Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current Assets
Cash and cash equivalents	$ 315,789	$ 390,014
Restricted cash	12,396	17,552
Investments in marketable equity securities and other investments	491,449	557,153
Accounts receivable, net	540,593	620,319
Income taxes receivable	5,304	23,901
Inventories and contracts in progress	66,949	60,612
Other current assets	88,956	66,253
Total Current Assets	1,521,436	1,735,804
Property, Plant and Equipment, Net	258,694	259,358
Investments in Affiliates	131,887	128,590
Goodwill, Net	1,301,484	1,299,710
Indefinite-Lived Intangible Assets, Net	103,916	102,195
Amortized Intangible Assets, Net	230,674	237,976
Prepaid Pension Cost	1,073,873	1,056,777
Deferred Income Taxes	15,367	15,367
Deferred Charges and Other Assets	123,627	102,046
Total Assets	4,760,958	4,937,823
Current Liabilities
Accounts payable and accrued liabilities	435,498	526,323
Deferred revenue	294,519	339,454
Income taxes payable	8,593	6,109
Current portion of long-term debt	406,654	6,726
Dividends declared	7,319	0
Total Current Liabilities	1,152,583	878,612
Postretirement Benefits Other Than Pensions	20,943	20,865
Accrued Compensation and Related Benefits	176,697	193,024
Other Liabilities	63,714	65,977
Deferred Income Taxes	356,018	362,701
Mandatorily Redeemable Noncontrolling Interest	10,331	10,331
Long-Term Debt	91,079	486,561
Total Liabilities	1,871,365	2,018,071
Redeemable Noncontrolling Interest	4,680	4,607
Preferred Stock	0	0
Common Stockholders’ Equity
Common stock	20,000	20,000
Capital in excess of par value	372,836	370,700
Retained earnings	6,022,315	5,791,724
Accumulated other comprehensive income (loss), net of tax
Cumulative foreign currency translation adjustment	17,878	6,314
Unrealized gain on available-for-sale securities	0	194,889
Unrealized gain on pensions and other postretirement plans	333,593	334,536
Cash Flow Hedge	7	(184)
Cost of Class B common stock held in treasury	(3,881,716)	(3,802,834)
Total Equity	2,884,913	2,915,145
Total Liabilities and Equity	$ 4,760,958	$ 4,937,823