SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	9 Months Ended
Jul. 03, 2020
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The condensed consolidated financial statements have been prepared by the Company pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC"). Certain information and note disclosures normally included in annual financial statements prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) have been condensed or omitted pursuant to such rules and regulations. The condensed consolidated balance sheet as of September 27, 2019, was derived from audited financial statements as of that date, but does not include all disclosures required by GAAP. These condensed consolidated financial statements and the accompanying notes are unaudited and should be read in conjunction with the consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended September 27, 2019 (the “2019 Annual Report”). The Company is subject to risks and uncertainties as a result of the COVID-19 pandemic and the extent and duration of the future impact on the Company's business is highly uncertain and difficult to predict. The COVID-19 pandemic has adversely impacted, and is likely to further adversely impact, nearly all aspects of the Company’s business and markets, including its workforce and operations and the operations of its customers, suppliers, distributors and business partners. The full extent to which the pandemic will directly or indirectly impact the Company's business, results of operations and financial condition, including but not limited to revenues, gross orders, expenses, manufacturing, research and development costs, reserves and allowances, fair value measurements, asset impairment charges, contingent consideration obligations and the effectiveness of the Company's hedging instruments, will depend on future developments that are highly uncertain and difficult to predict. The Company has approximately $1.4 billion in accessible liquidity, including approximately $769 million in cash and cash equivalents and approximately $600 million available under its $1.2 billion revolving credit facility. To date, the Company has not experienced a significant decline in customer credit quality or a significant increase in requests for changes or extension of payment terms as a result of COVID-19, although management will continue to closely monitor these metrics going forward. Furthermore, the Company's ability to estimate and make certain judgments may be materially impacted by the uncertainty caused by the pandemic. In the opinion of management, the condensed consolidated financial statements herein include adjustments necessary for a fair statement of the Company’s financial position as of July 3, 2020, and September 27, 2019, results of operations and statements of comprehensive earnings for the three and nine months ended July 3, 2020, and June 28, 2019, statements of cash flows for the nine months ended July 3, 2020, and June 28, 2019, and statements of equity for the nine months ended July 3, 2020, and June 28, 2019. The results of operations for the nine months ended July 3, 2020, are not necessarily indicative of the operating results to be expected for the full fiscal year or any future period.
Reclassifications	Reclassifications Certain reclassifications have been made to the amounts in the prior year in order to conform to the current year's presentation.
Fiscal Year	Fiscal Year The fiscal years of the Company as reported are the 52- or 53-week periods ending on the Friday nearest September 30. Fiscal year 2020 is the 53-week period ending October 2, 2020. Fiscal year 2019 was the 52-week period that ended on September 27, 2019. The fiscal quarters ended July 3, 2020 and June 28, 2019, were both 13-week periods.
Principles of Consolidation	Principles of Consolidation The condensed consolidated financial statements include those of VMS and its wholly-owned and majority-owned or controlled subsidiaries. Intercompany balances, transactions and stock holdings have been eliminated in consolidation. Consolidation of Variable Interest Entities For entities in which the Company has variable interests, the Company focuses on identifying which entity has the power to direct the activities that most significantly impact the variable interest entity’s economic performance and which enterprise has the obligation to absorb losses or the right to receive benefits from the variable interest entity. If the Company is the primary beneficiary of a variable interest entity, the assets, liabilities, and results of operations of the variable interest entity will be included in the Company’s condensed consolidated financial statements. At July 3, 2020 and September 27, 2019, the Company consolidated its non-controlling interest in a joint venture, included within its Oncology Systems business, related to the Cancer Treatment Services International ("CTSI") operations.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates. Due to the COVID-19 pandemic, the Company is subject to a greater degree of uncertainty than normal in making the judgments and estimates needed to apply its significant accounting policies, such as the impairment of goodwill and intangibles, and the impairment of equity investments, available-for-sale securities and loans receivables. As the COVID-19 pandemic and responsive actions continue to develop, management may make changes to these estimates and judgments, which could result in material impacts to the Company's financial statements in future periods.
Leases	Leases The Company determines if an arrangement is or contains a lease at the inception of an arrangement. The Company's operating lease right-of-use ("ROU") assets represents the right to use an underlying asset over the lease term and lease liabilities represent its obligation to make lease payments arising from the lease. ROU assets may also include initial direct costs incurred and prepaid lease payments, less lease incentives. Lease liabilities and their corresponding ROU assets are recognized based on the present value of lease payments over the lease term, discounted using the Company's incremental borrowing rate ("IBR"). The Company recognizes operating leases with lease terms of more than 12 months in operating lease right-of-use assets, accrued liabilities, and long-term lease liabilities on its Condensed Consolidated Balance Sheets. The Company’s finance leases primarily represent certain sale and leaseback-sublease arrangements. The Company has entered into sale-leaseback arrangements with a third-party finance company for certain equipment and simultaneously subleased the equipment to certain qualified customers. The Company’s leaseback arrangements have been accounted for as finance leases as they meet one or more of the finance lease classification criteria. The Company recognizes finance leases with lease terms of more than 12 months in property, plant, and equipment, net, accrued liabilities, and other long-term liabilities on its