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Debt (Tables)
3 Months Ended
Mar. 31, 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

 
354.5

4.70% senior notes due 2021
 
156.2

 
159.7

Total
 
$
721.8

 
$
771.0



(1) 
Excludes accrued interest paid to holders of the repurchased senior notes.