Successor Predecessor ($ in millions) Year Ended 2012 Year Ended 2011 Period from June 16, 2010 to September 30, 2010 Period from September 28, 2009 to June 15, 2010 Net sales (1) Metal packaging $ 726.3 $ 693.6 $ 210.3 $ 445.8 Plastic packaging 453.5 467.9 114.7 260.1 Consolidated net sales $ 1,179.8 $ 1,161.5 $ 325.0 $ 705.9 Segment earnings (2) Metal packaging $ 148.5 $ 130.7 $ 36.7 $ 79.0 Plastic packaging 25.1 20.0 9.9 25.0 Segment earnings $ 173.6 $ 150.7 $ 46.6 $ 104.0 Reconciliation of segment earnings to income (loss) before income taxes Segment earnings $ 173.6 $ 150.7 $ 46.6 $ 104.0 Depreciation and amortization expense (88.4 ) (91.9 ) (22.0 ) (37.1 ) Corporate undistributed expenses (3) (13.5 ) (10.3 ) (4.1 ) (13.8 ) Other undistributed expenses (4) (38.0 ) (183.5 ) (32.4 ) (105.9 ) Income (loss) before income taxes $ 33.7 $ (135.0 ) $ (11.9 ) $ (52.8 ) Depreciation and amortization Metal packaging $ 48.8 $ 50.5 $ 13.8 $ 16.8 Plastic packaging 35.5 38.0 7.1 19.1 Segment depreciation and amortization 84.3 88.5 20.9 35.9 Corporate 4.1 3.4 1.1 1.2 Consolidated depreciation and amortization $ 88.4 $ 91.9 $ 22.0 $ 37.1 (1) In the periods presented, there were no significant intersegment sales. (2) Management uses a measure of segment earnings to evaluate segment performance. We calculate segment earnings as net sales less costs of products sold and selling expenses, each as related to the applicable segment. Segment earnings exclude depreciation and amortization and goodwill impairment loss. (3) Corporate undistributed expenses include stock-based compensation expense and certain other general administrative expenses not allocated to the segments for reporting purposes. Corporate undistributed expenses exclude depreciation and amortization. (4) Other undistributed expenses not allocated to segments include the following: restructuring expense, interest expense, merger transaction costs, business acquisitions costs, gain on sale of equipment, loss on extinguishment of debt, other and goodwill impairment los