CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Current Assets
Cash and cash equivalents	$ 759	$ 345
Funds deposited by counterparties	51	32
Restricted cash	8	8
Accounts receivable, net	915	1,025
Inventory	372	383
Derivative instruments	884	860
Cash collateral paid in support of energy risk management activities	200	190
Prepayments and other current assets	290	245
Total current assets	3,479	3,088
Property, plant and equipment, net	2,573	2,593
Other Assets
Equity investments in affiliates	350	388
Operating lease right-of-use assets, net	446	464
Goodwill	579	579
Intangible assets, net	769	789
Nuclear decommissioning trust fund	702	794
Derivative instruments	434	310
Deferred income taxes	3,265	3,286
Other non-current assets	225	240
Total other assets	6,770	6,850
Total Assets	12,822	12,531
Current Liabilities
Current portion of long-term debt	640	88
Current portion of operating lease liabilities	71	73
Accounts payable	708	722
Derivative instruments	832	781
Cash collateral received in support of energy risk management activities	51	32
Accrued expenses and other current liabilities	550	663
Total current liabilities	2,852	2,359
Other Liabilities
Long-term debt	5,807	5,803
Non-current operating lease liabilities	473	483
Nuclear decommissioning reserve	303	298
Nuclear decommissioning trust liability	390	487
Derivative instruments	370	322
Deferred income taxes	15	17
Other non-current liabilities	1,076	1,084
Total other liabilities	8,434	8,494
Total Liabilities	11,286	10,853
Redeemable noncontrolling interest in subsidiaries	0	20
Commitments and Contingencies
Stockholders' Equity
Common stock; $0.01 par value; 500,000,000 shares authorized; 422,979,893 and 421,890,790 shares issued and 245,623,854 and 248,996,189 shares outstanding at March 31, 2020 and December 31, 2019, respectively	4	4
Additional paid-in-capital	8,498	8,501
Accumulated deficit	(1,570)	(1,616)
Treasury stock, at cost - 177,356,039 and 172,894,601 shares at March 31, 2020 and December 31, 2019, respectively	(5,189)	(5,039)
Accumulated other comprehensive loss	(207)	(192)
Total Stockholders' Equity	1,536	1,658
Total Liabilities and Stockholders' Equity	$ 12,822	$ 12,531