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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% |  |  |  |  |  |  |

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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 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959 + Details
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- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12355-112629 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 40 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=117329964&loc=d3e12317-112629 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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- Definition The increase (decrease) during the reporting period of all assets and liabilities used in operating activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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- Definition The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 + Details
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- Definition Amount of increase (decrease) of the credit facility. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(f)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References 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)(3) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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