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Stock Compensation Plans (Stock Option Activity Rollforward) (Details) (Stock Options [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Stock Options [Member]
Stock Option Activity [Roll Forward]
Outstanding, beginning of year	24,004	26,193	20,059
Granted	441	1,128	8,235	[1]
Exercised	0	(902)	(756)
Forfeited	(2,804)	(2,415)	(1,345)
Outstanding, end of year	21,641	24,004	26,193
Options exercisable at year end	18,845	19,400	20,336
Weighted-average per share fair value of options granted during the year	$ 4.46	$ 6.43	$ 2.19
Outstanding, weighted-average per share exercise price, beginning of year	$ 21	$ 21	$ 19
Granted, weighted-average per share exercise price	$ 8	$ 11	$ 27
Exercised, weighted-average per share exercise price	$ 0	$ 10	$ 6
Forfeited, weighted-average per share exercise price	$ 15	$ 21	$ 45
Options outstanding, weighted-average per share exercise price, end of year	$ 21	$ 21	$ 21
Options exercisable at year end, weighted-average per share exercise price	$ 23	$ 23	$ 23
[1] 2009 includes 5.3 million options issued in conjunction with the Centex merger.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The combined weighted average exercise price associated with stock options during the period that have either lapsed or been forfeited.

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