Schedule 1 - Reconciliation of Consolidated Income (Loss) from Continuing Operations to Net Operating Earnings (Non-GAAP) (unaudited) Three Months Ended Twelve Months Ended December 31, December 31, (in millions, except per share amounts) 2017 2016 2017 2016 GAAP Income (Loss) from Continuing Operations $ (52.4) $ 88.8 $ 128.6 $ 328.1 Adjustments to Operating Income: Operating Revenues: Weather - compared to normal (6.9) 7.2 30.2 12.4 Operating Expenses: Plant retirement costs(1) - 22.1 1.5 22.1 IT service provider transition costs(2) 8.3 - 21.6 - Transaction costs(3) - 0.3 - 2.5 Loss (gain) on sale of assets and impairments, net 0.1 (0.6) - (1.0) Total adjustments to operating income 1.5 29.0 53.3 36.0 Other Income (Deductions): Loss on early extinguishment of long-term debt - - 111.5 - Income Taxes: Tax effect of above items 0.1 (10.2) (57.0) (12.9) Income taxes - discrete items(4) 161.1 - 161.1 - Total adjustments to income from continuing operations 162.7 18.8 268.9 23.1 Net Operating Earnings (Non-GAAP) $ 110.3 $ 107.6 $ 397.5 $ 351.2 Basic Average Common Shares Outstanding 337.5 322.9 329.4 321.8 GAAP Basic Earnings (Loss) Per Share From Continuing Operations $ (0.16) $ 0.28 $ 0.39 $ 1.02 Adjustment to Basic Earnings per Share from Continuing Operations 0.49 0.05 0.82 0.07 Non-GAAP Basic Net Operating Earnings Per Share $ 0.33 $ 0.33 $ 1.21 $ 1.09 (1) Represents employee severance costs incurred associated with the planned retirement of Units 7 and 8 at Bailly Generating Station. Includes costs for contract termination, employee severance and write downs of materials and supplies inventory balances. (2) Represents contract termination costs and external legal and consulting costs associated with termination of the IBM IT services agreement and the transition to a new multi-vendor strategy for IT service delivery. (3) Represents costs incurred associated with the separation of Columbia Pipeline Group, Inc. (4) Represents the impact of adopting the provisions of the Tax Cuts and Jobs Act of 2017. 22