Rocket Companies 8-K 7 Feb 14 2013 FY Other Events Financial data

Document_and_Entity_Informatio

Document and Entity Information Document	12 Months Ended
	Sep. 30, 2013
Entity Information [Line Items]	'
Document Type	'8-K
Amendment Flag	'false
Document Period End Date	30-Sep-13
Document Fiscal Year Focus	'2013
Document Fiscal Period Focus	'FY
Trading Symbol	'RKT
Entity Registrant Name	'Rock-Tenn CO
Entity Central Index Key	'0000230498

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended								12 Months Ended
In Millions, except Per Share data, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Net sales	$2,485.10	$2,448.30	$2,324.90	$2,287.10	$2,353.80	$2,303.20	$2,282.90	$2,267.70	$9,545.40	$9,207.60	$5,399.60
Cost of goods sold	'	'	'	'	'	'	'	'	7,698.90	7,674.90	4,407.70
Gross profit	555.1	496.7	385.2	409.5	419.9	359.8	360.8	392.2	1,846.50	1,532.70	991.9
Selling, general and administrative expenses	'	'	'	'	'	'	'	'	954.3	927.5	541.2
Restructuring and other costs, net	26	23.5	12.4	16.1	23.1	13.7	28.1	10.3	78	75.2	93.3
Operating profit	'	'	'	'	'	'	'	'	814.2	530	357.4
Interest expense	'	'	'	'	'	'	'	'	-106.9	-119.7	-88.9
Loss on extinguishment of debt	0	0	-0.1	-0.2	-6.3	-0.1	-19.5	0	-0.3	-25.9	-39.5
Interest income and other (expense) income, net	'	'	'	'	'	'	'	'	-0.9	1.3	-15
Equity in income of unconsolidated entities	'	'	'	'	'	'	'	'	4.6	3.4	1.5
Income before income taxes	256.8	203.1	109.1	141.7	120.8	90.6	53.3	124.4	710.7	389.1	215.5
Income tax benefit (expense)	'	'	'	'	'	'	'	'	21.8	-136.9	-69.5
Consolidated net income	178.3	141.7	325.6	86.9	83.4	59.3	32.7	76.8	732.5	252.2	146
Less: Net income attributable to noncontrolling interests	'	'	'	'	'	'	'	'	-5.2	-3.1	-4.9
Net income attributable to Rock-Tenn Company shareholders	$176.50	$140.10	$324.70	$86	$82.30	$58.20	$31.90	$76.70	$727.30	$249.10	$141.10
Basic earnings per share attributable to Rock-Tenn Company shareholders	$2.45	$1.94	$4.51	$1.20	$1.15	$0.82	$0.45	$1.08	$10.10	$3.49	$2.81
Diluted earnings per share attributable to Rock-Tenn Company shareholders	$2.40	$1.91	$4.45	$1.18	$1.14	$0.81	$0.44	$1.06	$9.95	$3.45	$2.77
Cash dividends paid per share	'	'	'	'	'	'	'	'	$1.05	$0.80	$0.80

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (Loss) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Consolidated net income	$732.50	$252.20	$146
Other comprehensive income (loss), net of tax:	'	'	'
Foreign currency translation (loss) gain	-15.1	18.3	-12.9
Derivatives:	'	'	'
Deferred loss on cash flow hedges	0	0	-0.3
Less: Reclassification adjustment of net loss on cash flow hedges included in earnings	0	1.4	4
Defined benefit pension plans:	'	'	'
Net actuarial gain (loss) arising during period	184.1	-234.2	-211.2
Amortization of net actuarial loss, included in pension cost	24.2	13.3	12.2
Prior service credit (cost) arising during period	3.2	-1.4	0.3
Amortization of prior service cost, included in pension cost	0.9	0.4	0.4
Other comprehensive income adjustments	4.2	0	0
Other comprehensive income (loss)	201.5	-202.2	-207.5
Comprehensive income (loss)	934	50	-61.5
Less: Comprehensive income attributable to noncontrolling interests	-6.7	-2.2	-4.4
Comprehensive income (loss) attributable to Rock-Tenn Company shareholders	$927.30	$47.80	($65.90)

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Sep. 30, 2013		Sep. 30, 2012
In Millions, unless otherwise specified
Current Assets:	'		'
Cash and cash equivalents	$36.40		$37.20
Restricted cash	9.3		40.6
Accounts receivable (net of allowances of $26.8 and $26.9)	1,134.90		1,075.60
Inventories	937.9		861.9
Other current assets	297.9		174.5
Total current assets	2,416.40		2,189.80
Property, plant and equipment at cost:	'		'
Land and buildings	1,203.10		1,207.70
Machinery and equipment	6,467.80		6,121.70
Transportation equipment	13.8		13.6
Leasehold improvements	24.7		20
Property, plant and equipment, at cost	7,709.40		7,363
Less accumulated depreciation and amortization	-2,154.70		-1,751.60
Net property, plant and equipment	5,554.70		5,611.40
Goodwill	1,862.10		1,865.30
Intangibles, net	699.4		795.1
Other assets	200.8		225.5
Assets	10,733.40		10,687.10
Current liabilities:	'		'
Current portion of debt	2.9		261.3
Accounts payable	802.1		708.9
Accrued compensation and benefits	249		211.4
Other current liabilities	189.4		226.7
Total current liabilities	1,243.40		1,408.30
Long-term debt due after one year	2,841.90		3,151.20
Pension liabilities, net of current portion	975.2		1,493.10
Postretirement benefit liabilities, net of current portion	118.3		154.2
Deferred income taxes	1,063.10		888.8
Other long-term liabilities	165.4		173.9
Commitments and contingencies (Notes 10 and 16)	'		'
Redeemable noncontrolling interests	13.3		11.4
Equity:	'		'
Preferred stock, $0.01 par value; 50,000,000 shares authorized; no shares outstanding	0		0
Class A common stock, $0.01 par value; 175,000,000 shares authorized; 72,023,820 and 70,884,002 shares outstanding at September 30, 2013 and September 30, 2012, respectively	0.7		0.7
Capital in excess of par value	2,871.40		2,810.80
Retained earnings	1,740.80		1,094.70
Accumulated other comprehensive loss	-300.6	[1]	-500.5	[1]
Total Rock-Tenn Company shareholders’ equity	4,312.30		3,405.70
Noncontrolling interests	0.5		0.5
Total equity	4,312.80		3,406.20
Liabilities and Equity	$10,733.40		$10,687.10
[1]	All amounts are net of tax and noncontrolling interest.

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical Information) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Millions, except Share data, unless otherwise specified
Allowance for Doubtful Accounts Receivable, Current	$26.80	$26.90
Preferred Stock, Par or Stated Value Per Share	$0.01	$0.01
Preferred Stock, Shares Authorized	50,000,000	50,000,000
Preferred Stock, Shares Outstanding	0	0
Class A Common Stock, par value	$0.01	$0.01
Common Stock, Shares Authorized	175,000,000	175,000,000
Common Stock, Shares, Outstanding	72,023,820	70,884,002

Consolidated_Statements_of_Equ

Consolidated Statements of Equity (USD $)		Total		Common Stock [Member]	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Noncontrolling Interests [Member]		Smurfit Stone [Member]
In Millions, except Share data, unless otherwise specified
Balance at beginning of year at Sep. 30, 2010		'		'	'	$812.60	'	'		'
Balance at beginning of year at Sep. 30, 2010		'		'	'	'	-92.2	'		'
Balance at beginning year at Sep. 30, 2010	[1]	'		'	'	'	'	6.1		'
Balance at beginning of year at Sep. 30, 2010		'		'	290.5	'	'	'		'
Balance at beginning of year at Sep. 30, 2010		'		0.4	'	'	'	'		'
Balance at beginning of year at Sep. 30, 2010		'		38,903,036	'	'	'	'		'
Increase (Decrease) in Stockholders' Equity [Roll Forward]		'		'	'	'	'	'		'
Shares issued under restricted stock plan		'		537,078	'	'	'	'		'
Restricted stock grants forfeited		'		-7,675	'	'	'	'		'
Issuance of Class A common stock, net of stock received for minimum tax withholdings	[2]	'		31,035,465	'	'	'	'		'
Income tax benefit from share-based plans		'		'	0	'	'	'		'
Compensation expense under share-based plans		'		'	21.4	'	'	'		'
Issuance of Class A common stock, net of stock received for minimum tax withholdings	[2]	'		0.3	2,412.40	-8.7	'	'		'
Fair value of share-based awards issued in the Smurfit-Stone Acquisition		'		'	56.4	'	'	'		'
Purchase of subsidiary shares from noncontrolling interest		'		'	-18	'	'	-5.3	[1]	'
Net income attributable to Rock-Tenn Company shareholders		141.1		'	'	141.1	'	'		'
Cash dividends (per share - $1.05, $0.80 and $0.80)		'		'	'	-37.6	'	'		'
Other comprehensive income (loss), net of tax		-207.5		'	'	'	-207	0.4	[1]	'
Total Rock-Tenn Company Shareholders’ equity		3,371.60		'	'	'	'	'		'
Net income (loss)		-4.9		'	'	'	'	2	[1]	'
Distributions	[1]	'		'	'	'	'	-2.5		'
Total equity		3,372.30		'	'	'	'	'		'
Stock issued in acquisition		'		'	'	'	'	'		2,378.80
Balance at end of year at Sep. 30, 2011		'		'	'	907.4	'	'		'
Balance at end of year at Sep. 30, 2011		'		'	'	'	-299.2	'		'
Balance at end of year at Sep. 30, 2011	[1]	'		'	'	'	'	0.7		'
Balance at end of year at Sep. 30, 2011		'		'	2,762.70	'	'	'		'
Balance at end of year at Sep. 30, 2011		'		0.7	'	'	'	'		'
Balance at end of year at Sep. 30, 2011		'		70,467,904	'	'	'	'		'
Class A Common Stock, par value		$0.01		'	'	'	'	'		'
Increase (Decrease) in Stockholders' Equity [Roll Forward]		'		'	'	'	'	'		'
Shares issued under restricted stock plan		'		87,930	'	'	'	'		'
Restricted stock grants forfeited		'		-1,875	'	'	'	'		'
Issuance of Class A common stock, net of stock received for minimum tax withholdings		'		330,043	'	'	'	'		'
Income tax benefit from share-based plans		'		'	8.4	'	'	'		'
Compensation expense under share-based plans		'		'	29.2	'	'	'		'
Issuance of Class A common stock, net of stock received for minimum tax withholdings		'		0	10.5	-5.3	'	'		'
Fair value of share-based awards issued in the Smurfit-Stone Acquisition		'		'	0	'	'	'		'
Purchase of subsidiary shares from noncontrolling interest		'		'	0	'	'	0	[1]	'
Net income attributable to Rock-Tenn Company shareholders		249.1		'	'	249.1	'	'		'
Cash dividends (per share - $1.05, $0.80 and $0.80)		'		'	'	-56.5	'	'		'
Other comprehensive income (loss), net of tax		-202.2		'	'	'	-201.3	0	[1]	'
Total Rock-Tenn Company Shareholders’ equity		3,405.70		'	'	'	'	'		'
Net income (loss)		-3.1		'	'	'	'	-0.1	[1]	'
Distributions	[1]	'		'	'	'	'	-0.1		'
Total equity		3,406.20		'	'	'	'	'		'
Shares reserved for future issuance		'		'	'	'	'	'		700,000
Balance at end of year at Sep. 30, 2012		1,094.70		'	'	1,094.70	'	'		'
Balance at end of year at Sep. 30, 2012		-500.5	[3]	'	'	'	-500.5	'		'
Balance at end of year at Sep. 30, 2012		0.5		'	'	'	'	0.5	[1]	'
Balance at end of year at Sep. 30, 2012		'		'	2,810.80	'	'	'		'
Balance at end of year at Sep. 30, 2012		0.7		0.7	'	'	'	'		'
Balance at end of year at Sep. 30, 2012		70,884,002		70,884,002	'	'	'	'		'
Class A Common Stock, par value		$0.01		'	'	'	'	'		'
Increase (Decrease) in Stockholders' Equity [Roll Forward]		'		'	'	'	'	'		'
Shares issued under restricted stock plan		'		372,793	'	'	'	'		'
Restricted stock grants forfeited		'		0	'	'	'	'		'
Issuance of Class A common stock, net of stock received for minimum tax withholdings		'		767,025	'	'	'	'		'
Income tax benefit from share-based plans		'		'	5.7	'	'	'		'
Compensation expense under share-based plans		'		'	46.5	'	'	'		'
Issuance of Class A common stock, net of stock received for minimum tax withholdings		'		0	8.4	-4.9	'	'		'
Fair value of share-based awards issued in the Smurfit-Stone Acquisition		'		'	0	'	'	'		'
Purchase of subsidiary shares from noncontrolling interest		'		'	0	'	'	0	[1]	'
Net income attributable to Rock-Tenn Company shareholders		727.3		'	'	727.3	'	'		'
Cash dividends (per share - $1.05, $0.80 and $0.80)	[4]	'		'	'	-76.3	'	'		'
Other comprehensive income (loss), net of tax		201.5		'	'	'	199.9	0	[1]	'
Total Rock-Tenn Company Shareholders’ equity		4,312.30		'	'	'	'	'		'
Net income (loss)		-5.2		'	'	'	'	0.4	[1]	'
Distributions	[1]	'		'	'	'	'	-0.4		'
Total equity		4,312.80		'	'	'	'	'		'
Shares reserved for future issuance		'		'	'	'	'	'		200,000
Stock Issued During Period, Shares, Resolution of Bankruptcy Claims		'		'	'	'	'	'		500,000
Balance at end of year at Sep. 30, 2013		1,740.80		'	'	1,740.80	'	'		'
Balance at end of year at Sep. 30, 2013		-300.6	[3]	'	'	'	-300.6	'		'
Balance at end of year at Sep. 30, 2013		0.5		'	'	'	'	0.5	[1]	'
Balance at end of year at Sep. 30, 2013		'		'	2,871.40	'	'	'		'
Balance at end of year at Sep. 30, 2013		$0.70		$0.70	'	'	'	'		'
Balance at end of year at Sep. 30, 2013		72,023,820		72,023,820	'	'	'	'		'
[1]	Excludes amounts related to contingently redeemable noncontrolling interests which are separately classified outside of permanent equity in the Consolidated Balance Sheets.
[2]	Included in the fiscal 2011 Issuance of Class A common stock is the issuance of approximately 31.0 million shares of Common Stock valued at $2,378.8 million in connection with the Smurfit-Stone Acquisition, including approximately 0.7 million shares reserved but unissued at the time of the acquisition for the resolution of Smurfit-Stone bankruptcy claims. In fiscal 2013, 0.5 million shares previously reserved but unissued were issued related to the Smurfit-Stone bankruptcy claims.
[3]	All amounts are net of tax and noncontrolling interest.
[4]	Includes cash dividends paid and dividends declared but unpaid related to the shares reserved but unissued at the time of the acquisition for the resolution of Smurfit-Stone bankruptcy claims.

