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Treasury - Additional Information (Detail) - USD ($) |  |  |  | 6 Months Ended | 9 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 28, 2020 | Oct. 31, 2018 | Oct. 23, 2018 | Jun. 30, 2021 | Jun. 30, 2020 | Sep. 30, 2020 | Apr. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Sep. 21, 2020 | Jun. 03, 2016
Equity Class Of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, starting date |  |  |  | Oct. 23, 2018 |  |  |  |  |  |  |
Rate adjustment to weighted average federal funds rate for credit facility borrowings |  |  |  | 0.50% |  |  |  |  |  |  |
Rate adjustment to one month Eurodollar rate on credit facility borrowings |  |  |  | 1.00% |  |  |  |  |  |  |
Accounts receivable securitization program credit facility, borrowing capacity |  |  |  |  |  |  |  | $ 450,000,000 |  |  |
Accounts receivable securitization program credit facility, available borrowing capacity |  |  |  |  |  |  | $ 20,000,000 |  |  |  |
Accounts receivable securitization program credit facility, amount outstanding |  |  |  | $ 0 |  |  |  |  |  |  |
Debt instrument carrying amount |  |  |  | 3,600,000,000 |  |  |  |  | $ 3,900,000,000 |  |
Fair value of debt |  |  |  | 3,600,000,000 |  |  |  |  | 3,900,000,000 |  |
Cash flow hedges |  |  |  | 0 |  |  |  |  | $ 0 |  |
Foreign Currency Forward Exchange Contracts |  |  |  |  |  |  |  |  |  |  |
Equity Class Of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net cash (outflows) inflows |  |  |  | $ 21,000,000 | $ 57,000,000 |  |  |  |  |  |
Tranche B Term Loan | One Month LIBOR Rate Plus Index Based Loans |  |  |  |  |  |  |  |  |  |  |
Equity Class Of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated Leverage Ratio |  |  |  | 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% |  |  |  |  |  |  |
Revolving Credit Facility |  |  |  |  |  |  |  |  |  |  |
Equity Class Of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, borrowing capacity |  |  | $ 1,000,000,000 |  |  |  |  |  |  |  |
Line of credit facility, available borrowing capacity |  |  |  | $ 996,000,000 |  |  |  |  |  |  |
Line of credit facility amount outstanding |  |  | 1,000,000,000 | $ 0 |  |  |  |  |  |  |
Current applicable margins |  |  |  | 1.375% |  |  |  |  |  |  |
Revolving Credit Facility | ABR-based loans |  |  |  |  |  |  |  |  |  |  |
Equity Class Of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Current applicable margins |  |  |  | 1.75% |  |  |  |  |  |  |
Revolving Credit Facility | Letter of Credit |  |  |  |  |  |  |  |  |  |  |
Equity Class Of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, borrowing capacity |  |  |  | $ 125,000,000 |  |  |  |  |  |  |
Letters of credit, outstanding |  |  |  | 4,000,000 |  |  |  |  |  |  |
Tranche A Term Loan |  |  |  |  |  |  |  |  |  |  |
Equity Class Of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, borrowing capacity |  |  | $ 2,000,000,000 |  |  |  |  |  |  |  |
Senior notes, maturity date |  |  | Oct. 23, 2023 |  |  |  |  |  |  |  |
Line of credit facility amount outstanding |  |  |  | $ 1,850,000,000 |  |  |  |  |  |  |
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 |  |  |  | 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 |  |  |  | $ 488,000,000 |  |  |  |  |  |  |
Scheduled principal payments per quarter |  |  | $ 1,250,000 |  |  |  |  |  |  |  |
Debt instrument payment, description |  |  |  | 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 |  |  |  |  |  |  |
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% |  |  |  |  |  |  |  |  |  |
Term Loan A |  |  |  |  |  |  |  |  |  |  |
Equity Class Of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Current applicable margins |  |  |  | 1.375% |  |  |  |  |  |  |
Term Loan A | ABR-based loans |  |  |  |  |  |  |  |  |  |  |
Equity Class Of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Current applicable margins |  |  |  | 0.375% |  |  |  |  |  |  |
Minimum | Revolving Credit Facility | One Month LIBOR Rate Plus Index Based Loans |  |  |  |  |  |  |  |  |  |  |
Equity Class Of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated Leverage Ratio |  |  |  | 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% |  |  |  |  |  |  |
Minimum | Term Loan A | One Month LIBOR Rate Plus Index Based Loans |  |  |  |  |  |  |  |  |  |  |
Equity Class Of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated Leverage Ratio |  |  |  | 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% |  |  |  |  |  |  |
Maximum | Revolving Credit Facility | One Month LIBOR Rate Plus Index Based Loans |  |  |  |  |  |  |  |  |  |  |
Equity Class Of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated Leverage Ratio |  |  |  | 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% |  |  |  |  |  |  |
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% |  |  |  |  |  |  |
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% |  |  |  |  |  |  |

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- Definition Net fair value of all derivative instruments designated as cash flow hedging instruments, which is ordinarily reflected within other comprehensive income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=117331979&loc=d3e41228-113958 + Details
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- Definition Description of the payment terms of the debt instrument (for example, whether periodic payments include principal and frequency of payments) and discussion about any contingencies associated with the payment. + 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(a)(3)) -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 470 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823 + Details
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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 No definition available. + Details
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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. + 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 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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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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- Definition This is the principal amount outstanding for securitized loans only (across all types of loans). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719 + Details
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