Post (POST) 10-Q 8 May 15 2015 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Mar. 31, 2015	4-May-15
Document and Entity Information [Abstract]
Entity Registrant Name	Post Holdings, Inc.
Entity Central Index Key	1530950
Current Fiscal Year End Date	-21
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q2
Amendment Flag	FALSE
Entity Common Stock, Shares Outstanding		54,843,957

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Operations (USD $)	3 Months Ended		6 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Income Statement [Abstract]
Net Sales	$1,052.70	$438	$2,126.60	$735
Cost of goods sold	777.2	308.6	1,602	491.1
Gross Profit	275.5	129.4	524.6	243.9
Selling, general and administrative expenses	173.7	105	339.7	186.9
Amortization of intangible assets	33.7	12.7	67.2	18.4
Loss on foreign currency	2.7	11.9	3.9	13.5
Other operating expenses, net	15.7	0.1	23.2	0.2
Operating Profit (Loss)	49.7	-0.3	90.6	24.9
Interest expense, net	59.8	37.3	119.9	66.3
Other expense, net	28.8	0	83.4	0
Loss before Income Taxes	-38.9	-37.6	-112.7	-41.4
Income tax benefit	-69.4	-19.3	-45.9	-20.7
Net Earnings (Loss)	30.5	-18.3	-66.8	-20.7
Preferred stock dividends	-4.2	-4.3	-8.5	-6.9
Net Earnings (Loss) Available to Common Shareholders	$26.30	($22.60)	($75.30)	($27.60)
Earnings (Loss) per Share, Basic (in usd per share)	$0.48	($0.67)	($1.45)	($0.83)
Earnings (Loss) per Share, Diluted (in usd per share)	$0.45	($0.67)	($1.45)	($0.83)
Weighted-Average Common Shares Outstanding, Basic (in shares)	54.5	33.6	52.1	33.1
Weighted-Average Common Shares Outstanding, Diluted (in shares)	67.6	33.6	52.1	33.1

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Income (Loss) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Net Earnings (Loss)	$30.50	($18.30)	($66.80)	($20.70)
Amortization of actuarial loss (benefit) and prior service cost for pension and postretirement benefits, net of tax benefit	0.4	-0.2	0.6	-0.3
Foreign currency translation adjustments	-26.8	0.7	-40.9	-1.5
Total Comprehensive Income (Loss)	$4.10	($17.80)	($107.10)	($22.50)

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Comprehensive Income (Loss) Parentheticals (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Pension and postretirement benefit tax adjustments	$0.20	$0.10	$0.10	$0.20

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Mar. 31, 2015	Sep. 30, 2014
In Millions, unless otherwise specified
Assets
Cash and cash equivalents	$579	$268.40
Restricted cash	13.6	84.8
Receivables, net	348.7	413.7
Inventories	461.9	380.7
Deferred income taxes	22.8	27
Prepaid expenses and other current assets	49.2	44.4
Total Current Assets	1,475.20	1,219
Property, net	827.4	831.9
Goodwill	2,943.10	2,886.70
Other intangible assets, net	2,694.20	2,643
Other assets	75.3	150.5
Total Assets	8,015.20	7,731.10
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current portion of long-term debt	24.9	25.6
Accounts payable	229.3	225
Other current liabilities	282.9	269.3
Total Current Liabilities	537.1	519.9
Long-term debt	3,815.10	3,830.50
Deferred income taxes	859.2	915.1
Other liabilities	279.9	182.4
Total Liabilities	5,491.30	5,447.90
Stockholders' Equity
Preferred stock	0.1	0.1
Common stock	0.5	0.5
Additional paid-in capital	3,017.10	2,669.30
Accumulated deficit	-372.5	-305.7
Accumulated other comprehensive loss	-67.9	-27.6
Treasury stock, at cost	-53.4	-53.4
Total Shareholders’ Equity	2,523.90	2,283.20
Total Liabilities and Shareholders’ Equity	$8,015.20	$7,731.10

Condensed_Consolidated_Stateme3

Condensed Consolidated Statements of Cash Flows (USD $)	6 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Cash Flows from Operating Activities:
Net Loss	($66.80)	($20.70)
Adjustments to reconcile of net (loss) earnings to net cash provided by operating activities:
Depreciation and amortization	126.3	51.2
Premium from issuance of long-term debt	0	20.1
Loss on interest rate swaps	83.4	0
Loss on foreign currency	2.2	6.7
Loss on assets held for sale	22.5	0
Stock-based compensation expense	16.7	7.4
Deferred income taxes	-61.5	-17.3
Other, net	0.5	-0.5
Other changes in current assets and liabilities, net of business acquisitions:
Decrease (increase) in receivables, net	77.7	-34.6
(Increase) decrease in inventories	-49.5	10
Increase in prepaid expenses and other current assets	-6.4	-12.9
Increase in accounts payable and other current and non-current liabilities	13.3	9.1
Net Cash Provided by Operating Activities	158.4	18.5
Cash Flows from Investing Activities:
Business acquisitions, net of cash acquired	-187.9	-1,035.20
Cash advance for asset purchase	0	-25
Additions to property	-45.6	-26.7
Restricted cash	71.1	36.3
Insurance proceeds on property losses	1.8	0
Net Cash Used by Investing Activities	-160.6	-1,050.60
Payments of Stock Issuance Costs	13.7
Cash Flows from Financing Activities:
Proceeds from issuance of long term debt	0	875
Proceeds from issuance of preferred stock, net of issuance costs	0	310.2
Proceeds from issuance of common stock, net of issuance costs	341.4	303.5
Repayments of long-term debt	-13.2	0
Payment of preferred stock dividend	-8.5	-5.9
Payments of Debt Issuance Costs	3.7	19.8
Other, net	-1.7	0.2
Net Cash Provided by Financing Activities	314.3	1,463.20
Effect of Exchange Rate Changes on Cash	-1.5	-7.2
Net Increase in Cash and Cash Equivalents	310.6	423.9
Cash and Cash Equivalents, Beginning of Year	268.4	402
Cash and Cash Equivalents, End of Period	$579	$825.90

Basis_of_Presentation

Basis of Presentation	6 Months Ended
	Mar. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Background	BASIS OF PRESENTATION
	These unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States (“GAAP”), under the rules and regulations of the United States Securities and Exchange Commission (the “SEC”), and on a basis substantially consistent with the audited consolidated financial statements of the Company as of and for the fiscal year ended September 30, 2014. These unaudited condensed consolidated financial statements should be read in conjunction with such audited consolidated financial statements, which are included in the Company’s Annual Report on Form 10-K filed with the SEC on November 28, 2014.
	These unaudited condensed consolidated financial statements include all adjustments (consisting of normal recurring adjustments and accruals) that management considers necessary for a fair statement of the Company’s financial position, results of operations, comprehensive income (loss) and cash flows for the interim periods presented. Interim results are not necessarily indicative of the results for any other interim period or for the entire fiscal year. Certain prior year amounts have been reclassified to conform with the 2015 presentation.
	Related to the closure of its Modesto, California facility and the planned sale of a peanut butter manufacturing facility located in Portales, New Mexico, the Company has land, building and equipment classified as assets held for sale as of March 31, 2015. Losses of $15.4 and $22.5 were recorded in the three and six months ended March 31, 2015, respectively, to adjust the carrying value of the assets to their estimated fair value less estimated selling costs. The loss is included in “Other operating expenses, net” on the Condensed Consolidated Statement of Operations. At March 31, 2015 and September 30, 2014, the carrying value of the assets held for sale was  $13.9 and $16.4, respectively, and included in “Prepaid expenses and other current assets” on the Condensed Consolidated Balance Sheets.
	Unless otherwise stated or the context otherwise indicates, all references in this Form 10-Q to “Post,” “the Company,” “us,” “our” or “we” mean Post Holdings, Inc. and its consolidated subsidiaries.
	Recently Issued Accounting Standards
	In April 2015, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2015-03 “Simplifying the Presentation of Debt Issuance Costs”, which changes the presentation of debt issuance costs in financial statements. The standards update requires an entity to present debt issuance costs in the balance sheet as a direct deduction from the related debt liability rather than as an asset and amortization of the costs is reported as interest expense. The ASU requires retrospective application and is effective for financial statements issued for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years, with early adoption permitted. The implementation of this standard is not expected to have a significant impact on the Company’s consolidated financial statements.
	In May 2014, the FASB issued ASU 2014-09, "Revenue from Contracts with Customers (Topic 606)," which is the new comprehensive revenue recognition standard that will supersede all existing revenue recognition guidance under GAAP. The standard's core principle is that a company will recognize revenue when it transfers promised goods or services to a customer in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. This ASU is effective for annual and interim periods beginning on or after December 15, 2016, and early adoption is not permitted. Although the Company currently expects to adopt this standard update in the financial statements for the year ending September 30, 2018, the Financial Accounting Standards Board, in April 2015, voted to issue a proposal which would defer the adoption of this standard update one year, Post’s year ending September 30, 2019. Entities will have the option of using either a full retrospective approach or a modified approach to adopt the guidance in the ASU. The Company is currently in the process of determining the method of adoption and evaluating the impact of adopting this guidance.

Restructuring

Restructuring	6 Months Ended
	Mar. 31, 2015
Restructuring and Related Activities [Abstract]
Restructuring	RESTRUCTURING
	In March 2015, the Company announced its plan to close its facility in Boise, Idaho, which manufactures certain PowerBar products distributed in North America. The closure of the plant is expected to be completed by July 2015. Post management expects to transfer production of the PowerBar products to third party facilities under co-manufacturing agreements.
	In April 2013, the Company announced management’s decision to close its plant located in Modesto, California as part of a cost savings and capacity rationalization effort. The transfer of production capabilities and closure of the plant was completed during September 2014, and no additional costs were incurred in the six months ended March 31, 2015.
	Restructuring amounts related to the plant closures are shown in the following table. Costs are recognized in “Selling, general and administrative expenses” in the consolidated statements of operations with the exception of accelerated depreciation expense which is included in “Cost of goods sold.” These expenses are not included in the measure of segment performance for any segment (see Note 15).
		Three Months Ended March 31,				Six Months Ended March 31,					Cumulative Incurred to Date		Total Expected to be Incurred
		2015		2014		2015			2014
	Boise:
	Employee severance	$	3.1	$	—	$	3.1		$	—	$	3.1	$	3.1
	Modesto:
	Employee severance	—		0.2		—			0.7		3.2		3.2
	Pension curtailment	—		—		—			—		1.7		1.7
	Accelerated depreciation	—		2		—			4.7		17.6		17.6
	Total Modesto	—		2.2		—			5.4		22.5		22.5
		$	3.1	$	2.2	$	3.1		$	5.4	$	25.6	$	25.6
	Liabilities recorded related to restructuring activities and changes therein are as follows:
		30-Sep-14		Costs Incurred and Charged to Expense		Costs Paid			31-Mar-15
	Employee severance:
	Boise	$	—	$	3.1	$	—		$	3.1
	Modesto	0.7		—		(0.5		)	0.2
		$	0.7	$	3.1	$	(0.5	)	$	3.3

Business_Combinations

Business Combinations	6 Months Ended
	Mar. 31, 2015
Business Combinations [Abstract]
Business Combinations	BUSINESS COMBINATIONS
	On January 1, 2014, Post completed its acquisition of all the stock of Agricore United Holdings Inc. (“Agricore”) from Viterra Inc. Agricore is the parent company of Dakota Growers Pasta Company, Inc. (“Dakota Growers”), a manufacturer of dry pasta for the private label, foodservice and ingredient markets. Dakota Growers is reported in Post’s Michael Foods Group segment (see Note 15). Net sales and operating profit included in the condensed consolidated statements of operations related to this acquisition were $68.2 and $8.5, respectively, for the three months ended March 31, 2015 and $133.4 and $13.0, respectively, for the six months ended March 31, 2015. In fiscal 2014, net sales and operating loss included in the condensed consolidated statements of operations related to this acquisition were $66.7 and $(1.2), respectively, for both the three and six months ended March 31, 2014.
	On February 1, 2014, Post completed its acquisition of Dymatize Enterprises, LLC (“Dymatize”), a manufacturer and marketer of premium protein powders, bars and nutritional supplements. In accordance with the terms of the purchase agreement, the sellers were eligible for an earn-out payment of up to $17.5 based on Dymatize’s level of performance against certain financial performance targets, as defined in the purchase agreement, during calendar year 2014. As of December 31, 2014, the Company updated its estimate of the fair value of the earn-out and concluded the fair value was zero, resulting in a gain of approximately $0.7 recognized in the first quarter of fiscal 2015, which was recorded as a component of selling, general and administrative expenses in the Condensed Consolidated Statement of Operations. The final net working capital adjustment has not been finalized. The Company currently estimates the final net working capital adjustment will result in an amount due back to the Company. Dymatize is reported in Post’s Consumer Brands segment (see Note 15). Net sales and operating loss included in the condensed consolidated statements of operations were $48.1 and $(5.1), respectively, for the three months ended March 31, 2015 and $95.1 and $(9.6), respectively, for the six months ended March 31, 2015. In fiscal 2014, net sales and operating loss included in the condensed consolidated statements of operations related to this acquisition were $28.2 and $(2.5), respectively, for both the three and six months ended March 31, 2014.
	On February 1, 2014, Post completed its acquisition of Golden Boy Foods Ltd. (“Golden Boy”), a manufacturer of private label peanut and other nut butters, as well as dried fruits and baking and snacking nuts. Golden Boy is reported in Post’s Private Label segment (see Note 15). Net sales and operating loss included in the condensed consolidated statements of operations related to this acquisition were $98.0 and $(8.0), respectively, for the three months ended March 31, 2015 and $200.5 and $(4.0), respectively, for the six months ended March 31, 2015. The operating loss included $15.4 related to a loss on assets held for sale for both the three and six months ended March 31, 2015 (see Note 1). For fiscal 2014, net sales and operating profit included in the condensed consolidated statements of operations related to this acquisition were $39.0 and $2.0, respectively, for both the three and six months ended March 31, 2014. Net sales and operating profit amounts for fiscal 2015 are inclusive of American Blanching Company (“ABC”), which is discussed further below.
	On June 2, 2014, the Company completed its acquisition of MFI Holding Corporation (“Michael Foods”), which is reported in Post’s Michael Foods Group segment (see Note 15). Michael Foods manufactures and distributes egg products, refrigerated potato products and also distributes cheese and other dairy case products to the retail, food service and food ingredient channels. Net sales and operating profit included in the condensed consolidated statements of operations related to this acquisition were $482.1 and $31.3, respectively, for the three months ended March 31, 2015 and $1,016.2 and $68.9, respectively, for the six months ended March 31, 2015.
	On August 1, 2014, Post Foods, LLC, a subsidiary of the Company, acquired a cereal brand and related inventory for $20.4. The brand is reported as part of the Consumer Brands segment.
	On October 1, 2014, the Company completed its acquisition of the PowerBar and Musashi brands and related worldwide assets from Nestlé S.A (“PowerBar”) for $150.0, subject to a working capital adjustment, which resulted in a payment at closing of $136.1. In March 2015, a final settlement of net working capital and other adjustments was reached, resulting in an amount back to the Company of approximately $1.7. PowerBar is reported in Post’s Consumer Brands segment (see Note 15). Based upon the preliminary purchase price allocation, the Company has recorded $21.3 of customer relationships to be amortized over a weighted-average period of 18.3 years and $40.0 to trademarks and brands to be amortized over a weighted-average period of 20 years. Net sales and operating loss included in the condensed consolidated statements of operations related to this acquisition were $31.2 and $(8.0), respectively, for the three months ended March 31, 2015 and $66.2 and $(12.5), respectively, for the six months ended March 31, 2015. The operating loss included $3.5 related to restructuring and plant closure costs for both the three and six months ended March 31, 2015.
	On November 1, 2014, the Company completed its acquisition of ABC for $128.0. ABC is a manufacturer of peanut butter for national brands, private label retail and industrial markets and provider of peanut blanching, granulation and roasting services for the commercial peanut industry. ABC is reported in Post’s Private Label segment (see Note 15). Based upon the preliminary purchase price allocation, the Company has recorded $63.9 of customer relationships to be amortized over a weighted-average period of 17 years and $8.0 to trademarks and brands to be amortized over a weighted-average period of 10 years. ABC operations have been integrated into the Golden Boy business, and due to the level of integration, discrete sales and operating profit data is not available for ABC.
	Each of the acquisitions was accounted for using the acquisition method of accounting, whereby the results of operations are included in the financial statements from the date of acquisition. The respective purchase prices were allocated to acquired assets and assumed liabilities based on their estimated fair values at the date of acquisition, and any excess was allocated to goodwill, as shown in the table below. Goodwill represents the value the Company expects to achieve through the implementation of operational synergies and the expansion of the business into new or growing segments of the industry. The Company expects substantially all of the final fair value of goodwill related to the current year acquisition of PowerBar to be deductible for U.S. income tax purposes and does not expect the final fair value of goodwill related to the current year acquisition of ABC to be deductible for U.S. income tax purposes.
	Certain estimated values for the Michael Foods, PowerBar and ABC acquisitions, including goodwill, intangible assets, inventory and deferred taxes, are not yet finalized pending the final purchase price allocations and are subject to change once additional information is obtained. As of March 31, 2015, the final working capital adjustment for the Dymatize acquisition was not final, as such, the Company has estimated the working capital adjustment and any subsequent adjustments will be recorded as an adjustment to earnings.
	The following table provides the allocation of the purchase price based upon the fair value of assets and liabilities assumed for each acquisition completed in fiscal 2015.
		PowerBar			ABC
	Cash and cash equivalents	$	2.4		$	0.6
	Receivables	6.5			12.8
	Inventories	23.1			15.5
	Prepaid expenses and other current assets	0.1			0.4
	Property	17.3			19.7
	Goodwill	19.7			49.6
	Other intangible assets	61.3			71.9
	Deferred tax asset - long-term	11.7			—
	Other assets	—			0.4
	Accounts payable	(1.2		)	(9.0		)
	Deferred tax liability - current	(0.8		)	(0.4		)
	Other current liabilities	(4.6		)	(2.8		)
	Deferred tax liability - long-term	(1.1		)	(30.7		)
	Total acquisition cost	$	134.4		$	128
	The following table summarizes the provisional amounts recognized related to fiscal 2014 acquisitions as of September 30, 2014, as well as measurement period adjustments made in the six months ended March 31, 2015. The adjustments did not have a significant impact on the consolidated statements of income, balance sheets or cash flows in any period; therefore, the financial statements have not been retrospectively adjusted.
		Acquisition Date Amounts Recognized as of September 30, 2014 (a)			Adjustments During the Six Months Ended March 31, 2015			Acquisition Date Amounts Recognized (as Adjusted)
	Cash and cash equivalents	$	73.8		$	—		$	73.8
	Restricted cash	3.4			—			3.4
	Receivables (b) (d)	219.6			(0.3		)	219.3
	Income tax receivable	62.5			—			62.5
	Inventories	289.9			—			289.9
	Deferred tax asset - current (b)	5.4			0.7			6.1
	Prepaid expenses and other current assets	9.3			—			9.3
	Property	440.5			—			440.5
	Goodwill	1,605.40			5.2			1,610.60
	Other intangible assets	1,883.70			—			1,883.70
	Other assets	9.1			—			9.1
	Current portion of long-term debt	(3.7		)	—			(3.7		)
	Accounts payable (d)	(142.6		)	0.2			(142.4		)
	Other current liabilities (d)	(121.5		)	(0.3		)	(121.8		)
	Long-term debt	(8.4		)	—			(8.4		)
	Deferred tax liability - long-term (b)	(697.1		)	7			(690.1		)
	Other liabilities (b)	(11.8		)	(9.0		)	(20.8		)
	Total acquisition cost (c)	$	3,617.50		$	3.5		$	3,621.00
	Adjustments During the Six Months Ended March 31, 2015:
	(a) As previously reported in Post’s 2014 Annual Report on Form 10-K.
	(b) The adjustments to “Deferred income taxes” and “Other liabilities” reflect: 1) the impact on deferred tax assets and related reserves for uncertain tax positions of certain state tax elections made on final pre-acquisition short period tax returns and 2) the impact of certain return to provision adjustments
	(c) Dymatize working capital adjustment
	(d) Other Dymatize adjustments
	The following unaudited pro forma information presents a summary of the results of operations of the Company combined with the aggregate results of Dakota Growers, Dymatize, Golden Boy, Michael Foods, PowerBar and ABC for the periods presented as if the fiscal 2015 acquisitions had occurred on October 1, 2013 and the fiscal 2014 acquisitions had occurred on October 1, 2012, along with certain pro forma adjustments. These pro forma adjustments give effect to the amortization of certain definite-lived intangible assets, adjusted depreciation based upon fair value of assets acquired, interest expense related to the financing of the business combinations, and related income taxes. The following unaudited pro forma information has been prepared for comparative purposes only and is not necessarily indicative of the results of operations as they would have been had the acquisitions occurred on the assumed dates, nor is it necessarily an indication of future operating results.
		Three Months Ended March 31,						Six Months Ended March 31,
		2015			2014			2015			2014
	Pro forma net sales	$	1,052.70		$	1,014.60		$	2,139.10		$	2,082.40
	Pro forma net income (loss) available to common shareholders	26.4			(23.9		)	(70.5		)	(28.5		)
	Pro forma basic income (loss) per share	$	0.48		$	(0.71	)	$	(1.35	)	$	(0.86	)
	Pro forma diluted income (loss) per share	$	0.45		$	(0.71	)	$	(1.35	)	$	(0.86	)

