Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Assets
Cash and cash equivalents	$ 386,567	$ 512,431
Restricted cash	30,351	28,538
Investments in marketable equity securities and other investments	495,219	418,938
Accounts receivable, net	364,963	399,204
Deferred income taxes	0	3,974
Inventories	4,541	7,985
Other current assets	84,227	82,692
Total Current Assets	1,365,868	1,453,762
Property, Plant and Equipment, Net	1,031,754	1,081,237
Investments In Affiliates	27,386	15,535
Goodwill, Net	1,288,419	1,317,915
Indefinite-Lived Intangible Assets, Net	539,728	539,728
Amortized Intangible Assets, Net	38,535	45,577
Prepaid Pension Cost	579,303	604,823
Deferred Charges and Other Assets	53,027	46,492
Total Assets	4,924,020	5,105,069
Liabilities and Equity
Accounts payable and accrued liabilities	447,538	486,396
Income taxes payable	15,061	726
Deferred income taxes	27,944	0
Deferred revenue	369,631	395,837
Dividends declared	213	0
Short-term borrowings	3,129	243,327
Total Current Liabilities	863,516	1,126,286
Postretirement Benefits Other Than Pensions	61,369	59,949
Accrued Compensation and Related Benefits	216,222	216,280
Other Liabilities	102,837	109,774
Deferred Income Taxes	531,384	529,427
Long-Term Debt	446,904	453,384
Total Liabilities	2,222,232	2,495,100
Redeemable Noncontrolling Interest	6,012	12,655
Redeemable Preferred Stock	10,665	11,096
Preferred Stock	0	0
Common Stockholders' Equity
Common stock	20,000	20,000
Capital in excess of par value	252,767	240,746
Retained earnings	4,596,167	4,546,775
Accumulated Other Comprehensive Income (Loss) [Abstract]
Cumulative foreign currency translation adjustment	18,372	26,072
Unrealized gain on available-for-sale securities	158,323	110,553
Unrealized gain on pensions and other postretirement plans	117,186	117,169
Cash flow hedge	(794)	(940)
Cost of Class B common stock held in treasury	(2,477,248)	(2,474,347)
Total Common Stockholders' Equity	2,684,773	2,586,028
Noncontrolling interests	338	190
Total Equity	2,685,111	2,586,218
Total Liabilities and Equity	$ 4,924,020	$ 5,105,069