Changes in Equity (Tables)

6 Months Ended

Jun. 30, 2012

Changes in Equity

Changes in shareholders' equity and changes in equity of noncontrolling interests

	Three Months Ended June 30, 2012									Three Months Ended June 30, 2011
	Common Shareholders			Noncontrolling Interests			Total			Common Shareholders			Noncontrolling Interests			Total
Beginning balance, April 1	$	3,744,917		$	116,512		$	3,861,429		$	3,631,411		$	97,360		$	3,728,771
Net income	122,345			7,766			130,111			86,685			7,154			93,839
Other comprehensive income	17,459			—			17,459			6,646			—			6,646
Total comprehensive income	139,804			7,766			147,570			93,331			7,154			100,485
Issuance of capital stock	2,525			—			2,525			3,505			—			3,505
Reissuance of treasury stock - net	5,113			—			5,113			—			—			—
Other (primarily stock compensation)	631			—			631			(33		)	—			(33		)
Dividends on common stock	(114,955		)	—			(114,955		)	(114,509		)	—			(114,509		)
Net capital activities by noncontrolling interests	—			(2,976		)	(2,976		)	—			(2,609		)	(2,609		)
Ending balance, June 30	$	3,778,035		$	121,302		$	3,899,337		$	3,613,705		$	101,905		$	3,715,610

	Six Months Ended June 30, 2012									Six Months Ended June 30, 2011
	Common Shareholders			Noncontrolling Interests			Total			Common Shareholders			Noncontrolling Interests			Total
Beginning balance, January 1	$	3,821,850		$	108,736		$	3,930,586		$	3,683,327		$	91,899		$	3,775,226
Net income	114,088			15,542			129,630			71,550			12,615			84,165
Other comprehensive income	1,845			—			1,845			17,092			—			17,092
Total comprehensive income	115,933			15,542			131,475			88,642			12,615			101,257
Issuance of capital stock	5,225			—			5,225			17,065			—			17,065
Reissuance (purchase) of treasury stock - net	3,359			—			3,359			(3,530		)	—			(3,530		)
Other (primarily stock compensation)	3,981			—			3,981			(181		)	—			(181		)
Dividends on common stock	(172,313		)	—			(172,313		)	(171,618		)	—			(171,618		)
Net capital activities by noncontrolling interests	—			(2,976		)	(2,976		)	—			(2,609		)	(2,609		)
Ending balance, June 30	$	3,778,035		$	121,302		$	3,899,337		$	3,613,705		$	101,905		$	3,715,610