Consolidated Statements of Cash Flows (USD $)
In Millions, unless otherwise specified
12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2010
Cash Flows from Operating Activities:      
Net (loss) earnings $ 49.9 $ (424.3) $ 92.0
Adjustments to reconcile of net (loss) earnings to net cash provided by operating activities:      
Depreciation and amortization 63.2 58.7 55.4
Impairment of goodwill and other intangible assets 0 566.5 19.4
Stock-based compensation expense 4.5 1.7 1.9
Deferred income taxes (2.6) (69.0) (11.1)
Other, net 4.1 1.6 7.2
Other changes in current assets and liabilities, net      
Decrease (increase) in receivables (45.9) 55.6 14.8
Increase in receivable from Ralcorp 41.3 (41.3) 0
Change in due to/from Kraft Foods Inc. 0 0 (13.6)
Decrease (increase) in inventories (11.7) 3.7 14.4
(Increase) decrease in prepaid expenses and other current assets (8.7) (1.8) (1.7)
(Decrease) increase in accounts payable and other current liabilities 49.9 (7.6) (43.1)
Net cash provided by operating activities 144.0 143.8 135.6
Cash Flows from Investing Activities:      
Additions to property and intangible assets (30.9) (14.9) (24.3)
Net cash used by investing activities (30.9) (14.9) (24.3)
Cash Flows from Financing Activities:      
Proceeds from issuance of Senior Notes 775.0 0 0
Proceeds from issuance of term loan 175.0 0 0
Payment to Ralcorp (900.0) 0 0
Repayments of long-term debt (4.4) 0 0
Purchases of treasury stock (53.4) 0 0
Change in net investment of Ralcorp (39.4) (192.3) (112.4)
Payments of debt issuance costs (17.7) 0 0
Changes in intercompany debt (7.8) (60.2) 0
Net cash used by financing activities (57.1) (132.1) (112.4)
Effect of exchange rate changes on cash 0.5 0.1 0.2
Net (decrease) increase in cash and cash equivalents 56.5 (3.1) (0.9)
Cash and cash equivalents, beginning of year 1.7 4.8 5.7
Cash and cash equivalents, end of year $ 58.2 $ 1.7 $ 4.8