CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income	$ 434,883	$ 489,876
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	435,878	593,527
Impairment charges	20,444	701,523
Stock-based compensation expense	59,605	28,478
Deferred income taxes	200,056	(132,781)
Equity investment income (loss), net	8,611	19,071
Gain on sales of business interests, net	(57,547)	(23,402)
Other non-cash charges, net	164,856	41,703
Changes in operating assets and liabilities, net of effect of acquisitions and divestitures:
Accounts receivable	(74,622)	(146,024)
Inventories	88,355	14,272
Other receivables and other current assets	(757)	(43,556)
Other long-term assets	2,142	(13,831)
Accounts payable	(12,800)	18,595
Accrued compensation and benefits	40,225	(60,063)
Other current liabilities	45,624	39,445
Income taxes	21,749	22,669
Other long-term liabilities	5,546	18,648
Net cash provided by operating activities	1,382,248	1,568,150
Cash flows from investing activities:
Additions of property and equipment	(705,659)	(639,829)
Acquisitions	(113,526)	(726,538)
Proceeds from asset and business sales	135,268	92,529
Purchase of investments available for sale	(5,791)	(9,882)
Purchase of investments held-to-maturity	(3,728)	(223,482)
Proceeds from sale of investments available for sale	8,783	5,822
Proceeds from investments held-to-maturity	32,628	398,765
Purchase of equity investments	(12,874)	(3,014)
Distributions received on equity investments	3,580	80
Net cash used in investing activities	(661,319)	(1,105,549)
Cash flows from financing activities:
Borrowings	41,674,279	38,160,821
Payments on long-term debt and other financing costs	(40,828,443)	(38,269,284)
Purchase of treasury stock	(1,161,511)	(321,411)
Stock award exercises and other share issuances, net	8,803	15,781
Distributions to noncontrolling interests	(139,673)	(165,463)
Contributions from noncontrolling interests	43,179	51,156
Proceeds from sales of additional noncontrolling interests	15	0
Purchases of noncontrolling interests	(19,988)	(1,432)
Net cash used in financing activities	(423,339)	(529,832)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(5,790)	5,449
Net decrease in cash, cash equivalents and restricted cash from continuing operations	291,800	(61,782)
Cash, cash equivalents and restricted cash of continuing operations at beginning of the year	518,920	683,463
Cash, cash equivalents and restricted cash of continuing operations at end of the period	540,155	538,987
Discontinued Operations
Cash flows from financing activities:
Net decrease in cash, cash equivalents and restricted cash from continuing operations	270,565	82,694
Continuing Operations
Cash flows from financing activities:
Net decrease in cash, cash equivalents and restricted cash from continuing operations	$ 21,235	$ (144,476)