Equity Changes in Equity (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 5,152,014	$ 5,113,488	$ 4,905,730	$ 5,488,336
Net income	181,114	242,343	421,062	540,501
Other comprehensive income (loss)	92,681	(41,835)	227,236	(312,869)
Dividends paid	(61,963)	(56,027)	(123,328)	(119,031)
Stock incentive plan activity	17,057	17,934	56,286	39,832
Acquisition activity	(1,914)		(820)	(68,894)
Shares purchased at cost	(50,000)	(20,000)	(157,177)	(311,972)
Ending balance	5,328,989	5,255,903	5,328,989	5,255,903
Shareholders' Equity [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	5,141,124	5,017,264	4,896,515	5,383,854
Net income	180,962	240,766	420,703	537,784
Other comprehensive income (loss)	94,579	(41,825)	228,760	(314,361)
Dividends paid	(61,236)	(56,013)	(122,601)	(112,091)
Stock incentive plan activity	17,057	17,934	56,286	39,832
Acquisition activity	3,231		3,231	(64,920)
Shares purchased at cost	(50,000)	(20,000)	(157,177)	(311,972)
Ending balance	5,325,717	5,158,126	5,325,717	5,158,126
Noncontrolling Interests [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	10,890	96,224	9,215	104,482
Net income	152	1,577	359	2,717
Other comprehensive income (loss)	(1,898)	(10)	(1,524)	1,492
Dividends paid	(727)	(14)	(727)	(6,940)
Stock incentive plan activity	0	0	0	0
Acquisition activity	(5,145)		(4,051)	(3,974)
Shares purchased at cost	0	0	0	0
Ending balance	$ 3,272	$ 97,777	$ 3,272	$ 97,777