Goodwill

Goodwill	6 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	GOODWILL
	The changes in the carrying amount of goodwill by segment are noted in the following table.
		Consumer Brands			Michael Foods Group			Private Label			Total
	Balance, September 30, 2014
	Goodwill (gross)	$	1,950.60		$	1,347.20		$	229.3		$	3,527.10
	Accumulated impairment losses	(640.4		)	—			—			(640.4		)
	Goodwill (net)	$	1,310.20		$	1,347.20		$	229.3		$	2,886.70
	Goodwill acquired	19.7			—			49.6			69.3
	Acquisition related adjustment	10.8			(5.6		)	—			5.2
	Currency translation adjustment	(0.7		)	—			(17.4		)	(18.1		)
	Balance, March 31, 2015
	Goodwill (gross)	$	1,980.40		$	1,341.60		$	261.5		$	3,583.50
	Accumulated impairment losses	(640.4		)	—			—			(640.4		)
	Goodwill (net)	$	1,340.00		$	1,341.60		$	261.5		$	2,943.10

Income_Taxes

Income Taxes	6 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES
	For the three months and six months ended March 31, 2015, the effective income tax rate is 178.4% and 40.7%, respectively. In accordance with Accounting Standards Codification (“ASC”) Topic 740, the Company has recorded tax expense for the three and six months ended March 31, 2015 using the estimated annual effective tax rate for the Company’s full fiscal year. Under ASC 740-270-30-30, the Company’s tax benefit recognized for the year-to-date loss is limited to the amount that would be recognized if the year-to-date ordinary loss were the anticipated ordinary loss for the fiscal year. The estimated annual effective tax rate differs from the statutory tax rate primarily due to the expectation that nondeductible merger and acquisition expenses and other permanently nondeductible expenses will have an unfavorable impact on the effective income tax rate and the expectation that the Domestic Production Activities Deduction under the Internal Revenue Code and tax planning strategies implemented for certain recent acquisitions will have a favorable impact on the effective income tax rate.

Intangible_Assets_net

Intangible Assets, net	6 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets, net	INTANGIBLE ASSETS, NET
	Total intangible assets are as follows:
		31-Mar-15							30-Sep-14
		Carrying		Accumulated Amortization			Net		Carrying		Accumulated Amortization			Net
		Amount					Amount		Amount					Amount
	Subject to amortization:
	Customer relationships	$	1,818.70	$	(139.8	)	$	1,678.90	$	1,743.70	$	(90.9	)	$	1,652.80
	Trademarks/brands	607.5		(59.7		)	547.8		554.7		(43.9		)	510.8
	Other intangible assets	22.3		(4.3		)	18		24.7		(3.0		)	21.7
		2,448.50		(203.8		)	2,244.70		2,323.10		(137.8		)	2,185.30
	Not subject to amortization:
	Trademarks/brands	449.5		—			449.5		457.7		—			457.7
		$	2,898.00	$	(203.8	)	$	2,694.20	$	2,780.80	$	(137.8	)	$	2,643.00

Earnings_Loss_Per_Share

Earnings (Loss) Per Share	6 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Earnings (Loss) per Share
	EARNINGS (LOSS) PER SHARE
	Basic earnings (loss) per share is based on the average number of common shares outstanding during the period. Diluted earnings (loss) per share is based on the average number of shares used for the basic earnings per share calculation, adjusted for the dilutive effect of stock options, stock appreciation rights and restricted stock equivalents using the “treasury stock” method. The impact of potentially dilutive convertible preferred stock is calculated using the “if-converted” method. The Company’s tangible equity units (“TEUs”) are assumed to be settled at the minimum settlement amount of 1.7114 shares per TEU for weighted-average shares for basic earnings (loss) per share. For diluted earnings (loss) per share, the shares, to the extent dilutive, are assumed to be settled at a conversion factor based on the Company’s daily volume-weighted average price per share of the Company’s common stock not to exceed 2.0964 shares per TEU.
	The following table sets forth the computation of basic and diluted earnings (loss) per share for the three and six months ended March 31, 2015 and 2014, respectively.
		Three Months Ended March 31,					Six Months Ended March 31,
		2015		2014			2015			2014
	Net earnings for basic earnings (loss) per share	$	26.3	$	(22.6	)	$	(75.3	)	$	(27.6	)
	Net earnings for diluted earnings (loss) per share	$	30.5	$	(22.6	)	$	(75.3	)	$	(27.6	)
	Weighted-average shares outstanding	49.6		33.6			47.2			33.1
	Effect of TEUs on weighted-average shares for basic earnings (loss) per share	4.9		—			4.9			—
	Weighted-average shares for basic earnings (loss) per share	54.5		33.6			52.1			33.1
	Effect of dilutive securities:
	Stock options	0.6		—			—			—
	Stock appreciation rights	0.1		—			—			—
	Restricted stock awards	0.3		—			—			—
	TEUs	1.1		—			—			—
	Preferred shares conversion to common	11		—			—			—
	Total dilutive securities	13.1		—			—			—
	Weighted-average shares for diluted earnings (loss) per share	67.6		33.6			52.1			33.1
	Basic earnings (loss) per common share	$	0.48	$	(0.67	)	$	(1.45	)	$	(0.83	)
	Diluted earnings (loss) per common share	$	0.45	$	(0.67	)	$	(1.45	)	$	(0.83	)
	For the three months ended March 31, 2015 and 2014, weighted-average shares for diluted earnings (loss) per common share excludes 1.4 million and 3.8 million equity awards, respectively, as they were anti-dilutive. For the six months ended March 31, 2015 and 2014, weighted-average shares for diluted earnings (loss) per common share excludes 5.4 million and 3.8 million equity awards, respectively, as they were anti-dilutive. For the three months ended March 31, 2014, the weighted-average shares for diluted earnings (loss) per common share excludes 11.0 million shares, related to the potential conversion of the Company’s convertible preferred stock as they were anti-dilutive. For the six months ended March 31, 2015 and 2014, the weighted-average shares for diluted earnings (loss) per common share excludes 11.0 million shares in both years, related to the potential conversion of the Company’s convertible preferred stock as they were anti-dilutive. For the six months ended March 31, 2015, there were 1.1 million tangible equity units excluded from diluted earnings (loss) per share as they were anti-dilutive.

Inventories

Inventories	6 Months Ended
	Mar. 31, 2015
Inventory [Abstract]
Inventories	INVENTORIES
		31-Mar-15		30-Sep-14
	Raw materials and supplies	$	130.5	$	99.2
	Work in process	14.3		16.3
	Finished products	288.8		235.8
	Flocks	28.3		29.4
		$	461.9	$	380.7

Property_net

Property, net	6 Months Ended
	Mar. 31, 2015
Property, Plant and Equipment [Abstract]
Property, net	PROPERTY, NET
		31-Mar-15			30-Sep-14
	Property, at cost	$	1,170.80		$	1,121.00
	Accumulated depreciation	(343.4		)	(289.1		)
		$	827.4		$	831.9

Derivative_Financial_Instrumen

Derivative Financial Instruments and Hedging	6 Months Ended
	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative financial instruments and hedging	DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING
	In the ordinary course of business, the Company is exposed to commodity price risks relating to the acquisition of raw materials and supplies, interest rate risks relating to floating rate debt, and foreign currency exchange rate risks relating to its foreign subsidiaries. The Company utilizes derivative financial instruments, including (but not limited to) futures contracts, option contracts, forward contracts and swaps, to manage certain of these exposures by hedging when it is practical to do so. The Company does not hold or issue financial instruments for speculative or trading purposes.
	The Company maintains options, futures contracts and interest rate swaps which have been designated as economic hedges of raw materials, fuel and energy purchases and variable rate debt.
	As of March 31, 2015, the Company has interest rate swaps with a notional amount of $869.5 that have the effect of converting our variable interest rate term loan debt to fixed interest rates beginning in June 2016. In addition, as of March 31, 2015, the Company has interest rate swaps with a $750.0 notional amount that obligate Post to pay a weighted average fixed rate of approximately 4% and receive three-month LIBOR and will result in a net settlement in July 2018. These swaps have the effect of fixing the variable interest rate on the term loan which the Company entered into to fund the acquisition of MOM Brands (see Notes 13 and 17). In connection with the acquisition of Michael Foods, the Company acquired additional interest rate swaps with notional amounts totaling $300.0 that were not settled at the closing of the acquisition and remain outstanding at March 31, 2015. The notional amounts of natural gas and heating oil futures and commodity contracts were $32.0 and $43.1, respectively, at March 31, 2015. These contracts relate to inputs that generally will be utilized within the next 12 months.
	The Company’s calculation of the fair value of interest rate swaps is derived from a discounted cash flow analysis based on the terms of the contract and the interest rate curve. Commodity, natural gas and heating oil derivatives are valued using an income approach based on index prices less the contract rate multiplied by the notional amount.
	The following tables present the balance sheet location and fair value of the Company’s derivative instruments on a gross and net basis as of March 31, 2015 and September 30, 2014.
			Fair Value of Assets as of March 31, 2015
		Balance Sheet Location	Gross Amounts of Recognized Assets			Gross Amounts Offset in the Condensed Consolidated Balance Sheet			Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheet
	Commodity contracts	Prepaid expenses and other current assets	$	0.2		$	(0.1	)	$	0.1
	Natural gas and heating oil futures	Prepaid expenses and other current assets	0.2			—			0.2
			$	0.4		$	(0.1	)	$	0.3
			Fair Value of Liabilities as of March 31, 2015
		Balance Sheet Location	Gross Amounts of Recognized Liabilities			Gross Amounts Offset in the Condensed Consolidated Balance Sheet			Net Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheet
	Commodity contracts	Other current liabilities	$	1.3		$	(0.1	)	$	1.2
	Natural gas and heating oil futures	Other current liabilities	6.9			—			6.9
	Interest rate swaps	Other current liabilities	0.8			—			0.8
	Interest rate swaps	Other liabilities	123.8			—			123.8
			$	132.8		$	(0.1	)	$	132.7
			Fair Value of Liabilities as of September 30, 2014
		Balance Sheet Location	Gross Amounts of Recognized Liabilities			Gross Amounts Offset in the Condensed Consolidated Balance Sheet			Net Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheet
	Commodity contracts	Other current liabilities	$	8		$	—		$	8
	Natural gas and heating oil futures	Other current liabilities	0.9			—			0.9
	Interest rate swaps	Other current liabilities	2.7			—			2.7
	Interest rate swaps	Other liabilities	40.4			—			40.4
			$	52		$	—		$	52
	The following table presents the gain (loss) from derivative instruments that were not designated as hedging instruments and were recorded on the Company’s condensed consolidated statements of operations.
			Gain (Loss) Recognized in Earnings
			Three Months Ended March 31,						Six Months Ended March 31,
	Derivative Instrument	Location of Gain (Loss) Recognized in Earnings	2015			2014			2015			2014
	Commodity contracts	Cost of goods sold	$	0.2		$	0.8		$	8.4		$	1
	Natural gas and heating oil futures	Cost of goods sold	4.9			(0.2		)	(3.6		)	0.5
	Foreign exchange contracts	Selling, general and administrative expenses	—			(5.6		)	—			(6.3		)
	Interest rate swaps	Other expense, net	(28.8		)	—			(83.4		)	—

Fair_Value_Measurements

Fair Value Measurements	6 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair value measurements	FAIR VALUE MEASUREMENTS
	The following table represents Post’s assets and liabilities measured at fair value on a recurring basis and the basis for that measurement according to the levels in the fair value hierarchy in ASC Topic 820:
		31-Mar-15						30-Sep-14
		Total		Level 1		Level 2		Total		Level 1		Level 2
	Assets:
	Deferred compensation investment	$	11.3	$	11.3	$	—	$	10.2	$	10.2	$	—
	Derivative assets	0.3		—		0.3		—		—		—
		$	11.6	$	11.3	$	0.3	$	10.2	$	10.2	$	—
	Liabilities:
	Deferred compensation liabilities	$	15.8	$	—	$	15.8	$	12.3	$	—	$	12.3
	Derivative liabilities	132.7		—		132.7		52		—		52
		$	148.5	$	—	$	148.5	$	64.3	$	—	$	64.3
	The following table represents the fair value of Post’s long-term debt, which is not recorded at fair value in the Condensed Consolidated Balance Sheets, and is classified as Level 2 in the fair value hierarchy per ASC Topic 820:
		31-Mar-15		30-Sep-14
	Senior notes	$	2,914.80	$	2,768.20
	Term loan	880.2		872.9
	TEUs	30.3		29.5
		$	3,825.30	$	3,670.60
	The fair value hierarchy is based on inputs to valuation techniques that are used to measure fair value that are either observable or unobservable. Observable inputs reflect assumptions market participants would use in pricing an asset or liability based on market data obtained from independent sources, while unobservable inputs reflect a reporting entity’s pricing based upon its own market assumptions. The fair value hierarchy consists of three levels:
	Level 1 — Inputs are quoted prices in active markets for identical assets or liabilities.
	Level 2 — Inputs are quoted prices of similar assets or liabilities in an active market, quoted prices for identical or similar assets or liabilities in markets that are not active, inputs other than quoted prices that are observable and market-corroborated inputs which are derived principally from or corroborated by observable market data.
	Level 3 — Inputs are derived from valuation techniques in which one or more significant inputs or value drivers are unobservable.
	The deferred compensation investment is invested primarily in mutual funds and its fair value is measured using the market approach. This investment is in the same funds and purchased in substantially the same amounts as the participants’ selected investment options (excluding Post common stock equivalents), which represent the underlying liabilities to participants in the Company’s deferred compensation plans. Deferred compensation liabilities are recorded at amounts due to participants in cash, based on the fair value of participants’ selected investment options (excluding certain Post common stock equivalents to be distributed in shares) using the market approach. The Company utilizes the income approach to measure fair value for its derivative assets, which include commodity options and futures contracts. The income approach uses pricing models that rely on market observable inputs such as yield curves and forward prices. Changes in the deferred compensation investment and related liability are recorded as a component of selling, general and administrative expenses.
	Refer to Note 10 for the classification of changes in fair value of derivative assets and liabilities measured at fair value on a recurring basis within the Condensed Consolidated Statements of Operations.
	The carrying amounts reported on the Condensed Consolidated Balance Sheets for cash and cash equivalents, receivables and accounts payable approximate fair value because of the short maturities of these financial instruments.