Consolidated_Statements_of_Equ1

Consolidated Statements of Equity (Parenthetical Information) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Cash dividends paid per share	$1.05	$0.80	$0.80

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Operating activities:	'	'	'
Consolidated net income	$732.50	$252.20	$146
Adjustments to reconcile consolidated net income to net cash provided by operating activities:	'	'	'
Depreciation, depletion and amortization	552.2	534.3	278.3
Deferred income tax (benefit) expense	-44.3	123.4	60
Share-based compensation expense	46.5	29.2	21.4
Loss on extinguishment of debt	0.3	25.9	39.5
(Gain) loss on disposal of plant, equipment and other, net	-13.9	-10	0.9
Equity in income of unconsolidated entities	-4.6	-3.4	-1.5
Pension and other postretirement funding more than expense	-167.1	-305.4	-22.7
Settlement of interest rate swaps and foreign currency hedge	0	-2.8	1.7
Impairment adjustments and other non-cash items	21.2	29.2	31.5
Change in operating assets and liabilities, net of acquisitions:	'	'	'
Accounts receivable	-63.2	55.5	-14.4
Inventories	-122.8	7.1	-0.5
Other assets	-13.1	-17.8	33.2
Accounts payable	87.5	-77.8	-38.8
Income taxes	-13.8	13.3	-56.2
Accrued liabilities and other	35.1	3.8	-16.7
Net cash provided by operating activities	1,032.50	656.7	461.7
Investing activities:	'	'	'
Capital expenditures	-440.4	-452.4	-199.4
Cash paid for the purchase of a leased facility	0	-17	0
Cash paid for purchase of business, net of cash acquired	-6.3	-125.6	-1,300.10
Investment in unconsolidated entities	-0.1	-1.7	-2
Return of capital from unconsolidated entities	1	1.8	1
Proceeds from sale of property, plant and equipment	26.8	40.5	8.6
Proceeds from property, plant and equipment insurance settlement	15.4	10.2	0.5
Net cash used for investing activities	-403.6	-544.2	-1,491.40
Financing activities:	'	'	'
Proceeds from issuance of notes	0	1,442.20	0
Additions to revolving credit facilities	99	748.1	802.6
Repayments of revolving credit facilities	-146.2	-759.8	-564.5
Additions to debt	277	326.6	2,877.40
Repayments of debt	-787.4	-1,803.60	-1,966.30
Debt issuance costs	-2	-16.2	-43.8
Cash paid for debt extinguishment costs	-0.1	-14	-37.9
Issuances of common stock, net of related minimum tax withholdings	3.5	5.2	25.2
Excess tax benefits from share-based compensation	6	10	0
Advances from unconsolidated entity	1.2	0.2	1.7
Cash dividends paid to shareholders	-75.3	-56.5	-37.6
Cash distributions paid to noncontrolling interests	-4.9	-0.8	-5.2
Net cash (used for) provided by financing activities	-629.2	-118.6	1,051.60
Effect of exchange rate changes on cash and cash equivalents	-0.5	1.6	3.9
(Decrease) increase in cash and cash equivalents	-0.8	-4.5	25.8
Cash and cash equivalents at beginning of period	37.2	41.7	15.9
Cash and cash equivalents at end of period	36.4	37.2	41.7
Supplemental disclosure of cash flow information:	'	'	'
Income taxes, net of refunds	22	-9.6	22.7
Interest, net of amounts capitalized	$98.80	$114.80	$86.90

Consolidated_Statements_of_Cas1

Consolidated Statements of Cash Flows (Parenthetical Information) (USD $)	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2013	27-May-11	27-May-11	27-May-11
In Millions, unless otherwise specified	GMI, Mid South and Smurfit-Stone [Member]	Smurfit Stone [Member]	Corrugated Sheet Plant [Member]	Parent [Member]	Noncontrolling Interest [Member]	Additional Paid-in Capital [Member]
				Smurfit Stone [Member]	Smurfit Stone [Member]	Smurfit Stone [Member]
Fair value of assets acquired, including goodwill	$145.70	$7,729.40	$7.90	'	'	'
Cash consideration, net of cash acquired	122.3	1,303.40	6.3	'	'	'
Stock issued in acquisition	0	2,378.80	0	'	'	'
Fair value of share-based awards issued in the acquisition	0	56.4	0	'	'	'
Total liabilities and noncontrolling interests assumed	23.4	3,990.80	1.6	'	'	'
Debt assumed in acquisition	0	1,180.50	0	'	'	'
Purchase of subsidiary shares of noncontrolling interest, fair value	'	'	'	$23.30	$5.30	$18

