CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities:
Net income	$ 516,644	$ 531,551
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	300,770	289,878
Impairment charges	41,037	14,351
Stock-based compensation expense	29,045	19,861
Deferred income taxes	60,706	56,882
Equity investment income (loss), net	2,631	(434)
Loss (gain) on sales of business interests, net	23,022	(59,053)
Other non-cash charges, net	25,857	44,337
Changes in operating assets and liabilities, net of effect of acquisitions and divestitures:
Accounts receivable	(288,437)	(101,746)
Inventories	11,542	71,632
Other receivables and other current assets	(5,142)	(91,685)
Other long-term assets	(410)	3,454
Accounts payable	(68,887)	35,228
Accrued compensation and benefits	(88,473)	23,818
Other current liabilities	151,780	58,321
Income taxes	57,551	24,356
Other long-term liabilities	(18,121)	3,824
Net cash provided by operating activities	751,115	924,575
Cash flows from investing activities:
Additions of property and equipment	(373,918)	(473,977)
Acquisitions	(65,970)	(89,465)
Proceeds from asset and business sales	3,851,381	116,241
Purchase of other debt and equity investments	(4,812)	(4,195)
Purchase of investments held-to-maturity	(3,322)	(3,726)
Proceeds from sale of other debt and equity investments	5,893	5,662
Proceeds from investments held-to-maturity	0	32,628
Purchase of equity investments	(6,715)	(10,241)
Distributions received on equity investments	155	3,009
Net cash provided by (used in) investing activities	3,402,692	(424,064)
Cash flows from financing activities:
Borrowings	32,367,300	28,128,131
Payments on long-term debt and other financing costs	(33,531,409)	(27,556,348)
Purchase of treasury stock	(73,078)	(805,179)
Distributions to noncontrolling interests	(95,714)	(94,006)
Stock award exercises and other share issuances, net	2,107	3,132
Contributions from noncontrolling interests	31,281	31,569
Proceeds from sales of additional noncontrolling interest	0	15
Purchases of noncontrolling interests	(11,040)	(13,223)
Net cash used in financing activities	(1,310,553)	(305,909)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(77)	(3,473)
Net increase in cash, cash equivalents and restricted cash	2,843,177	191,129
Cash, cash equivalents and restricted cash of continuing operations at beginning of the year	415,420	518,920
Cash, cash equivalents and restricted cash of continuing operations at end of the period	3,682,410	480,148
Discontinued Operations
Cash flows from financing activities:
Net increase in cash, cash equivalents and restricted cash	(423,813)	229,901
Continuing Operations
Cash flows from financing activities:
Net increase in cash, cash equivalents and restricted cash	$ 3,266,990	$ (38,772)