Shareholders_Equity

Shareholders' Equity	6 Months Ended
	Mar. 31, 2015
Stockholders' Equity Note [Abstract]
Shareholders' equity	SHAREHOLDERS’ EQUITY
	In February 2015, the Company issued 7.475 million shares of common stock, par value $0.01 per share, at a price to the public of $47.50 per share. The Company received net proceeds of $341.4 after paying offering related fees and expenses of approximately $13.7.
	Reclassifications out of accumulated other comprehensive income for the reported periods includes the amortization of actuarial loss (benefit) and prior service cost for pension and postretirement benefits totaling $0.3 and $(0.3) for the three month periods ended March 31, 2015 and 2014, respectively, and $0.5 and $(0.5) for the six month periods ended March 31, 2015 and 2014, respectively. Amounts are primarily classified as “Cost of goods sold” on the condensed consolidated statements of operations.

LongTerm_Debt

Long-Term Debt	6 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Long-Term Debt	LONG-TERM DEBT
	Long-term debt as of the dates indicated consists of the following:
		31-Mar-15			September 30, 2014
	7.375% Senior Notes maturing February 2022	$	1,375.00		$	1,375.00
	6.75% Senior Notes maturing December 2021	875			875
	6.00% Senior Notes maturing December 2022	630			630
	Term loan	878.4			882.8
	TEUs	31.8			38.4
	4.57% 2012 Series Bond maturing September 2017	3.9			4.8
	Secured notes	—			1.1
	Capital leases	3.1			3.8
		$	3,797.20		$	3,810.90
	Less: Current portion	(24.9		)	(25.6		)
	Plus: Unamortized premium (discount), net	42.8			45.2
	Total long-term debt	$	3,815.10		$	3,830.50
	On January 29, 2014, the Company entered into a Credit Agreement (the “Credit Agreement”). The Credit Agreement provides for a revolving credit facility with an aggregate principal value of $400.0. The revolving credit facility has outstanding letters of credit of $0.5 which reduced the available borrowing capacity to $399.5 at March 31, 2015. On May 1, 2014, the Company entered into a First Amendment to the Credit Agreement (the “First Amendment”). The First Amendment amended the Credit Agreement to, among other matters, permit an incremental term loan (the “Existing Term Loan”) of $885.0.
	On March 6, 2015, the Company entered into a Second Amendment to Credit Agreement (the “Second Amendment”). The Second Amendment amended the Credit Agreement to, among other matters, facilitate the financing of the Company’s previously announced acquisition of MOM Brands Company (“MOM Brands”), including by permitting a new incremental term loan (the “New Term Loan”) under the Credit Agreement of up to $700.0 to finance a portion of the cash portion of the purchase price of MOM Brands and waiving or limiting certain conditions for the acquisition of MOM Brands to be a permitted acquisition under the Credit Agreement. In addition, with respect to the New Term Loan, the Second Amendment waives the condition that the Company be in pro forma compliance with the financial covenants contained in the Credit Agreement. The Company incurred $3.7 of issuance costs in connection with the Credit Agreement and the New Term Loan as of March 31, 2015. (see Note 17).
	The Credit Agreement, as amended, contains customary affirmative and negative covenants for agreements of this type, including delivery of financial and other information, compliance with laws, maintenance of property, existence, insurance and books and records, inspection rights, obligation to provide collateral and guarantees by new subsidiaries, limitations with respect to indebtedness, liens, fundamental changes, restrictive agreements, use of proceeds, amendments of organization documents, accounting changes, prepayments and amendments of indebtedness, dispositions of assets, acquisitions and other investments, transactions with affiliates, dividends and redemptions or repurchases of stock, capital expenditures, and granting liens on certain real property, and customary financial covenants including (a) a quarterly maximum senior secured leverage ratio of 3.00 to 1.00, and (b) a quarterly minimum interest coverage ratio of 1.75 to 1.00. Also, the Credit Agreement permits the Company to incur additional unsecured debt only if its consolidated interest coverage ratio, calculated as provided in the Credit Agreement would be greater than 2.00 to 1.00 after giving effect to such new debt.
	The Credit Agreement provides for customary events of default, including material breach of representations and warranties, failure to make required payments, failure to comply with certain agreements or covenants, failure to pay, or default under, certain other material indebtedness, certain events of bankruptcy and insolvency, inability to pay debts, the occurrence of one or more unstayed or undischarged judgments in excess of $60.0, which subsequently will increase to $75.0 in connection with the closing of the MOM Brands acquisition (see Note 17), or attachments issued against a material part of the Company’s property, change in control, the invalidity of any loan document, the failure of the collateral documents to create a valid and perfected first priority lien and certain ERISA events. Upon the occurrence of an event of default, the maturity of the loans under the Credit Agreement may be accelerated and the agent and lenders under the Credit Agreement may exercise other rights and remedies available at law or under the loan documents, including with respect to the collateral and guarantees for the Company’s obligations under the Credit Agreement.
	Debt Covenants
	Under the terms of the Credit Agreement, the Company is required to comply with certain financial covenants consisting of ratios for quarterly maximum senior secured leverage and minimum interest coverage. As of March 31, 2015, the Company was in compliance with such financial covenants. The Company does not believe non-compliance is reasonably likely in the foreseeable future.

Pension_and_Other_Postretireme

Pension and Other Postretirement Benefits	6 Months Ended
	Mar. 31, 2015
Pension and Other Postretirement Benefit Expense [Abstract]
Pension and other postretirement benefits	PENSION AND OTHER POSTRETIREMENT BENEFITS
	Certain of the Company’s employees are eligible to participate in the Company’s qualified and supplemental noncontributory defined benefit pension plans and other postretirement benefit plans (partially subsidized retiree health and life insurance) or separate plans for Post Foods Canada Inc. Amounts for the Canadian plans are included in these disclosures and are not disclosed separately because they do not constitute a significant portion of the combined amounts.
	The following tables provide the components of net periodic benefit cost for the plans.
		Pension Benefits
		Three Months Ended March 31,						Six Months Ended March 31,
		2015			2014			2015			2014
	Components of net periodic benefit cost
	Service cost	$	0.9		$	0.9		$	1.9		$	1.8
	Interest cost	0.5			0.6			1.1			1.1
	Expected return on plan assets	(0.5		)	(0.6		)	(1.2		)	(1.1		)
	Recognized net actuarial loss	0.2			0.2			0.4			0.4
	Recognized prior service cost	0.1			0.1			0.2			0.2
	Net periodic benefit cost	$	1.2		$	1.2		$	2.4		$	2.4
		Other Benefits
		Three Months Ended March 31,						Six Months Ended March 31,
		2015			2014			2015			2014
	Components of net periodic benefit cost
	Service cost	$	0.5		$	0.5		$	1		$	1
	Interest cost	1.2			1.2			2.4			2.3
	Recognized net actuarial loss	0.3			0.1			0.7			0.2
	Recognized prior service credit	(0.4		)	(0.6		)	(0.8		)	(1.2		)
	Net periodic benefit cost	$	1.6		$	1.2		$	3.3		$	2.3

Segments

Segments	6 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Segment Reporting Disclosure [Text Block]	SEGMENTS
	Effective October 1, 2014, the Company reorganized its management reporting and realigned its reportable segments in accordance with ASC 280, “Segment Reporting.”
	For the year ended September 30, 2014, Post operated in the following reportable business segments:
	•	Post Foods: including the Post branded ready-to-eat (“RTE”) cereal business;
	•	Michael Foods: including egg, potato, cheese and other dairy;
	•	Active Nutrition: including high protein shakes, bars, powders and nutritional supplements;
	•	Private Brands: including dry pasta, peanut butter and other nut butters, dried fruits and baking and snacking nuts; and
	•	Attune Foods: including premium natural and organic cereals and snacks.
	In connection with a reorganization of our business units, effective as of October 1, 2014, the reportable segments were changed as follows:
	•	Consumer Brands: including the Post branded RTE cereal business, the legacy Active Nutrition businesses and PowerBar;
	•	Michael Foods Group: including the Michael Foods legacy businesses and the dry pasta business; and
	•	Private Label: including the peanut butter and other nut butters (inclusive of the ABC business), dried fruits and baking and snacking nuts businesses and the legacy Attune Foods businesses.
	Management evaluates each segment’s performance based on its segment profit, which is its operating profit before impairment of property and intangible assets, plant closure related costs, restructuring expenses, and other unallocated corporate income and expenses. During the first quarter of fiscal 2015, the Company changed its methodology for allocating certain corporate costs to segment profit. Accordingly, segment profit for the three and six months ended March 31, 2014 has been adjusted to align with current year presentation. The following tables present information about the Company’s reportable segments, including corresponding amounts for the prior year.
				Three Months Ended March 31,						Six Months Ended March 31,
				2015			2014			2015			2014
	Net Sales
		Consumer Brands		$	378.5		$	310.1		$	726.4		$	584.2
		Michael Foods Group		550.3			66.7			1,149.60			66.7
		Private Label		124.9			61.2			252.7			84.4
		Eliminations		(1.0		)	—			(2.1		)	(0.3		)
			Total	$	1,052.70		$	438		$	2,126.60		$	735
	Segment Profit (Loss)
		Consumer Brands		$	46.3		$	38.6		$	77.6		$	86
		Michael Foods Group		39.8			(1.2		)	81.9			(1.2		)
		Private Label		10.4			3.9			17.3			6.5
			Total segment profit	96.5			41.3			176.8			91.3
	General corporate expenses and other			31.4			27.8			63.7			48.6
	Accelerated depreciation on plant closure			—			2			—			4.7
	Losses on hedge of purchase price of foreign currency denominated acquisition			—			11.8			—			13.1
	Loss on assets held for sale			15.4			—			22.5			—
	Interest expense			59.8			37.3			119.9			66.3
	Other expense, net			28.8			—			83.4			—
	Loss before income taxes			$	(38.9	)	$	(37.6	)	$	(112.7	)	$	(41.4	)
	Depreciation and amortization
		Consumer Brands		$	18.9		$	17		$	38		$	31.8
		Michael Foods Group		36.5			5.2			73.1			5.2
		Private Label		6.5			3.8			12.5			5.6
			Total segment depreciation and amortization	61.9			26			123.6			42.6
		Accelerated depreciation on plant closure		—			2			—			4.7
		Corporate		1.3			2.1			2.7			3.9
			Total	$	63.2		$	30.1		$	126.3		$	51.2
										31-Mar-15			30-Sep-14
	Assets
		Consumer Brands								$	3,071.40		$	2,932.20
		Michael Foods Group								3,601.80			3,726.50
		Private Label								663.5			558.6
		Corporate								678.5			513.8
			Total							$	8,015.20		$	7,731.10

