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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Cash Flows From Operating Activities:    
Net Income (Loss) Available to Common Stockholders, Basic $ 169 $ 171
Adjustments to reconcile net income to net cash provided from operating activities:    
Asset Impairment Charges 4  
Deferred Income Tax Expense (Benefit) 52 27
Depreciation and amortization 106 100
Amortization of nuclear fuel 13 14
Allowance for equity funds used during construction (4) (9)
Carrying cost recovery (1) (5)
Cash provided (used) by changes in certain assets and liabilities:    
Increase (Decrease) in Receivables 75 67
Increase (Decrease) Income Taxes Receivable 0 136
Increase (Decrease) in Inventories 2 6
increase (Decrease) in Prepaid Expense 17 (5)
Increase (Decrease) in Other Regulatory Assets (9) (4)
Increase (Decrease) in Regulatory liabilities (115) (3)
Increase (Decrease ) in Accounts payable (40) (48)
Unrecognized tax benefits, increase (decrease) 0 55
Increase (Decrease) in Taxes accrued (150) (142)
Increase (Decrease) in Derivative Assets and Liabilities (1) (3)
Changes in other assets (113) (2)
Changes in other liabilities 87 (46)
Net Cash Provided From Operating Activities 92 309
Cash Flows From Investing Activities:    
Property additions and construction expenditures (227) (342)
Proceeds from investments (including derivative collateral posted) 32 19
Purchase of investments (including derivative collateral posted) (125) (20)
Payments for (Proceeds from) Hedge, Financing Activities 115  
Net Cash Used For Investing Activities (205) (343)
Proceeds from Issuance of Long-term Debt 100 0
Cash Flows From Financing Activities:    
Repayments of Long-term Debt (8) (8)
Dividends (87) (82)
Short-term borrowings, net (102) (72)
Net Cash (Used For) Provided From Financing Activities (97) (162)
Net Increase (Decrease) in Cash and Cash Equivalents (210) (196)
Cash and Cash Equivalents, January 1 409 208
Cash and Cash Equivalents, March 31 199 12
Supplemental Cash Flow Information:    
Cash paid for-Interest (net of capitalized interest ) 82 76
Proceeds from Income Tax Refunds 0  
Noncash Investing and Financing Activities:    
Accrued construction expenditures 36 57
Capital Lease Obligations Incurred 3 0
SCEG    
Cash Flows From Operating Activities:    
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest 128 112
Adjustments to reconcile net income to net cash provided from operating activities:    
Asset Impairment Charges 4  
Deferred Income Tax Expense (Benefit) 39 12
Depreciation and amortization 84 79
Amortization of nuclear fuel 13 14
Allowance for equity funds used during construction (3) (9)
Carrying cost recovery (1) (5)
Cash provided (used) by changes in certain assets and liabilities:    
Increase (Decrease) in Receivables 41 45
Increase (Decrease) Income Taxes Receivable 0 53
Increase (Decrease) in Due from Affiliates, Current (6) 2
Increase (Decrease) in Inventories (9) (7)
increase (Decrease) in Prepaid Expense 8 0
Increase (Decrease) in Other Regulatory Assets (6) (2)
Increase (Decrease) in Regulatory liabilities (112) 0
Increase (Decrease ) in Accounts payable (15) (11)
Unrecognized tax benefits, increase (decrease) 0 97
Increase (Decrease) in Due to Affiliate, Current (5) (21)
Increase (Decrease) in Taxes accrued (150) (93)
Changes in other assets (112) 1
Changes in other liabilities 95 (14)
Net Cash Provided From Operating Activities (7) 253
Cash Flows From Investing Activities:    
Property additions and construction expenditures (159) (282)
Proceeds from investments (including derivative collateral posted) 25 10
Purchase of investments (including derivative collateral posted) (10) (12)
Payments to Acquire Interest in Subsidiaries and Affiliates (111)  
Payments for (Proceeds from) Hedge, Financing Activities 115  
Investment In Affiliate (121)  
Net Cash Used For Investing Activities (261) (284)
Proceeds from Issuance of Long-term Debt   0
Cash Flows From Financing Activities:    
Repayments of Long-term Debt (8) (8)
Dividends (82) (79)
Short-term borrowings-affiliate,net 159 (1)
Short-term borrowings, net (106) (34)
Proceeds from Issuance of Debt 100  
Net Cash (Used For) Provided From Financing Activities 63 (122)
Net Increase (Decrease) in Cash and Cash Equivalents (205) (153)
Cash and Cash Equivalents, January 1 395 164
Cash and Cash Equivalents, March 31 190 11
Supplemental Cash Flow Information:    
Cash paid for-Interest (net of capitalized interest ) 63 61
Income Taxes Paid 0 3
Proceeds from Income Tax Refunds 0 143
Noncash Investing and Financing Activities:    
Accrued construction expenditures 21 46
Capital Lease Obligations Incurred $ 3 $ 0