Condensed Consolidated Balance Sheets. For purposes of calculating lease liabilities and the corresponding ROU assets, the Company's lease term may include options to extend or terminate the lease when it is reasonably certain that it will exercise that option. The Company generally does not have adequate information to determine the implicit rate in a lease, therefore the Company uses an estimated IBR. The Company does not maintain a public credit rating and its debt arrangements are unsecured, thus requiring significant judgment to calculate the IBR. The Company uses different data sets to estimate the IBR, including: (i) an estimated indicative credit rating of the Company; (ii) yields on comparable credit rating composite curves; (iii) foreign exchange rates; and (iv) an estimated adjustment for collateral. The Company also applies adjustments to account for considerations related to (i) tenor and (ii) country credit rating that may not be fully incorporated by the aforementioned data sets. Certain of the Company’s lease arrangements include variable lease payments. Variable lease payments, not dependent on an index or discount rate, are expensed as incurred and are not included within the ROU asset and lease liability calculation. Variable lease payments generally include common area maintenance, utilities, maintenance charges, property taxes, insurance, and contingent rent payments. Certain of the Company's arrangements contain clauses that provide for contingent rent payments based on a percentage of revenue share and/or earnings before interest, taxes, depreciation and amortization. The Company combines lease and non-lease components as a single lease component for both its operating and finance leases. In addition, the Company does not record operating and finance lease assets and liabilities for short-term leases, which have an initial term of 12 months or less.
Recently Adopted Accounting Pronouncements and Recent Accounting Standards or Updates Not Yet Effective	Recently Adopted Accounting Pronouncements In the first quarter of fiscal year 2020, the Company adopted the Financial Accounting Standards Board ("FASB") standard on accounting for leases, "Leases." The new standard is intended to provide enhanced transparency and comparability by requiring lessees to record ROU assets and corresponding lease liabilities on the balance sheet. The Company adopted this standard under the optional transition method, which applies the standard on the effective date, rather than the earliest comparative period presented in the financial statements. The Company elected: (1) the "package of practical expedients," which does not require the Company to reassess its prior conclusions about lease identification, lease classification, and initial direct costs under the new standard; (2) not to separate non-lease components from lease components; and (3) not to recognize ROU assets and lease liabilities for short-term leases. The Company has implemented internal controls and key system functionalities to enable the preparation of financial information. The primary impact for the Company was the balance sheet recognition of ROU assets and lease liabilities for operating leases as a lessee. See Note 8, "Commitments and Contingencies," for more information on the impact of this adoption on the Company's condensed consolidated financial statements. In the first quarter of fiscal year 2020, the Company adopted FASB guidance that added the Overnight Index Swap rate based on the Secured Overnight Financing Rate ("SOFR") as a benchmark interest rate for hedge accounting purposes. The amendment recognizes SOFR as a likely LIBOR replacement and supports the marketplace transition by adding the new reference rate as a benchmark interest rate. The Company has not executed interest rate hedges but adopted the amendment prospectively as the Company may consider interest rate hedges in the future. The Company is monitoring the LIBOR to SOFR migration and will coordinate the transition of outstanding LIBOR based debt and any related interest rate derivatives with counterparties when the market is liquid to ensure an orderly and efficient transition. In the first quarter of fiscal year 2020, the Company adopted FASB guidance that allows companies to reclassify disproportionate tax effects in accumulated other comprehensive income caused by the Tax Cuts and Jobs Act to retained earnings. The impact of adopting this amendment on the Company's condensed consolidated financial statements was not material. Recent Accounting Standards or Updates Not Yet Effective In December 2019, the FASB issued guidance which simplifies the accounting for income taxes by removing certain exceptions to the current guidance and improving the consistent application of and simplification of other areas of the guidance. The standard is effective for the Company beginning in the first quarter of fiscal year 2022. Early adoption is permitted. The Company is evaluating the impact of adopting this guidance to its condensed consolidated financial statements. In August 2018, the FASB amended its guidance for costs of implementing a cloud computing service arrangement and aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. This new standard also requires customers to expense the capitalized implementation costs of a hosting arrangement that is a service contract over the term of the hosting arrangement. This new standard becomes effective for the Company in the first quarter of fiscal year 2021, with early adoption permitted. This new standard can be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. The Company is evaluating the impact of adopting this amendment to its condensed consolidated financial statements. In August 2018, the FASB issued guidance which modifies the disclosure requirements for employers that have sponsor defined benefit pension or other post-retirement plans by removing and adding certain disclosures for these plans. The standard is effective for the Company beginning in the first quarter of fiscal year 2022. Early adoption is permitted. The Company is evaluating the impact of adopting this guidance to its condensed consolidated financial statements. In August 2018, the FASB issued guidance which changed the disclosure requirements for fair value measurements by removing, adding and modifying certain disclosures. The standard is effective for the Company beginning in the first quarter of fiscal year 2021. The Company is evaluating the impact of adopting this guidance to its condensed consolidated financial statements. In June 2016, the FASB issued an amendment to its accounting guidance related to the impairment of financial instruments. The amendment adds a new impairment model that is based on expected losses, rather than incurred losses. The amendment will be effective for the Company beginning in its first quarter of fiscal year 2021. The Company is evaluating the impact of adopting this amendment to its condensed consolidated financial statements.