Condensed_Consolidating_Financ

Condensed Consolidating Financial Statements of Guarantors	6 Months Ended
	Mar. 31, 2015
Schedule Of Condensed Financial Statements [Abstract]
Guarantor Financials	CONDENSED CONSOLIDATING FINANCIAL STATEMENTS OF GUARANTORS
	On February 3, 2012, the Company issued 7.375% senior notes due February 2022 in an aggregate principal amount of $775.0 to Ralcorp pursuant to a contribution agreement in connection with the internal reorganization. The aggregate principal amount of the 7.375% senior notes was increased to a total of $1,375.0 by subsequent issuances completed on October 25, 2012 and July 18, 2013.
	On November 18, 2013, the Company issued 6.75% senior notes due December 2021 in an aggregate principal amount of $525.0 to certain qualified institutional buyers. The aggregate principal amount of the 6.75% senior notes was increased to a total of $875.0 by a subsequent issuance completed on March 19, 2014.
	On June 2, 2014, the Company issued 6.00% senior notes due December 2022 in an aggregate principal amount of $630.0 to certain qualified institutional buyers.
	The 7.375% senior notes, the 6.75% senior notes and the 6.00% senior notes are fully and unconditionally guaranteed, jointly and severally, on a senior unsecured basis by each of our existing and future domestic subsidiaries, the “Guarantors.” Our foreign subsidiaries, the “Non-Guarantors,” do not guarantee the senior notes. These guarantees are subject to release in limited circumstances (only upon the occurrence of certain customary conditions).
	POST HOLDINGS, INC.
	CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS (Unaudited)
		Three Months Ended March 31, 2015
		Parent						Non-
		Company			Guarantors			Guarantors			Eliminations			Total
	Net Sales	$	—		$	957.6		$	106		$	(10.9	)	$	1,052.70
	Cost of goods sold	—			699.8			88.3			(10.9		)	777.2
	Gross Profit	—			257.8			17.7			—			275.5
	Selling, general and administrative expenses	4.3			156			13.4			—			173.7
	Amortization of intangible assets	—			31.3			2.4			—			33.7
	Loss on foreign currency	1			1.6			0.1			—			2.7
	Other operating expenses, net	—			15.5			0.2			—			15.7
	Operating (Loss) Profit	(5.3		)	53.4			1.6			—			49.7
	Interest expense (income), net	56.9			(0.2		)	3.1			—			59.8
	Other expense, net	28.8			—			—			—			28.8
	(Loss) Earnings before Income Taxes	(91.0		)	53.6			(1.5		)	—			(38.9		)
	Income tax (benefit) expense	(121.9		)	52.5			—			—			(69.4		)
	Net Earnings (Loss) before Equity in Subsidiaries	30.9			1.1			(1.5		)	—			30.5
	Equity (loss) earnings in subsidiaries	(0.4		)	(0.6		)	—			1			—
	Net Earnings (Loss)	$	30.5		$	0.5		$	(1.5	)	$	1		$	30.5
	Total Comprehensive Income (Loss)	$	4.1		$	0.8		$	(14.7	)	$	13.9		$	4.1
		Three Months Ended March 31, 2014
		Parent						Non-
		Company			Guarantors			Guarantors			Eliminations			Total
	Net Sales	$	—		$	390.1		$	51.2		$	(3.3	)	$	438
	Cost of goods sold	—			267.8			44.1			(3.3		)	308.6
	Gross Profit	—			122.3			7.1			—			129.4
	Selling, general and administrative expenses	3.7			96.6			4.7			—			105
	Amortization of intangible assets	—			10.9			1.8			—			12.7
	Loss on foreign currency	11.8			0.1			—			—			11.9
	Other operating expenses, net	—			0.1			—			—			0.1
	Operating (Loss) Profit	(15.5		)	14.6			0.6			—			(0.3		)
	Interest expense, net	35.4			—			1.9			—			37.3
	(Loss) Earnings before Income Taxes	(50.9		)	14.6			(1.3		)	—			(37.6		)
	Income tax (benefit) expense	(30.1		)	11.1			(0.3		)	—			(19.3		)
	Net (Loss) Earnings before Equity in Subsidiaries	(20.8		)	3.5			(1.0		)	—			(18.3		)
	Equity earnings in subsidiaries	2.5			—			—			(2.5		)	—
	Net (Loss) Earnings	$	(18.3	)	$	3.5		$	(1.0	)	$	(2.5	)	$	(18.3	)
	Total Comprehensive (Loss) Income	$	(17.8	)	$	3.3		$	(0.3	)	$	(3.0	)	$	(17.8	)
		Six Months Ended March 31, 2015
		Parent						Non-
		Company			Guarantors			Guarantors			Eliminations			Total
	Net Sales	$	—		$	1,918.50		$	229.4		$	(21.3	)	$	2,126.60
	Cost of goods sold	—			1,428.70			194.6			(21.3		)	1,602.00
	Gross Profit	—			489.8			34.8			—			524.6
	Selling, general and administrative expenses	7.4			305			27.3			—			339.7
	Amortization of intangible assets	—			62.1			5.1			—			67.2
	Loss on foreign currency	1.4			2.5			—			—			3.9
	Other operating expenses, net	—			23			0.2			—			23.2
	Operating (Loss) Profit	(8.8		)	97.2			2.2			—			90.6
	Interest expense (income), net	114			(0.5		)	6.4			—			119.9
	Other expense, net	83.4			—			—			—			83.4
	(Loss) Earnings before Income Taxes	(206.2		)	97.7			(4.2		)	—			(112.7		)
	Income tax (benefit) expense	(84.0		)	38.6			(0.5		)	—			(45.9		)
	Net (Loss) Earnings before Equity in Subsidiaries	(122.2		)	59.1			(3.7		)	—			(66.8		)
	Equity earnings (loss) in subsidiaries	55.4			(1.1		)	—			(54.3		)	—
	Net (Loss) Earnings	$	(66.8	)	$	58		$	(3.7	)	$	(54.3	)	$	(66.8	)
	Total Comprehensive (Loss) Income	$	(107.1	)	$	58.5		$	(23.9	)	$	(34.6	)	$	(107.1	)
		Six Months Ended March 31, 2014
	Parent						Non-
	Company			Guarantors			Guarantors			Eliminations			Total
Net Sales	$	—		$	674.9		$	70.8		$	(10.7	)	$	735
Cost of goods sold	—			441.9			59.9			(10.7		)	491.1
Gross Profit	—			233			10.9			—			243.9
Selling, general and administrative expenses	6.9			171.4			8.6			—			186.9
Amortization of intangible assets	—			16.6			1.8			—			18.4
Loss on foreign currency	13.1			0.4			—			—			13.5
Other operating expenses, net	—			0.2			—			—			0.2
Operating (Loss) Profit	(20.0		)	44.4			0.5			—			24.9
Interest expense, net	64.4			—			1.9			—			66.3
(Loss) Earnings before Income Taxes	(84.4		)	44.4			(1.4		)	—			(41.4		)
Income tax (benefit) expense	(42.0		)	21.6			(0.3		)	—			(20.7		)
Net (Loss) Earnings before Equity in Subsidiaries	(42.4		)	22.8			(1.1		)	—			(20.7		)
Equity earnings in subsidiaries	21.7			—			—			(21.7		)	—
Net (Loss) Earnings	$	(20.7	)	$	22.8		$	(1.1	)	$	(21.7	)	$	(20.7	)
Total Comprehensive (Loss) Income	$	(22.5	)	$	22.5		$	(2.6	)	$	(19.9	)	$	(22.5	)
POST HOLDINGS, INC.
CONDENSED CONSOLIDATING BALANCE SHEETS (Unaudited)
	31-Mar-15
	Parent						Non-
	Company			Guarantors			Guarantors			Eliminations			Total
ASSETS
Current Assets
Cash and cash equivalents	$	557.1		$	17.7		$	12.9		$	(8.7	)	$	579
Restricted cash	1.1			11.4			1.1			—			13.6
Receivables, net	6.5			306.6			46			(10.4		)	348.7
Inventories	—			407.9			54			—			461.9
Deferred income taxes	22.8			—			—			—			22.8
Intercompany notes receivable	6.2			—			—			(6.2		)	—
Prepaid expenses and other current assets	14.6			33.4			1.2			—			49.2
Total Current Assets	608.3			777			115.2			(25.3		)	1,475.20
Property, net	—			775			52.4			—			827.4
Goodwill	—			2,807.30			135.8			—			2,943.10
Other intangible assets, net	—			2,586.10			108.1			—			2,694.20
Intercompany receivable	1,060.90			—			—			(1,060.9		)	—
Intercompany notes receivable	157.9			—			—			(157.9		)	—
Investment in subsidiaries	5,558.70			23.7			—			(5,582.4		)	—
Other assets	60.4			13.2			1.7			—			75.3
Total Assets	$	7,446.20		$	6,982.30		$	413.2		$	(6,826.5	)	$	8,015.20
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current Liabilities
Current portion of long-term debt	$	22.5		$	2		$	0.4		$	—		$	24.9
Accounts payable	—			215			33.4			(19.1		)	229.3
Intercompany notes payable	—			—			6.2			(6.2		)	—
Other current liabilities	107.1			160			15.8			—			282.9
Total Current Liabilities	129.6			377			55.8			(25.3		)	537.1
Long-term debt	3,810.40			1.9			2.8			—			3,815.10
Intercompany payable	—			1,058.90			2			(1,060.9		)	—
Intercompany notes payable	—			—			157.9			(157.9		)	—
Deferred income taxes	831.9			—			27.3			—			859.2
Other liabilities	150.4			119.6			9.9			—			279.9
Total Liabilities	4,922.30			1,557.40			255.7			(1,244.1		)	5,491.30
Total Shareholders’ Equity	2,523.90			5,424.90			157.5			(5,582.4		)	2,523.90
Total Liabilities and Shareholders’ Equity	$	7,446.20		$	6,982.30		$	413.2		$	(6,826.5	)	$	8,015.20
	30-Sep-14
	Parent						Non-
	Company			Guarantors			Guarantors			Eliminations			Total
ASSETS
Current Assets
Cash and cash equivalents	$	246.6		$	15.7		$	10		$	(3.9	)	$	268.4
Restricted cash	1.1			79.8			3.9			—			84.8
Receivables, net	78			305.2			45.9			(15.4		)	413.7
Inventories	—			336.5			44.2			—			380.7
Deferred income taxes	27			—			—			—			27
Intercompany notes receivable	6.3			—			—			(6.3		)	—
Prepaid expenses and other current assets	11.4			30.4			2.6			—			44.4
Total Current Assets	370.4			767.6			106.6			(25.6		)	1,219.00
Property, net	—			775.9			56			—			831.9
Goodwill	—			2,732.80			153.9			—			2,886.70
Other intangible assets, net	—			2,518.50			124.5			—			2,643.00
Intercompany receivable	1,015.40			—			—			(1,015.4		)	—
Intercompany notes receivable	178.9			—			—			(178.9		)	—
Investment in subsidiaries	5,543.10			8.1			—			(5,551.2		)	—
Other assets	61.7			86.1			2.7			—			150.5
Total Assets	$	7,169.50		$	6,889.00		$	443.7		$	(6,771.1	)	$	7,731.10
LIABILITIES AND SHAREHOLDERS’ EQUITY
Current Liabilities
Current portion of long-term debt	$	22.2		$	3		$	0.4		$	—		$	25.6
Accounts payable	—			212.2			32.1			(19.3		)	225
Intercompany notes payable	—			—			6.3			(6.3		)	—
Other current liabilities	100.4			153.8			15.1			—			269.3
Total Current Liabilities	122.6			369			53.9			(25.6		)	519.9
Long-term debt	3,824.20			2.9			3.4			—			3,830.50
Intercompany payable	—			1,013.80			1.6			(1,015.4		)	—
Intercompany notes payable	—			—			178.9			(178.9		)	—
Deferred income taxes	883.8			—			31.3			—			915.1
Other liabilities	55.7			115.9			10.8			—			182.4
Total Liabilities	4,886.30			1,501.60			279.9			(1,219.9		)	5,447.90
Total Shareholders’ Equity	2,283.20			5,387.40			163.8			(5,551.2		)	2,283.20
Total Liabilities and Shareholders’ Equity	$	7,169.50		$	6,889.00		$	443.7		$	(6,771.1	)	$	7,731.10
POST HOLDINGS, INC.
CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS (Unaudited)
	Six Months Ended March 31, 2015
	Parent						Non-
	Company			Guarantors			Guarantors			Eliminations			Total
Net Cash (Used In) Provided by Operating Activities	$	14		$	203.7		$	4.6		$	(63.9	)	$	158.4
Cash Flows from Investing Activities
Business acquisitions	(3.5		)	(183.2		)	(1.2		)	—			(187.9		)
Additions to property	—			(43.7		)	(1.9		)	—			(45.6		)
Restricted cash	—			68.4			2.7			—			71.1
Insurance proceeds on property losses	—			1.8			—			—			1.8
Proceeds from equity distributions	121.5			—			—			(121.5		)	—
Capitalization of subsidiaries	(138.6		)	—			—			138.6			—
Net receipts from intercompany revolver	0.6			—			—			(0.6		)	—
Net Cash Provided by (Used in) Investing Activities	(20.0		)	(156.7		)	(0.4		)	16.5			(160.6		)
Cash Flows from Financing Activities
Proceeds from issuance of common stock	341.4			—			—			—			341.4
Repayments of long-term debt	(11.0		)	(2.0		)	(0.2		)	—			(13.2		)
Payment of dividend	(8.5		)	—			—			—			(8.5		)
Payments of debt issuance costs	(3.7		)	—			—			—			(3.7		)
Other, net	(1.7		)	—			—			—			(1.7		)
Payments for equity distributions	—			(171.0		)	—			171			—
Proceeds from Parent capitalization	—			128			1			(129.0		)	—
Net payments from intercompany revolver	—			—			(0.6		)	0.6			—
Net Cash Provided by (Used in) Financing Activities	316.5			(45.0		)	0.2			42.6			314.3
Effect of exchange rate changes on cash and cash equivalents	—			—			(1.5		)	—			(1.5		)
Net Increase (Decrease) in Cash and Cash Equivalents	310.5			2			2.9			(4.8		)	310.6
Cash and Cash Equivalents, Beginning of Year	246.6			15.7			10			(3.9		)	268.4
Cash and Cash Equivalents, End of Period	$	557.1		$	17.7		$	12.9		$	(8.7	)	$	579
	Six Months Ended March 31, 2014
	Parent						Non-
	Company			Guarantors			Guarantors			Eliminations			Total
Net Cash (Used in) Provided by Operating Activities	$	(27.5	)	$	80.9		$	(4.7	)	$	(30.2	)	$	18.5
Cash Flows from Investing Activities
Business acquisitions	(751.5		)	4.7			(288.4		)	—			(1,035.2		)
Cash advance for acquisitions	(25.0		)	—			—			—			(25.0		)
Additions to property	—			(25.9		)	(0.8		)	—			(26.7		)
Restricted cash	37			—			(0.7		)	—			36.3
Proceeds from equity contributions	38.5			—			—			(38.5		)	—
Capitalization of subsidiaries	(294.8		)	—			—			294.8			—
Net Cash Used in Investing Activities	(995.8		)	(21.2		)	(289.9		)	256.3			(1,050.6		)
Cash Flows from Financing Activities
Proceeds from issuance of senior notes	875			—			—			—			875
Proceeds from issuance of preferred stock	310.2			—			—			—			310.2
Proceeds from issuance of common stock	303.5			—			—			—			303.5
Payment of preferred stock dividend	(5.9		)	—			—			—			(5.9		)
Payments of debt issuance costs	(19.8		)	—			—			—			(19.8		)
Other, net	0.2			—			—			—			0.2
Proceeds from parent capitalization	—			—			294.8			(294.8		)	—
Payments for equity distributions	—			(61.4		)	—			61.4			—
Net Cash Provided by (Used in) by Financing Activities	1,463.20			(61.4		)	294.8			(233.4		)	1,463.20
Effect of Exchange Rate Changes on Cash	(6.7		)	—			(0.5		)	—			(7.2		)
Net Increase (Decrease) in Cash and Cash Equivalents	433.2			(1.7		)	(0.3		)	(7.3		)	423.9
Cash and Cash Equivalents, Beginning of Year	391.4			4.1			8.2			(1.7		)	402
Cash and Cash Equivalents, End of Period	$	824.6		$	2.4		$	7.9		$	(9.0	)	$	825.9

Subsequent_Events

Subsequent Events	6 Months Ended
	Mar. 31, 2015
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTS
	Preferred Stock Dividend
	On April 16, 2015, the Company’s Board of Directors declared a quarterly dividend of $0.9375 per share, representing payment for the dividend period from the date of February 15, 2015 to May 14, 2015, on the Company’s 3.75% Series B Cumulative Perpetual Convertible Preferred Stock. The Board of Directors also declared a quarterly dividend of $0.625 per share, representing payment for the dividend period from February 15, 2015 to May 14, 2015, on the Company’s 2.5% Series C Cumulative Perpetual Convertible Preferred Stock. Both dividends will be paid on May 15, 2015 to preferred shareholders of record as of May 1, 2015.
	Closing on MOM Brands Acquisition
	On May 4, 2015, the Company completed its acquisition of MOM Brands, a leader in the ready-to-eat cereal value segment. The acquisition strengthens the Company’s position in the ready-to-eat cereal category. The purchase price of $1,150.0 was paid from cash on hand, including $700.0 in proceeds from the New Term Loan and the issuance of 2.4 million shares of the Company’s common stock to the former owners of MOM Brands.
	This transaction will be accounted for as a business combination under the acquisition method of accounting. The Company will record the assets acquired and liabilities assumed at their fair values as of the acquisition date. Due to the limited time since closing of the acquisition, the valuation efforts and related acquisition accounting are incomplete at the time of filing of the condensed consolidated financial statements. As a result, the Company is unable to provide amounts recognized as of the acquisition date for major classes of assets and liabilities acquired, including goodwill. In addition, because the acquisition accounting is incomplete, the Company is unable to provide the supplemental pro forma revenue and earnings for the combined entity, as the pro forma adjustments are expected to primarily consist of estimates for the amortization of identifiable intangible assets acquired and related income tax effects which will result from the purchase price allocation and determination of the fair values for the assets acquired and liabilities assumed.

Restructuring_Tables

Restructuring (Tables)	6 Months Ended
	Mar. 31, 2015
Restructuring and Related Activities [Abstract]
Restructuring and Related Costs
		Three Months Ended March 31,				Six Months Ended March 31,					Cumulative Incurred to Date		Total Expected to be Incurred
		2015		2014		2015			2014
	Boise:
	Employee severance	$	3.1	$	—	$	3.1		$	—	$	3.1	$	3.1
	Modesto:
	Employee severance	—		0.2		—			0.7		3.2		3.2
	Pension curtailment	—		—		—			—		1.7		1.7
	Accelerated depreciation	—		2		—			4.7		17.6		17.6
	Total Modesto	—		2.2		—			5.4		22.5		22.5
		$	3.1	$	2.2	$	3.1		$	5.4	$	25.6	$	25.6
Restructuring Liabilities Rollforward
		30-Sep-14		Costs Incurred and Charged to Expense		Costs Paid			31-Mar-15
	Employee severance:
	Boise	$	—	$	3.1	$	—		$	3.1
	Modesto	0.7		—		(0.5		)	0.2
		$	0.7	$	3.1	$	(0.5	)	$	3.3

Business_Combinations_Tables

Business Combinations (Tables)	6 Months Ended
	Mar. 31, 2015
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition
		PowerBar			ABC
	Cash and cash equivalents	$	2.4		$	0.6
	Receivables	6.5			12.8
	Inventories	23.1			15.5
	Prepaid expenses and other current assets	0.1			0.4
	Property	17.3			19.7
	Goodwill	19.7			49.6
	Other intangible assets	61.3			71.9
	Deferred tax asset - long-term	11.7			—
	Other assets	—			0.4
	Accounts payable	(1.2		)	(9.0		)
	Deferred tax liability - current	(0.8		)	(0.4		)
	Other current liabilities	(4.6		)	(2.8		)
	Deferred tax liability - long-term	(1.1		)	(30.7		)
	Total acquisition cost	$	134.4		$	128
Purchase Price Adjustments by Business Combination
		Acquisition Date Amounts Recognized as of September 30, 2014 (a)			Adjustments During the Six Months Ended March 31, 2015			Acquisition Date Amounts Recognized (as Adjusted)
	Cash and cash equivalents	$	73.8		$	—		$	73.8
	Restricted cash	3.4			—			3.4
	Receivables (b) (d)	219.6			(0.3		)	219.3
	Income tax receivable	62.5			—			62.5
	Inventories	289.9			—			289.9
	Deferred tax asset - current (b)	5.4			0.7			6.1
	Prepaid expenses and other current assets	9.3			—			9.3
	Property	440.5			—			440.5
	Goodwill	1,605.40			5.2			1,610.60
	Other intangible assets	1,883.70			—			1,883.70
	Other assets	9.1			—			9.1
	Current portion of long-term debt	(3.7		)	—			(3.7		)
	Accounts payable (d)	(142.6		)	0.2			(142.4		)
	Other current liabilities (d)	(121.5		)	(0.3		)	(121.8		)
	Long-term debt	(8.4		)	—			(8.4		)
	Deferred tax liability - long-term (b)	(697.1		)	7			(690.1		)
	Other liabilities (b)	(11.8		)	(9.0		)	(20.8		)
	Total acquisition cost (c)	$	3,617.50		$	3.5		$	3,621.00
Business Acquisition, Pro Forma Information
		Three Months Ended March 31,						Six Months Ended March 31,
		2015			2014			2015			2014
	Pro forma net sales	$	1,052.70		$	1,014.60		$	2,139.10		$	2,082.40
	Pro forma net income (loss) available to common shareholders	26.4			(23.9		)	(70.5		)	(28.5		)
	Pro forma basic income (loss) per share	$	0.48		$	(0.71	)	$	(1.35	)	$	(0.86	)
	Pro forma diluted income (loss) per share	$	0.45		$	(0.71	)	$	(1.35	)	$	(0.86	)

Goodwill_Tables

Goodwill (Tables)	6 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Changes in carrying amount of goodwill	The changes in the carrying amount of goodwill by segment are noted in the following table.
		Consumer Brands			Michael Foods Group			Private Label			Total
	Balance, September 30, 2014
	Goodwill (gross)	$	1,950.60		$	1,347.20		$	229.3		$	3,527.10
	Accumulated impairment losses	(640.4		)	—			—			(640.4		)
	Goodwill (net)	$	1,310.20		$	1,347.20		$	229.3		$	2,886.70
	Goodwill acquired	19.7			—			49.6			69.3
	Acquisition related adjustment	10.8			(5.6		)	—			5.2
	Currency translation adjustment	(0.7		)	—			(17.4		)	(18.1		)
	Balance, March 31, 2015
	Goodwill (gross)	$	1,980.40		$	1,341.60		$	261.5		$	3,583.50
	Accumulated impairment losses	(640.4		)	—			—			(640.4		)
	Goodwill (net)	$	1,340.00		$	1,341.60		$	261.5		$	2,943.10

Intangible_Assets_net_Tables

Intangible Assets, net (Tables)	6 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Total intangible assets
		31-Mar-15							30-Sep-14
		Carrying		Accumulated Amortization			Net		Carrying		Accumulated Amortization			Net
		Amount					Amount		Amount					Amount
	Subject to amortization:
	Customer relationships	$	1,818.70	$	(139.8	)	$	1,678.90	$	1,743.70	$	(90.9	)	$	1,652.80
	Trademarks/brands	607.5		(59.7		)	547.8		554.7		(43.9		)	510.8
	Other intangible assets	22.3		(4.3		)	18		24.7		(3.0		)	21.7
		2,448.50		(203.8		)	2,244.70		2,323.10		(137.8		)	2,185.30
	Not subject to amortization:
	Trademarks/brands	449.5		—			449.5		457.7		—			457.7
		$	2,898.00	$	(203.8	)	$	2,694.20	$	2,780.80	$	(137.8	)	$	2,643.00

