Consolidated Statements Of Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2012	$ 256,997	$ 4,639,563	$ 63,205	$ (483,576)	$ (368,593)	$ 11,675	$ 4,119,271
Balance (in shares) at Dec. 31, 2012	1,027,986,000				29,576,000
Stock plans		(31,045)			35,148		4,103
Stock plans (in shares)					2,113,000
Dividends on common stock		(199,866)					(199,866)
Net income			9,680			2,643	12,323
Other comprehensive income, net of tax				13,492			13,492
Distributions						(6,400)	(6,400)
Sale of Mohave partnership interest						(7,918)	(7,918)
Balance at Jun. 30, 2013	256,997	4,408,652	72,885	(470,084)	(333,445)		3,935,005
Balance (in shares) at Jun. 30, 2013	1,027,986,000				27,463,000
Stock plans		12,374			(4,705)		7,669
Stock plans (in shares)					(1,061,000)
Dividends on common stock		(99,970)	(99,932)				(199,902)
Net income			103,155				103,155
Pension settlement costs, net of tax				27,381			27,381
Other comprehensive income, net of tax				182,173			182,173
Balance at Dec. 31, 2013	256,997	4,321,056	76,108	(260,530)	(338,150)		4,055,481
Balance (in shares) at Dec. 31, 2013	1,027,986,000				28,524,000		999,462,000
Stock plans		(34,071)			39,294		5,223
Stock plans (in shares)					2,669,000
Dividends on common stock		(200,437)					(200,437)
Net income			76,954				76,954
Other comprehensive income, net of tax				5,929			5,929
Balance at Jun. 30, 2014	$ 256,997	$ 4,086,548	$ 153,062	$ (254,601)	$ (298,856)		$ 3,943,150
Balance (in shares) at Jun. 30, 2014	1,027,986,000				25,855,000		1,002,131,000