Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 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	62,657	235,548
Adjustments to reconcile net income to cash flows from operating activities:
Depreciation and amortization	45,070	60,552
Gain on acquisition	(7,433)	0
Gain on sales of businesses, net	0	(121,324)
Stock-based compensation	5,046	4,007
Equity in net income of unconsolidated investments (net of tax)	(21,171)	(16,566)
Dividends received from unconsolidated investments and nonmarketable securities	2,551	200
Pension and postretirement (benefit) expense	(26)	1,389
Pension and postretirement contributions	(2,891)	(4,224)
Unrealized (gain) loss on investments in marketable securities	(873)	1,044
Loss on early extinguishment of debt	52,801	0
Deferred income tax expense	1,363	816
Working capital changes	(63,325)	10,467
Other, net	8,816	799
Net cash provided by operating activities	82,585	172,708
Cash flows from investing activities:
Acquisitions, net of cash acquired	(27,742)	0
Cash payments related to acquisitions and other	0	(81,988)
Capital expenditures	(54,143)	(58,120)
Cash proceeds from divestitures, net	0	307,165
Sales of marketable securities, net	492	1,191
Repayments from joint ventures	1,250	0
Net cash (used in) provided by investing activities	(80,143)	168,248
Cash flows from financing activities:
Repayments of long-term debt	(751,209)	(331,595)
Other borrowings, net	66,384	68,829
Fees related to early extinguishment of debt	(46,959)	0
Dividends paid to shareholders	(34,330)	(32,541)
Repurchases of common stock	(250,000)	0
Proceeds from exercise of stock options	2,170	0
Withholding taxes paid on stock-based compensation award distributions	(7,855)	(1,969)
Net cash used in financing activities	(1,021,799)	(297,276)
Net effect of foreign exchange on cash and cash equivalents	4,137	(5,032)
(Decrease) increase in cash and cash equivalents	(1,015,220)	38,648
Cash and cash equivalents at end of period	$ 1,254,536	$ 252,382