					450,000,000	450,000,000
Debt instrument carrying amount					3,600,000,000	3,600,000,000				4,000,000,000.0
Fair value of debt					$ 3,600,000,000	3,600,000,000				$ 4,000,000,000.0
One Point Three One Percent Forward Starting Interest Rate Swaps
Equity Class Of Treasury Stock [Line Items]
Number of additional forward starting interest rate swaps | Derivative								9
Maturity date of interest rate cash flow hedges								Apr. 15, 2019
Fixed rate payable on interest rate swap								1.31%
Foreign Currency Forward Exchange Contracts
Equity Class Of Treasury Stock [Line Items]
Net cash (outflows) inflows						$ 22,000,000	$ 34,000,000
Cash Flow Hedging | One Point Three One Percent Forward Starting Interest Rate Swaps
Equity Class Of Treasury Stock [Line Items]
Notional amount of interest rate cash flow hedges								$ 1,000,000,000.0
Tranche B Term Loan | One Month LIBOR Rate Plus Index Based Loans
Equity Class Of Treasury Stock [Line Items]
Consolidated Leverage Ratio					0.75%	0.75%
Tranche B Term Loan | One Two Three Six Month LIBOR Rate Plus Index Based Loans
Equity Class Of Treasury Stock [Line Items]
Consolidated Leverage Ratio					1.75%	1.75%
Revolving Credit Facility
Equity Class Of Treasury Stock [Line Items]
Line of credit facility, borrowing capacity			$ 1,000,000,000	$ 800,000,000
Line of credit facility increased amount			$ 200,000,000
Credit facility, maturity date			Oct. 23, 2023	Aug. 07, 2019
Line of credit facility, available borrowing capacity					$ 997,000,000	$ 997,000,000
Line of credit facility amount outstanding			$ 1,000,000,000		$ 0	$ 0
Current applicable margins					1.375%	1.375%
Revolving Credit Facility | ABR-based loans
Equity Class Of Treasury Stock [Line Items]
Current applicable margins					1.75%	1.75%
Revolving Credit Facility | Letter of Credit
Equity Class Of Treasury Stock [Line Items]
Line of credit facility, borrowing capacity					$ 125,000,000	$ 125,000,000
Letters of credit, outstanding					3,000,000	3,000,000
Tranche A Term Loan
Equity Class Of Treasury Stock [Line Items]
Line of credit facility, borrowing capacity			2,000,000,000	$ 1,710,000,000
Line of credit facility increased amount			$ 290,000,000
Senior notes, maturity date			Oct. 23, 2023	Aug. 07, 2019
Line of credit facility amount outstanding					1,913,000,000	$ 1,913,000,000
Number of installments | Installment						8
Tranche A Term Loan | Quarterly Payment for First Eight Installments
Equity Class Of Treasury Stock [Line Items]
Scheduled principal payments per quarter			$ 12,500,000
Debt instrument payment, description						commenced in March of 2019 and are scheduled to continue through December of 2020.
Tranche A Term Loan | Quarterly Payment after Eight Installments Until Maturity
Equity Class Of Treasury Stock [Line Items]
Scheduled principal payments per quarter			25,000,000
Debt instrument payment, description						commencing in March of 2021 until maturity in October of 2023
Tranche B Term Loan
Equity Class Of Treasury Stock [Line Items]
Line of credit facility, borrowing capacity		$ 500,000,000
Senior notes, maturity date						Oct. 31, 2025
Senior notes, maturity term		7 years
Line of credit facility amount outstanding					491,000,000	$ 491,000,000
Scheduled principal payments per quarter			$ 1,250,000
Debt instrument payment, description						commenced on March 31, 2019 and are scheduled to continue until maturity in October of 2025
New Senior Secured Notes
Equity Class Of Treasury Stock [Line Items]
Senior notes, issued					1,200,000,000	$ 1,200,000,000
New Senior Secured Notes | 3.75% Senior Secured Notes due 2019
Equity Class Of Treasury Stock [Line Items]
Senior Notes		$ 300,000,000
Senior notes, interest rate		3.75%
New Senior Secured Notes | 2.65% Senior Secured Notes due 2030
Equity Class Of Treasury Stock [Line Items]
Senior notes, maturity date						Oct. 15, 2030
Senior notes, interest rate									2.65%
Senior notes, issued									$ 800,000,000
New Senior Secured Notes | 5.00% Senior Secured Notes due 2026
Equity Class Of Treasury Stock [Line Items]
Senior notes, maturity date						Jun. 01, 2026
Senior notes, interest rate													5.00%
Senior notes, issued													$ 400,000,000
New Senior Secured Notes | 4.75% Senior Secured Notes due 2022
Equity Class Of Treasury Stock [Line Items]
Senior notes, interest rate	4.75%
Senior notes, issued	$ 700,000,000
Redemption price, percentage	100.00%
Loss on extinguishment of debt					$ (1,000,000)	$ (1,000,000)
Term Loan A
Equity Class Of Treasury Stock [Line Items]
Current applicable margins					1.375%	1.375%
Term Loan A | ABR-based loans
Equity Class Of Treasury Stock [Line Items]
Current applicable margins					0.375%	0.375%
Minimum
Equity Class Of Treasury Stock [Line Items]
Short -term cash investments interest rate						0.06%
Minimum | Revolving Credit Facility | One Month LIBOR Rate Plus Index Based Loans
Equity Class Of Treasury Stock [Line Items]
Consolidated Leverage Ratio					0.375%	0.375%
Minimum | Revolving Credit Facility | One Two Three Six Month LIBOR Rate Plus Index Based Loans
Equity Class Of Treasury Stock [Line Items]
Consolidated Leverage Ratio					1.375%	1.375%
Minimum | Term Loan A | One Month LIBOR Rate Plus Index Based Loans
Equity Class Of Treasury Stock [Line Items]
Consolidated Leverage Ratio					0.375%	0.375%
Minimum | Term Loan A | One Two Three Six Month LIBOR Rate Plus Index Based Loans
Equity Class Of Treasury Stock [Line Items]
Consolidated Leverage Ratio					1.375%	1.375%
Maximum
Equity Class Of Treasury Stock [Line Items]
Short -term cash investments interest rate						0.31%
Maximum | Revolving Credit Facility | One Month LIBOR Rate Plus Index Based Loans
Equity Class Of Treasury Stock [Line Items]
Consolidated Leverage Ratio					0.625%	0.625%
Maximum | Revolving Credit Facility | One Two Three Six Month LIBOR Rate Plus Index Based Loans
Equity Class Of Treasury Stock [Line Items]
Consolidated Leverage Ratio					1.625%	1.625%
Maximum | New Senior Secured Notes | 2.65% Senior Secured Notes due 2030
Equity Class Of Treasury Stock [Line Items]
Number of days to complete exchange offer						60 days
Maximum | Term Loan A | One Month LIBOR Rate Plus Index Based Loans
Equity Class Of Treasury Stock [Line Items]
Consolidated Leverage Ratio					0.625%	0.625%
Maximum | Term Loan A | One Two Three Six Month LIBOR Rate Plus Index Based Loans
Equity Class Of Treasury Stock [Line Items]
Consolidated Leverage Ratio					1.625%	1.625%