CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Cash Flows [Abstract]
Net income	$ 65	$ 191
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	208	204
Deferred income tax expense	19	70
Stock-based compensation expense	11	9
Impairment and restructuring charges, and acquisition-related costs	19	47
Litigation and investigation costs	13	6
Net losses (gains) on sales, consolidation and deconsolidation of facilities	1	(110)
Loss from early extinguishment of debt	47	1
Equity in earnings of unconsolidated affiliates, net of distributions received	3	9
Amortization of debt discount and debt issuance costs	11	11
Pre-tax income from discontinued operations	(10)	(1)
Other items, net	(7)	(1)
Changes in cash from operating assets and liabilities:
Accounts receivable	(158)	(66)
Inventories and other current assets	(115)	(41)
Income taxes	9	0
Accounts payable, accrued expenses and other current liabilities	(109)	(183)
Other long-term liabilities	37	1
Payments for restructuring charges, acquisition-related costs, and litigation costs and settlements	(32)	(33)
Net cash used in operating activities from discontinued operations, excluding income taxes	(2)	(1)
Net cash provided by operating activities	10	113
Cash flows from investing activities:
Purchases of property and equipment — continuing operations	(192)	(143)
Purchases of businesses or joint venture interests, net of cash acquired	(2)	(16)
Proceeds from sales of facilities and other assets — continuing operations	41	425
Proceeds from sales of facilities and other assets — discontinued operations	17	0
Proceeds from sales of marketable securities, long-term investments and other assets	4	134
Purchases of equity investments	(1)	(30)
Other long-term assets	(2)	7
Other items, net	(4)	(4)
Net cash provided by (used in) investing activities	(139)	373
Cash flows from financing activities:
Repayments of borrowings under credit facility	(495)	0
Proceeds from borrowings under credit facility	685	0
Repayments of other borrowings	(1,620)	(91)
Proceeds from other borrowings	1,507	7
Debt issuance costs	(18)	0
Distributions paid to noncontrolling interests	(74)	(64)
Proceeds from sales of noncontrolling interests	4	5
Purchases of noncontrolling interests	(3)	(9)
Proceeds from exercise of stock options and employee stock purchase plan	1	9
Other items, net	(17)	20
Net cash used in financing activities	(30)	(123)
Net increase (decrease) in cash and cash equivalents	(159)	363
Cash and cash equivalents at beginning of period	411	611
Cash and cash equivalents at end of period	252	974
Supplemental disclosures:
Interest paid, net of capitalized interest	(158)	(169)
Income tax refunds, net	$ 9	$ 1