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)

9 Months Ended

Jul. 03, 2020

The condensed consolidated financial statements have been prepared by the Company pursuant to the rules and regulations of the Securities and Exchange Commission ("SEC"). Certain information and note disclosures normally included in annual financial statements prepared in accordance with accounting principles generally accepted in the United States (“GAAP”) have been condensed or omitted pursuant to such rules and regulations. The condensed consolidated balance sheet as of September 27, 2019, was derived from audited financial statements as of that date, but does not include all disclosures required by GAAP. These condensed consolidated financial statements and the accompanying notes are unaudited and should be read in conjunction with the consolidated financial statements and the notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended September 27, 2019 (the “2019 Annual Report”).

The Company is subject to risks and uncertainties as a result of the COVID-19 pandemic and the extent and duration of the future impact on the Company's business is highly uncertain and difficult to predict. The COVID-19 pandemic has adversely impacted, and is likely to further adversely impact, nearly all aspects of the Company’s business and markets, including its workforce and operations and the operations of its customers, suppliers, distributors and business partners. The full extent to which the pandemic will directly or indirectly impact the Company's business, results of operations and financial condition, including but not limited to revenues, gross orders, expenses, manufacturing, research and development costs, reserves and allowances, fair value measurements, asset impairment charges, contingent consideration obligations and the effectiveness of the Company's hedging instruments, will depend on future developments that are highly uncertain and difficult to predict.

The Company has approximately $1.4 billion in accessible liquidity, including approximately $769 million in cash and cash equivalents and approximately $600 million available under its $1.2 billion revolving credit facility. To date, the Company has not experienced a significant decline in customer credit quality or a significant increase in requests for changes or extension of payment terms as a result of COVID-19, although management will continue to closely monitor these metrics going forward. Furthermore, the Company's ability to estimate and make certain judgments may be materially impacted by the uncertainty caused by the pandemic. In the opinion of management, the condensed consolidated financial statements herein include adjustments necessary for a fair statement of the Company’s financial position as of July 3, 2020, and September 27, 2019, results of operations and statements of comprehensive earnings for the three and nine months ended July 3, 2020, and June 28, 2019, statements of cash flows for the nine months ended July 3, 2020, and June 28, 2019, and statements of equity for the nine months ended July 3, 2020, and June 28, 2019. The results of operations for the nine months ended July 3, 2020, are not necessarily indicative of the operating results to be expected for the full fiscal year or any future period.

