Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
OPERATING ACTIVITIES
Net income	$ 856.2	$ 36.0
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation	14.4	14.9
Amortization of discounts and fees	29.9	27.6
Stock based compensation expense	14.3	9.9
Deferred income taxes	(716.7)	0
(Gain) loss on early retirement of debt, net	(0.1)	10.7
Gain on sale of marketable securities	(0.2)	(0.1)
Inventory impairments and land option cost write-offs	4.7	32.6
Changes in operating assets and liabilities:
Increase in construction in progress and finished homes	(204.8)	(148.2)
(Increase) decrease in residential land and lots - developed, under development, and held for development	(207.7)	34.7
(Increase) decrease in other assets	(8.6)	39.3
(Increase) decrease in income taxes receivable	(0.5)	2.0
Increase in mortgage loans held for sale	(1.0)	(32.4)
Increase (decrease) in accounts payable, accrued expenses and other liabilities	42.9	(102.3)
Net cash used in operating activities	(177.2)	(75.3)
INVESTING ACTIVITIES
Purchases of property and equipment	(23.8)	(12.8)
Purchases of marketable securities	(188.7)	(259.7)
Proceeds from the sale or maturity of marketable securities	196.8	254.7
Decrease in restricted cash	7.6	3.3
Net cash used in investing activities	(8.1)	(14.5)
FINANCING ACTIVITIES
Proceeds from notes payable	377.6	29.8
Repayment of notes payable	(14.5)	(336.5)
Proceeds from stock associated with certain employee benefit plans	30.3	2.7
Cash dividends paid	(35.8)	(35.9)
Purchase of treasury stock	0	(38.6)
Net cash provided by (used in) financing activities	357.6	(378.5)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	172.3	(468.3)
Cash and cash equivalents at beginning of period	732.6	1,309.3
Cash and cash equivalents at end of period	$ 904.9	$ 841.0