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FAIR VALUE MEASUREMENTS (Tables) | 12 Months Ended
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Dec. 31, 2013
Fair Value Disclosures [Abstract] |
Activity summary of financial instruments measured at fair value using level 3 inputs |
| December 31,
| 2013 |  | 2012
| ($ in millions)
Beginning balance | $ | 42.0 |  |  | $ | 49.0 |
Settlements | (23.2 | ) |  | (18.5 | )
Unrealized losses included in other (expense) income | 7.9 |  |  | 11.5 |
Ending balance | $ | 26.7 |  |  | $ | 42.0 |
Fair Value, by Balance Sheet Grouping [Table Text Block] | The following table summarizes the assets and liabilities measured at fair value in the consolidated balance sheets:
Balance at December 31, 2013 | Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Total
Assets | ($ in millions)
Interest rate swaps | $ | — |  |  | $ | 5.9 |  |  | $ | — |  |  | $ | 5.9 |
Commodity forward contracts | — |  |  | 1.3 |  |  | — |  |  | 1.3 |
Liabilities |  |  |  |  |  |  |  |  |  |  |
Interest rate swaps | — |  |  | 7.3 |  |  | — |  |  | 7.3 |
Earn out | — |  |  | — |  |  | 26.7 |  |  | 26.7 |
Balance at December 31, 2012 |
Assets |  |  |  |  |  |  |
Interest rate swaps | $ | — |  |  | $ | 8.3 |  |  | $ | — |  |  | $ | 8.3 |
Commodity forward contracts | 0.1 |  |  | 7.5 |  |  | — |  |  | 7.6 |
Liabilities |  |  |  |  |  |  |
Interest rate swaps | — |  |  | 10.2 |  |  | — |  |  | 10.2 |
Earn out | — |  |  | — |  |  | 42.0 |  |  | 42.0 |
For the
Fair Value Of Debt Table [Table Text Block] |
| Fair Value Measurements |  |
| Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Amount recorded on balance sheets
| ($ in millions)
Balance at December 31, 2013 | $ | — |  |  | $ | 561.4 |  |  | $ | 153.0 |  |  | $ | 714.4 |  |  | $ | 691.0 |
Balance at December 31, 2012 | — |  |  | 605.1 |  |  | 153.0 |  |  | 758.1 |  |  | 713.7 |

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- Definition Tabular disclosure of the fair value measurement of assets using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets) and gains or losses recognized in other comprehensive income (loss), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs), by class of asset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19279-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258 + Details
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