Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
OPERATING ACTIVITIES
Net income	$ 68.3	$ 7.4
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation	9.8	9.9
Amortization of discounts and fees	19.7	18.1
Stock based compensation expense	10.1	6.6
Loss (gain) on early retirement of debt, net	(0.1)	4.2
Gain on sale of marketable securities	(0.2)	(0.1)
Inventory impairments and land option cost write-offs	2.2	22.7
Changes in operating assets and liabilities:
Increase in construction in progress and finished homes	(72.2)	(48.3)
Increase in residential land and lots - developed, under development, and held for development	(112.8)	(4.6)
(Increase) decrease in other assets	(1.7)	47.0
(Increase) decrease in income taxes receivable	(0.5)	2.0
(Increase) decrease in mortgage loans held for sale	(3.2)	47.3
Decrease in accounts payable, accrued expenses and other liabilities	(2.0)	(133.3)
Net cash used in operating activities	(82.6)	(21.1)
INVESTING ACTIVITIES
Purchases of property and equipment	(5.5)	(8.2)
Purchases of marketable securities	(162.8)	(185.9)
Proceeds from the sale or maturity of marketable securities	157.5	187.7
Decrease in restricted cash	8.4	8.7
Net cash (used in) provided by investing activities	(2.4)	2.3
FINANCING ACTIVITIES
Proceeds from notes payable	47.3
Repayment of notes payable	(12.9)	(186.6)
Proceeds from stock associated with certain employee benefit plans	21.6	1.2
Cash dividends paid	(23.8)	(24.0)
Net cash provided by (used in) financing activities	32.2	(209.4)
DECREASE IN CASH AND CASH EQUIVALENTS	(52.8)	(228.2)
Cash and cash equivalents at beginning of period	732.6	1,309.3
Cash and cash equivalents at end of period	$ 679.8	$ 1,081.1