Description_of_Business_and_Su

Description of Business and Summary of Significant Accounting Policies	12 Months Ended
	Sep. 30, 2013
Description of Business and Summary of Significant Accounting Policies [Abstract]	'
Basis of Presentation and Significant Accounting Policies [Text Block]	'
	Description of Business and Summary of Significant Accounting Policies
	Description of Business
	We are one of North America's leading integrated manufacturers of corrugated and consumer packaging. We operate locations in the United States, Canada, Mexico, Chile, Argentina, Puerto Rico and China.
	Consolidation
	The consolidated financial statements include our accounts and the accounts of our partially-owned consolidated subsidiaries. Equity investments in which we exercise significant influence but do not control and are not the primary beneficiary are accounted for using the equity method. Investments in which we are not able to exercise significant influence over the investee are accounted for under the cost method. Our equity and cost method investments are not significant either individually or in the aggregate. We have eliminated all significant intercompany accounts and transactions.
	Use of Estimates
	Preparing consolidated financial statements in conformity with generally accepted accounting principles in the United States requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results may differ from those estimates, and the differences could be material.
	The most significant accounting estimates inherent in the preparation of our consolidated financial statements include estimates to evaluate the recoverability of goodwill, intangibles and property, plant and equipment, to determine the useful lives of assets that are amortized or depreciated, and to measure income taxes, self-insured obligations, restructuring activities and allocate the purchase price of an acquired business to the fair value of acquired assets and liabilities. In addition, significant estimates form the basis for our reserves with respect to collectibility of accounts receivable, inventory valuations, pension benefits, deferred tax asset valuation allowances and certain benefits provided to current employees. Various assumptions and other factors underlie the determination of these significant estimates. The process of determining significant estimates is fact specific and takes into account factors such as historical experience, current and expected economic conditions, product mix, and in some cases, actuarial techniques. We regularly evaluate these significant factors and make adjustments where facts and circumstances dictate.
	Revenue Recognition
	We recognize revenue when there is persuasive evidence that an arrangement exists, delivery has occurred or services have been rendered, our price to the buyer is fixed or determinable and collectibility is reasonably assured. Delivery is not considered to have occurred until the customer takes title and assumes the risks and rewards of ownership. The timing of revenue recognition is dependent on the location of title transfer which is normally either on the exit from our plants (i.e., shipping point) or on arrival at customers’ plants (i.e., destination point). We do not recognize revenue from transactions where we bill customers but retain custody and title to these products until the date custody and title transfer. We do not have any significant multiple deliverable revenue arrangements.
	We net, against our gross sales, provisions for discounts, returns, allowances, customer rebates and other adjustments. We account for such provisions during the same period in which we record the related revenues. We include in net sales any amounts related to shipping and handling that are billed to a customer.
	Shipping and Handling Costs
	We classify shipping and handling costs as a component of cost of goods sold.
	Cash Equivalents
	We consider all highly liquid investments that mature three months or less from the date of purchase to be cash equivalents. The carrying amounts we report in the consolidated balance sheets for cash and cash equivalents approximate fair market values. We place our cash and cash equivalents with large credit worthy banks, which limits the amount of our credit exposure.
	Accounts Receivable and Allowances
	We perform periodic evaluations of our customers’ financial condition and generally do not require collateral. Receivables generally are due within 30 to 60 days, although recent trends are for customers to seek longer terms. We serve a diverse customer base primarily in North America and, therefore, have limited exposure from credit loss to any particular customer or industry segment.
	We state accounts receivable at the amount owed by the customer, net of an allowance for estimated uncollectible accounts, returns and allowances, cash discounts and other adjustments. We do not discount accounts receivable because we generally collect accounts receivable over a relatively short time. We account for sales and other taxes that are imposed on and concurrent with individual revenue-producing transactions between a customer and us on a net basis which excludes the taxes from our net sales. We estimate our allowance for doubtful accounts based on our historical experience, current economic conditions and the credit worthiness of our customers. We charge off receivables when they are determined to be no longer collectible. In fiscal 2013, 2012 and 2011, we recorded bad debt expense of $5.6 million, $6.6 million and $1.1 million, respectively.
	The following table represents a summary of the changes in the reserve for allowance for doubtful accounts, returns and allowances and cash discounts for fiscal 2013, 2012 and 2011 (in millions):
		2013			2012			2011
	Balance at the beginning of period	$	26.9		$	30.1		$	7.8
	Reduction in sales and charges to costs and expenses (1)	126.4			107.9			78.2
	Deductions	(126.5		)	(111.1		)	(55.9		)
	Balance at the end of period	$	26.8		$	26.9		$	30.1
	(1) Includes the impact of acquisitions.
	Inventories
	We value substantially all U.S. inventories at the lower of cost or market, with cost determined on the last-in first-out basis. We value all other inventories at the lower of cost or market, with cost determined using methods that approximate cost computed on a first-in first-out basis. These other inventories represent primarily foreign inventories, spare parts inventories and certain inventoried supplies and aggregate to approximately 24% and 29% of FIFO cost of all inventory at September 30, 2013 and 2012, respectively.
	Prior to the application of the LIFO method, our U.S. operating divisions use a variety of methods to estimate the FIFO cost of their finished goods inventories. Such methods include standard costs, or average costs computed by dividing the actual cost of goods manufactured by the tons produced and multiplying this amount by the tons of inventory on hand. Lastly, certain operations calculate a ratio, on a plant by plant basis, the numerator of which is the cost of goods sold and the denominator is net sales. This ratio is applied to the estimated sales value of the finished goods inventory. Variances and other unusual items are analyzed to determine whether it is appropriate to include those items in the value of inventory. Examples of variances and unusual items that are considered to be current period charges include, but are not limited to, abnormal production levels, freight, handling costs, and wasted materials (spoilage). Cost includes raw materials and supplies, direct labor, indirect labor related to the manufacturing process and depreciation and other factory overheads.
	Property, Plant and Equipment
	We state property, plant and equipment at cost. Cost includes major expenditures for improvements and replacements that extend useful lives, increase capacity, increase revenues or reduce costs. During fiscal 2013, 2012 and 2011, we capitalized interest of approximately $2.9 million, $3.4 million and $2.8 million, respectively. For financial reporting purposes, we provide depreciation and amortization primarily on a straight-line method over the estimated useful lives of the assets as follows:
	Buildings and building improvements		15-40 years
	Machinery and equipment		3-44 years
	Transportation equipment		3-8 years
	Generally our machinery and equipment have estimated useful lives between 3 and 20 years; however, select portions of machinery and equipment at our mills have estimated useful lives up to 44 years. Leasehold improvements are depreciated over the shorter of the asset life or the lease term, generally between 3 and 10 years. Depreciation expense for fiscal 2013, 2012 and 2011 was approximately $461.3 million, $434.6 million and $228.2 million, respectively.
	Goodwill and Long-Lived Assets
	We review the carrying value of our goodwill annually at the beginning of the fourth quarter of each fiscal year, or more often if events or changes in circumstances indicate that the carrying amount may exceed fair value as set forth in ASC 350, “Intangibles — Goodwill and Other”. We test goodwill for impairment at the reporting unit level, which is an operating segment or one level below an operating segment, which is referred to as a component. A component of an operating segment is a reporting unit if the component constitutes a business for which discrete financial information is available and segment management regularly reviews the operating results of that component. However, two or more components of an operating segment are aggregated and deemed a single reporting unit if the components have similar economic characteristics. The amount of goodwill acquired in a business combination that is assigned to one or more reporting units as of the acquisition date is the excess of the purchase price of the acquired businesses (or portion thereof) included in the reporting unit, over the fair value assigned to the individual assets acquired or liabilities assumed. Goodwill is assigned to the reporting unit(s) expected to benefit from the synergies of the combination even though other assets or liabilities of the acquired entity may not be assigned to that reporting unit. We determine recoverability by comparing the estimated fair value of the reporting unit to which the goodwill applies to the carrying value, including goodwill, of that reporting unit using a discounted cash flow model.
	The goodwill impairment model is a two-step process. An amendment to ASC 350 became effective December 2011 that allows a qualitative assessment, prior to step one, to determine whether it is more likely than not that the fair value of a reporting unit exceeds its carrying amount. We did not attempt a qualitative assessment and moved directly to step one. In step one, we utilize the present value of expected net cash flows to determine the estimated fair value of our reporting units. This present value model requires management to estimate future net cash flows, the timing of these cash flows, and a discount rate (based on a weighted average cost of capital), which represents the time value of money and the inherent risk and uncertainty of the future cash flows. Factors that management must estimate when performing this step in the process include, among other items, sales volume, prices, inflation, discount rates, exchange rates, tax rates, anticipated synergies resulting from the Smurfit-Stone Acquisition and capital spending. The assumptions we use to estimate future cash flows are consistent with the assumptions that the reporting units use for internal planning purposes, updated to reflect current expectations. If we determine that the estimated fair value of the reporting unit exceeds its carrying amount, goodwill of the reporting unit is not impaired. If we determine that the carrying amount of the reporting unit exceeds its estimated fair value, we complete step two of the impairment analysis. Step two involves determining the implied fair value of the reporting unit’s goodwill and comparing it to the carrying amount of that goodwill. If the carrying amount of the reporting unit’s goodwill exceeds the implied fair value of that goodwill, we recognize an impairment loss in an amount equal to that excess. We completed the annual test of the goodwill associated with each of our reporting units during fiscal 2013 and concluded the fair values were in excess of the carrying values of each of the reporting units. No events have occurred since the latest annual goodwill impairment assessment that would necessitate an interim goodwill impairment assessment.
	We follow provisions included in ASC 360, “Property, Plant and Equipment” in determining whether the carrying value of any of our long-lived assets, including amortizing intangibles other than goodwill, is impaired. The ASC 360 test is a three-step test for assets that are “held and used” as that term is defined by ASC 360. We determine whether indicators of impairment are present. We review long-lived assets for impairment when events or changes in circumstances indicate that the carrying amount of the long-lived asset might not be recoverable. If we determine that indicators of impairment are present, we determine whether the estimated undiscounted cash flows for the potentially impaired assets are less than the carrying value. This requires management to estimate future net cash flows through operations over the remaining useful life of the asset and its ultimate disposition. The assumptions we use to estimate future cash flows are consistent with the assumptions we use for internal planning purposes, updated to reflect current expectations. If our estimated undiscounted cash flows do not exceed the carrying value, we estimate the fair value of the asset and record an impairment charge if the carrying value is greater than the fair value of the asset. We estimate fair value using discounted cash flows, observable prices for similar assets, or other valuation techniques. We record assets classified as “held for sale” at the lower of their carrying value or estimated fair value less anticipated costs to sell.
	Included in our long-lived assets are certain identifiable intangible assets. These intangible assets are amortized based on the approximate pattern in which the economic benefits are consumed or straight-line if the pattern was not reliably determinable. Estimated useful lives range from 2 to 40 years and have a weighted average life of approximately 12.4 years.
	Our judgments regarding the existence of impairment indicators are based on legal factors, market conditions and operational performance. Future events could cause us to conclude that impairment indicators exist and that assets associated with a particular operation are impaired. Evaluating impairment also requires us to estimate future operating results and cash flows, which also require judgment by management. Any resulting impairment loss could have a material adverse impact on our financial condition and results of operations.
	Restructuring
	We have restructured portions of our operations from time to time, have current restructuring initiatives taking place, and it is possible that we may engage in future restructuring activities. Identifying and calculating the cost to exit these operations requires certain assumptions to be made, the most significant of which are anticipated future liabilities, including leases and other contractual obligations, and the adjustment of property, plant and equipment to net realizable value. We believe our estimates are reasonable, considering our knowledge of the industries we operate in, previous experience in exiting activities and valuations we may obtain from independent third parties. Although our estimates have been reasonably accurate in the past, significant judgment is required, and these estimates and assumptions may change as additional information becomes available and facts or circumstances change.
	Business Combinations
	From time to time, we enter into material business combinations. In accordance with ASC 805, “Business Combinations”, we generally recognize the identifiable assets acquired, the liabilities assumed, and any noncontrolling interests in an acquiree at their fair values as of the date of acquisition. We measure goodwill as the excess of consideration transferred, which we also measure at fair value, over the net of the acquisition date fair values of the identifiable assets acquired and liabilities assumed. The acquisition method of accounting requires us to make significant estimates and assumptions regarding the fair values of the elements of a business combination as of the date of acquisition, including the fair values of identifiable intangible assets, deferred tax asset valuation allowances, liabilities related to uncertain tax positions, contingent consideration and contingencies. This method also requires us to refine these estimates over a measurement period not to exceed one year to reflect new information obtained about facts and circumstances that existed as of the acquisition date that, if known, would have affected the measurement of the amounts recognized as of that date. If we are required to retroactively adjust provisional amounts that we have recorded for the fair values of assets and liabilities in connection with acquisitions, these adjustments could have a material impact on our financial condition and results of operations.
