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CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Current Assets    
Cash and cash equivalents $ 563 $ 770
Funds deposited by counterparties 33 37
Restricted cash 17 279
Accounts receivable - trade 1,019 900
Inventory 412 453
Derivative instruments 764 624
Cash collateral posted in support of energy risk management activities 287 171
Accounts receivable - affiliate 5 180
Prepayments and other current assets 302 163
Current assets - held-for-sale 1 116
Current assets - discontinued operations 197 744
Total current assets 3,600 4,437
Property, plant and equipment, net 3,048 5,974
Other Assets    
Equity investments in affiliates 412 182
Goodwill 573 539
Intangible assets, net 591 507
Nuclear decommissioning trust fund 663 692
Derivative instruments 317 159
Other non-current assets 289 310
Non-current assets - held-for-sale 77 43
Non-current assets - discontinued operations 1,012 10,506
Total other assets 3,980 12,944
Total Assets 10,628 23,355
Current Liabilities    
Current portion of long-term debt and capital leases 72 204
Accounts payable 862 684
Accounts payable - affiliate 1 57
Derivative instruments 673 537
Cash collateral received in support of energy risk management activities 33 37
Accrued expenses and other current liabilities 680 756
Accrued expenses and other current liabilities - affiliate 0 161
Current liabilities - held for sale 5 72
Current liabilities - discontinued operations 72 846
Total current liabilities 2,398 3,354
Other Liabilities    
Long-term debt and capital leases 6,449 9,180
Nuclear decommissioning reserve 282 269
Nuclear decommissioning trust liability 371 415
Postretirement and other benefit obligations 435 458
Derivative instruments 304 143
Deferred income taxes 65 21
Out-of-market contracts, net 121 129
Other non-current liabilities 718 534
Non-current liabilities - held-for-sale 65 8
Non-current liabilities - discontinued operations 635 6,798
Total non-current liabilities 9,445 17,955
Total Liabilities 11,843 21,309
Redeemable noncontrolling interest in subsidiaries 19 78
Commitments and Contingencies
Stockholders' Equity    
Common stock; $0.01 par value; 500,000,000 shares authorized; 420,288,886 and 418,323,134 shares issued; and 283,650,039 and 316,743,089 shares outstanding at December 31, 2018 and 2017 4 4
Additional paid-in capital 8,510 8,376
Accumulated deficit (6,022) (6,268)
Treasury stock, at cost; 136,638,847 and 101,580,045 shares at December 31, 2018 and 2017 (3,632) (2,386)
Accumulated other comprehensive loss (94) (72)
Noncontrolling interest 0 2,314
Total Stockholders' Equity (1,234) 1,968
Total Liabilities and Stockholders' Equity 10,628 23,355
Continuing Operations    
Other Assets    
Deferred income taxes $ 46 $ 6