Earnings_Loss_Per_Share_Tables

Earnings (Loss) Per Share (Tables)	6 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Computation of basic and diluted earnings per share	The following table sets forth the computation of basic and diluted earnings (loss) per share for the three and six months ended March 31, 2015 and 2014, respectively.
		Three Months Ended March 31,					Six Months Ended March 31,
		2015		2014			2015			2014
	Net earnings for basic earnings (loss) per share	$	26.3	$	(22.6	)	$	(75.3	)	$	(27.6	)
	Net earnings for diluted earnings (loss) per share	$	30.5	$	(22.6	)	$	(75.3	)	$	(27.6	)
	Weighted-average shares outstanding	49.6		33.6			47.2			33.1
	Effect of TEUs on weighted-average shares for basic earnings (loss) per share	4.9		—			4.9			—
	Weighted-average shares for basic earnings (loss) per share	54.5		33.6			52.1			33.1
	Effect of dilutive securities:
	Stock options	0.6		—			—			—
	Stock appreciation rights	0.1		—			—			—
	Restricted stock awards	0.3		—			—			—
	TEUs	1.1		—			—			—
	Preferred shares conversion to common	11		—			—			—
	Total dilutive securities	13.1		—			—			—
	Weighted-average shares for diluted earnings (loss) per share	67.6		33.6			52.1			33.1
	Basic earnings (loss) per common share	$	0.48	$	(0.67	)	$	(1.45	)	$	(0.83	)
	Diluted earnings (loss) per common share	$	0.45	$	(0.67	)	$	(1.45	)	$	(0.83	)

Inventories_Tables

Inventories (Tables)	6 Months Ended
	Mar. 31, 2015
Inventory [Abstract]
Schedule of Inventory
		31-Mar-15		30-Sep-14
	Raw materials and supplies	$	130.5	$	99.2
	Work in process	14.3		16.3
	Finished products	288.8		235.8
	Flocks	28.3		29.4
		$	461.9	$	380.7

Property_net_Tables

Property, net (Tables)	6 Months Ended
	Mar. 31, 2015
Property, Plant and Equipment [Abstract]
Schedule of Property, net
		31-Mar-15			30-Sep-14
	Property, at cost	$	1,170.80		$	1,121.00
	Accumulated depreciation	(343.4		)	(289.1		)
		$	827.4		$	831.9

Derivative_Financial_Instrumen1

Derivative Financial Instruments and Hedging (Tables)	6 Months Ended
	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments in Statement of Financial Position
			Fair Value of Assets as of March 31, 2015
		Balance Sheet Location	Gross Amounts of Recognized Assets			Gross Amounts Offset in the Condensed Consolidated Balance Sheet			Net Amounts of Assets Presented in the Condensed Consolidated Balance Sheet
	Commodity contracts	Prepaid expenses and other current assets	$	0.2		$	(0.1	)	$	0.1
	Natural gas and heating oil futures	Prepaid expenses and other current assets	0.2			—			0.2
			$	0.4		$	(0.1	)	$	0.3
			Fair Value of Liabilities as of March 31, 2015
		Balance Sheet Location	Gross Amounts of Recognized Liabilities			Gross Amounts Offset in the Condensed Consolidated Balance Sheet			Net Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheet
	Commodity contracts	Other current liabilities	$	1.3		$	(0.1	)	$	1.2
	Natural gas and heating oil futures	Other current liabilities	6.9			—			6.9
	Interest rate swaps	Other current liabilities	0.8			—			0.8
	Interest rate swaps	Other liabilities	123.8			—			123.8
			$	132.8		$	(0.1	)	$	132.7
			Fair Value of Liabilities as of September 30, 2014
		Balance Sheet Location	Gross Amounts of Recognized Liabilities			Gross Amounts Offset in the Condensed Consolidated Balance Sheet			Net Amounts of Liabilities Presented in the Condensed Consolidated Balance Sheet
	Commodity contracts	Other current liabilities	$	8		$	—		$	8
	Natural gas and heating oil futures	Other current liabilities	0.9			—			0.9
	Interest rate swaps	Other current liabilities	2.7			—			2.7
	Interest rate swaps	Other liabilities	40.4			—			40.4
			$	52		$	—		$	52
Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance
			Gain (Loss) Recognized in Earnings
			Three Months Ended March 31,						Six Months Ended March 31,
	Derivative Instrument	Location of Gain (Loss) Recognized in Earnings	2015			2014			2015			2014
	Commodity contracts	Cost of goods sold	$	0.2		$	0.8		$	8.4		$	1
	Natural gas and heating oil futures	Cost of goods sold	4.9			(0.2		)	(3.6		)	0.5
	Foreign exchange contracts	Selling, general and administrative expenses	—			(5.6		)	—			(6.3		)
	Interest rate swaps	Other expense, net	(28.8		)	—			(83.4		)	—

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	6 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Assets and liabilities measured at fair value	The following table represents Post’s assets and liabilities measured at fair value on a recurring basis and the basis for that measurement according to the levels in the fair value hierarchy in ASC Topic 820:
		31-Mar-15						30-Sep-14
		Total		Level 1		Level 2		Total		Level 1		Level 2
	Assets:
	Deferred compensation investment	$	11.3	$	11.3	$	—	$	10.2	$	10.2	$	—
	Derivative assets	0.3		—		0.3		—		—		—
		$	11.6	$	11.3	$	0.3	$	10.2	$	10.2	$	—
	Liabilities:
	Deferred compensation liabilities	$	15.8	$	—	$	15.8	$	12.3	$	—	$	12.3
	Derivative liabilities	132.7		—		132.7		52		—		52
		$	148.5	$	—	$	148.5	$	64.3	$	—	$	64.3
	The following table represents the fair value of Post’s long-term debt, which is not recorded at fair value in the Condensed Consolidated Balance Sheets, and is classified as Level 2 in the fair value hierarchy per ASC Topic 820:
		31-Mar-15		30-Sep-14
	Senior notes	$	2,914.80	$	2,768.20
	Term loan	880.2		872.9
	TEUs	30.3		29.5
		$	3,825.30	$	3,670.60

LongTerm_Debt_Tables

Long-Term Debt (Tables)	6 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Schedule of Long-term Debt Instruments	Long-term debt as of the dates indicated consists of the following:
		31-Mar-15			September 30, 2014
	7.375% Senior Notes maturing February 2022	$	1,375.00		$	1,375.00
	6.75% Senior Notes maturing December 2021	875			875
	6.00% Senior Notes maturing December 2022	630			630
	Term loan	878.4			882.8
	TEUs	31.8			38.4
	4.57% 2012 Series Bond maturing September 2017	3.9			4.8
	Secured notes	—			1.1
	Capital leases	3.1			3.8
		$	3,797.20		$	3,810.90
	Less: Current portion	(24.9		)	(25.6		)
	Plus: Unamortized premium (discount), net	42.8			45.2
	Total long-term debt	$	3,815.10		$	3,830.50

Pension_and_Other_Postretireme1

Pension and Other Postretirement Benefits (Tables)	6 Months Ended
	Mar. 31, 2015
Pension and Other Postretirement Benefit Expense [Abstract]
Schedule of net benefit costs and assumptions used in calculation	The following tables provide the components of net periodic benefit cost for the plans.
		Pension Benefits
		Three Months Ended March 31,						Six Months Ended March 31,
		2015			2014			2015			2014
	Components of net periodic benefit cost
	Service cost	$	0.9		$	0.9		$	1.9		$	1.8
	Interest cost	0.5			0.6			1.1			1.1
	Expected return on plan assets	(0.5		)	(0.6		)	(1.2		)	(1.1		)
	Recognized net actuarial loss	0.2			0.2			0.4			0.4
	Recognized prior service cost	0.1			0.1			0.2			0.2
	Net periodic benefit cost	$	1.2		$	1.2		$	2.4		$	2.4
		Other Benefits
		Three Months Ended March 31,						Six Months Ended March 31,
		2015			2014			2015			2014
	Components of net periodic benefit cost
	Service cost	$	0.5		$	0.5		$	1		$	1
	Interest cost	1.2			1.2			2.4			2.3
	Recognized net actuarial loss	0.3			0.1			0.7			0.2
	Recognized prior service credit	(0.4		)	(0.6		)	(0.8		)	(1.2		)
	Net periodic benefit cost	$	1.6		$	1.2		$	3.3		$	2.3

Segments_Tables

Segments (Tables)	6 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment
				Three Months Ended March 31,						Six Months Ended March 31,
				2015			2014			2015			2014
	Net Sales
		Consumer Brands		$	378.5		$	310.1		$	726.4		$	584.2
		Michael Foods Group		550.3			66.7			1,149.60			66.7
		Private Label		124.9			61.2			252.7			84.4
		Eliminations		(1.0		)	—			(2.1		)	(0.3		)
			Total	$	1,052.70		$	438		$	2,126.60		$	735
	Segment Profit (Loss)
		Consumer Brands		$	46.3		$	38.6		$	77.6		$	86
		Michael Foods Group		39.8			(1.2		)	81.9			(1.2		)
		Private Label		10.4			3.9			17.3			6.5
			Total segment profit	96.5			41.3			176.8			91.3
	General corporate expenses and other			31.4			27.8			63.7			48.6
	Accelerated depreciation on plant closure			—			2			—			4.7
	Losses on hedge of purchase price of foreign currency denominated acquisition			—			11.8			—			13.1
	Loss on assets held for sale			15.4			—			22.5			—
	Interest expense			59.8			37.3			119.9			66.3
	Other expense, net			28.8			—			83.4			—
	Loss before income taxes			$	(38.9	)	$	(37.6	)	$	(112.7	)	$	(41.4	)
	Depreciation and amortization
		Consumer Brands		$	18.9		$	17		$	38		$	31.8
		Michael Foods Group		36.5			5.2			73.1			5.2
		Private Label		6.5			3.8			12.5			5.6
			Total segment depreciation and amortization	61.9			26			123.6			42.6
		Accelerated depreciation on plant closure		—			2			—			4.7
		Corporate		1.3			2.1			2.7			3.9
			Total	$	63.2		$	30.1		$	126.3		$	51.2
										31-Mar-15			30-Sep-14
	Assets
		Consumer Brands								$	3,071.40		$	2,932.20
		Michael Foods Group								3,601.80			3,726.50
		Private Label								663.5			558.6
		Corporate								678.5			513.8
			Total							$	8,015.20		$	7,731.10

Condensed_Consolidating_Financ1

Condensed Consolidating Financial Statements of Guarantors (Tables)	6 Months Ended
	Mar. 31, 2015
Schedule Of Condensed Financial Statements [Abstract]
Schedule of Condensed Income Statement [Table Text Block]	POST HOLDINGS, INC.
	CONDENSED CONSOLIDATING STATEMENTS OF OPERATIONS (Unaudited)
		Three Months Ended March 31, 2015
		Parent						Non-
		Company			Guarantors			Guarantors			Eliminations			Total
	Net Sales	$	—		$	957.6		$	106		$	(10.9	)	$	1,052.70
	Cost of goods sold	—			699.8			88.3			(10.9		)	777.2
	Gross Profit	—			257.8			17.7			—			275.5
	Selling, general and administrative expenses	4.3			156			13.4			—			173.7
	Amortization of intangible assets	—			31.3			2.4			—			33.7
	Loss on foreign currency	1			1.6			0.1			—			2.7
	Other operating expenses, net	—			15.5			0.2			—			15.7
	Operating (Loss) Profit	(5.3		)	53.4			1.6			—			49.7
	Interest expense (income), net	56.9			(0.2		)	3.1			—			59.8
	Other expense, net	28.8			—			—			—			28.8
	(Loss) Earnings before Income Taxes	(91.0		)	53.6			(1.5		)	—			(38.9		)
	Income tax (benefit) expense	(121.9		)	52.5			—			—			(69.4		)
	Net Earnings (Loss) before Equity in Subsidiaries	30.9			1.1			(1.5		)	—			30.5
	Equity (loss) earnings in subsidiaries	(0.4		)	(0.6		)	—			1			—
	Net Earnings (Loss)	$	30.5		$	0.5		$	(1.5	)	$	1		$	30.5
	Total Comprehensive Income (Loss)	$	4.1		$	0.8		$	(14.7	)	$	13.9		$	4.1
		Three Months Ended March 31, 2014
		Parent						Non-
		Company			Guarantors			Guarantors			Eliminations			Total
	Net Sales	$	—		$	390.1		$	51.2		$	(3.3	)	$	438
	Cost of goods sold	—			267.8			44.1			(3.3		)	308.6
	Gross Profit	—			122.3			7.1			—			129.4
	Selling, general and administrative expenses	3.7			96.6			4.7			—			105
	Amortization of intangible assets	—			10.9			1.8			—			12.7
	Loss on foreign currency	11.8			0.1			—			—			11.9
	Other operating expenses, net	—			0.1			—			—			0.1
	Operating (Loss) Profit	(15.5		)	14.6			0.6			—			(0.3		)
	Interest expense, net	35.4			—			1.9			—			37.3
	(Loss) Earnings before Income Taxes	(50.9		)	14.6			(1.3		)	—			(37.6		)
	Income tax (benefit) expense	(30.1		)	11.1			(0.3		)	—			(19.3		)
	Net (Loss) Earnings before Equity in Subsidiaries	(20.8		)	3.5			(1.0		)	—			(18.3		)
	Equity earnings in subsidiaries	2.5			—			—			(2.5		)	—
	Net (Loss) Earnings	$	(18.3	)	$	3.5		$	(1.0	)	$	(2.5	)	$	(18.3	)
	Total Comprehensive (Loss) Income	$	(17.8	)	$	3.3		$	(0.3	)	$	(3.0	)	$	(17.8	)
		Six Months Ended March 31, 2015
		Parent						Non-
		Company			Guarantors			Guarantors			Eliminations			Total
	Net Sales	$	—		$	1,918.50		$	229.4		$	(21.3	)	$	2,126.60
	Cost of goods sold	—			1,428.70			194.6			(21.3		)	1,602.00
	Gross Profit	—			489.8			34.8			—			524.6
	Selling, general and administrative expenses	7.4			305			27.3			—			339.7
	Amortization of intangible assets	—			62.1			5.1			—			67.2
	Loss on foreign currency	1.4			2.5			—			—			3.9
	Other operating expenses, net	—			23			0.2			—			23.2
	Operating (Loss) Profit	(8.8		)	97.2			2.2			—			90.6
	Interest expense (income), net	114			(0.5		)	6.4			—			119.9
	Other expense, net	83.4			—			—			—			83.4
	(Loss) Earnings before Income Taxes	(206.2		)	97.7			(4.2		)	—			(112.7		)
	Income tax (benefit) expense	(84.0		)	38.6			(0.5		)	—			(45.9		)
	Net (Loss) Earnings before Equity in Subsidiaries	(122.2		)	59.1			(3.7		)	—			(66.8		)
	Equity earnings (loss) in subsidiaries	55.4			(1.1		)	—			(54.3		)	—
	Net (Loss) Earnings	$	(66.8	)	$	58		$	(3.7	)	$	(54.3	)	$	(66.8	)
	Total Comprehensive (Loss) Income	$	(107.1	)	$	58.5		$	(23.9	)	$	(34.6	)	$	(107.1	)
		Six Months Ended March 31, 2014
		Parent						Non-
		Company			Guarantors			Guarantors			Eliminations			Total
	Net Sales	$	—		$	674.9		$	70.8		$	(10.7	)	$	735
	Cost of goods sold	—			441.9			59.9			(10.7		)	491.1
	Gross Profit	—			233			10.9			—			243.9
Selling, general and administrative expenses	6.9			171.4			8.6			—			186.9
Amortization of intangible assets	—			16.6			1.8			—			18.4
Loss on foreign currency	13.1			0.4			—			—			13.5
Other operating expenses, net	—			0.2			—			—			0.2
Operating (Loss) Profit	(20.0		)	44.4			0.5			—			24.9
Interest expense, net	64.4			—			1.9			—			66.3
(Loss) Earnings before Income Taxes	(84.4		)	44.4			(1.4		)	—			(41.4		)
Income tax (benefit) expense	(42.0		)	21.6			(0.3		)	—			(20.7		)
Net (Loss) Earnings before Equity in Subsidiaries	(42.4		)	22.8			(1.1		)	—			(20.7		)
Equity earnings in subsidiaries	21.7			—			—			(21.7		)	—
Net (Loss) Earnings	$	(20.7	)	$	22.8		$	(1.1	)	$	(21.7	)	$	(20.7	)
Total Comprehensive (Loss) Income	$	(22.5	)	$	22.5		$	(2.6	)	$	(19.9	)	$	(22.5	)
Schedule of Condensed Balance Sheet [Table Text Block]	POST HOLDINGS, INC.
	CONDENSED CONSOLIDATING BALANCE SHEETS (Unaudited)
		31-Mar-15
		Parent						Non-
		Company			Guarantors			Guarantors			Eliminations			Total
	ASSETS
	Current Assets
	Cash and cash equivalents	$	557.1		$	17.7		$	12.9		$	(8.7	)	$	579
	Restricted cash	1.1			11.4			1.1			—			13.6
	Receivables, net	6.5			306.6			46			(10.4		)	348.7
	Inventories	—			407.9			54			—			461.9
	Deferred income taxes	22.8			—			—			—			22.8
	Intercompany notes receivable	6.2			—			—			(6.2		)	—
	Prepaid expenses and other current assets	14.6			33.4			1.2			—			49.2
	Total Current Assets	608.3			777			115.2			(25.3		)	1,475.20
	Property, net	—			775			52.4			—			827.4
	Goodwill	—			2,807.30			135.8			—			2,943.10
	Other intangible assets, net	—			2,586.10			108.1			—			2,694.20
	Intercompany receivable	1,060.90			—			—			(1,060.9		)	—
	Intercompany notes receivable	157.9			—			—			(157.9		)	—
	Investment in subsidiaries	5,558.70			23.7			—			(5,582.4		)	—
	Other assets	60.4			13.2			1.7			—			75.3
	Total Assets	$	7,446.20		$	6,982.30		$	413.2		$	(6,826.5	)	$	8,015.20
	LIABILITIES AND SHAREHOLDERS’ EQUITY
	Current Liabilities
	Current portion of long-term debt	$	22.5		$	2		$	0.4		$	—		$	24.9
	Accounts payable	—			215			33.4			(19.1		)	229.3
	Intercompany notes payable	—			—			6.2			(6.2		)	—
	Other current liabilities	107.1			160			15.8			—			282.9
	Total Current Liabilities	129.6			377			55.8			(25.3		)	537.1
	Long-term debt	3,810.40			1.9			2.8			—			3,815.10
	Intercompany payable	—			1,058.90			2			(1,060.9		)	—
	Intercompany notes payable	—			—			157.9			(157.9		)	—
	Deferred income taxes	831.9			—			27.3			—			859.2
	Other liabilities	150.4			119.6			9.9			—			279.9
	Total Liabilities	4,922.30			1,557.40			255.7			(1,244.1		)	5,491.30
	Total Shareholders’ Equity	2,523.90			5,424.90			157.5			(5,582.4		)	2,523.90
	Total Liabilities and Shareholders’ Equity	$	7,446.20		$	6,982.30		$	413.2		$	(6,826.5	)	$	8,015.20
		30-Sep-14
		Parent						Non-
		Company			Guarantors			Guarantors			Eliminations			Total
	ASSETS
	Current Assets
	Cash and cash equivalents	$	246.6		$	15.7		$	10		$	(3.9	)	$	268.4
	Restricted cash	1.1			79.8			3.9			—			84.8
	Receivables, net	78			305.2			45.9			(15.4		)	413.7
	Inventories	—			336.5			44.2			—			380.7
	Deferred income taxes	27			—			—			—			27
	Intercompany notes receivable	6.3			—			—			(6.3		)	—
	Prepaid expenses and other current assets	11.4			30.4			2.6			—			44.4
	Total Current Assets	370.4			767.6			106.6			(25.6		)	1,219.00
	Property, net	—			775.9			56			—			831.9
	Goodwill	—			2,732.80			153.9			—			2,886.70
	Other intangible assets, net	—			2,518.50			124.5			—			2,643.00
	Intercompany receivable	1,015.40			—			—			(1,015.4		)	—
	Intercompany notes receivable	178.9			—			—			(178.9		)	—
	Investment in subsidiaries	5,543.10			8.1			—			(5,551.2		)	—
	Other assets	61.7			86.1			2.7			—			150.5
	Total Assets	$	7,169.50		$	6,889.00		$	443.7		$	(6,771.1	)	$	7,731.10
	LIABILITIES AND SHAREHOLDERS’ EQUITY
	Current Liabilities
	Current portion of long-term debt	$	22.2		$	3		$	0.4		$	—		$	25.6
	Accounts payable	—			212.2			32.1			(19.3		)	225
	Intercompany notes payable	—			—			6.3			(6.3		)	—
Other current liabilities	100.4			153.8			15.1			—			269.3
Total Current Liabilities	122.6			369			53.9			(25.6		)	519.9
Long-term debt	3,824.20			2.9			3.4			—			3,830.50
Intercompany payable	—			1,013.80			1.6			(1,015.4		)	—
Intercompany notes payable	—			—			178.9			(178.9		)	—
Deferred income taxes	883.8			—			31.3			—			915.1
Other liabilities	55.7			115.9			10.8			—			182.4
Total Liabilities	4,886.30			1,501.60			279.9			(1,219.9		)	5,447.90
Total Shareholders’ Equity	2,283.20			5,387.40			163.8			(5,551.2		)	2,283.20
Total Liabilities and Shareholders’ Equity	$	7,169.50		$	6,889.00		$	443.7		$	(6,771.1	)	$	7,731.10
Schedule of Condensed Cash Flow Statement [Table Text Block]	POST HOLDINGS, INC.
	CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS (Unaudited)
		Six Months Ended March 31, 2015
		Parent						Non-
		Company			Guarantors			Guarantors			Eliminations			Total
	Net Cash (Used In) Provided by Operating Activities	$	14		$	203.7		$	4.6		$	(63.9	)	$	158.4
	Cash Flows from Investing Activities
	Business acquisitions	(3.5		)	(183.2		)	(1.2		)	—			(187.9		)
	Additions to property	—			(43.7		)	(1.9		)	—			(45.6		)
	Restricted cash	—			68.4			2.7			—			71.1
	Insurance proceeds on property losses	—			1.8			—			—			1.8
	Proceeds from equity distributions	121.5			—			—			(121.5		)	—
	Capitalization of subsidiaries	(138.6		)	—			—			138.6			—
	Net receipts from intercompany revolver	0.6			—			—			(0.6		)	—
	Net Cash Provided by (Used in) Investing Activities	(20.0		)	(156.7		)	(0.4		)	16.5			(160.6		)
	Cash Flows from Financing Activities
	Proceeds from issuance of common stock	341.4			—			—			—			341.4
	Repayments of long-term debt	(11.0		)	(2.0		)	(0.2		)	—			(13.2		)
	Payment of dividend	(8.5		)	—			—			—			(8.5		)
	Payments of debt issuance costs	(3.7		)	—			—			—			(3.7		)
	Other, net	(1.7		)	—			—			—			(1.7		)
	Payments for equity distributions	—			(171.0		)	—			171			—
	Proceeds from Parent capitalization	—			128			1			(129.0		)	—
	Net payments from intercompany revolver	—			—			(0.6		)	0.6			—
	Net Cash Provided by (Used in) Financing Activities	316.5			(45.0		)	0.2			42.6			314.3
	Effect of exchange rate changes on cash and cash equivalents	—			—			(1.5		)	—			(1.5		)
	Net Increase (Decrease) in Cash and Cash Equivalents	310.5			2			2.9			(4.8		)	310.6
	Cash and Cash Equivalents, Beginning of Year	246.6			15.7			10			(3.9		)	268.4
	Cash and Cash Equivalents, End of Period	$	557.1		$	17.7		$	12.9		$	(8.7	)	$	579
		Six Months Ended March 31, 2014
		Parent						Non-
		Company			Guarantors			Guarantors			Eliminations			Total
	Net Cash (Used in) Provided by Operating Activities	$	(27.5	)	$	80.9		$	(4.7	)	$	(30.2	)	$	18.5
	Cash Flows from Investing Activities
	Business acquisitions	(751.5		)	4.7			(288.4		)	—			(1,035.2		)
	Cash advance for acquisitions	(25.0		)	—			—			—			(25.0		)
	Additions to property	—			(25.9		)	(0.8		)	—			(26.7		)
	Restricted cash	37			—			(0.7		)	—			36.3
	Proceeds from equity contributions	38.5			—			—			(38.5		)	—
	Capitalization of subsidiaries	(294.8		)	—			—			294.8			—
	Net Cash Used in Investing Activities	(995.8		)	(21.2		)	(289.9		)	256.3			(1,050.6		)
	Cash Flows from Financing Activities
	Proceeds from issuance of senior notes	875			—			—			—			875
	Proceeds from issuance of preferred stock	310.2			—			—			—			310.2
	Proceeds from issuance of common stock	303.5			—			—			—			303.5
	Payment of preferred stock dividend	(5.9		)	—			—			—			(5.9		)
	Payments of debt issuance costs	(19.8		)	—			—			—			(19.8		)
	Other, net	0.2			—			—			—			0.2
	Proceeds from parent capitalization	—			—			294.8			(294.8		)	—
	Payments for equity distributions	—			(61.4		)	—			61.4			—
	Net Cash Provided by (Used in) by Financing Activities	1,463.20			(61.4		)	294.8			(233.4		)	1,463.20
	Effect of Exchange Rate Changes on Cash	(6.7		)	—			(0.5		)	—			(7.2		)
	Net Increase (Decrease) in Cash and Cash Equivalents	433.2			(1.7		)	(0.3		)	(7.3		)	423.9
	Cash and Cash Equivalents, Beginning of Year	391.4			4.1			8.2			(1.7		)	402
	Cash and Cash Equivalents, End of Period	$	824.6		$	2.4		$	7.9		$	(9.0	)	$	825.9