	Significant estimates and assumptions in estimating the fair value of acquired technology, customer relationships, and other identifiable intangible assets include future cash flows that we expect to generate from the acquired assets. If the subsequent actual results and updated projections of the underlying business activity change compared with the assumptions and projections used to develop these values, we could record impairment charges. In addition, we have estimated the economic lives of certain acquired assets and these lives are used to calculate depreciation and amortization expense. If our estimates of the economic lives change, depreciation or amortization expenses could be increased or decreased, or the acquired asset could be impaired.
	Fair Value of Financial Instruments and Nonfinancial Assets and Liabilities
	We estimate fair values in accordance with ASC 820 “Fair Value Measurement”. We define fair value as the price that would be received from the sale of an asset or paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date.
	Financial instruments not recognized at fair value on a recurring or nonrecurring basis include cash and cash equivalents, accounts receivables, certain other current assets, short-term debt, accounts payable, certain other current liabilities and long-term debt. With the exception of long-term debt, the carrying amounts of these financial instruments approximate their fair values due to their short maturities. The fair values of our long-term debt are estimated using quoted market prices or are based on the discounted value of future cash flows. We disclose the fair value of long-term debt and our pension and postretirement assets and liabilities in “Note 9. Fair Value” and “Note 12. Retirement Plans” of the Notes to Consolidated Financial Statements. We have, or from time to time may have, financial instruments recognized at fair value including supplemental retirement savings plans that are nonqualified deferred compensation plans pursuant to which assets are invested primarily in mutual funds, interest rate derivatives, commodity derivatives or other similar class of assets or liabilities, the fair value of which are not significant. We measure the fair value of our mutual fund investments based on quoted prices in active markets, and our derivative contracts and our residual interest in Timber Note Holdings LLC notes based on discounted cash flows.
	We measure certain nonfinancial assets and nonfinancial liabilities at fair value on a nonrecurring basis. These assets and liabilities include cost and equity method investments when they are deemed to be other-than-temporarily impaired, assets acquired and liabilities assumed in an acquisition or in a nonmonetary exchange, and property, plant and equipment and goodwill and other intangible assets that are written down to fair value when they are held for sale or determined to be impaired. Given the nature of nonfinancial assets and liabilities, evaluating their fair value from the perspective of a market participant is inherently complex. Assumptions and estimates about future values can be affected by a variety of internal and external factors. Changes in these factors may require us to revise our estimates and could result in future impairment charges for goodwill and acquired intangible assets, or retroactively adjust provisional amounts that we have recorded for the fair values of assets and liabilities in connection with business combinations. These adjustments could have a material impact on our financial condition and results of operations. We discuss fair values in more detail in “Note 9. Fair Value.”
	Derivatives
	We are exposed to interest rate risk, commodity price risk and foreign currency exchange risk. To manage these risks, from time to time and to varying degrees, we may enter into a variety of financial derivative transactions and certain physical commodity transactions that are determined to be derivatives. Interest rate swaps may be entered into to manage the interest rate risk associated with a portion of our outstanding debt. Interest rate swaps are either designated for accounting purposes as cash flow hedges of forecasted floating interest payments on variable rate debt or fair value hedges of fixed rate debt, or we may elect not to treat them as accounting hedges. Forward contracts on certain commodities may be entered into to manage the price risk associated with forecasted purchases or sales of those commodities. In addition, certain commodity financial derivative contracts and physical commodity contracts that are determined to be derivatives may not be designated as accounting hedges because either they do not meet the criteria for treatment as accounting hedges under ASC 815, “Derivatives and Hedging”, or we elect not to treat them as accounting hedges under ASC 815. We may also enter into forward contracts to manage our exposure to fluctuations in Canadian foreign currency rates with respect to transactions denominated in Canadian dollars.
	Outstanding financial derivative instruments expose us to credit loss in the event of nonperformance by the counterparties to the agreements. Our credit exposure related to these financial instruments is represented by the fair value of contracts reported as assets. We manage our exposure to counterparty credit risk through minimum credit standards, diversification of counterparties and procedures to monitor concentrations of credit risk. We may enter into financial derivative contracts that may contain credit-risk-related contingent features which could result in a counterparty requesting immediate payment or demanding immediate and ongoing full overnight collateralization on derivative instruments in net liability positions.
	For financial derivative instruments that are designated as a cash flow hedge for accounting purposes, the effective portion of the gain or loss on the financial derivative instrument is reported as a component of other comprehensive income and reclassified into earnings in the same line item associated with the forecasted transaction, and in the same period or periods during which the forecasted transaction affects earnings. Gains and losses on the financial derivative representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness are recognized in current earnings.
	We have at times entered into interest rate swap agreements that effectively modified our exposure to interest rate risk by converting a portion of our interest payments on floating rate debt to a fixed rate basis, thus reducing the impact of interest rate changes on future interest expense. These agreements typically involved the receipt of floating rate amounts in exchange for fixed interest rate payments over the life of the agreements without an exchange of the underlying principal amount.
	The impact of derivative instruments have not been material in any of the years presented.
	Health Insurance
	We are self-insured for the majority of our group health insurance costs. We calculate our group health insurance reserve on an undiscounted basis based on estimated reserve rates. We utilize claims lag data provided by our claims administrators to compute the required estimated reserve rate. We calculate our average monthly claims paid using the actual monthly payments during the trailing 12-month period. At that time, we also calculate our required reserve using the reserve rates discussed above. While we believe that our assumptions are appropriate, significant differences in our actual experience or significant changes in our assumptions may materially affect our group health insurance costs.
	Workers’ Compensation
	We purchase large risk deductible workers’ compensation policies for the majority of our workers’ compensation liabilities that are subject to various deductibles to limit our exposure. We calculate our workers’ compensation reserves on an undiscounted basis based on estimated actuarially calculated development factors. While we believe that our assumptions are appropriate, significant differences in our actual experience or significant changes in our assumptions may materially affect our workers' compensation costs.
	Income Taxes
	We account for income taxes under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the financial statements. Under this method, deferred tax assets and liabilities are determined based on the differences between the financial statement carrying amount and tax basis of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date.
	We record net deferred tax assets to the extent we believe these assets will more likely than not be realized. In making such determination, we consider all available positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax planning strategies, recent financial operations and their associated valuation allowances, if any. In the event we were to determine that we would be able to realize our deferred income tax assets in the future in excess of their net recorded amount, we would make an adjustment to the valuation allowance, which would reduce the provision for income taxes.
	Certain provisions of ASC 740, “Income Taxes” provide that a tax benefit from an uncertain tax position may be recognized when it is more likely than not that the position will be sustained upon examination, including resolutions of any related appeals or litigation processes, based on the technical merits. Income tax positions must meet a more likely than not recognition threshold at the effective date to be recognized upon the adoption of these provisions and in subsequent periods. See “Note 11. Income Taxes.”
Pension and Other Postretirement Benefits
We account for pension and other postretirement benefits in accordance with ASC 715, “Compensation — Retirement Benefits”. Accordingly, we recognize the funded status of our pension plans as assets or liabilities in our consolidated balance sheets. The funded status is the difference between our projected benefit obligations and fair value of plan assets. The determination of our obligation and expense for pension and other postretirement benefits is dependent on our selection of certain assumptions used by actuaries in calculating such amounts. We describe these assumptions in “Note 12. Retirement Plans,” which include, among others, the discount rate, expected long-term rate of return on plan assets and rates of increase in compensation levels. As provided under ASC 715, we defer actual results that differ from our assumptions and amortize the difference over future periods. Therefore, these differences generally affect our recognized expense and funding requirements in future periods. While we believe that our assumptions are appropriate, significant differences in our actual experience or significant changes in our assumptions may materially affect our pension and other postretirement benefit obligations and our future expense.
Stock Based Compensation
We recognize expense for stock based compensation plans based on the estimated fair value of the related awards in accordance with ASC 718, “Compensation — Stock Compensation”. Pursuant to our Amended and Restated 2004 Incentive Stock Plan (“2004 Incentive Stock Plan”), we can award shares of restricted Common Stock to employees and our board of directors. The grants generally vest over a period of 3 years depending on the nature of the award, except for non-employee director grants, which vest over one year. Our restricted stock grants to employees generally contain market or performance conditions that must be met in conjunction with a service requirement for the shares to vest. We charge compensation under the plan to earnings over each increment’s individual restriction period. See “Note 14. Share-Based Compensation” for additional information.
Asset Retirement Obligations
The Company accounts for asset retirement obligations in accordance with ASC 410, “Asset Retirement and Environmental Obligations”. A liability and an asset are recorded equal to the present value of the estimated costs associated with the retirement of long-lived assets where a legal or contractual obligation exists and the liability can be reasonably estimated. The liability is accreted over time and the asset is depreciated over the remaining life of the related asset. Upon settlement of the liability, we will recognize a gain or loss for any difference between the settlement amount and the liability recorded. Asset retirement obligations with indeterminate settlement dates are not recorded until such time that a reasonable estimate may be made. Our asset retirement obligations consist primarily of landfill closure and post-closure costs at certain of our paperboard mills. At September 30, 2013 and September 30, 2012, liabilities of $14.9 million and $16.3 million, respectively, were accrued.
Repair and Maintenance Costs
We expense routine repair and maintenance costs as we incur them. We defer expenses we incur during planned major maintenance activities and recognize the expenses ratably over the shorter of the estimated interval until the next major maintenance activity, the life of the deferred item, or until the next major maintenance activity occurs. This maintenance is generally performed every twelve to twenty-four months and has a significant impact on our results of operations in the period performed primarily due to lost production during the maintenance period.
Foreign Currency
We translate the assets and liabilities of our foreign operations from their functional currency into U.S. dollars at the rate of exchange in effect as of the balance sheet date. We reflect the resulting translation adjustments in equity. We translate the revenues and expenses of our foreign operations at a daily average rate prevailing for each month during the fiscal year. We include gains or losses from foreign currency transactions, such as those resulting from the settlement of foreign receivables or payables, in the consolidated statements of income. We recorded a gain of $2.5 million in fiscal 2013, a loss of $5.5 million in fiscal 2012 and a gain of $3.9 million in 2011 from foreign currency transactions. We also recorded a foreign currency loss of approximately $13.5 million in fiscal 2011 related to a Canadian intercompany loan.
Environmental Remediation Costs
We accrue for losses associated with our environmental remediation obligations when it is probable that we have incurred a liability and the amount of the loss can be reasonably estimated. We generally recognize accruals for estimated losses from our environmental remediation obligations no later than completion of the remedial feasibility study and adjust such accruals as further information develops or circumstances change. We recognize recoveries of our environmental remediation costs from other parties as assets when we deem their receipt probable. See “Note 16. Commitments and Contingencies.”
New Accounting Standards - Recently Adopted
In February 2013, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2013-02 “Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income”, which amended certain provisions in ASC 220 “Comprehensive Income”. These provisions required the disclosure of significant amounts that are reclassified out of other comprehensive income into net income and disclosure of additional information about changes in accumulated other comprehensive income. These provisions are effective for fiscal and interim periods beginning after December 15, 2012 (January 1, 2013 for us). The adoption of these provisions did not have a material effect on our consolidated financial statements.
In December 2011, the FASB issued ASU 2011-11 “Disclosures about Offsetting Assets and Liabilities”, which amends certain provisions in ASC 210 “Balance Sheet”. Subsequently, in January 2013, the FASB issued ASU 2013-01, which amended the scope of ASU 2011-11. These provisions require additional disclosures for certain financial instruments that are presented net for financial statement presentation or are subject to a master netting arrangement, including the gross amount of the asset and liability as well as the impact of any net amount presented in the consolidated financial statements. These provisions are effective for fiscal and interim periods beginning on or after January 1, 2013. The adoption of these provisions did not have a material impact on our consolidated financial statements.
New Accounting Standards - Recently Issued
In March 2013, the FASB issued ASU 2013-05 “Foreign Currency Matters, Parents Accounting for the Cumulative Translation Adjustment upon Derecognition of Certain Subsidiaries or Groups of Assets within a Foreign Entity or of an Investment in a Foreign Entity”. This ASU amends ASC 810 “Consolidation”, ASC 805 “Business Combinations” and ASC 830 “Foreign Currency” and clarifies the criteria that should be considered, such as the loss or acquisition of a controlling financial interest and whether the sale or transfer results in the complete or substantially complete liquidation of an entity, to determine the release of cumulative translation adjustments into net income upon derecognition of a subsidiary, equity method investment or a group of assets within a foreign entity. These provisions are effective for annual and interim periods beginning after December 15, 2013 (January 1, 2014 for us). We do not expect that the adoption of these provisions will have a material effect on our consolidated financial statements.
In July 2013, the FASB issued ASU 2013-11 “Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss or a Tax Credit Carryforward Exists”. This ASU amends ASC 740 “Income Taxes” and clarifies when a liability related to an unrecognized tax benefit should be presented in the financial statements as a reduction to the related deferred tax asset for a net operating loss carryforward, a similar tax loss or a tax credit carryforward. These provisions are effective for annual and interim periods beginning after December 15, 2013 (January 1, 2014 for us). We do not expect that the adoption of these provisions will have a material effect on our consolidated financial statements.

