Net Income (Loss) Per Share (Reconciliation Of Earnings, Basic And Diluted) (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Income (loss) as reported, Continuing Operations	$ 267,284	$ 146,838	$ 196,446	$ 403,633
Income (loss) from discontinued operations, net of tax	(1,584)	41,851	413,058	45,662
Profit Loss	265,700	188,689	609,504	449,295
Net income attributable to the noncontrolling interests	(20,123)	(21,113)	(15,333)	(36,465)
Participating basic distributed earnings	(4,847)	(4,083)	(10,849)	(9,390)
Basic income (loss) attributable to common stockholders	240,730	163,493	583,322	403,440
Reallocation of participating earnings	164	112	271	110
Diluted income (loss) attributable to common stockholders	240,894	163,605	583,593	403,550
Segment, Continuing Operations [Member]
Income (loss) as reported, Continuing Operations	267,284	146,838	196,446	403,633
Net income attributable to the noncontrolling interests	(20,123)	(21,113)	(15,333)	(36,465)
Participating basic distributed earnings	(4,847)	(3,063)	(3,307)	(8,351)
Basic income (loss) attributable to common stockholders	242,314	122,662	177,806	358,817
Reallocation of participating earnings	164	84	82	98
Diluted income (loss) attributable to common stockholders	242,478	122,746	177,888	358,915
Segment, Discontinued Operations [Member]
Income (loss) from discontinued operations, net of tax	(1,584)	41,851	413,058	45,662
Participating basic distributed earnings		(1,020)	(7,542)	(1,039)
Basic income (loss) attributable to common stockholders	(1,584)	40,831	405,516	44,623
Reallocation of participating earnings		28	189	12
Diluted income (loss) attributable to common stockholders	$ (1,584)	$ 40,859	$ 405,705	$ 44,635