Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current Assets
Cash and cash equivalents	$ 648,885	$ 754,207
Restricted cash	21,931	20,745
Investments in marketable equity securities and other investments	448,241	379,445
Accounts receivable, net	615,101	572,435
Income taxes receivable	41,635	48,383
Inventories and contracts in progress	34,818	32,068
Other current assets	60,735	53,439
Total Current Assets	1,871,346	1,860,722
Property, Plant and Equipment, Net	233,664	231,123
Investments in Affiliates	58,806	59,229
Goodwill, Net	1,122,954	1,017,513
Indefinite-Lived Intangible Assets, Net	66,026	21,885
Amortized Intangible Assets, Net	107,939	107,191
Prepaid Pension Cost	881,593	979,970
Deferred Income Taxes	17,246	0
Deferred Charges and Other Assets	73,096	75,192
Total Assets	4,432,670	4,352,825
Current Liabilities
Accounts payable and accrued liabilities	500,726	428,014
Deferred revenue	312,107	297,135
Current portion of long-term debt	6,128	0
Total Current Liabilities	818,961	725,149
Postretirement Benefits Other Than Pensions	21,859	33,947
Accrued Compensation and Related Benefits	195,910	203,280
Other Liabilities	65,554	70,678
Deferred Income Taxes	379,092	403,316
Mandatorily Redeemable Noncontrolling Interest	12,584	0
Long-Term Debt	485,719	399,800
Total Liabilities	1,979,679	1,836,170
Commitments and Contingencies (Notes 17 and 18)
Redeemable Noncontrolling Interests	50	25,957
Preferred Stock, $1 par value; 977,000 shares authorized, none issued	0	0
Common Stockholders’ Equity
Capital in excess of par value	364,363	356,887
Retained earnings	5,588,942	5,447,677
Accumulated other comprehensive income, net of taxes
Cumulative foreign currency translation adjustment	(26,998)	(4,849)
Unrealized gain on available-for-sale securities	92,931	58,500
Unrealized gain on pensions and other postretirement plans	170,830	261,029
Cash flow hedge	(277)	0
Cost of 14,423,564 and 14,196,146 shares of Class B common stock held in treasury	(3,756,850)	(3,648,546)
Total Equity	2,452,941	2,490,698
Total Liabilities and Equity	4,432,670	4,352,825
Class A Common Stock [Member]
Common Stockholders’ Equity
Common stock	964	964
Class B Common Stock [Member]
Common Stockholders’ Equity
Common stock	$ 19,036	$ 19,036