COMMON SHAREHOLDER EQUIT AND NCI (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Shareholders' Equity, Beginning Balance			$ 9,611,528,000
Net Income	236,493,000	211,380,000	603,576,000	614,413,000
Dividends on Common Shares			0
Issuance of Common Shares			0
Other Transcations, Net	0		0
Net Income Attributable to Noncontrolling Interests	1,879,000	1,879,000	5,639,000	5,803,000
Other Comprehensive Income (Loss), Net of Tax	1,335,000	2,082,000	5,859,000	5,467,000
Shareholders' Equity, Ending Balance	9,890,552,000		9,890,552,000
Common Shareholders Equity [Member]
Shareholders' Equity, Beginning Balance	9,753,800,000	9,406,600,000	9,611,500,000	9,237,100,000
Net Income	236,500,000	211,400,000	603,600,000	614,400,000
Dividends on Common Shares	(124,200,000)	(114,900,000)	(372,200,000)	(346,900,000)
Dividends on Preferred Stock	(1,900,000)	(1,900,000)	(5,600,000)	(5,800,000)
Issuance of Common Shares	1,000,000	1,400,000	6,400,000	10,200,000
Other Transcations, Net	24,100,000	12,800,000	41,000,000	3,000,000
Net Income Attributable to Noncontrolling Interests			0	0
Other Comprehensive Income (Loss), Net of Tax	1,300,000	2,100,000	5,900,000	5,500,000
Shareholders' Equity, Ending Balance	9,890,600,000	9,517,500,000	9,890,600,000	9,517,500,000
Noncontrolling Interest Member
Net Income				0
Dividends on Common Shares				0
Issuance of Common Shares				0
Other Transcations, Net				0
Preferred Stock Member
Shareholders' Equity, Beginning Balance	155,600,000	155,600,000	155,600,000	155,600,000
Net Income			0
Dividends on Preferred Stock	(1,900,000)	(1,900,000)	(5,600,000)	(5,800,000)
Net Income Attributable to Noncontrolling Interests	1,900,000	1,900,000	5,600,000	5,800,000
Shareholders' Equity, Ending Balance	$ 155,600,000	$ 155,600,000	$ 155,600,000	$ 155,600,000