Reclassifications

Certain reclassifications have been made to the amounts in the prior year in order to conform to the current year's presentation.

Fiscal Year

The fiscal years of the Company as reported are the 52- or 53-week periods ending on the Friday nearest September 30. Fiscal year 2020 is the 53-week period ending October 2, 2020. Fiscal year 2019 was the 52-week period that ended on September 27, 2019. The fiscal quarters ended July 3, 2020 and June 28, 2019, were both 13-week periods.

Principles of Consolidation

The condensed consolidated financial statements include those of VMS and its wholly-owned and majority-owned or controlled subsidiaries. Intercompany balances, transactions and stock holdings have been eliminated in consolidation.

Consolidation of Variable Interest Entities

For entities in which the Company has variable interests, the Company focuses on identifying which entity has the power to direct the activities that most significantly impact the variable interest entity’s economic performance and which enterprise has the obligation to absorb losses or the right to receive benefits from the variable interest entity. If the Company is the primary beneficiary of a variable interest entity, the assets, liabilities, and results of operations of the variable interest entity will be included in the Company’s condensed consolidated financial statements. At July 3, 2020 and September 27, 2019, the Company consolidated its non-controlling interest in a joint venture, included within its Oncology Systems business, related to the Cancer Treatment Services International ("CTSI") operations.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from these estimates.

Due to the COVID-19 pandemic, the Company is subject to a greater degree of uncertainty than normal in making the judgments and estimates needed to apply its significant accounting policies, such as the impairment of goodwill and intangibles, and the impairment of equity investments, available-for-sale securities and loans receivables. As the COVID-19 pandemic and responsive actions continue to develop, management may make changes to these estimates and judgments, which could result in material impacts to the Company's financial statements in future periods.

Leases

The Company determines if an arrangement is or contains a lease at the inception of an arrangement. The Company's operating lease right-of-use ("ROU") assets represents the right to use an underlying asset over the lease term and lease liabilities represent its obligation to make lease payments arising from the lease. ROU assets may also include initial direct costs incurred and prepaid lease payments, less lease incentives. Lease liabilities and their corresponding ROU assets are recognized based on the present value of lease payments over the lease term, discounted using the Company's incremental borrowing rate ("IBR"). The Company recognizes operating leases with lease terms of more than 12 months in operating lease right-of-use assets, accrued liabilities, and long-term lease liabilities on its Condensed Consolidated Balance Sheets.

The Company’s finance leases primarily represent certain sale and leaseback-sublease arrangements. The Company has entered into sale-leaseback arrangements with a third-party finance company for certain equipment and simultaneously subleased the equipment to certain qualified customers. The Company’s leaseback arrangements have been accounted for as finance leases as they meet one or more of the finance lease classification criteria. The Company recognizes finance leases with lease terms of more than 12 months in property, plant, and equipment, net, accrued liabilities, and other long-term liabilities on its Condensed Consolidated Balance Sheets.

For purposes of calculating lease liabilities and the corresponding ROU assets, the Company's lease term may include options to extend or terminate the lease when it is reasonably certain that it will exercise that option.

The Company generally does not have adequate information to determine the implicit rate in a lease, therefore the Company uses an estimated IBR. The Company does not maintain a public credit rating and its debt arrangements are unsecured, thus requiring significant judgment to calculate the IBR. The Company uses different data sets to estimate the IBR, including: (i) an estimated indicative credit rating of the Company; (ii) yields on comparable credit rating composite curves; (iii) foreign exchange rates; and (iv) an estimated adjustment for collateral. The Company also applies adjustments to account for considerations related to (i) tenor and (ii) country credit rating that may not be fully incorporated by the aforementioned data sets.

Certain of the Company’s lease arrangements include variable lease payments. Variable lease payments, not dependent on an index or discount rate, are expensed as incurred and are not included within the ROU asset and lease liability calculation. Variable lease payments generally include common area maintenance, utilities, maintenance charges, property taxes, insurance, and contingent rent payments. Certain of the Company's arrangements contain clauses that provide for contingent rent payments based on a percentage of revenue share and/or earnings before interest, taxes, depreciation and amortization.