Earnings_per_Share

Earnings per Share	12 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share	'
	Earnings per Share
	Certain of our restricted stock awards are considered participating securities as they receive non-forfeitable rights to dividends at the same rate as common stock. As participating securities, we include these instruments in the earnings allocation in computing earnings per share under the two-class method described in ASC 260 “Earnings per Share.” The following table sets forth the computation of basic and diluted earnings per share under the two-class method (in millions, except per share data):
		September 30,
		2013			2012			2011
	Basic earnings per share:
	Numerator:
	Net income attributable to Rock-Tenn Company shareholders	$	727.3		$	249.1		$	141.1
	Less: Distributed and undistributed income available to participating securities	(0.2		)	(0.8		)	(1.4		)
	Distributed and undistributed income attributable to Rock-Tenn Company shareholders	$	727.1		$	248.3		$	139.7
	Denominator:
	Basic weighted average shares outstanding	72			71.2			49.7
	Basic earnings per share attributable to Rock-Tenn Company shareholders	$	10.1		$	3.49		$	2.81
	Diluted earnings per share:
	Numerator:
	Net income attributable to Rock-Tenn Company shareholders	$	727.3		$	249.1		$	141.1
	Less: Distributed and undistributed income available to participating securities	(0.2		)	(0.7		)	(1.4		)
	Distributed and undistributed income attributable to Rock-Tenn Company shareholders	$	727.1		$	248.4		$	139.7
	Denominator:
	Basic weighted average shares outstanding	72			71.2			49.7
	Effect of dilutive stock options and non-participating securities	1.1			0.9			0.8
	Diluted weighted average shares outstanding	73.1			72.1			50.5
	Diluted earnings per share attributable to Rock-Tenn Company shareholders	$	9.95		$	3.45		$	2.77
	Weighted average shares includes 0.2 million and 0.7 million of reserved, but unissued shares at September 30, 2013 and 2012. These reserved shares will be distributed as claims are liquidated or resolved in accordance with the resolution of Smurfit-Stone bankruptcy claims.
	Options to purchase 0.1 million, 0.3 million and 0.1 million shares of Common Stock in fiscal 2013, 2012 and 2011, respectively, were not included in the computation of diluted earnings per share attributable to Rock-Tenn Company shareholders because the effect of including the options in the computation would have been antidilutive. The dilutive impact of the remaining options outstanding in each year was included in the effect of dilutive securities.

Other_Comprehensive_Income_Los

Other Comprehensive Income (Loss)	12 Months Ended
	Sep. 30, 2013
Other Comprehensive Income (Loss) [Abstract]	'
Comprehensive Income (Loss) Note	'
	Other Comprehensive Income (Loss)
	The following table summarizes the changes in accumulated other comprehensive income (loss) by component for the fiscal year ended September 30, 2013 (in millions):
		Deferred Loss on Cash Flow Hedges			Defined Benefit Pension and Postretirement Plans			Foreign Currency Items			Total (1)
	Balance at September 30, 2012	$	(0.2	)	$	(547.8	)	$	47.5		$	(500.5	)
	Other comprehensive income (loss) before reclassifications	—			190.4			(15.0		)	175.4
	Amounts reclassified from accumulated other comprehensive income	—			24.5			—			24.5
	Net current period other comprehensive income (loss)	—			214.9			(15.0		)	199.9
	Balance at September 30, 2013	$	(0.2	)	$	(332.9	)	$	32.5		$	(300.6	)
	(1)     All amounts are net of tax and noncontrolling interest.
	The following table summarizes the reclassifications out of accumulated other comprehensive income by component for the year ended September 30, 2013 (in millions):
		Year Ended September 30,
		2013
		Pretax			Tax			Net of Tax
	Amortization of defined benefit pension and postretirement items (1)
	Actuarial losses(2)	(38.6		)	15			(23.6		)
	Prior service costs (2)	(1.5		)	0.6			(0.9		)
	Total reclassifications for the period	$	(40.1	)	$	15.6		$	(24.5	)
	(1)	Amounts in parentheses indicate charges to earnings. Amounts pertaining to noncontrolling interests are excluded.
	(2)	These accumulated other comprehensive income components are included in the computation of net periodic pension cost. See “Note 12. Retirement Plans” for additional details.
	A summary of the components of other comprehensive income (loss) for the years ended September 30, 2013, 2012 and 2011, is as follows (in millions):
	Fiscal 2013	Pre-Tax			Tax			Net of Tax
		Amount						Amount
	Foreign currency translation loss	$	(15.1	)	$	—		$	(15.1	)
	Net actuarial gain arising during period	303.9			(119.8		)	184.1
	Amortization of net actuarial loss	39.3			(15.1		)	24.2
	Prior service credit arising during the period	5.2			(2.0		)	3.2
	Amortization of prior service cost	1.5			(0.6		)	0.9
	Other adjustments	—			4.2			4.2
	Consolidated other comprehensive income	334.8			(133.3		)	201.5
	Less: Other comprehensive income attributable to noncontrolling interests	(1.6		)	—			(1.6		)
	Other comprehensive income attributable to Rock-Tenn Company shareholders	$	333.2		$	(133.3	)	$	199.9
	Fiscal 2012	Pre-Tax			Tax			Net of Tax
		Amount						Amount
	Foreign currency translation gain	$	18.3		$	—		$	18.3
	Net deferred loss on cash flow hedges	(0.1		)	0.1			—
	Reclassification adjustment of net loss on cash flow hedges included in earnings	2.3			(0.9		)	1.4
	Net actuarial loss arising during period	(375.0		)	140.8			(234.2		)
	Amortization of net actuarial loss	21.4			(8.1		)	13.3
	Prior service cost arising during period	(2.2		)	0.8			(1.4		)
	Amortization of prior service cost	0.7			(0.3		)	0.4
	Consolidated other comprehensive loss	(334.6		)	132.4			(202.2		)
	Less: Other comprehensive loss attributable to noncontrolling interests	0.9			—			0.9
	Other comprehensive loss attributable to Rock-Tenn Company shareholders	$	(333.7	)	$	132.4		$	(201.3	)
	Fiscal 2011	Pre-Tax			Tax			Net of Tax
		Amount						Amount
	Foreign currency translation loss	$	(13.0	)	$	0.1		$	(12.9	)
	Net deferred loss on cash flow hedges	(0.4		)	0.1			(0.3		)
	Reclassification adjustment of net loss on cash flow hedges included in earnings	6.9			(2.9		)	4
	Net actuarial loss arising during period	(336.0		)	124.8			(211.2		)
	Amortization of net actuarial loss	18.9			(6.7		)	12.2
	Prior service credit arising during period	0.3			—			0.3
	Amortization of prior service cost	0.7			(0.3		)	0.4
	Consolidated other comprehensive loss	(322.6		)	115.1			(207.5		)
	Less: Other comprehensive loss attributable to noncontrolling interests	0.5			—			0.5
	Other comprehensive loss attributable to Rock-Tenn Company shareholders	$	(322.1	)	$	115.1		$	(207.0	)

Inventories

Inventories	12 Months Ended
	Sep. 30, 2013
Inventories [Abstract]	'
Inventories	'
	Inventories
	Inventories are as follows (in millions):
		September 30,
		2013			2012
	Finished goods and work in process	$	370.9		$	325.4
	Raw materials	453.6			372.7
	Supplies and spare parts	194			197.1
	Inventories at FIFO cost	1,018.50			895.2
	LIFO reserve	(80.6		)	(33.3		)
	Net inventories	$	937.9		$	861.9
	It is impracticable to segregate the LIFO reserve between raw materials, finished goods and work in process. In fiscal 2013, 2012 and 2011, we reduced inventory quantities in some of our LIFO pools. This reduction results in a liquidation of LIFO inventory quantities generally carried at lower costs prevailing in prior years as compared with the cost of the purchases in the respective fiscal years, the effect of which typically decreases cost of goods sold. The impact of the liquidations in fiscal 2013, 2012 and 2011 was not significant.