Basis_of_Presentation_Details

Basis of Presentation (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Sep. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Loss on assets held for sale	$15.40	$0	$22.50	$0
Carrying value of assets held for sale	$13.90		$13.90		$16.40

Restructuring_Details

Restructuring (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Restructuring Cost and Reserve [Line Items]
Costs Incurred and Charged to Expense	$3.10	$2.20	$3.10	$5.40
Restructuring and Related Cost, Cost Incurred to Date	25.6		25.6
Restructuring and Related Cost, Expected Cost	25.6		25.6
Employee severance - Boise [Member]
Restructuring Cost and Reserve [Line Items]
Costs Incurred and Charged to Expense	3.1	0	3.1	0
Restructuring and Related Cost, Cost Incurred to Date	3.1		3.1
Restructuring and Related Cost, Expected Cost	3.1		3.1
Employee Severance - Modesto [Member]
Restructuring Cost and Reserve [Line Items]
Costs Incurred and Charged to Expense	0	0.2	0	0.7
Restructuring and Related Cost, Cost Incurred to Date	3.2		3.2
Restructuring and Related Cost, Expected Cost	3.2		3.2
Pension curtailment - Modesto [Member]
Restructuring Cost and Reserve [Line Items]
Costs Incurred and Charged to Expense	0	0	0	0
Restructuring and Related Cost, Cost Incurred to Date	1.7		1.7
Restructuring and Related Cost, Expected Cost	1.7		1.7
Accelerated depreciation - Modesto [Member]
Restructuring Cost and Reserve [Line Items]
Costs Incurred and Charged to Expense	0	2	0	4.7
Restructuring and Related Cost, Cost Incurred to Date	17.6		17.6
Restructuring and Related Cost, Expected Cost	17.6		17.6
Restructuring - Modesto [Member]
Restructuring Cost and Reserve [Line Items]
Costs Incurred and Charged to Expense	0	2.2	0	5.4
Restructuring and Related Cost, Cost Incurred to Date	22.5		22.5
Restructuring and Related Cost, Expected Cost	$22.50		$22.50

Restructuring_reserve_rollforw

Restructuring reserve rollforward (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Restructuring Liabilities Rollforward [Line Items]
30-Sep-14			$0.70
Costs Incurred and Charged to Expense	3.1	2.2	3.1	5.4
Costs Paid			-0.5
31-Mar-15	3.3		3.3
Restructuring - Boise [Member]
Restructuring Liabilities Rollforward [Line Items]
30-Sep-14			0
Costs Incurred and Charged to Expense			3.1
Costs Paid			0
31-Mar-15	3.1		3.1
Restructuring - Modesto [Member]
Restructuring Liabilities Rollforward [Line Items]
30-Sep-14			0.7
Costs Incurred and Charged to Expense	0	2.2	0	5.4
Costs Paid			-0.5
31-Mar-15	$0.20		$0.20

Business_Combinations_Details

Business Combinations (Details) (USD $)	3 Months Ended		6 Months Ended		0 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Aug. 01, 2014	Oct. 02, 2014	Nov. 01, 2014	Sep. 30, 2014	Oct. 01, 2014
Business Acquisition [Line Items]
Net Sales	$1,052.70	$438	$2,126.60	$735
Operating Profit (Loss)	49.7	-0.3	90.6	24.9
Loss on assets held for sale	15.4	0	22.5	0
Goodwill	2,943.10		2,943.10					2,886.70
Dakota Growers [Member]
Business Acquisition [Line Items]
Net Sales	68.2		133.4	66.7
Operating Profit (Loss)	8.5		13	-1.2
Dymatize [Member]
Business Acquisition [Line Items]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	17.5		17.5
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, Low	0		0
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability			0.7
Net Sales	48.1		95.1	28.2
Operating Profit (Loss)	-5.1		-9.6	-2.5
Golden Boy [Member]
Business Acquisition [Line Items]
Net Sales	98		200.5	39
Operating Profit (Loss)	-8		-4	2
Loss on assets held for sale	15.4		15.4
Michael Foods [Member]
Business Acquisition [Line Items]
Net Sales	482.1		1,016.20
Operating Profit (Loss)	31.3		68.9
Oh's Brand [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred					20.4
PowerBar and Musashi [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross						150
Business Combination, Consideration Transferred						136.1
Business Combinations, Purchase Price Adjustment, Net Working Capital Settlement			1.7
Net Sales	31.2		66.2
Operating Profit (Loss)	-8		-12.5
Restructuring and Related Cost, Incurred Cost	3.5		3.5
Cash and cash equivalents									2.4
Receivables									6.5
Inventories									23.1
Prepaid expenses and other current assets									0.1
Property									17.3
Goodwill									19.7
Other intangible assets									61.3
Deferred tax assets, noncurrent									11.7
Other assets									0
Accounts payable									-1.2
Deferred Tax Liabilities, Current									-0.8
Other current liabilities									-4.6
Deferred income taxes, noncurrent									-1.1
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net									134.4
American Blanching Company [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred							128
Cash and cash equivalents							0.6
Receivables							12.8
Inventories							15.5
Prepaid expenses and other current assets							0.4
Property							19.7
Goodwill							49.6
Other intangible assets							71.9
Deferred tax assets, noncurrent							0
Other assets							0.4
Accounts payable							-9
Deferred Tax Liabilities, Current							-0.4
Other current liabilities							-2.8
Deferred income taxes, noncurrent							-30.7
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net							128
Customer Relationships [Member] | PowerBar and Musashi [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired			21.3
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			18 years 3 months
Customer Relationships [Member] | American Blanching Company [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired			63.9
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			17 years
Trademarks [Member] | PowerBar and Musashi [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired			40
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			20 years
Trademarks [Member] | American Blanching Company [Member]
Business Acquisition [Line Items]
Finite-lived Intangible Assets Acquired			8
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life			10 years
Scenario, Previously Reported [Member]
Business Acquisition [Line Items]
Cash and cash equivalents								73.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Restricted Cash								3.4
Receivables								219.6
Business Combination, Recognized Identifiable Assets Acquired, Income Tax Receivable								62.5
Inventories								289.9
business combination, recognized identifiable assets acquired and liabilities assumed, deferred tax asset, current								5.4
Prepaid expenses and other current assets								9.3
Property								440.5
Goodwill								1,605.40
Other intangible assets								1,883.70
Other assets								9.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt								-3.7
Accounts payable								-142.6
Other current liabilities								-121.5
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt								-8.4
Deferred income taxes, noncurrent								-697.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other								-11.8
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net								3,617.50
Scenario, Adjustment [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	0		0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Restricted Cash	0		0
Receivables	-0.3		-0.3
Business Combination, Recognized Identifiable Assets Acquired, Income Tax Receivable	0		0
Inventories	0		0
business combination, recognized identifiable assets acquired and liabilities assumed, deferred tax asset, current	0.7		0.7
Prepaid expenses and other current assets	0		0
Property	0		0
Goodwill	5.2		5.2
Other intangible assets	0		0
Other assets	0		0
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt	0		0
Accounts payable	0.2		0.2
Other current liabilities	-0.3		-0.3
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt	0		0
Deferred income taxes, noncurrent	7		7
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other	-9		-9
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	3.5		3.5
Scenario, Actual [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	73.8		73.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Restricted Cash	3.4		3.4
Receivables	219.3		219.3
Business Combination, Recognized Identifiable Assets Acquired, Income Tax Receivable	62.5		62.5
Inventories	289.9		289.9
business combination, recognized identifiable assets acquired and liabilities assumed, deferred tax asset, current	6.1		6.1
Prepaid expenses and other current assets	9.3		9.3
Property	440.5		440.5
Goodwill	1,610.60		1,610.60
Other intangible assets	1,883.70		1,883.70
Other assets	9.1		9.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt	-3.7		-3.7
Accounts payable	-142.4		-142.4
Other current liabilities	-121.8		-121.8
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt	-8.4		-8.4
Deferred income taxes, noncurrent	-690.1		-690.1
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other	-20.8		-20.8
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	$3,621		$3,621

Business_combinations_pro_form

Business combinations pro forma financial information (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Business Combinations [Abstract]
Pro forma net sales	$1,052.70	$1,014.60	$2,139.10	$2,082.40
Pro forma net income (loss) available to common shareholders	$26.40	($23.90)	($70.50)	($28.50)
Pro forma basic income (loss) per share (in US$ per share)	$0.48	($0.71)	($1.35)	($0.86)
Pro forma diluted income (loss) per share (in US$ per share)	$0.45	($0.71)	($1.35)	($0.86)

Goodwill_Details

Goodwill (Details) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Sep. 30, 2014
Goodwill [Roll Forward]
Goodwill, Gross	$3,583.50	$3,527.10
Goodwill, Impaired, Accumulated Impairment Loss	-640.4	-640.4
Goodwill	2,943.10	2,886.70
Goodwill, Acquired During Period	69.3
Goodwill, Purchase Accounting Adjustments	5.2
Currency translation adjustment	-18.1
Consumer Brands Segment [Member]
Goodwill [Roll Forward]
Goodwill, Gross	1,980.40	1,950.60
Goodwill, Impaired, Accumulated Impairment Loss	-640.4	-640.4
Goodwill	1,340	1,310.20
Goodwill, Acquired During Period	19.7
Goodwill, Purchase Accounting Adjustments	10.8
Currency translation adjustment	-0.7
Michael Foods Group Segment [Member]
Goodwill [Roll Forward]
Goodwill, Gross	1,341.60	1,347.20
Goodwill, Impaired, Accumulated Impairment Loss	0	0
Goodwill	1,341.60	1,347.20
Goodwill, Acquired During Period	0
Goodwill, Purchase Accounting Adjustments	-5.6
Currency translation adjustment	0
Private Label Segment [Member]
Goodwill [Roll Forward]
Goodwill, Gross	261.5	229.3
Goodwill, Impaired, Accumulated Impairment Loss	0	0
Goodwill	261.5	229.3
Goodwill, Acquired During Period	49.6
Goodwill, Purchase Accounting Adjustments	0
Currency translation adjustment	($17.40)

Income_Taxes_Details

Income Taxes (Details)	3 Months Ended	6 Months Ended
	Mar. 31, 2015	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Effective Income Tax Rate, Percent	178.40%	40.70%

