CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Cash Flows [Abstract]
Net income	$ 159	$ 72
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	203	208
Deferred income tax (benefit) expense	(79)	22
Stock-based compensation expense	13	11
Impairment and restructuring charges, and acquisition-related costs	55	19
Litigation and investigation costs	2	13
Net losses (gains) on sales, consolidation and deconsolidation of facilities	(2)	1
Loss from early extinguishment of debt	0	47
Equity in earnings of unconsolidated affiliates, net of distributions received	(11)	3
Amortization of debt discount and debt issuance costs	10	11
Pre-tax loss (income) from discontinued operations	1	(10)
Other items, net	2	(7)
Changes in cash from operating assets and liabilities:
Accounts receivable	14	(158)
Inventories and other current assets	23	(115)
Income taxes	2	9
Accounts payable, accrued expenses and other current liabilities	(144)	(119)
Other long-term liabilities	(51)	37
Payments for restructuring charges, acquisition-related costs, and litigation costs and settlements	(68)	(32)
Net cash used in operating activities from discontinued operations, excluding income taxes	0	(2)
Net cash provided by operating activities	129	10
Cash flows from investing activities:
Purchases of property and equipment — continuing operations	(182)	(192)
Purchases of businesses or joint venture interests, net of cash acquired	(55)	(2)
Proceeds from sales of facilities and other assets — continuing operations	11	41
Proceeds from sales of facilities and other assets — discontinued operations	0	17
Proceeds from sales of marketable securities, long-term investments and other assets	10	4
Purchases of marketable securities and equity investments	(4)	(4)
Other long-term assets	(2)	(2)
Other items, net	18	(1)
Net cash used in investing activities	(204)	(139)
Cash flows from financing activities:
Repayments of borrowings under credit facility	(240)	(495)
Proceeds from borrowings under credit facility	740	685
Repayments of other borrowings	(48)	(1,620)
Proceeds from other borrowings	7	1,507
Debt issuance costs	(1)	(18)
Distributions paid to noncontrolling interests	(76)	(74)
Proceeds from sale of noncontrolling interests	2	4
Purchases of noncontrolling interests	0	(3)
Proceeds from exercise of stock options and employee stock purchase plan	2	1
Other items, net	40	(17)
Net cash provided by (used in) financing activities	426	(30)
Net increase (decrease) in cash and cash equivalents	351	(159)
Cash and cash equivalents at beginning of period	262	411
Cash and cash equivalents at end of period	613	252
Supplemental disclosures:
Interest paid, net of capitalized interest	(172)	(158)
Income tax (payments) refunds, net	$ (3)	$ 9