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Debt (Tables) | 6 Months Ended
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Jun. 30, 2018
Debt Disclosure [Abstract] |
Schedule of Extinguishment of Debt | The following table sets forth the total principal amounts repurchased as a result of the tender offers, redemption and repurchase (in millions):
| Aggregate Principal Amount Repurchased |  | Aggregate Repurchase Price(1)
8.50% senior notes due 2019 | $ | 237.6 |  |  | $ | 256.8 |
6.875% senior notes due 2020 | 328.0 |  |  | 354.7 |
4.70% Senior notes due 2021 | 156.2 |  |  | 159.7 |
Total | $ | 721.8 |  |  | $ | 771.2 |
(1) | Excludes accrued interest paid to holders of the repurchased senior notes.

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- Definition Tabular disclosure of debt extinguished which may include, amount of gain (loss), the income tax effect and the per share amount of the aggregate gain (loss), net of the related income tax. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=7516071&loc=d3e13374-112631 + Details
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