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Borrowings and Credit Arrangements - Subsequent Events (Details) - USD ($) $ in Thousands |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Oct. 10, 2017 | Oct. 03, 2017 | Sep. 30, 2017 | Sep. 24, 2016 | Sep. 26, 2015 | Oct. 31, 2017 | Jul. 01, 2017
Debt Instrument [Line Items] |  |  |  |  |  |  |
Proceeds used from credit agreement |  |  | $ 345,000 | $ 50,000 | $ 358,000 |  |
Notes principal amount |  |  |  |  |  |  | $ 100,000
Subsequent Event | Amended and Restated Credit Agreement |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Proceeds used from credit agreement |  | $ 1,800,000 |  |  |  |  |
Subsequent Event | Revolving Credit Facility | Amended Revolver |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Line of credit |  | 1,500,000 |  |  |  |  |
Borrowings under the Amended Revolver |  | $ 345,000 |  |  |  |  |
Subsequent Event | Revolving Credit Facility | Amended Revolver | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate |  | 1.50% |  |  |  |  |
Subsequent Event | Secured Term Loan | Amended Term Loan |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Line of credit |  |  |  |  |  | $ 1,500,000 |
Subsequent Event | Secured Term Loan | Amended Term Loan | Minimum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Scheduled principal payments per quarter |  | $ 9,375 |  |  |  |  |
Subsequent Event | Secured Term Loan | Amended Term Loan | Maximum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Scheduled principal payments per quarter |  | $ 37,500 |  |  |  |  |
Subsequent Event | Secured Term Loan | Amended Term Loan | London Interbank Offered Rate (LIBOR) |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Basis spread on variable rate |  | 1.50% |  |  |  |  |
Subsequent Event | Senior Notes | 2025 Notes |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Notes principal amount | $ 350,000 |  |  |  |  |  |
Interest rate | 4.375% |  |  |  |  |  |
Offering price, percentage of principal amount | 100.00% |  |  |  |  |  |
Maximum percentage of redemption of senior notes | 35.00% |  |  |  |  |  |
Percentage of redemption price, second period | 104.375% |  |  |  |  |  |
Percentage of redemption price, third period | 102.188% |  |  |  |  |  |
Percentage of redemption price, fourth period | 101.094% |  |  |  |  |  |
Percentage of redemption price, fifth period | 100.00% |  |  |  |  |  |
Percentage price of principal amount for repurchase of senior note | 101.00% |  |  |  |  |  |
Subsequent Event | Senior Notes | 2025 Indenture |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Interest rate | 4.375% |  |  |  |  |  |

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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://www.xbrl.org/2003/role/presentationRef -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=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -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=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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=6876686&loc=d3e534808-122878 + Details
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