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Goodwill (Narrative) (Details) (USD $)	3 Months Ended			12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Jun. 30, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Jun. 30, 2010 Centex [Member]	Aug. 18, 2009 Centex [Member]
Goodwill							$ 2,500,000	$ 1,461,422,000
Impairments	(240,541,000)	(654,900,000)	(1,400,000)	(240,541,000)	(656,298,000)	(562,990,000)
Disposals			(1,593,000)		(1,593,000)
Goodwill, Impaired, Accumulated Impairment Loss				$ 1,800,000,000	$ 1,600,000,000

X

- Definition

Amount of goodwill arising from a business combination, which is the excess of the cost of the acquired entity over the amounts assigned to assets acquired and liabilities assumed.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 52

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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X

- Definition

The accumulated impairment losses related to goodwill as of the balance sheet date.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

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- Definition

Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

+ References

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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- Definition

Write-off of the carrying amount of goodwill associated with all or a portion of a reporting unit that is sold in the period.

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