Consolidated Statements of Changes in Equity (USD $) In Thousands		Total	Subsidiaries' Preferred Stock	Common Stock	Treasury Stock	Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning Balance at Dec. 31, 2008		$ 8,060,592	$ 94,000	$ 2,482	$ (4,175,214)	$ 4,869,303	$ 7,382,719	$ (112,698)
Consolidated net income	[1]	1,251,050	19,958				1,231,092
Other comprehensive income (loss)		43,878						43,878
Common stock repurchases		(613,125)			(613,125)
Common stock issuances in settlement of equity unit purchase contracts		500,000		66		499,934
Common stock issuances related to stock plans		61,977			61,172	805
Common stock dividends declared		(576,913)					(576,913)
Preferred dividend requirements of subsidiaries	[1]	19,958	(19,958)
Capital stock and other expenses		(141)					(141)
Ending Balance (New Accounting Pronouncement)		0					6,365	(6,365)
Ending Balance at Dec. 31, 2009		8,707,360	94,000	2,548	(4,727,167)	5,370,042	8,043,122	(75,185)
Consolidated net income	[1]	1,270,305	20,063				1,250,242
Other comprehensive income (loss)		36,973						36,973
Common stock repurchases		(878,576)			(878,576)
Common stock issuances related to stock plans		78,364			80,932	(2,568)
Common stock dividends declared		(603,963)					(603,963)
Preferred dividend requirements of subsidiaries	[1]	20,063	(20,063)
Ending Balance at Dec. 31, 2010		8,590,400	94,000	2,548	(5,524,811)	5,367,474	8,689,401	(38,212)
Consolidated net income	[1]	1,367,372	20,933				1,346,439
Other comprehensive income (loss)		(130,240)						(130,240)
Common stock repurchases		(234,632)			(234,632)
Common stock issuances related to stock plans		72,183			78,975	(6,792)
Common stock dividends declared		(588,880)					(588,880)
Preferred dividend requirements of subsidiaries	[1]	20,933	(20,933)
Ending Balance at Dec. 31, 2011		$ 9,055,270	$ 94,000	$ 2,548	$ (5,680,468)	$ 5,360,682	$ 9,446,960	$ (168,452)

[1] Consolidated net income and preferred dividend requirements of subsidiaries for 2011, 2010 and 2009 include $13.3 million of preferred dividends on subsidiaries' preferred stock without sinking fund that is not presented as equity.