Acquisitions

Acquisitions	12 Months Ended
	Sep. 30, 2013
Acquisitions [Abstract]	'
Acquisitions	'
	Acquisitions
	Mid South Packaging Acquisition
	On June 22, 2012, we acquired the assets of Mid South Packaging LLC, a specialty corrugated packaging manufacturer with operations in Cullman, AL, and Olive Branch, MS. The purchase price was approximately $32.1 million. No debt was assumed. We acquired the Mid South business as part of our announced strategy to seek acquisitions that increase our integration levels in the corrugated markets. We have included the results of Mid South's operations since the date of acquisition in our consolidated financial statements in our Corrugated Packaging segment. The acquisition included $9.9 million of customer relationship intangible assets and $8.5 million of goodwill. We are amortizing the customer relationship intangibles over 12.5 years based on a straight-line basis because the pattern was not reliably determinable. None of the intangibles have a significant residual value. The fair value assigned to goodwill is primarily attributable to buyer-specific synergies expected to arise after the acquisition (e.g., enhanced geographic reach of the combined organization, increased vertical integration) and the assembled work force of Mid South. We expect the goodwill to be amortizable for income tax purposes.
	GMI Acquisition
	On October 28, 2011, we acquired the stock of four entities doing business as GMI. We have made joint elections under section 338(h)(10) of the Internal Revenue Code of 1986, as amended (the “Code”), that increased our tax basis in the underlying assets acquired. The purchase price was approximately $90.2 million, including the amount paid to the sellers related to the Code section 338(h)(10) elections. There was no debt assumed. We acquired the GMI business to expand our presence in the corrugated markets. The acquisition also increases our vertical integration. We have included the results of GMI's operations since the date of acquisition in our consolidated financial statements in our Corrugated Packaging segment. The acquisition included $39.5 million of customer relationship intangible assets, $25.0 million of goodwill and $2.1 million of net unfavorable lease contracts. We are amortizing the customer relationship intangibles over 11 to 12 years based on a straight-line basis because the pattern was not reliably determinable and amortizing the lease contracts over 2 to 10 years. None of the intangibles have a significant residual value. The fair value assigned to goodwill is primarily attributable to buyer-specific synergies expected to arise after the acquisition (e.g., enhanced geographic reach of the combined organization, increased vertical integration) and the assembled work force of GMI. We expect the goodwill to be amortizable for income tax purposes.
	Smurfit-Stone Acquisition
	On May 27, 2011, we completed our acquisition of Smurfit-Stone Container Corporation. We have included in our financial statements the results of Smurfit-Stone's containerboard mill and corrugated converting operations in our Corrugated Packaging segment, Smurfit-Stone's recycling operations in our Recycling segment and Smurfit-Stone's display operations in our Merchandising Displays segment. We acquired Smurfit-Stone in order to expand our corrugated packaging business as we believe the containerboard and corrugated packaging industry is a very attractive business and U.S. virgin containerboard is a strategic global asset. The purchase price for the acquisition was $4,919.1 million, net of cash acquired of $473.5 million. The purchase price included cash consideration, net of cash acquired of $1,303.4 million, the issuance of approximately 31.0 million shares of RockTenn common stock valued at $2,378.8 million, including approximately 0.7 million shares reserved but unissued for the resolution of Smurfit-Stone bankruptcy claims, we assumed $1,180.5 million of debt and recorded $56.4 million for stock options to replace outstanding Smurfit-Stone stock options as discussed in “Note 14. Share-Based Compensation”. The reserved shares, as well as the restricted cash identified on our Consolidated Balance Sheets, will be distributed as claims are liquidated or resolved in accordance with the Smurfit-Stone Plan of Reorganization and Confirmation Order and the corresponding liability will be extinguished. The shares issued were valued at $76.735 per share which represented the average of the high and low stock price on the acquisition date. At September 30, 2013, approximately 0.2 million reserved shares remain unissued. We entered into a new credit facility and amended our receivables-backed financing facility at the time of the Smurfit-Stone Acquisition. For information on our facilities see “Note 8. Debt”.
	The following table summarizes the estimated fair values of the assets acquired and liabilities assumed by major class of assets and liabilities as of the acquisition date, as well as adjustments made during fiscal 2012 (referred to as “measurement period adjustments”) (in millions):
		Amounts Recognized as of Acquisition Date(1)				Measurement Period Adjustments(2)			Amounts Recognized as of Acquisition Date (as adjusted)(3)
	Current assets, net of cash acquired	$	1,459.50			$	(6.8	)	$	1,452.70
	Property, plant and equipment	4,391.40				(12.1		)	4,379.30
	Goodwill	1,091.60				(10.9		)	1,080.70
	Intangible assets	691.4				21.7			713.1
	Other long-term assets	95.5				19			114.5
	Total assets acquired	7,729.40				10.9			7,740.30
	Current portion of debt	9.4				—			9.4
	Current liabilities	816.7				6.6			823.3
	Long-term debt due after one year	1,171.10				—			1,171.10
	Accrued pension and other long-term benefits	1,205.80				(4.1		)	1,201.70
	Noncontrolling interest and other long-term liabilities	787.8				8.4			796.2
	Total liabilities and noncontrolling interest assumed	3,990.80				10.9			4,001.70
	Net assets acquired	$	3,738.60			$	—		$	3,738.60
	(1)	As previously reported in the Notes to Consolidated Financial Statements included in our Fiscal 2011 Form 10-K.
	(2)	The measurement period adjustments recorded in fiscal 2012 did not have a significant impact on our condensed consolidated statements of income for any period of fiscal 2012 or 2011. In addition, these adjustments did not have a significant impact on our condensed consolidated balance sheet as of September 30, 2011. Therefore, we recorded the cumulative impact in fiscal 2012 and did not retrospectively adjust the comparative 2011 financial information presented herein.
	(3)	The measurement period adjustments were due primarily to refinements of third party appraisals related to certain property, plant and equipment and intangible assets and related estimated useful lives as well as adjustments to certain tax accounts based on among other things, adjustments to deferred tax liabilities including the recent appraisal adjustments, analysis of the tax basis of acquired assets and liabilities and other tax adjustments. The net impact of the measurement period adjustments resulted in a net decrease to goodwill.
	We recorded fair values for acquired assets and liabilities including goodwill and intangibles. The fair value assigned to goodwill is primarily attributable to buyer-specific synergies expected to arise after the acquisition (e.g., enhanced geographic reach of the combined organization, increased vertical integration opportunities and diversification of fiber sourcing) and the assembled work force of Smurfit-Stone.
	The following table summarizes the weighted average life and gross carrying amount relating to intangible assets recognized in the Smurfit-Stone Acquisition, excluding goodwill (in millions, except weighted avg. life):
		Weighted Avg. Life		Gross Carrying Amount
	Customer relationships	10.5		$	663
	Favorable contracts	6.9		23.5
	Technology and patents	8		13.3
	Trademarks and tradenames	3.5		10.3
	Non-compete agreements	2		3
	Total	10.2		$	713.1
	None of the intangibles has significant residual value. We are amortizing the intangibles over estimated useful lives ranging from 1 to 18 years based on the approximate pattern in which the economic benefits are consumed or straight-line if the pattern was not reliably determinable.
	The following unaudited pro forma information reflects our consolidated results of operations as if the acquisition had taken place on October 1, 2009. The unaudited pro forma information is not necessarily indicative of the results of operations that we would have reported had the transaction actually occurred at the beginning of these periods nor is it necessarily indicative of future results. The unaudited pro forma financial information does not reflect the impact of future events that may occur after the acquisition, including, but not limited to, anticipated costs savings from synergies or other operational improvements (in millions).
		Year Ended September 30,
		2011
		(Unaudited)
	Net sales	$	9,574.50
	Net income attributable to Rock-Tenn Company shareholders	$	341.1
	Fiscal 2011 revenues associated with the Smurfit-Stone Acquisition since the acquisition were $2,273.7 million. Disclosure of earnings associated with the Smurfit-Stone Acquisition since the date acquired for fiscal 2011 is not practicable as it is not being operated as a standalone business.
	The unaudited pro forma financial information presented in the table above has been adjusted to give effect to adjustments that are: directly related to the business combination; factually supportable; and expected to have a continuing impact. These adjustments include, but are not limited to, the application of our accounting policies; elimination of related party transactions; depreciation and amortization related to fair value adjustments to property, plant and equipment and intangible assets including contracts assumed; and interest expense on acquisition-related debt.
	Unaudited pro forma earnings for fiscal 2011 were adjusted to exclude $59.4 million of acquisition inventory step-up expense, $97.8 million of employee compensation related items consisting primarily of certain change in control payments and acceleration of stock-based compensation, $48.2 million of acquisition costs which primarily consist of advisory, legal, accounting, valuation and other professional or consulting fees, and $81.5 million of loss on extinguishment of debt. Included in earnings for fiscal 2011 are $35.9 million of integration related costs which primarily consist of severance and other employee costs and professional services.

Restructuring_and_Other_Costs_

Restructuring and Other Costs, Net	12 Months Ended
	Sep. 30, 2013
Restructuring and Other Costs, Net [Abstract]	'
Restructuring and Other Costs, Net	'
	Restructuring and Other Costs, Net
	Summary of Restructuring and Other Initiatives
	We recorded pre-tax restructuring and other costs, net, of $78.0 million, $75.2 million and $93.3 million for fiscal 2013, 2012 and 2011, respectively. Of these costs, $18.6 million, $14.8 million and $17.7 million were non-cash for fiscal 2013, 2012 and 2011, respectively. These amounts are not comparable since the timing and scope of the individual actions associated with each restructuring, acquisition or integration can vary. When we close a facility, if necessary, we recognize an impairment charge primarily to reduce the carrying value of equipment or other property to their estimated fair value less cost to sell, and record charges for severance and other employee related costs. Any subsequent change in fair value, less cost to sell prior to disposition, is recognized as identified; however, no gain is recognized in excess of the cumulative loss previously recorded. At the time of each announced closure, we generally expect to record future charges for equipment relocation, facility carrying costs, costs to terminate a lease or contract before the end of its term and other employee related costs. Although specific circumstances vary, our strategy has generally been to consolidate our sales and operations into large well-equipped plants that operate at high utilization rates and take advantage of available capacity created by operational excellence initiatives. Therefore, we transfer a substantial portion of each plant’s assets and production to our other plants. We believe these actions have allowed us to more effectively manage our business. The following table presents a summary of restructuring and other charges, net, related to active restructuring and other initiatives that we incurred during the fiscal year, the cumulative recorded amount since we announced the initiative, and the total we expect to incur (in millions):
	Segment		Period		Net Property,				Severance				Equipment			Facility		Other			Total
					Plant and				and Other				and Inventory			Carrying		Costs
					Equipment (a)				Employee				Relocation			Costs
									Related				Costs
									Costs
	Corrugated		Fiscal 2013		$	10.4			$	23.5			$	5		$	4.7	$	(0.1	)	$	43.5
	Packaging(b)
			Fiscal 2012		16.6				10.5				3.5			5.6		4.7			40.9
			Fiscal 2011		16.7				7.8				1.2			1.1		0.7			27.5
			Cumulative		44.1				42.3				9.7			11.4		5.4			112.9
			Expected Total		44.1				42.3				10.9			14.6		5.4			117.3
	Consumer Packaging(c)		Fiscal 2013		2.6				0.6				0.1			0.2		—			3.5
			Fiscal 2012		(3.4		)		0.2				0.6			0.2		—			(2.4		)
			Fiscal 2011		1				2.3				0.9			0.7		0.2			5.1
			Cumulative		3.4				3.9				1.7			1.1		0.9			11
			Expected Total		3.4				3.9				1.7			1.1		0.9			11
	Recycling(d)		Fiscal 2013		5.5				1.2				0.2			0.8		2.6			10.3
			Fiscal 2012		1.6				0.3				—			0.1		0.3			2.3
			Fiscal 2011		—				—				—			0.1		—			0.1
			Cumulative		7.2				1.5				0.2			1.2		2.9			13
			Expected Total		7.2				1.5				0.5			2		3			14.2
	Other(e)		Fiscal 2013		0.1				0.2				0.1			—		20.3			20.7
			Fiscal 2012		—				—				—			—		34.4			34.4
			Fiscal 2011		—				—				—			—		60.6			60.6
			Cumulative		0.1				0.2				0.1			—		115.3			115.7
			Expected Total		0.1				0.2				0.1			—		115.3			115.7
	Total		Fiscal 2013		$	18.6			$	25.5			$	5.4		$	5.7	$	22.8		$	78
			Fiscal 2012		$	14.8			$	11			$	4.1		$	5.9	$	39.4		$	75.2
			Fiscal 2011		$	17.7			$	10.1			$	2.1		$	1.9	$	61.5		$	93.3
			Cumulative		$	54.8			$	47.9			$	11.7		$	13.7	$	124.5		$	252.6
			Expected Total		$	54.8			$	47.9			$	13.2		$	17.7	$	124.6		$	258.2
	(a)	“Net property, plant and equipment” as used in this Note 6 is the sum of property, plant and equipment impairment losses, subsequent adjustments to fair value for assets classified as held for sale, subsequent (gains) or losses on sales of property, plant and equipment, related parts and supplies, and accelerated depreciation on such assets.
	(b)	The Corrugated Packaging segment current year charges are primarily associated with the closure of seven corrugated container plants acquired in the Smurfit-Stone Acquisition, on-going closure costs at previously closed facilities including the Matane, Quebec containerboard mill also acquired in the Smurfit-Stone Acquisition which were partially offset by gains on sale of previously closed facilities. The Corrugated Packaging segment charges in fiscal 2012 primarily reflect the closure of our Matane, Quebec containerboard mill, a machine taken out of operation at our Hodge, LA containerboard mill and seven corrugated container plants, all acquired in the Smurfit-Stone Acquisition and charges associated primarily with on-going closure costs at previously closed corrugated container plants acquired in the Smurfit-Stone Acquisition and our legacy Hauppauge, NY sheet plant, net of a gain on sale in fiscal 2012 primarily for our Santa Fe Springs, CA corrugated converting facility. The Corrugated Packaging Segment charges in fiscal 2011 primarily reflect the closure of six corrugated container plants also acquired in the Smurfit-Stone Acquisition. The fiscal 2012 expenses in the “Other Costs” column primarily represent repayment of energy credits and site environmental closure activities at the Matane mill. The cumulative charges primarily reflect charges associated with the closure of twenty corrugated container plants acquired in the Smurfit-Stone Acquisition, the closure of the Matane, Quebec containerboard mill, charges related to kraft paper assets at our Hodge containerboard mill we acquired in the Smurfit-Stone Acquisition, and gains and losses associated with the sale of closed facilities. We have transferred a substantial portion of each closed facility's production to our other facilities.
	(c)	The Consumer Packaging segment current year charges are primarily associated with the closure of a converting facility and on-going closure costs for previously closed facilities. The Consumer Packaging segment charges in fiscal 2012 primarily reflect the gain on sale of our Columbus, IN laminated paperboard converting operation and Milwaukee, WI folding carton facility and on-going closure costs associated with previously closed facilities. The Consumer Packaging segment charges in fiscal 2011 primarily reflect the closure of two facilities and on-going closure costs for previously closed facilities. The cumulative charges primarily reflect the actions mentioned above as well as closure costs at certain of five interior packaging plants. We have transferred a substantial portion of each closed facility's production to our other facilities.
	(d)	The Recycling segment current year charges are primarily associated with the closure of nine collection facilities acquired in the Smurfit-Stone Acquisition partially offset by the gain on sale of our Dallas, TX collection facility. The Recycling segment charges in fiscal 2012 primarily reflect the closure of six collection facilities also acquired in the Smurfit-Stone Acquisition and the cumulative charges reflect the preceding actions as well as carrying costs for two collections facilities shutdown in a prior year.
	(e)	The expenses in the “Other” segment primarily reflect costs that we consider as Corporate, including the “Other Costs” column which primarily reflects costs incurred as a result of our Smurfit-Stone Acquisition, including merger integration expenses. Also included in the “Other” segment are insignificant costs related to our Merchandising Displays segment. The pre-tax charges are summarized below (in millions):
		Acquisition				Integration				Other Expense (Income)				Total
		Expense / (Income)				Expenses
	Fiscal 2013	$	(3.6	)		$	23.9			$	0.4			$	20.7
	Fiscal 2012	2.9				32.1				(0.6		)		34.4
	Fiscal 2011	20.2				40.4				—				60.6
	Acquisition expenses include expenses associated with acquisitions, whether consummated or not, as well as litigation expenses associated with the Smurfit-Stone Acquisition, net of recoveries. Acquisition expenses primarily consist of advisory, legal, accounting, valuation and other professional or consulting fees. Integration expenses reflect primarily severance and other employee costs, professional services including work being performed to facilitate the Smurfit-Stone integration including information systems integration costs, lease expense and other costs. Due to the complexity and duration of the integration activities the precise amount expected to be incurred has not been quantified above. We expect integration activities to continue into fiscal 2014.
	The following tables represent a summary of and the changes in the restructuring accrual, which is primarily composed of lease commitments, accrued severance and other employee costs, as well as a reconciliation of the restructuring accrual to the line item “Restructuring and other costs, net” on our consolidated statements of income for fiscal 2013, 2012 and 2011 (in millions):
		2013				2012				2011
	Accrual at beginning of fiscal year	$	22.7			$	26.7			$	1.4
	Accruals acquired in Smurfit-Stone Acquisition	—				—				9.2
	Additional accruals	18.7				26.9				30.8
	Payments	(20.6		)		(28.0		)		(14.4		)
	Adjustment to accruals	1				(2.9		)		(0.3		)
	Accrual at September 30,	$	21.8			$	22.7			$	26.7
	Reconciliation of accruals and charges to restructuring and other costs, net:
		2013				2012				2011
	Additional accruals and adjustments to accruals (see table above)	$	19.7			$	24			$	30.5
	Acquisition (income) expense	(3.6		)		2.9				20.2
	Integration expenses	22.8				23				20.2
	Net property, plant and equipment	18.6				14.8				17.7
	Severance and other employee costs	10.1				0.6				0.3
	Equipment relocation	5.4				4.1				2.1
	Facility carrying costs	5.7				5.9				1.9
	Other	(0.7		)		(0.1		)		0.4
Total restructuring and other costs, net	$	78			$	75.2			$	93.3

