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Derivative Instruments and Hedging Activities - Additional Information (Details) - USD ($) $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Nov. 30, 2019 | Dec. 31, 2019 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2008
Derivative [Line Items] |  |  |  |  |  |  |
Amortization of net (loss) gain on treasury lock |  |  | $ (18.2) | $ (5.3) |  |  |
3.90% Senior Notes, due June 2022 |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Stated interest rate |  | 3.90% | 3.90% |  |  |  |
2008 Interest Rate Protection Agreement |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Payments for (Proceeds from) settlement of interest rate protection agreement |  |  |  |  |  |  | $ 4.4
2010 Interest Rate Protection Agreement |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Payments for (Proceeds from) settlement of interest rate protection agreement |  |  |  |  |  | $ (9.9) |
2011 Interest Rate Protection Agreement |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Payments for (Proceeds from) settlement of interest rate protection agreement |  |  |  |  | $ 65.5 |  |
Treasury Lock |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |
Amortization of net (loss) gain on treasury lock | $ (13.1) | $ (13.1) |  |  |  |  |
Amortization of treasury lock settlements, after tax |  | 6.5 |  |  |  |  |
Income tax benefit from stranded tax effects in accumulated OCI related to write-off of remaining treasury lock |  | $ 3.2 |  |  |  |  |

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- Definition Derivative gain loss on derivative net of tax. + References No definition available. + Details
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- Definition Contractual interest rate for funds borrowed, under the debt 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(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5618551-113959 + Details
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- Definition Amount, after adjustments, of tax expense (benefit) for gain (loss) from increase (decrease) in value of excluded component of derivative designated and qualifying as hedge. Adjustments include, but are not limited to, reclassifications for sale and settlement, and amounts recognized under systematic and rational method. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (dd) -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669646-108580 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (bb) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624171-113959 + Details
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- Definition The net cash outflow or inflow for a financial contract that meets the hedge criteria as either cash flow hedge, fair value hedge or hedge of net investment in foreign operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24072-122690 + Details
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