Guarantor Financials - Consolidated Statements of Cash Flows (Details) (USD $) | 12 Months Ended |
In Millions, unless otherwise specified | Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2011 |
Cash Flows from Operating Activities: | ' | ' | ' |
Net cash provided by operating activities | $119.20 | $144 | $143.80 |
Cash Flows from Investing Activities: | ' | ' | ' |
Payments to Acquire Businesses, Net of Cash Acquired | 352.9 | 0 | 0 |
Additions to property and intangible assets | -32.8 | -30.9 | -14.9 |
Increase (Decrease) in Restricted Cash | 38.1 | 0 | 0 |
Payment for equity contributions | ' | 0 | ' |
Proceeds from equity distributions | 0 | 0 | ' |
Net cash used by investing activities | -423.8 | -30.9 | -14.9 |
Cash Flows from Financing Activities: | ' | ' | ' |
Proceeds from issuance of Senior Notes | 600 | 775 | 0 |
Proceeds from Issuance of Secured Debt | 0 | 175 | 0 |
Repayments of Related Party Debt | 0 | -900 | 0 |
Proceeds from issuance of preferred stock, net of issuance costs | 234 | 0 | 0 |
Repayments of long-term debt | -170.6 | -4.4 | 0 |
Payments of preferred stock dividend | -4.2 | 0 | 0 |
Purchases of treasury stock | 0 | -53.4 | 0 |
Change in net investment of Ralcorp | 0 | -39.4 | -192.3 |
Payments of Debt Issuance Costs | -10.5 | -17.7 | 0 |
Changes in intercompany debt | 0 | 7.8 | 60.2 |
Proceeds from equity contributions | ' | 0 | ' |
Payments for equity ditributions | 0 | 0 | ' |
Other, net | 0.1 | 0 | 0 |
Net cash used by financing activities | 648.8 | -57.1 | -132.1 |
Effect of exchange rate changes on cash | -0.4 | 0.5 | 0.1 |
Net Decrease in Cash and Cash Equivalents | 343.8 | 56.5 | -3.1 |
Cash and cash equivalents, beginning of year | 58.2 | 1.7 | 4.8 |
Cash and cash equivalents, end of year | 402 | 58.2 | 1.7 |
Parent Company | ' | ' | ' |
Cash Flows from Operating Activities: | ' | ' | ' |
Net cash provided by operating activities | 37.7 | -3.1 | 0 |
Cash Flows from Investing Activities: | ' | ' | ' |
Payments to Acquire Businesses, Net of Cash Acquired | -345.8 | ' | ' |
Additions to property and intangible assets | 0 | 0 | 0 |
Increase (Decrease) in Restricted Cash | -38.1 | ' | ' |
Payment for equity contributions | ' | -6 | ' |
Proceeds from equity distributions | 39.1 | 84.3 | ' |
Net cash used by investing activities | -344.8 | 78.3 | 0 |
Cash Flows from Financing Activities: | ' | ' | ' |
Proceeds from issuance of Senior Notes | 600 | 775 | ' |
Proceeds from Issuance of Secured Debt | 234 | 175 | ' |
Repayments of Related Party Debt | ' | -900 | ' |
Repayments of long-term debt | -170.6 | -4.4 | ' |
Payments of preferred stock dividend | -4.2 | ' | ' |
Purchases of treasury stock | ' | -53.4 | ' |
Change in net investment of Ralcorp | ' | 0 | 0 |
Payments of Debt Issuance Costs | -10.5 | -17.7 | ' |
Changes in intercompany debt | ' | 0 | 0 |
Proceeds from equity contributions | ' | 0 | ' |
Payments for equity ditributions | 0 | 0 | ' |
Other, net | 0.1 | ' | ' |
Net cash used by financing activities | 648.8 | -25.5 | 0 |
Effect of exchange rate changes on cash | 0 | 0 | 0 |
Net Decrease in Cash and Cash Equivalents | 341.7 | 49.7 | 0 |
Cash and cash equivalents, beginning of year | 49.7 | 0 | 0 |
Cash and cash equivalents, end of year | 391.4 | 49.7 | 0 |
Guarantors | ' | ' | ' |
Cash Flows from Operating Activities: | ' | ' | ' |
Net cash provided by operating activities | 158.3 | 201.5 | 144.6 |
Cash Flows from Investing Activities: | ' | ' | ' |
Payments to Acquire Businesses, Net of Cash Acquired | -7.1 | ' | ' |
Additions to property and intangible assets | -30.3 | -29.5 | -12.5 |
Increase (Decrease) in Restricted Cash | 0 | ' | ' |
Payment for equity contributions | ' | 0 | ' |
Proceeds from equity distributions | 0 | 0 | ' |
Net cash used by investing activities | -37.4 | -29.5 | -12.5 |