Other_Intangible_Assets

Other Intangible Assets	12 Months Ended
	Sep. 30, 2013
Other Intangible Assets [Abstract]	'
Other Intangible Assets	'
	Other Intangible Assets
	The gross carrying amount and accumulated amortization relating to intangible assets, excluding goodwill, is as follows (in millions, except weighted avg. life):
				September 30,
				2013					2012
		Weighted		Gross  Carrying		Accumulated			Gross  Carrying		Accumulated
		Avg. Life		Amount		Amortization			Amount		Amortization
	Customer relationships	11.8		$	876.5	$	(230.4	)	$	873.9	$	(153.6	)
	Favorable contracts	11.8		23.9		(14.3		)	42.2		(18.8		)
	Technology and patents	8		14.3		(4.8		)	14.3		(3.2		)
	Trademarks and tradenames	33.9		30.2		(9.8		)	30.3		(6.4		)
	Non-compete agreements	N/A		—		—			5.1		(4.1		)
	License costs	10		15.9		(2.1		)	15.9		(0.5		)
	Total	12.4		$	960.8	$	(261.4	)	$	981.7	$	(186.6	)
	During fiscal 2013, 2012 and 2011, intangible amortization expense was $80.7 million, $88.9 million and $42.4 million, respectively. Estimated intangible asset amortization expense for the succeeding five fiscal years is as follows (in millions):
	Fiscal 2014	$	85.4
	Fiscal 2015	81.5
	Fiscal 2016	80.9
	Fiscal 2017	80.7
	Fiscal 2018	80.6