Intangible_Assets_net_Details

Intangible Assets, net (Details) (USD $)	Mar. 31, 2015	Sep. 30, 2014
In Millions, unless otherwise specified
Finite-Lived Intangible Assets [Abstract]
Finite-Lived Intangible Assets, Gross	$2,448.50	$2,323.10
Finite-Lived Intangible Assets, Accumulated Amortization	-203.8	-137.8
Finite-Lived Intangible Assets, Net	2,244.70	2,185.30
Intangible Assets, Net (Excluding Goodwill) [Abstract]
Carrying amount, total	2,898	2,780.80
Other intangible assets, net	2,694.20	2,643
Trademarks [Member]
Indefinite-Lived Intangible Assets (Excluding Goodwill) [Abstract]
Carrying amount	449.5	457.7
Customer Relationships [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-Lived Intangible Assets, Gross	1,818.70	1,743.70
Finite-Lived Intangible Assets, Accumulated Amortization	-139.8	-90.9
Finite-Lived Intangible Assets, Net	1,678.90	1,652.80
Trademarks [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-Lived Intangible Assets, Gross	607.5	554.7
Finite-Lived Intangible Assets, Accumulated Amortization	-59.7	-43.9
Finite-Lived Intangible Assets, Net	547.8	510.8
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Abstract]
Finite-Lived Intangible Assets, Gross	22.3	24.7
Finite-Lived Intangible Assets, Accumulated Amortization	-4.3	-3
Finite-Lived Intangible Assets, Net	$18	$21.70

Earnings_Loss_Per_Share_Detail

Earnings (Loss) Per Share (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net Earnings (Loss) Available to Common Shareholders	$26.30	($22.60)	($75.30)	($27.60)
Net Loss	$30.50	($18.30)	($66.80)	($20.70)
Weighted Average Number of Shares Outstanding, Basic and Diluted	49,600,000	33,600,000	47,200,000	33,100,000
Dilutive Securities, Effect on Basic Earnings Per Share	4,900,000	0	4,900,000	0
Weighted-average shares for basic earnings per share	54,500,000	33,600,000	52,100,000	33,100,000
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	13,100,000	0	0	0
Weighted-average shares for diluted earnings per share	67,600,000	33,600,000	52,100,000	33,100,000
Basic earnings per share (in usd per share)	$0.48	($0.67)	($1.45)	($0.83)
Diluted earnings per share (in usd per share)	$0.45	($0.67)	($1.45)	($0.83)
Employee Stock Option [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	600,000	0	0	0
Stock Appreciation Rights (SARs) [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	100,000	0	0	0
Restricted Stock [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	300,000	0	0	0
Tangible Equity Units [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	1,100,000	0	0	0
Preferred Stock [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	11,000,000	0	0	0
Minimum [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Tangible Equity Unit, Equity Component, Settlement Rate per Unit			1.7114
Maximum [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Tangible Equity Unit, Equity Component, Settlement Rate per Unit			2.0964

Earnings_Loss_Per_Share_Antidi

Earnings (Loss) Per Share Antidilutive shares excluded from earnings per share (Details)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Stock Appreciation Rights (SARs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1.4	3.8	5.4	3.8
Preferred Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		11	11	11
Tangible Equity Units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			1.1

Inventories_Details

Inventories (Details) (USD $)	Mar. 31, 2015	Sep. 30, 2014
In Millions, unless otherwise specified
Inventory [Abstract]
Raw materials and supplies	$130.50	$99.20
Work in process	14.3	16.3
Finished products	288.8	235.8
Flocks	28.3	29.4
Inventories	$461.90	$380.70

Property_net_Details

Property, net (Details) (USD $)	Mar. 31, 2015	Sep. 30, 2014
In Millions, unless otherwise specified
Property, Plant and Equipment [Abstract]
Property, at cost	$1,170.80	$1,121
Accumulated depreciation	-343.4	-289.1
Property, net	$827.40	$831.90

Derivative_Financial_Instrumen2

Derivative Financial Instruments and Hedging (Details) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Sep. 30, 2014
Derivatives, Fair Value
Derivative, Remaining Maturity	12 months
Derivative Liability, Current	($132.70)	($52)
Derivative Assets	0.3	0
Other Current Assets [Member]
Derivatives, Fair Value
Derivative Asset, Fair Value, Gross Liability	-0.1
Derivative Assets (Liabilities), at Fair Value, Net	0.3
Derivative Asset, Fair Value, Gross Asset	0.4
Total Liabilities [Member]
Derivatives, Fair Value
Derivative Liability, Current	-132.8	-52
Derivative Liability, Fair Value, Gross Asset	-0.1
Derivative Assets (Liabilities), at Fair Value, Net	132.7	52
Derivative Asset, Fair Value, Gross Asset		0
Interest rate swap, rate lock swaps [Member]
Derivatives, Fair Value
Derivative, Notional Amount	750
Derivative, Fixed Interest Rate	4.00%
Commodity Contract [Member]
Derivatives, Fair Value
Derivative, Notional Amount	43.1
Commodity Contract [Member] | Other Current Assets [Member]
Derivatives, Fair Value
Derivative Asset, Fair Value, Gross Liability	-0.1
Derivative Assets (Liabilities), at Fair Value, Net	0.1
Derivative Asset, Fair Value, Gross Asset	0.2
Commodity Contract [Member] | Other Assets [Member]
Derivatives, Fair Value
Derivative Liability, Current	-1.3	-8
Derivative Liability, Fair Value, Gross Asset	-0.1
Derivative Assets (Liabilities), at Fair Value, Net	1.2	8
Derivative Asset, Fair Value, Gross Asset		0
Future [Member]
Derivatives, Fair Value
Derivative, Notional Amount	32
Future [Member] | Other Assets [Member]
Derivatives, Fair Value
Derivative Liability, Current	-6.9	-0.9
Derivative Liability, Fair Value, Gross Asset	0
Derivative Assets (Liabilities), at Fair Value, Net	6.9	0.9
Derivative Asset, Fair Value, Gross Asset		0
Interest Rate Swap [Member]
Derivatives, Fair Value
Derivative, Notional Amount	869.5
Interest Rate Swap [Member] | Other Assets [Member]
Derivatives, Fair Value
Derivative Liability, Current	-0.8	-2.7
Derivative Liability, Fair Value, Gross Asset	0
Derivative Assets (Liabilities), at Fair Value, Net	0.8	2.7
Derivative Asset, Fair Value, Gross Asset		0
Interest Rate Swap [Member] | Other Noncurrent Liabilities [Member]
Derivatives, Fair Value
Derivative Liability, Current	-123.8	-40.4
Derivative Liability, Fair Value, Gross Asset	0
Derivative Assets (Liabilities), at Fair Value, Net	123.8	40.4
Derivative Asset, Fair Value, Gross Asset		0
Michael Foods [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value
Derivative, Notional Amount	300
Future [Member] | Other Current Assets [Member]
Derivatives, Fair Value
Derivative Asset, Fair Value, Gross Liability	0
Derivative Assets (Liabilities), at Fair Value, Net	0.2
Derivative Asset, Fair Value, Gross Asset	$0.20

Derivative_Financial_Instrumen3

Derivative Financial Instruments and Hedging Gain(Loss) recognized in earnings from derivative instruments (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Commodity Contract [Member] | Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	$0.20	$0.80	$8.40	$1
Natural Gas Futures [Member] | Cost of Sales [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	4.9	-0.2	-3.6	0.5
Foreign Exchange Contract [Member] | Selling, General and Administrative Expenses [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	0	-5.6	0	-6.3
Interest Rate Swap [Member] | Operating Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	($28.80)	$0	($83.40)	$0

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (USD $)	Mar. 31, 2015	Sep. 30, 2014
In Millions, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Deferred Compensation Plan Assets	$11.30	$10.20
Derivative instruments	0.3	0
Assets, Fair Value Disclosure	11.6	10.2
Deferred compensation liabilities	15.8	12.3
Derivative Liability, Current	132.7	52
Other Liabilities, Fair Value Disclosure	148.5	64.3
Long-term Debt, Fair Value	3,825.30	3,670.60
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Deferred Compensation Plan Assets	11.3	10.2
Derivative instruments	0	0
Assets, Fair Value Disclosure	11.3	10.2
Deferred compensation liabilities	0	0
Derivative Liability, Current	0	0
Other Liabilities, Fair Value Disclosure	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Deferred Compensation Plan Assets	0	0
Derivative instruments	0.3	0
Assets, Fair Value Disclosure	0.3	0
Deferred compensation liabilities	15.8	12.3
Derivative Liability, Current	132.7	52
Other Liabilities, Fair Value Disclosure	148.5	64.3
Senior Notes [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Long-term Debt, Fair Value	2,914.80	2,768.20
Term Loan [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Long-term Debt, Fair Value	880.2	872.9
TEUs [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Long-term Debt, Fair Value	30.3	29.5
Other Current Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivative Asset, Fair Value, Gross Asset	0.4
Commodity Contract [Member] | Other Current Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Derivative Asset, Fair Value, Gross Asset	$0.20

Shareholders_Equity_Details

Shareholders' Equity (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, except Share data in Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Feb. 02, 2015
Stockholders' Equity Note [Abstract]
Shares of common stock					7,475
Common stock, par value					$0.01
Share price					$47.50
Proceeds from issuance of common stock			$341.40	$303.50
Payments of share issuance costs			13.7
Reclassifications of of accumulated other comprehensive income, pension and postretirement benefits	$0.30	($0.30)	$0.50	($0.50)

LongTerm_Debt_Details

Long-Term Debt (Details) (USD $)	6 Months Ended	0 Months Ended
	Mar. 31, 2015	4-May-15	Sep. 30, 2014	3-May-15
Debt Instrument
Secured Debt, Other	$3,900,000		$4,800,000
Secured Debt	0		1,100,000
Capital Lease Obligations	3,100,000		3,800,000
Long-term Debt	3,797,200,000		3,810,900,000
Long-term Debt	885,000,000
Debt Issuance Cost	3,700,000
Current portion of long-term debt	-24,900,000		-25,600,000
Plus: Unamortized premium (discount), net	42,800,000		45,200,000
Total long-term debt	3,815,100,000		3,830,500,000
Line of Credit Facility, Maximum Borrowing Capacity	400,000,000
Letters of Credit Outstanding, Amount	500,000
Line of Credit Facility, Remaining Borrowing Capacity	399,500,000
Debt Covenant, Leverage Ratio	3
Debt covenant, interest coverage ratio	1.75
Debt Covenant, Maximum Undischarged Judgments	60,000,000
7.375% Senior Notes [Member]
Debt Instrument
Senior Notes	1,375,000,000		1,375,000,000
6.75% Senior Notes [Member]
Debt Instrument
Senior Notes	875,000,000		875,000,000
6.00% Senior Notes [Member]
Debt Instrument
Senior Notes	630,000,000		630,000,000
Term Loan [Member]
Debt Instrument
Loans Payable to Bank	878,400,000		882,800,000
Tangible Equity Units Debt Component [Member]
Debt Instrument
Tangible Equity Units, Debt Component	31,800,000		38,400,000
Subsequent Event [Member]
Debt Instrument
New Term Loan				700,000,000
Debt covenant, interest coverage ratio		2
Debt Covenant, Maximum Undischarged Judgments				$75,000,000

Pension_and_Other_Postretireme2

Pension and Other Postretirement Benefits - Components of Net Periodic Benefit Cost (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Pension Benefits
Components of net periodic benefit cost [Abstract]
Service cost	$0.90	$0.90	$1.90	$1.80
Interest cost	0.5	0.6	1.1	1.1
Expected return on plan assets	-0.5	-0.6	-1.2	-1.1
Recognized net actuarial loss	0.2	0.2	0.4	0.4
Recognized prior service cost	0.1	0.1	0.2	0.2
Net periodic benefit cost	1.2	1.2	2.4	2.4
Other Benefits
Components of net periodic benefit cost [Abstract]
Service cost	0.5	0.5	1	1
Interest cost	1.2	1.2	2.4	2.3
Recognized net actuarial loss	0.3	0.1	0.7	0.2
Recognized prior service cost	-0.4	-0.6	-0.8	-1.2
Net periodic benefit cost	$1.60	$1.20	$3.30	$2.30

Segments_Details

Segments (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Sep. 30, 2014
Segment Reporting Information [Line Items]
Net Sales	$1,052.70	$438	$2,126.60	$735
Accelerated depreciation on plant closure	0	2	0	4.7
Losses on hedge of purchase price of foreign currency denominated acquisition	-2.7	-11.9	-3.9	-13.5
Loss on assets held for sale	15.4	0	22.5	0
Interest expense (income), net	59.8	37.3	119.9	66.3
Other expense, net	28.8	0	83.4	0
Loss before income taxes	-38.9	-37.6	-112.7	-41.4
Depreciation and amortization	63.2	30.1	126.3	51.2
Assets	8,015.20		8,015.20		7,731.10
Consumer Brands Segment [Member]
Segment Reporting Information [Line Items]
Net Sales	378.5	310.1	726.4	584.2
Segment Profit	46.3	38.6	77.6	86
Depreciation and amortization	18.9	17	38	31.8
Assets	3,071.40		3,071.40		2,932.20
Michael Foods Group Segment [Member]
Segment Reporting Information [Line Items]
Net Sales	550.3	66.7	1,149.60	66.7
Segment Profit	39.8	-1.2	81.9	-1.2
Depreciation and amortization	36.5	5.2	73.1	5.2
Assets	3,601.80		3,601.80		3,726.50
Private Label Segment [Member]
Segment Reporting Information [Line Items]
Net Sales	124.9	61.2	252.7	84.4
Segment Profit	10.4	3.9	17.3	6.5
Depreciation and amortization	6.5	3.8	12.5	5.6
Assets	663.5		663.5		558.6
Total Segment [Member]
Segment Reporting Information [Line Items]
Segment Profit	96.5	41.3	176.8	91.3
Depreciation and amortization	61.9	26	123.6	42.6
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Net Sales	-1	0	-2.1	-0.3
Corporate Segment [Member]
Segment Reporting Information [Line Items]
Other Expenses	31.4	27.8	63.7	48.6
Losses on hedge of purchase price of foreign currency denominated acquisition	0	11.8	0	13.1
Depreciation and amortization	1.3	2.1	2.7	3.9
Assets	$678.50		$678.50		$513.80

Condensed_Consolidating_Financ2

Condensed Consolidating Financial Statements of Guarantors - Combined Statements of Operations (Condensed) (Details) (USD $)	3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Condensed Financial Statements, Captions [Line Items]
Net Sales	$1,052.70	$438	$2,126.60	$735
Cost of goods sold	777.2	308.6	1,602	491.1
Gross Profit	275.5	129.4	524.6	243.9
Selling, general and administrative expenses	173.7	105	339.7	186.9
Amortization of intangible assets	33.7	12.7	67.2	18.4
Loss on foreign currency	2.7	11.9	3.9	13.5
Other operating expenses, net	15.7	0.1	23.2	0.2
Operating Profit (Loss)	49.7	-0.3	90.6	24.9
Interest expense (income), net	59.8	37.3	119.9	66.3
Other expense, net	28.8	0	83.4	0
(Loss) Earnings before Income Taxes	-38.9	-37.6	-112.7	-41.4
Income tax benefit	-69.4	-19.3	-45.9	-20.7
Net Earnings (Loss) before Equity in Subsidiaries	30.5	-18.3	-66.8	-20.7
Equity (loss) earnings in subsidiaries	0	0	0	0
Net Earnings (Loss)	30.5	-18.3	-66.8	-20.7
Total Comprehensive Income (Loss)	4.1	-17.8	-107.1	-22.5
Parent Company
Condensed Financial Statements, Captions [Line Items]
Net Sales	0	0	0	0
Cost of goods sold	0	0	0	0
Gross Profit	0	0	0	0
Selling, general and administrative expenses	4.3	3.7	7.4	6.9
Amortization of intangible assets	0	0	0	0
Loss on foreign currency	1	11.8	1.4	13.1
Other operating expenses, net	0	0	0	0
Operating Profit (Loss)	-5.3	-15.5	-8.8	-20
Interest expense (income), net	56.9	35.4	114	64.4
Other expense, net	28.8		83.4
(Loss) Earnings before Income Taxes	-91	-50.9	-206.2	-84.4
Income tax benefit	-121.9	-30.1	-84	-42
Net Earnings (Loss) before Equity in Subsidiaries	30.9	-20.8	-122.2	-42.4
Equity (loss) earnings in subsidiaries	-0.4	2.5	55.4	21.7
Net Earnings (Loss)	30.5	-18.3	-66.8	-20.7
Total Comprehensive Income (Loss)	4.1	-17.8	-107.1	-22.5
Guarantors
Condensed Financial Statements, Captions [Line Items]
Net Sales	957.6	390.1	1,918.50	674.9
Cost of goods sold	699.8	267.8	1,428.70	441.9
Gross Profit	257.8	122.3	489.8	233
Selling, general and administrative expenses	156	96.6	305	171.4
Amortization of intangible assets	31.3	10.9	62.1	16.6
Loss on foreign currency	1.6	0.1	2.5	0.4
Other operating expenses, net	15.5	0.1	23	0.2
Operating Profit (Loss)	53.4	14.6	97.2	44.4
Interest Income (Expense), Nonoperating, Net	-0.2	0	-0.5	0
Other expense, net	0		0
(Loss) Earnings before Income Taxes	53.6	14.6	97.7	44.4
Income tax benefit	52.5	11.1	38.6	21.6
Net Earnings (Loss) before Equity in Subsidiaries	1.1	3.5	59.1	22.8
Equity (loss) earnings in subsidiaries	-0.6	0	-1.1	0
Net Earnings (Loss)	0.5	3.5	58	22.8
Total Comprehensive Income (Loss)	0.8	3.3	58.5	22.5
Non-Guarantors
Condensed Financial Statements, Captions [Line Items]
Net Sales	106	51.2	229.4	70.8
Cost of goods sold	88.3	44.1	194.6	59.9
Gross Profit	17.7	7.1	34.8	10.9
Selling, general and administrative expenses	13.4	4.7	27.3	8.6
Amortization of intangible assets	2.4	1.8	5.1	1.8
Loss on foreign currency	0.1	0	0	0
Other operating expenses, net	0.2	0	0.2	0
Operating Profit (Loss)	1.6	0.6	2.2	0.5
Interest expense (income), net	3.1	1.9	6.4	1.9
Other expense, net	0		0
(Loss) Earnings before Income Taxes	-1.5	-1.3	-4.2	-1.4
Income tax benefit	0	-0.3	-0.5	-0.3
Net Earnings (Loss) before Equity in Subsidiaries	-1.5	-1	-3.7	-1.1
Equity (loss) earnings in subsidiaries	0	0	0	0
Net Earnings (Loss)	-1.5	-1	-3.7	-1.1
Total Comprehensive Income (Loss)	-14.7	-0.3	-23.9	-2.6
Eliminations
Condensed Financial Statements, Captions [Line Items]
Net Sales	-10.9	-3.3	-21.3	-10.7
Cost of goods sold	-10.9	-3.3	-21.3	-10.7
Gross Profit	0	0	0	0
Selling, general and administrative expenses	0	0	0	0
Amortization of intangible assets	0	0	0	0
Loss on foreign currency	0	0	0	0
Other operating expenses, net	0	0	0	0
Operating Profit (Loss)	0		0	0
Interest expense (income), net	0	0	0	0
Other expense, net	0		0
(Loss) Earnings before Income Taxes	0	0	0	0
Income tax benefit	0	0	0	0
Net Earnings (Loss) before Equity in Subsidiaries	0	0	0	0
Equity (loss) earnings in subsidiaries	1	-2.5	-54.3	-21.7
Net Earnings (Loss)	1	-2.5	-54.3	-21.7
Total Comprehensive Income (Loss)	$13.90	($3)	($34.60)	($19.90)

