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Debt - Additional Information (Details) - USD ($) $ in Millions |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Aug. 29, 2016 | Sep. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015
Debt Instrument [Line Items] |  |  |  |  |  |
Long-term debt |  | $ 2,664.6 |  | $ 2,664.6 |  | $ 2,309.2
Cash payments paid for interest |  |  |  | 59.5 | $ 58.6 |
Amortization of treasury lock settlements |  |  | $ 1.4 | 4.2 | 4.2 |
Amortization of deferred financing costs |  | 0.5 | $ 0.5 | $ 1.4 | 1.3 |
Five Year Credit Agreement |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, term | 5 years |  |  |  |  |
Unsecured Debt | Five-Year Term Loan, due August 2021 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, face amount | $ 385.0 |  |  |  |  |
Debt instrument, term | 5 years |  |  | 5 years |  |
Long-term debt |  | 385.0 |  | $ 385.0 |  | 0.0
Unsecured Debt | Seven-Year Term Loan, due October 2020 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, face amount | $ 650.0 |  |  |  |  |
Debt instrument, term | 7 years |  |  | 7 years |  |
Repayment of debt |  |  |  | $ 4.9 | 4.9 |
Long-term debt | $ 633.7 | 632.1 |  | $ 632.1 |  | 637.0
Unsecured Debt | Five-Year Term Loan, due October 2018 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, term |  |  |  | 5 years |  |
Repayment of debt |  |  |  | $ 25.0 | $ 25.0 |
Long-term debt |  | 0.0 |  | 0.0 |  | 25.0
Line of Credit | Revolving Credit Facility, due August 2021 |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Debt instrument, face amount | $ 350.0 |  |  |  |  |
Letters of credit outstanding |  | 25.0 |  | 25.0 |  |
Long-term debt |  | 0.0 |  | 0.0 |  | $ 0.0
Senior Notes | Fixed-Rate Senior Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Book value of fixed rate debt |  | 1,647.5 |  | 1,647.5 |  |
Long-term debt (fixed-rate debt), fair value |  | 1,767.1 |  | 1,767.1 |  |
Term Loan | Variable-Rate Term Loans |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Book value of variable rate debt |  | $ 1,017.1 |  | $ 1,017.1 |  |

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- Definition Amount of amortization expense attributable to debt issuance costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(8)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(8)) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + 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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- 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 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 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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