Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
OPERATING ACTIVITIES
Net income	$ 323.2	$ 856.2
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation	16.0	14.4
Amortization of discounts and fees	29.7	29.9
Stock based compensation expense	13.1	14.3
Deferred income taxes	79.5	(716.7)
(Gain) loss on early retirement of debt, net	0	(0.1)
Gain on sale of marketable securities	(0.2)	(0.2)
Inventory impairments and land option cost write-offs	4.0	4.7
Changes in operating assets and liabilities:
Increase in construction in progress and finished homes	(692.1)	(204.8)
(Increase) decrease in residential land and lots - developed, under development, and held for development	(1,046.5)	(207.7)
(Increase) decrease in other assets	(7.1)	(5.4)
(Increase) decrease in income taxes receivable	14.4	(0.5)
Increase in mortgage loans held for sale	(12.9)	(1.0)
Increase (decrease) in accounts payable, accrued expenses and other liabilities	142.6	42.9
Net cash used in operating activities	(1,136.3)	(174.0)
INVESTING ACTIVITIES
Purchases of property and equipment	(40.6)	(23.8)
Purchases of marketable securities	(28.9)	(188.7)
Proceeds from the sale or maturity of marketable securities	325.4	196.8
Decrease in restricted cash	(19.3)	7.6
Net principal increase of mortgage loans held in portfolio and real estate owned	(1.0)	(3.2)
Payments to Acquire Other Investments	(18.6)	0
Payments for (Proceeds from) Other Investing Activities	1.4	0
Acquisition of a business	(9.4)	0
Net cash used in investing activities	209.0	(11.3)
FINANCING ACTIVITIES
Proceeds from notes payable	892.0	377.6
Repayment of notes payable	(342.1)	(14.5)
Proceeds from stock associated with certain employee benefit plans	27.9	30.3
Cash dividends paid	(60.2)	(35.8)
Net cash provided by (used in) financing activities	517.6	357.6
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(409.7)	172.3
Cash and cash equivalents at beginning of period	1,047.7	732.6
Cash and cash equivalents at end of period	638.0	904.9
Supplemental disclosures of non-cash activities:
Notes payable issued for inventory	11.4	4.1
Stock issued under Restricted Stock Unit and Performance Unit Plans	$ 3.9	$ 3.1