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Debt and Credit Facilities - Additional Information (Detail) € in Millions, $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2015 USD ($) | Jun. 30, 2015 USD ($) | Sep. 30, 2014 USD ($) | Sep. 30, 2015 USD ($) | Sep. 30, 2014 USD ($) | Jun. 30, 2015 EUR (€) | Dec. 31, 2014 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |
Loss on debt redemption and refinancing activities | $ 0.6 |  | $ (17.7) | $ (110.7) | $ (18.5) |  |
5.50% Senior Notes due September 2025 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Credit facility, maturity date |  | Sep. 15, 2025 |  |  |  |  |
Senior Notes | $ 400.0 | $ 400.0 |  | $ 400.0 |  |  |
Debt interest rate | 5.50% | 5.50% |  | 5.50% |  | 5.50% | 5.50%
Senior notes fees |  | $ 8.0 |  |  |  |  |
4.50% Senior Notes due September 2023 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Credit facility, maturity date |  | Sep. 15, 2023 |  |  |  |  |
Senior Notes | $ 449.9 |  |  | $ 449.9 |  | € 400 |
Debt interest rate | 4.50% | 4.50% |  | 4.50% |  | 4.50% | 4.50%
Senior notes fees |  | $ 8.0 |  |  |  |  |
8.375% Senior Notes Due September 2021 [Member] |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Credit facility, maturity date |  | Sep. 01, 2021 |  |  |  |  |
Senior Notes |  |  |  |  |  |  | $ 750.0
Debt interest rate | 8.375% | 8.375% |  | 8.375% |  | 8.375% | 8.375%
Aggregate repurchase price of senior notes |  | $ 866.0 |  |  |  |  |
Repurchased debt principal amount |  | 750.0 |  |  |  |  |
Premium paid on redemption of debt |  | 99.0 |  |  |  |  |
Accrued interest paid on redemption of debt |  | 17.0 |  |  |  |  |
Loss on debt redemption and refinancing activities |  | 111.0 |  |  |  |  |
Amortization Of Debt Discount Premium |  | $ 11.0 |  |  |  |  |

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- Definition Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399 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=26872669&loc=d3e20235-122688 + Details
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