Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current Assets
Cash and cash equivalents	$ 772,751	$ 569,719
Restricted cash	24,898	83,769
Investments in marketable equity securities and other investments	226,752	522,318
Accounts receivable, net	571,357	428,653
Income taxes receivable	0	17,991
Deferred income taxes	934	0
Inventories and contracts in progress	11,309	2,924
Other current assets	81,462	77,013
Current assets of discontinued operations (includes $1,235 of cash)	1,240	0
Total Current Assets	1,690,703	1,702,387
Property, Plant and Equipment, Net	860,829	927,542
Investments in Affiliates	19,811	15,754
Goodwill, Net	1,348,710	1,288,622
Indefinite-Lived Intangible Assets, Net	516,753	541,278
Amortized Intangible Assets, Net	96,947	39,588
Prepaid Pension Cost	1,152,488	1,245,505
Deferred Charges and Other Assets	65,258	50,370
Noncurrent assets of discontinued operations	820	0
Total Assets	5,752,319	5,811,046
Current Liabilities
Accounts payable and accrued liabilities	464,342	505,699
Income taxes payable	128,895	0
Deferred income taxes	0	58,411
Deferred revenue	410,146	366,831
Short-term borrowings	46,375	3,168
Current liabilities of discontinued operations	1,034	0
Total Current Liabilities	1,050,792	934,109
Postretirement Benefits Other Than Pensions	37,962	36,219
Accrued Compensation and Related Benefits	244,082	211,526
Other Liabilities	91,789	86,000
Deferred Income Taxes	754,960	778,735
Long-Term Debt	399,545	447,608
Total Liabilities	2,579,130	2,494,197
Commitments and Contingencies
Redeemable Noncontrolling Interest	21,904	5,896
Redeemable Preferred Stock, Series A, $1 par value, with a redemption and liquidation value of $1,000 per share; 23,000 shares authorized; 10,510 and 10,665 shares issued and outstanding	10,510	10,665
Preferred Stock, $1 par value; 977,000 shares authorized, none issued	0	0
Common Stockholders’ Equity
Capital in excess of par value	303,789	288,129
Retained earnings	6,008,506	4,782,777
Accumulated other comprehensive income, net of taxes
Cumulative foreign currency translation adjustment	8,548	25,013
Unrealized gain on available-for-sale securities	52,130	173,663
Unrealized gain on pensions and other postretirement plans	392,910	501,446
Cash flow hedge	(108)	(628)
Cost of 14,201,211 and 12,612,876 shares of Class B common stock held in treasury	(3,645,476)	(2,490,333)
Total Common Stockholders’ Equity	3,140,299	3,300,067
Noncontrolling interests	476	221
Total Equity	3,140,775	3,300,288
Total Liabilities and Equity	5,752,319	5,811,046
Class A Common Stock [Member]
Common Stockholders’ Equity
Common stock	975	1,169
Accumulated other comprehensive income, net of taxes
Total Equity	975	1,169
Class B Common Stock [Member]
Common Stockholders’ Equity
Common stock	19,025	18,831
Accumulated other comprehensive income, net of taxes
Total Equity	$ 19,025	$ 18,831