Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net income (loss)	$ 1,355	$ (243)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depletion, depreciation and amortization	1,825	1,243
Exploration expenses	3	8
Deferred income taxes	371	(36)
Gain on disposition of assets, net	(14)	(7)
Loss on early extinguishment of debt, net	2	27
Accretion of discount on asset retirement obligations	5	7
Interest expense	19	34
Derivative-related activity	636	129
Amortization of stock-based compensation	87	54
Investment in affiliate valuation adjustment	(21)	119
South Texas contingent consideration valuation adjustment	0	42
South Texas deficiency fee obligation	0	69
Other	116	94
Change in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	(601)	371
Inventories	(93)	13
Other assets	24	24
Accounts payable	515	(164)
Interest payable	(76)	(37)
Other liabilities	(318)	(201)
Net cash provided by operating activities	3,835	1,546
Cash flows from investing activities:
Proceeds from disposition of assets	59	58
Cash used in acquisitions, net of cash acquired	(826)	0
Additions to oil and gas properties	(2,191)	(1,297)
Additions to other assets and other property and equipment	(77)	(103)
Net cash used in investing activities	(3,035)	(1,342)
Cash flows from financing activities:
Proceeds from issuance of senior notes, net of discount	3,247	1,091
Proceeds from issuance of convertible senior notes	0	1,323
Purchase of derivatives related to issuance of convertible senior notes	0	(113)
Borrowings under credit facility	650	800
Repayment of credit facilities	(1,287)	(800)
Repayment of senior notes, including tender offer premiums	(3,371)	(1,198)
Payments of other liabilities	(153)	(162)
Payments of financing fees	(32)	(36)
Purchases of treasury stock	(19)	(174)
Exercise of long-term incentive plan stock options and employee stock purchases	11	6
Dividends paid	(720)	(255)
Net cash provided by (used in) financing activities	(1,674)	482
Net increase (decrease) in cash, cash equivalents and restricted cash	(874)	686
Cash, cash equivalents and restricted cash, beginning of period	1,501	705
Cash, cash equivalents and restricted cash, end of period	$ 627	$ 1,391