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Indebtedness (Details 3) (USD $) In Millions, unless otherwise specified | 12 Months Ended |  |  | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2012 6.875% senior unsecured notes | Aug. 31, 2010 6.875% senior unsecured notes | Dec. 31, 2012 Trade receivables financing arrangement | Dec. 31, 2012 7.625% senior notes | Dec. 31, 2007 7.625% senior notes | Dec. 31, 2012 Other indebtedness | Dec. 31, 2011 Other indebtedness
Debt activity |  |  |  |  |  |  |
Aggregate principal amount |  | $ 600.0 |  |  | $ 500.0 |  |
Interest rate percentage | 6.875% | 6.875% |  | 7.625% | 7.625% |  |
Repayments under senior credit facilities | 562.5 |  |  |  |  |  |
Termination costs paid for swaps related to term loan that was repaid | 26.9 |  |  |  |  |  |
Accrued interest paid related to term loan which was repaid | 2.6 |  |  |  |  |  |
Percentage of the principal amount at which notes are redeemable at any time prior to maturity | 100.00% |  |  | 100.00% |  |  |
Percentage of the aggregate principal amount at which notes may redeemed with proceeds from certain equity offerings at any time prior to September 1, 2013 | 35.00% |  |  |  |  |  |
Percentage of the principal amount representing redemption price of notes which may be redeemed with proceeds from certain equity offerings | 106.875% |  |  |  |  |  |
Percentage of principal amount at which notes may be required to be repurchased in event of change of control | 101.00% |  |  | 101.00% |  |  |
Trade receivables from financing agreement, maximum borrowing capacity |  |  | 130.0 |  |  |  |
Other Borrowings and Financing Activities |  |  |  |  |  |  |
Outstanding amount, purchase card program agreement |  |  |  |  |  | 27.9 | 40.4
Amount of available borrowing capacity |  |  | $ 46.3 |  |  |  |

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