Condensed Combined Consolidated Statements of Cash Flows (Unaudited) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)
Operating Activities:
Net income	$ 218	$ 367	$ 2,465
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	69	139	143
Gain on sales of assets, net	(7)	(96)
Equity in earnings from investments in affiliates	(8)	(12)	(12)
Loss on foreign currency transactions		3	3
Other (gain) loss, net		(108)	1
Share-based compensation expense		8	7
Amortization of deferred financing costs		2	2
Distributions from unconsolidated affiliates		6	7
Deferred income taxes		(3)	(2,312)
Changes in operating assets and liabilities		(158)	(30)
Net cash provided by operating activities		148	274
Investing Activities:
Capital expenditures for property and equipment		(86)	(86)
Proceeds from asset dispositions, net		368
Proceeds from the sale of investments in affiliates		150
Insurance proceeds for property damage claims		35
Investments in affiliates			(1)
Distributions from unconsolidated affiliates			1
Net cash provided by (used in) investing activities		467	(86)
Financing Activities:
Dividends paid		(204)	(202)
Distributions to noncontrolling interests		(1)	(2)
Tax withholdings on share-based compensation		(2)	(2)
Repurchase of common stock		(348)
Net transfers to Parent			(9)
Net cash used in financing activities		(555)	(215)
Effect of exchange rate changes on cash and cash equivalents and restricted cash		(1)	1
Net increase (decrease) in cash and cash equivalents and restricted cash		59	(26)
Cash and cash equivalents and restricted cash, beginning of period		379	350
Cash and cash equivalents and restricted cash, end of period	438	438	324
Non-cash financing activities:
Dividends paid in stock			441
Dividends declared but unpaid	$ 177	$ 177	$ 92