Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Statement of Cash Flows [Abstract]
Cash and cash equivalents at beginning of year	$ 2,269,756	$ 213,734
Cash flows from operating activities:
Net income (loss)	176,346	(67,206)
Adjustments to reconcile net income (loss) to cash flows from operating activities:
Depreciation and amortization	94,192	128,505
Gain on acquisition	(7,433)	0
Gain on sales of businesses, net	0	(122,298)
Stock-based compensation	9,492	8,733
Equity in net income of unconsolidated investments (net of tax)	(36,219)	(30,861)
Dividends received from unconsolidated investments and nonmarketable securities	8,454	31,522
Pension and postretirement (benefit) expense	(7)	3,390
Pension and postretirement contributions	(6,288)	(9,524)
Unrealized gain on investments in marketable securities	(1,553)	(10)
Loss on early extinguishment of debt	52,801	0
Deferred income taxes	(3,204)	414,736
Working capital changes	(353,138)	(108,016)
Other, net	12,102	3,878
Net cash (used in) provided by operating activities	(54,455)	252,849
Cash flows from investing activities:
Acquisitions, net of cash acquired	(39,525)	0
Cash payments related to acquisitions and other	0	(81,988)
Capital expenditures	(97,765)	(99,509)
Cash proceeds from divestitures, net	6,857	310,599
Sales of marketable securities, net	208	969
Repayments from joint ventures	1,250	0
Net cash (used in) provided by investing activities	(128,975)	130,071
Cash flows from financing activities:
Repayments of long-term debt	(751,209)	(382,162)
Other borrowings, net	58,886	67,865
Fees related to early extinguishment of debt	(46,959)	0
Dividends paid to shareholders	(69,762)	(66,791)
Dividends paid to noncontrolling interests	(17,930)	(17,052)
Repurchases of common stock	(250,000)	0
Proceeds from exercise of stock options	3,337	4,939
Withholding taxes paid on stock-based compensation award distributions	(8,169)	(1,982)
Net cash used in financing activities	(1,081,806)	(395,183)
Net effect of foreign exchange on cash and cash equivalents	2,425	(7,810)
Decrease in cash and cash equivalents	(1,262,811)	(20,073)
Cash and cash equivalents at end of period	$ 1,006,945	$ 193,661