XML 84 R58.htm IDEA: XBRL DOCUMENT v3.2.0.727
Fair Value Measurements, Level 3 Fair Value Input Reconciliation Table (Details) - Derivative - Midwest premium swap contracts
$ in Millions
6 Months Ended
Jun. 30, 2015
USD ($)
Reconciliation of activity for financial instruments classified as Level 3:  
Balance at December 31, 2014 $ 1.0
Total realized/unrealized (losses) included in:  
Cost of goods sold excluding depreciation and amortization and other items and Unrealized losses (gains) on derivative instruments (3.9)
Transactions involving Level 3 derivative contracts:  
Purchases (4.9)
Sales 0.0
Issuances 0.0
Settlements 3.5
Transactions involving Level 3 derivatives — net (1.4)
Transfers in and (or) out of Level 3 valuation hierarchy 0.0
Balance at June 30, 2015 (4.3)
Total (losses) included in Unrealized losses (gains) on derivative instruments, attributable to the change in unrealized gains/losses relating to derivative contracts held at June 30, 2015: $ (4.4)