Condensed_Consolidating_Financ3

Condensed Consolidating Financial Statements of Guarantors - Consolidated Balance Sheets (Condensed) (Details) (USD $)	Mar. 31, 2015	Sep. 30, 2014	Mar. 31, 2014	Sep. 30, 2013
In Millions, unless otherwise specified
Assets, Current [Abstract]
Cash and cash equivalents	$579	$268.40	$825.90	$402
Restricted cash	13.6	84.8
Receivables, net	348.7	413.7
Inventories	461.9	380.7
Deferred income taxes	22.8	27
Intercompany notes receivable	0	0
Prepaid expenses and other current assets	49.2	44.4
Total Current Assets	1,475.20	1,219
Assets, Noncurrent [Abstract]
Property, net	827.4	831.9
Goodwill	2,943.10	2,886.70
Other intangible assets, net	2,694.20	2,643
Intercompany receivable	0	0
Intercompany notes receivable	0	0
Investment in subsidiaries	0	0
Other assets	75.3	150.5
Total Assets	8,015.20	7,731.10
Liabilities, Current [Abstract]
Current portion of long-term debt	24.9	25.6
Accounts payable	229.3	225
Intercompany notes payable	0	0
Other current liabilities	282.9	269.3
Total Current Liabilities	537.1	519.9
Liabilities, Noncurrent [Abstract]
Long-term debt	3,815.10	3,830.50
Intercompany payable	0	0
Intercompany notes payable	0	0
Deferred income taxes	859.2	915.1
Other liabilities	279.9	182.4
Total Liabilities	5,491.30	5,447.90
Total Shareholders’ Equity	2,523.90	2,283.20
Total Liabilities and Shareholders’ Equity	8,015.20	7,731.10
Parent Company
Assets, Current [Abstract]
Cash and cash equivalents	557.1	246.6	824.6	391.4
Restricted cash	1.1	1.1
Receivables, net	6.5	78
Inventories	0	0
Deferred income taxes	22.8	27
Intercompany notes receivable	6.2	6.3
Prepaid expenses and other current assets	14.6	11.4
Total Current Assets	608.3	370.4
Assets, Noncurrent [Abstract]
Property, net	0	0
Goodwill	0	0
Other intangible assets, net	0	0
Intercompany receivable	1,060.90	1,015.40
Intercompany notes receivable	157.9	178.9
Investment in subsidiaries	5,558.70	5,543.10
Other assets	60.4	61.7
Total Assets	7,446.20	7,169.50
Liabilities, Current [Abstract]
Current portion of long-term debt	22.5	22.2
Accounts payable	0	0
Intercompany notes payable	0	0
Other current liabilities	107.1	100.4
Total Current Liabilities	129.6	122.6
Liabilities, Noncurrent [Abstract]
Long-term debt	3,810.40	3,824.20
Intercompany payable	0	0
Intercompany notes payable	0	0
Deferred income taxes	831.9	883.8
Other liabilities	150.4	55.7
Total Liabilities	4,922.30	4,886.30
Total Shareholders’ Equity	2,523.90	2,283.20
Total Liabilities and Shareholders’ Equity	7,446.20	7,169.50
Guarantors
Assets, Current [Abstract]
Cash and cash equivalents	17.7	15.7	2.4	4.1
Restricted cash	11.4	79.8
Receivables, net	306.6	305.2
Inventories	407.9	336.5
Deferred income taxes	0	0
Intercompany notes receivable	0	0
Prepaid expenses and other current assets	33.4	30.4
Total Current Assets	777	767.6
Assets, Noncurrent [Abstract]
Property, net	775	775.9
Goodwill	2,807.30	2,732.80
Other intangible assets, net	2,586.10	2,518.50
Intercompany receivable	0	0
Intercompany notes receivable	0	0
Investment in subsidiaries	23.7	8.1
Other assets	13.2	86.1
Total Assets	6,982.30	6,889
Liabilities, Current [Abstract]
Current portion of long-term debt	2	3
Accounts payable	215	212.2
Intercompany notes payable	0	0
Other current liabilities	160	153.8
Total Current Liabilities	377	369
Liabilities, Noncurrent [Abstract]
Long-term debt	1.9	2.9
Intercompany payable	1,058.90	1,013.80
Intercompany notes payable	0	0
Deferred income taxes	0	0
Other liabilities	119.6	115.9
Total Liabilities	1,557.40	1,501.60
Total Shareholders’ Equity	5,424.90	5,387.40
Total Liabilities and Shareholders’ Equity	6,982.30	6,889
Non-Guarantors
Assets, Current [Abstract]
Cash and cash equivalents	12.9	10	7.9	8.2
Restricted cash	1.1	3.9
Receivables, net	46	45.9
Inventories	54	44.2
Deferred income taxes	0	0
Intercompany notes receivable	0	0
Prepaid expenses and other current assets	1.2	2.6
Total Current Assets	115.2	106.6
Assets, Noncurrent [Abstract]
Property, net	52.4	56
Goodwill	135.8	153.9
Other intangible assets, net	108.1	124.5
Intercompany receivable	0	0
Intercompany notes receivable	0	0
Investment in subsidiaries	0	0
Other assets	1.7	2.7
Total Assets	413.2	443.7
Liabilities, Current [Abstract]
Current portion of long-term debt	0.4	0.4
Accounts payable	33.4	32.1
Intercompany notes payable	6.2	6.3
Other current liabilities	15.8	15.1
Total Current Liabilities	55.8	53.9
Liabilities, Noncurrent [Abstract]
Long-term debt	2.8	3.4
Intercompany payable	2	1.6
Intercompany notes payable	157.9	178.9
Deferred income taxes	27.3	31.3
Other liabilities	9.9	10.8
Total Liabilities	255.7	279.9
Total Shareholders’ Equity	157.5	163.8
Total Liabilities and Shareholders’ Equity	413.2	443.7
Eliminations
Assets, Current [Abstract]
Cash and cash equivalents	-8.7	-3.9	-9	-1.7
Restricted cash	0	0
Receivables, net	-10.4	-15.4
Inventories	0	0
Deferred income taxes	0	0
Intercompany notes receivable	-6.2	-6.3
Prepaid expenses and other current assets	0	0
Total Current Assets	-25.3	-25.6
Assets, Noncurrent [Abstract]
Property, net	0	0
Goodwill	0	0
Other intangible assets, net	0	0
Intercompany receivable	-1,060.90	-1,015.40
Intercompany notes receivable	-157.9	-178.9
Investment in subsidiaries	-5,582.40	-5,551.20
Other assets	0	0
Total Assets	-6,826.50	-6,771.10
Liabilities, Current [Abstract]
Current portion of long-term debt	0	0
Accounts payable	-19.1	-19.3
Intercompany notes payable	-6.2	-6.3
Other current liabilities	0	0
Total Current Liabilities	-25.3	-25.6
Liabilities, Noncurrent [Abstract]
Long-term debt	0	0
Intercompany payable	-1,060.90	-1,015.40
Intercompany notes payable	-157.9	-178.9
Deferred income taxes	0	0
Other liabilities	0	0
Total Liabilities	-1,244.10	-1,219.90
Total Shareholders’ Equity	-5,582.40	-5,551.20
Total Liabilities and Shareholders’ Equity	($6,826.50)	($6,771.10)

Condensed_Consolidating_Financ4

Condensed Consolidating Financial Statements of Guarantors - Consolidated Statements of Cash Flows (Details) (USD $)	6 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Cash Flows from Operating Activities:
Net Cash Provided by (Used in) Operating Activities	$158.40	$18.50
Cash Flows from Investing Activities:
Business acquisitions, net of cash acquired	-187.9	-1,035.20
Cash advance for acquisitions	0	-25
Additions to property	-45.6	-26.7
Restricted cash	71.1	36.3
Insurance proceeds on property losses	1.8	0
Proceeds from equity contributions	0	0
Capitalization of subsidiaries	0	0
Net receipts from intercompany revolver	0
Net Cash Used by Investing Activities	-160.6	-1,050.60
Cash Flows from Financing Activities:
Proceeds from issuance of senior notes	0	875
Proceeds from issuance of preferred stock, net of issuance costs	0	310.2
Proceeds from issuance of common stock	341.4	303.5
Repayments of long-term debt	-13.2	0
Payment of preferred stock dividend	-8.5	-5.9
Payments of Debt Issuance Costs	3.7	19.8
Other, net	-1.7	0.2
Payments for equity distributions	0	0
Proceeds from Parent capitalization	0	0
Net payments from intercompany revolver	0
Net Cash Provided by Financing Activities	314.3	1,463.20
Effect of exchange rate changes on cash	-1.5	-7.2
Net Increase in Cash and Cash Equivalents	310.6	423.9
Cash and Cash Equivalents, Beginning of Year	268.4	402
Cash and Cash Equivalents, End of Period	579	825.9
Parent Company
Cash Flows from Operating Activities:
Net Cash Provided by (Used in) Operating Activities	14	-27.5
Cash Flows from Investing Activities:
Business acquisitions, net of cash acquired	-3.5	-751.5
Cash advance for acquisitions		-25
Additions to property	0	0
Restricted cash	0	37
Insurance proceeds on property losses	0
Proceeds from equity contributions	121.5	38.5
Capitalization of subsidiaries	-138.6	-294.8
Net receipts from intercompany revolver	0.6
Net Cash Used by Investing Activities	-20	-995.8
Cash Flows from Financing Activities:
Proceeds from issuance of senior notes		875
Proceeds from issuance of preferred stock, net of issuance costs		310.2
Proceeds from issuance of common stock	341.4	303.5
Repayments of long-term debt	-11
Payment of preferred stock dividend	-8.5	-5.9
Payments of Debt Issuance Costs	3.7	19.8
Other, net	-1.7	0.2
Payments for equity distributions	0	0
Proceeds from Parent capitalization	0	0
Net payments from intercompany revolver	0
Net Cash Provided by Financing Activities	316.5	1,463.20
Effect of exchange rate changes on cash	0	-6.7
Net Increase in Cash and Cash Equivalents	310.5	433.2
Cash and Cash Equivalents, Beginning of Year	246.6	391.4
Cash and Cash Equivalents, End of Period	557.1	824.6
Guarantors
Cash Flows from Operating Activities:
Net Cash Provided by (Used in) Operating Activities	203.7	80.9
Cash Flows from Investing Activities:
Business acquisitions, net of cash acquired	-183.2	4.7
Cash advance for acquisitions		0
Additions to property	-43.7	-25.9
Restricted cash	68.4	0
Insurance proceeds on property losses	1.8
Proceeds from equity contributions	0	0
Capitalization of subsidiaries	0	0
Net receipts from intercompany revolver	0
Net Cash Used by Investing Activities	-156.7	-21.2
Cash Flows from Financing Activities:
Proceeds from issuance of senior notes		0
Proceeds from issuance of preferred stock, net of issuance costs		0
Proceeds from issuance of common stock	0	0
Repayments of long-term debt	-2
Payment of preferred stock dividend	0	0
Payments of Debt Issuance Costs	0	0
Other, net	0	0
Payments for equity distributions	-171	-61.4
Proceeds from Parent capitalization	128	0
Net payments from intercompany revolver	0
Net Cash Provided by Financing Activities	-45	-61.4
Effect of exchange rate changes on cash	0	0
Net Increase in Cash and Cash Equivalents	2	-1.7
Cash and Cash Equivalents, Beginning of Year	15.7	4.1
Cash and Cash Equivalents, End of Period	17.7	2.4
Non-Guarantors
Cash Flows from Operating Activities:
Net Cash Provided by (Used in) Operating Activities	4.6	-4.7
Cash Flows from Investing Activities:
Business acquisitions, net of cash acquired	-1.2	-288.4
Cash advance for acquisitions		0
Additions to property	-1.9	-0.8
Restricted cash	2.7	-0.7
Insurance proceeds on property losses	0
Proceeds from equity contributions	0	0
Capitalization of subsidiaries	0	0
Net receipts from intercompany revolver	0
Net Cash Used by Investing Activities	-0.4	-289.9
Cash Flows from Financing Activities:
Proceeds from issuance of senior notes		0
Proceeds from issuance of preferred stock, net of issuance costs		0
Proceeds from issuance of common stock	0	0
Repayments of long-term debt	-0.2
Payment of preferred stock dividend	0	0
Payments of Debt Issuance Costs	0	0
Other, net	0	0
Payments for equity distributions	0	0
Proceeds from Parent capitalization	1	294.8
Net payments from intercompany revolver	-0.6
Net Cash Provided by Financing Activities	0.2	294.8
Effect of exchange rate changes on cash	-1.5	-0.5
Net Increase in Cash and Cash Equivalents	2.9	-0.3
Cash and Cash Equivalents, Beginning of Year	10	8.2
Cash and Cash Equivalents, End of Period	12.9	7.9
Eliminations
Cash Flows from Operating Activities:
Net Cash Provided by (Used in) Operating Activities	-63.9	-30.2
Cash Flows from Investing Activities:
Business acquisitions, net of cash acquired	0	0
Cash advance for acquisitions		0
Additions to property	0	0
Restricted cash	0	0
Insurance proceeds on property losses	0
Proceeds from equity contributions	-121.5	-38.5
Capitalization of subsidiaries	138.6	294.8
Net receipts from intercompany revolver	-0.6
Net Cash Used by Investing Activities	16.5	256.3
Cash Flows from Financing Activities:
Proceeds from issuance of senior notes		0
Proceeds from issuance of preferred stock, net of issuance costs		0
Proceeds from issuance of common stock	0	0
Repayments of long-term debt	0
Payment of preferred stock dividend	0	0
Payments of Debt Issuance Costs	0	0
Other, net	0	0
Payments for equity distributions	171	61.4
Proceeds from Parent capitalization	-129	-294.8
Net payments from intercompany revolver	0.6
Net Cash Provided by Financing Activities	42.6	-233.4
Effect of exchange rate changes on cash	0	0
Net Increase in Cash and Cash Equivalents	-4.8	-7.3
Cash and Cash Equivalents, Beginning of Year	-3.9	-1.7
Cash and Cash Equivalents, End of Period	($8.70)	($9)

Condensed_Consolidating_Financ5

Condensed Consolidating Financial Statements of Guarantors Narrative (Details) (USD $)	Mar. 31, 2015	Sep. 30, 2014
In Millions, unless otherwise specified
7.375% Senior Notes [Member]
Guarantor Obligations [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.38%
Senior Notes	$1,375	$1,375
6.75% Senior Notes [Member]
Guarantor Obligations [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.75%
Senior Notes	875	875
6.00% Senior Notes [Member]
Guarantor Obligations [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.00%
Senior Notes	630	630
Subsequent Issuance [Member] | 7.375% Senior Notes [Member]
Guarantor Obligations [Line Items]
Debt Instrument, Face Amount	775
Subsequent Issuance [Member] | 6.75% Senior Notes [Member]
Guarantor Obligations [Line Items]
Debt Instrument, Face Amount	$525

Subsequent_Events_Details

Subsequent Events (Details) (Subsequent Event [Member], USD $)	0 Months Ended
In Millions, except Per Share data, unless otherwise specified	4-May-15	Apr. 16, 2015	3-May-15
Subsequent Event [Line Items]
Payments to Acquire Businesses, Gross	$1,150
New Term Loan			$700
Shares Issued	2.4
Series B Preferred Stock [Member]
Subsequent Event [Line Items]
Preferred Stock, Dividend Rate, Per-Dollar-Amount		$0.94
Preferred Stock, Dividend Rate, Percentage		3.75%
Series C Preferred Stock [Member]
Subsequent Event [Line Items]
Preferred Stock, Dividend Rate, Per-Dollar-Amount		$0.63
Preferred Stock, Dividend Rate, Percentage		2.50%