Cash Flows from Financing Activities: | ' | ' | ' |
Proceeds from issuance of Senior Notes | 0 | 0 | ' |
Proceeds from Issuance of Secured Debt | 0 | ' | ' |
Repayments of Related Party Debt | ' | 0 | ' |
Repayments of long-term debt | 0 | 0 | ' |
Payments of preferred stock dividend | 0 | ' | ' |
Purchases of treasury stock | ' | 0 | ' |
Change in net investment of Ralcorp | ' | -21.3 | -132.1 |
Payments of Debt Issuance Costs | 0 | 0 | ' |
Changes in intercompany debt | ' | 0 | ' |
Proceeds from equity contributions | ' | 0 | ' |
Payments for equity ditributions | -119 | -148.5 | ' |
Other, net | 0 | ' | ' |
Net cash used by financing activities | -119 | -169.8 | -132.1 |
Effect of exchange rate changes on cash | 0 | 0 | 0 |
Net Decrease in Cash and Cash Equivalents | 1.9 | 2.2 | 0 |
Cash and cash equivalents, beginning of year | 2.2 | 0 | 0 |
Cash and cash equivalents, end of year | 4.1 | 2.2 | 0 |
Non-Guarantors | ' | ' | ' |
Cash Flows from Operating Activities: | ' | ' | ' |
Net cash provided by operating activities | 4.8 | 9.8 | -0.8 |
Cash Flows from Investing Activities: | ' | ' | ' |
Payments to Acquire Businesses, Net of Cash Acquired | 0 | ' | ' |
Additions to property and intangible assets | -2.5 | -1.4 | -2.4 |
Increase (Decrease) in Restricted Cash | 0 | ' | ' |
Payment for equity contributions | ' | 0 | ' |
Proceeds from equity distributions | 0 | 0 | ' |
Net cash used by investing activities | -2.5 | -1.4 | -2.4 |
Cash Flows from Financing Activities: | ' | ' | ' |
Proceeds from issuance of Senior Notes | 0 | 0 | ' |
Proceeds from Issuance of Secured Debt | 0 | 0 | ' |
Repayments of Related Party Debt | ' | 0 | ' |
Repayments of long-term debt | 0 | 0 | ' |
Payments of preferred stock dividend | 0 | ' | ' |
Purchases of treasury stock | ' | 0 | ' |
Change in net investment of Ralcorp | ' | -18.1 | -60.2 |
Payments of Debt Issuance Costs | 0 | 0 | ' |
Changes in intercompany debt | ' | 7.8 | 60.2 |
Proceeds from equity contributions | ' | 6 | ' |
Payments for equity ditributions | 0 | 0 | ' |
Other, net | 0 | ' | ' |
Net cash used by financing activities | 0 | -4.3 | 0 |
Effect of exchange rate changes on cash | -0.4 | 0.5 | 0.1 |
Net Decrease in Cash and Cash Equivalents | 1.9 | 4.6 | -3.1 |
Cash and cash equivalents, beginning of year | 6.3 | 1.7 | 4.8 |
Cash and cash equivalents, end of year | 8.2 | 6.3 | 1.7 |
Eliminations | ' | ' | ' |
Cash Flows from Operating Activities: | ' | ' | ' |
Net cash provided by operating activities | -81.6 | -64.2 | 0 |
Cash Flows from Investing Activities: | ' | ' | ' |
Payments to Acquire Businesses, Net of Cash Acquired | 0 | ' | ' |
Additions to property and intangible assets | 0 | 0 | 0 |
Increase (Decrease) in Restricted Cash | 0 | ' | ' |
Payment for equity contributions | ' | 6 | ' |
Proceeds from equity distributions | -39.1 | -84.3 | ' |
Net cash used by investing activities | -39.1 | -78.3 | 0 |
Cash Flows from Financing Activities: | ' | ' | ' |
Proceeds from issuance of Senior Notes | 0 | 0 | ' |
Proceeds from Issuance of Secured Debt | 0 | 0 | ' |
Repayments of Related Party Debt | ' | 0 | ' |
Repayments of long-term debt | 0 | 0 | ' |
Payments of preferred stock dividend | 0 | ' | ' |
Purchases of treasury stock | ' | 0 | ' |
Change in net investment of Ralcorp | ' | 0 | 0 |
Payments of Debt Issuance Costs | 0 | 0 | ' |
Changes in intercompany debt | ' | 0 | 0 |
Proceeds from equity contributions | ' | -6 | ' |
Payments for equity ditributions | 119 | 148.5 | ' |
Other, net | 0 | ' | ' |
Net cash used by financing activities | 119 | 142.5 | 0 |
Effect of exchange rate changes on cash | 0 | 0 | 0 |
Net Decrease in Cash and Cash Equivalents | -1.7 | 0 | 0 |
Cash and cash equivalents, beginning of year | 0 | 0 | 0 |
Cash and cash equivalents, end of year | ($1.70) | $0 | $0 |