The Company combines lease and non-lease components as a single lease component for both its operating and finance leases. In addition, the Company does not record operating and finance lease assets and liabilities for short-term leases, which have an initial term of 12 months or less.

Recently Adopted Accounting Pronouncements and Recent Accounting Standards or Updates Not Yet Effective

Recently Adopted Accounting Pronouncements

In the first quarter of fiscal year 2020, the Company adopted the Financial Accounting Standards Board ("FASB") standard on accounting for leases, "Leases." The new standard is intended to provide enhanced transparency and comparability by requiring lessees to record ROU assets and corresponding lease liabilities on the balance sheet. The Company adopted this standard under the optional transition method, which applies the standard on the effective date, rather than the earliest comparative period presented in the financial statements. The Company elected: (1) the "package of practical expedients," which does not require the Company to reassess its prior conclusions about lease identification, lease classification, and initial direct costs under the new standard; (2) not to separate non-lease components from lease components; and (3) not to recognize ROU assets and lease liabilities for short-term leases. The Company has implemented internal controls and key system functionalities to enable the preparation of financial information. The primary impact for the Company was the balance sheet recognition of ROU assets and lease liabilities for operating leases as a lessee. See Note 8, "Commitments and Contingencies," for more information on the impact of this adoption on the Company's condensed consolidated financial statements.

In the first quarter of fiscal year 2020, the Company adopted FASB guidance that added the Overnight Index Swap rate based on the Secured Overnight Financing Rate ("SOFR") as a benchmark interest rate for hedge accounting purposes. The amendment recognizes SOFR as a likely LIBOR replacement and supports the marketplace transition by adding the new reference rate as a benchmark interest rate. The Company has not executed interest rate hedges but adopted the amendment prospectively as the Company may consider interest rate hedges in the future. The Company is monitoring the LIBOR to SOFR migration and will coordinate the transition of outstanding LIBOR based debt and any related interest rate derivatives with counterparties when the market is liquid to ensure an orderly and efficient transition.

In the first quarter of fiscal year 2020, the Company adopted FASB guidance that allows companies to reclassify disproportionate tax effects in accumulated other comprehensive income caused by the Tax Cuts and Jobs Act to retained earnings. The impact of adopting this amendment on the Company's condensed consolidated financial statements was not material.

Recent Accounting Standards or Updates Not Yet Effective

In December 2019, the FASB issued guidance which simplifies the accounting for income taxes by removing certain exceptions to the current guidance and improving the consistent application of and simplification of other areas of the guidance. The standard is effective for the Company beginning in the first quarter of fiscal year 2022. Early adoption is permitted. The Company is evaluating the impact of adopting this guidance to its condensed consolidated financial statements.

In August 2018, the FASB amended its guidance for costs of implementing a cloud computing service arrangement and aligns the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. This new standard also requires customers to expense the capitalized implementation costs of a hosting arrangement that is a service contract over the term of the hosting arrangement. This new standard becomes effective for the Company in the first quarter of fiscal year 2021, with early adoption permitted. This new standard can be applied either retrospectively or prospectively to all implementation costs incurred after the date of adoption. The Company is evaluating the impact of adopting this amendment to its condensed consolidated financial statements.

In August 2018, the FASB issued guidance which modifies the disclosure requirements for employers that have sponsor defined benefit pension or other post-retirement plans by removing and adding certain disclosures for these plans. The standard is effective for the Company beginning in the first quarter of fiscal year 2022. Early adoption is permitted. The Company is evaluating the impact of adopting this guidance to its condensed consolidated financial statements.

In August 2018, the FASB issued guidance which changed the disclosure requirements for fair value measurements by removing, adding and modifying certain disclosures. The standard is effective for the Company beginning in the first quarter of fiscal year 2021. The Company is evaluating the impact of adopting this guidance to its condensed consolidated financial statements.

In June 2016, the FASB issued an amendment to its accounting guidance related to the impairment of financial instruments. The amendment adds a new impairment model that is based on expected losses, rather than incurred losses. The amendment will be effective for the Company beginning in its first quarter of fiscal year 2021. The Company is evaluating the impact of adopting this amendment to its condensed consolidated financial statements.