CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
OPERATING ACTIVITIES
Net income (loss)	$ 651	$ (3,201)	$ 341
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	1,689	1,613	1,704
Goodwill impairment	0	3,708	0
Deferred income taxes	175	219	175
Changes in current assets and liabilities:
Accounts receivable	(63)	21	46
Accounts payable	(218)	(134)	(37)
Other assets and liabilities, net	(159)	(6)	4
Other assets and liabilities, affiliate	108	423	216
Changes in other noncurrent assets and liabilities, net	71	120	(22)
Other, net	30	(80)	(30)
Net cash provided by operating activities	2,284	2,683	2,397
INVESTING ACTIVITIES
Capital expenditures	(1,432)	(1,341)	(1,038)
Proceeds from notes receivable - affiliates	122	235	0
Proceeds from sale of property, plant and equipment and other assets	137	28	134
Net cash used in investing activities	(1,173)	(1,078)	(904)
FINANCING ACTIVITIES
Net proceeds from issuance of long-term debt	2,020	2,479	0
Distributions	(1,200)	(1,084)	(1,545)
Payments of long-term debt	(2,060)	(2,906)	(7)
Other	(4)	(28)	0
Net cash used in financing activities	(1,244)	(1,539)	(1,552)
Net (decrease) increase in cash, cash equivalents and restricted cash	(133)	66	(59)
Cash, cash equivalents and restricted cash at beginning of period	338	272	331
Cash, cash equivalents and restricted cash at end of period	205	338	272
Supplemental cash flow information:
Income taxes paid, net	(24)	(23)	(33)
Interest paid (net of capitalized interest of $23, $15 and $1)	(382)	(531)	(542)
Cash, cash equivalents and restricted cash:
Total	$ 338	$ 338	$ 272