Debt

Debt	12 Months Ended
	Sep. 30, 2013
Debt [Abstract]	'
Debt	'
	Debt
	At September 30, 2013, our Credit Facility and our March 2019 Notes, March 2020 Notes, March 2022 Notes and March 2023 Notes (each as hereinafter defined, the notes collectively “Our Notes”) were unsecured. Our Notes are unsecured unsubordinated obligations that rank equally in right of payment with all of our existing and future unsecured unsubordinated obligations. The notes are effectively subordinated to any of our existing and future secured debt to the extent of the value of the assets securing such debt. Our Notes are redeemable prior to maturity, subject to certain rules and restrictions, and are not subject to any sinking fund requirements. Our Notes are fully and unconditionally guaranteed by our existing and future wholly-owned U.S. subsidiaries, except for certain present and future unrestricted subsidiaries and certain other limited exceptions. The indentures related to Our Notes restrict us and our subsidiaries from incurring certain liens and entering into certain sale and leaseback transactions, subject to a number of exceptions. Interest on Our Notes is payable in arrears each September and March. During the quarter ended March 31, 2013, we conducted offers to exchange the March 2019 Notes, March 2020 Notes, March 2022 Notes and March 2023 Notes for new notes of the applicable series with terms substantially identical with the notes of such series that are registered under the Securities Act of 1933, as amended (the “Securities Act”). In the exchange offer, $350.0 million in aggregate principal amount of the March 2019 Notes, $350.0 million in aggregate principal amount of the March 2020 Notes, $399.0 million in aggregate principal amount of the March 2022 Notes and $350.0 million in aggregate principal amount of the March 2023 Notes were validly tendered and subsequently exchanged (“Exchanged Notes”).
	The following were individual components of debt (in millions):
		September 30,
		2013				2012
	5.625% notes due March 2013(a)	$	—			$	80.6
	4.45% notes due March 2019(b)	349.7				349.7
	3.50% notes due March 2020(c)	347.5				347.1
	4.90% notes due March 2022(b)	399.4				399.3
	4.00% notes due March 2023(c)	346.6				346.3
	Term loan facility (d)	947.5				1,222.60
	Revolving credit and swing facilities(d)	184.3				242.3
	Receivables-backed financing facility(e)	260				410
	Other debt	9.8				14.6
	Total debt	2,844.80				3,412.50
	Less current portion of debt	2.9				261.3
	Long-term debt due after one year	$	2,841.90			$	3,151.20
	A portion of the debt classified as long-term, which includes the term loan, receivables-backed, revolving credit and swing facilities, may be paid down earlier than scheduled at our discretion without penalty. During fiscal 2013, 2012 and 2011, amortization of debt issuance costs charged to interest expense was $10.2 million, $10.8 million and $7.7 million, respectively.
	(a)	In March 2003, we sold $100.0 million in aggregate principal amount of our 5.625% notes due March 2013 (“March 2013 Notes”). We incurred debt issuance costs of approximately $0.8 million which were amortized over the term of the notes. In the first quarter of fiscal 2010, we repurchased $19.5 million of our March 2013 Notes at an average price of approximately 98% of par and recorded an aggregate gain on extinguishment of debt of approximately $0.5 million. On March 15, 2013, we repaid our remaining March 2013 Notes upon maturity.
	(b)	On February 22, 2012, we issued $350.0 million aggregate principal amount of 4.45% senior notes due March 2019 (“March 2019 Notes”) and issued $400.0 million aggregate principal amount of 4.90% senior notes due March 2022 (“March 2022 Notes”) in an unregistered offering pursuant to Rule 144A and Regulation S under the Securities Act. We issued the March 2019 Notes and March 2022 Notes at a discount of approximately $0.3 million and $0.8 million, respectively, and recorded debt issuance costs, including the exchange offer, of approximately $3.0 million and $3.5 million respectively, which are being amortized over the respective term of the notes. Giving effect to the amortization of the original issue discount and the debt issuance costs, the effective interest rates of the March 2019 Notes and March 2022 Notes are approximately 4.59% and 5.01%, respectively.
	(c)	On September 11, 2012, we issued $350.0 million aggregate principal amount of 3.50% senior notes due March 2020 (“March 2020 Notes”) and issued $350.0 million aggregate principal amount of 4.00% senior notes due March 2023 (“March 2023 Notes”) in an unregistered offering pursuant to Rule 144A and Regulation S under the Securities Act. We issued the March 2020 and March 2023 notes at a discount of approximately $3.0 million and $3.7 million, respectively, and recorded debt issuance costs, including the exchange offer, of approximately $2.9 million and $3.0 million, respectively, which are being amortized over the respective term of the notes. Giving effect to the amortization of the original issue discount and the debt issuance costs, the effective interest rates of the March 2020 and March 2023 Notes are approximately 3.72% and 4.18%, respectively.
	(d)	On September 27, 2012, we entered into an unsecured Amended and Restated Credit Agreement with an original maximum principal amount of approximately $2.7 billion before scheduled payments. The Credit Facility includes a $1.475 billion, 5-year revolving credit facility and a $1.223 billion, 5-year term loan facility. All obligations under the Credit Facility are fully and unconditionally guaranteed by our existing and future wholly-owned U.S. subsidiaries, except for certain present and future unrestricted subsidiaries and certain other limited exceptions. In addition, the obligations of Rock-Tenn Company of Canada, Inc. are guaranteed by Rock-Tenn Company and all such wholly-owned U.S. subsidiaries, as well as by wholly-owned Canadian subsidiaries of RockTenn, other than certain present and future unrestricted subsidiaries and certain other limited exceptions.
	In December 2012, in connection with the amendment of our receivables-backed financing facility, we prepaid our term loan facility through December 2014 with borrowings under our Receivables Facility, our revolving credit facility and available cash. Effective May 3, 2013, we exercised the Leverage Reduction Option which reduced our maximum permitted Leverage Ratio to 3.5 times and decreased our Applicable Percentage 25 basis points (each as defined in the Credit Facility). On June 7, 2013, we amended the Credit Facility to, among other things, modified the EBITDA definition, including but not limited to, allowing for add backs associated with proactive pension actions, synergies associated with future acquisitions and certain business interruptions covered by third parties and permitted a future $200 million Mexican peso sub-facility with dollar for dollar reduction to existing commitments if activated.
	Up to $250.0 million under the revolving credit facility may be used for the issuance of letters of credit. In addition, up to $350.0 million of the revolving credit facility may be used to fund borrowings in Canadian dollars. At September 30, 2013 and September 30, 2012, the amount committed under the credit facilities for loans to a Canadian subsidiary was $300.0 million and $300.0 million, respectively. At September 30, 2013, available borrowings under the revolving credit portion of the Credit Facility, reduced by certain outstanding letters of credit not drawn upon of approximately $48.6 million and the application of our maximum leverage ratio subject to the facility limit, exceeded $1.2 billion.
	At our option, borrowings under the Credit Facility bear interest at either a base rate or at the London Interbank Offered Rate (“LIBOR”), plus, in each case, an applicable margin. In addition, advances in Canadian dollars may be made by way of purchases of bankers' acceptances. We are required to pay fees in respect of outstanding letters of credit at a rate equal to the applicable margin for LIBOR-based borrowings based upon a Credit Agreement Leverage Ratio. The following table summarizes the applicable margins and percentages related to the revolving credit facility and term loan of the Credit Facility:
		Range		September 30,
				2013
	Applicable margin/percentage for determining:
	LIBOR-based loans and banker's acceptance advances interest rate (1)	1.125%-1.750%		1.25	%
	Base rate-based borrowings (1)	0.125%-0.750%		0.25	%
	Facility commitment (2)	0.175%-0.300%		0.2	%
	(1)	The rates vary based on our Leverage Ratio, as defined in the Amended and Restated Credit Agreement.
	(2)	Applied to the aggregate borrowing availability based on the Leverage Ratio, as defined below.
	Following the submission of our September 30, 2013 quarterly officer's compliance certificate when our Form 10-K is filed, our applicable margins in the table above will fall for each measure to the low end of the range. The variable interest rate, including the applicable margin, on our term loan facility was 1.43% at September 30, 2013. Interest rates on our revolving credit facility for borrowings both in the U.S. and Canada ranged from 2.55% to 3.50% at September 30, 2013.
	The Credit Facility contains certain prepayment requirements and customary affirmative and negative covenants. The negative covenants include covenants that, subject to certain exceptions, contain: limitations on liens and further negative pledges; limitations on sale-leaseback transactions; limitations on debt and prepayments, redemptions or repurchases of certain debt and equity; limitations on mergers and asset sales; limitations on sales, transfers and other dispositions of assets; limitations on loans and certain other investments; limitations on restrictions affecting subsidiaries; limitations on transactions with affiliates; limitations on changes to accounting policies or fiscal periods; limitations on speculative hedge transactions; and restrictions on modification or waiver of material documents in a manner materially adverse to the lenders.
	In addition, the Credit Facility includes financial covenants requiring that we maintain a maximum total leverage ratio and minimum interest coverage ratio. The terms of the Credit Facility, prior to us exercising the Leverage Reduction Option on May 3, 2013 which reduced our maximum permitted Leverage Ratio to 3.5 times, required us to maintain a leverage ratio (which is the ratio of our total funded debt less certain amounts of unrestricted cash, to Credit Agreement EBITDA, as defined, for the preceding four fiscal quarters “Leverage Ratio”) of not greater than 3.75 to 1.00 for fiscal quarters ending from September 30, 2012 through September 30, 2013, and not greater than 3.50 to 1.00 for fiscal quarters ending thereafter. In addition, we must maintain an interest coverage ratio (which is the ratio of Credit Agreement EBITDA for the preceding four fiscal quarters to cash interest expense for such period) of not less than 3.50 to 1.00 for any fiscal quarters ending on or after September 30, 2012. Credit Agreement EBITDA is calculated in accordance with the definition contained in our Amended and Restated Credit Agreement. Credit Agreement EBITDA is generally defined as consolidated net income of RockTenn for any fiscal period plus the following to the extent such amounts are deducted in determining such consolidated net income: (i) consolidated interest expense, (ii) consolidated tax expenses, (iii) depreciation and amortization expenses, (iv) financing expenses and write-offs, including remaining portions of original issue discount on prepayment of indebtedness, prepayment premiums and commitment fees, (v) inventory expenses associated with the write up of Smurfit-Stone inventory acquired in the merger and other permitted acquisitions, (vi) all other non-cash charges, (vii) all legal, accounting and professional advisory expenses incurred in respect of the Smurfit-Stone Acquisition and other permitted acquisitions and related financing transactions, (vii) certain expenses and costs incurred in connection with the Smurfit-Stone Acquisition and associated synergies, restructuring charges, and certain other charges and expenses, subject to certain limitations specified in the Credit Facility, (viii) certain other charges and expenses unrelated to the Smurfit-Stone Acquisition subject to certain specified limitations in the Credit Facility, and (ix) for certain periods, run-rate synergies expected to be achieved due to the Smurfit-Stone Acquisition not already included in EBITDA and adjustments to include Smurfit-Stone EBITDA as outlined in the Amended and Restated Credit Agreement related to periods prior to the acquisition (“Credit Agreement EBITDA”). We test and report our compliance with these covenants each quarter. We are in compliance with all of our covenants.
	The credit facilities also contain certain customary events of default, including relating to non-payment, breach of representations, warranties or covenants, default on other material debt, bankruptcy and insolvency events, invalidity or impairment of loan documentation, collateral or subordination provisions, change of control and customary ERISA defaults. The term “ERISA” means the Employee Retirement Income Security Act of 1974, as amended, and the rules and regulations thereunder.
	(e)	On December 21, 2012, we amended and increased the Receivables Facility from $625.0 million to $700.0 million, extended the maturity date from the third anniversary of the May 27, 2011 Smurfit-Stone Acquisition to December 18, 2015, and amended, among other things, certain restrictions on what constitutes eligible receivables under the facility and lowered borrowing costs. Except for $51.0 million classified as short-term at September 30, 2012 that was expected to require the use of current assets for repayment, the borrowings are classified as long-term at September 30, 2013 and September 30, 2012. On August 30, 2013, we amended our Receivables Facility to allow for the exclusion of eligible receivables of specific obligors each calendar year subject to the following restrictions: (i) the aggregate of excluded receivables may not exceed 7.5% of eligible receivables under the Receivables Facility, and (ii) the excluded receivables of each obligor may not exceed 2.5% of the aggregate outstanding balance. The borrowing rate, which consists of a blend of the market rate for asset-backed commercial paper and the one month LIBOR rate plus a utilization fee, was 0.95% and 1.34% as of September 30, 2013 and September 30, 2012, respectively. The commitment fee for this facility was 0.25% and 0.30% as of September 30, 2013 and September 30, 2012, respectively. Borrowing availability under this facility is based on the eligible underlying accounts receivable and certain covenants. The agreement governing the Receivables Facility contains restrictions, including, among others, on the creation of certain liens on the underlying collateral. We test and report our compliance with these covenants monthly. We are in compliance with all of our covenants. At September 30, 2013 and September 30, 2012, maximum available borrowings, excluding amounts outstanding, under this facility were approximately $700.0 million and $464.0 million, respectively. The carrying amount of accounts receivable collateralizing the maximum available borrowings at September 30, 2013 was approximately $942.5 million. We have continuing involvement with the underlying receivables as we provide credit and collections services pursuant to the securitization agreement.
	As of September 30, 2013, the aggregate maturities of debt for the succeeding five fiscal years and thereafter are as follows (in millions):
	Fiscal 2014	$	2.9
	Fiscal 2015	91.8
	Fiscal 2016	382.3
	Fiscal 2017	917.9
	Fiscal 2018	—
	Thereafter	1,456.70
	Unamortized bond discount	(6.8		)
	Total debt	$	2,844.80

Fair_Value

Fair Value	12 Months Ended
	Sep. 30, 2013
Fair Value [Abstract]	'
Fair Value	'
	Fair Value
	Assets and Liabilities Measured or Disclosed at Fair Value
	ASC 820 provides a framework for measuring fair value and expands disclosures required about fair value measurements. Specifically, ASC 820 sets forth a definition of fair value and a hierarchy prioritizing the inputs to valuation techniques. ASC 820 defines fair value as the price that would be received from the sale of an asset or paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. Additionally, ASC 820 defines levels within the hierarchy based on the availability of quoted prices for identical items in active markets, similar items in active or inactive markets and valuation techniques using observable and unobservable inputs. We incorporate credit valuation adjustments to reflect both our own nonperformance risk and the respective counterparty’s nonperformance risk in our fair value measurements.
	We have, or from time to time may have, supplemental retirement savings plans that are nonqualified deferred compensation plans pursuant to which assets are invested primarily in mutual funds, interest rate derivatives, commodity derivatives or other similar classes of assets or liabilities. Other than our pension and postretirement assets and liabilities as disclosed in “Note 12. Retirement Plans” and the fair value of our long-term debt disclosed below, the fair value of these items is not significant.
	The following table summarizes the carrying amount and estimated fair value of our long-term debt (in millions):
		September 30, 2013				September 30, 2012
		Carrying Amount		Fair		Carrying Amount		Fair
				Value				Value
	March 2013 Notes(1)	$	—	$	—	$	80.6	$	81.7
	March 2019 Notes(1)	349.7		371.9		349.7		376.6
	March 2020 Notes(1)	347.5		343		347.1		356.3
	March 2022 Notes(1)	399.4		413.7		399.3		434
	March 2023 Notes(1)	346.6		338.6		346.3		357.7
	Term loan facilities(2)	947.5		947.5		1,222.60		1,222.60
	Revolving credit and swing facilities(2)	184.3		184.3		242.3		242.3
	Receivables-backed financing facility(2)	260		260		410		410
	Other long-term debt(2)(3)	9.8		10.1		14.6		15.4
	Total debt	$	2,844.80	$	2,869.10	$	3,412.50	$	3,496.60
	-1	Fair value is categorized as level 2 within the fair value hierarchy since the notes trade infrequently. Fair value is based on quoted market prices.
	-2	Fair value approximates the carrying amount as the variable interest rates reprice frequently at observable current market rates. As such, fair value is categorized as level 2 within the fair value hierarchy.
	-3	Fair value for certain debt is estimated based on the discounted value of future cash flows using observable current market interest rates offered for debt of similar credit risk and maturity. As such, fair value is categorized as level 2 within the fair value hierarchy.
	In the absence of quoted prices in active markets, considerable judgment is required in developing estimates of fair value. Estimates are not necessarily indicative of the amounts we could realize in a current market transaction, or the amounts at which we could settle our debt.
	Financial Instruments not Recognized at Fair Value
	Financial instruments not recognized at fair value on a recurring or nonrecurring basis include cash and cash equivalents, accounts receivable, certain other current assets, short-term debt, accounts payable, certain other current liabilities, and long-term debt. With the exception of long-term debt, the carrying amounts of these financial instruments approximate their fair values due to their short maturities.
	Fair Value of Nonfinancial Assets and Nonfinancial Liabilities
	We measure certain nonfinancial assets and nonfinancial liabilities at fair value on a nonrecurring basis. These assets and liabilities include cost and equity method investments when they are deemed to be other-than-temporarily impaired, assets acquired and liabilities assumed in an acquisition or in a nonmonetary exchange, and property, plant and equipment and intangible assets that are written down to fair value when they are held for sale or determined to be impaired. At September 30, 2013 and September 30, 2012, we did not have any significant nonfinancial assets or nonfinancial liabilities that were measured at fair value on a nonrecurring basis in periods subsequent to initial recognition.

Leases

Leases	12 Months Ended
	Sep. 30, 2013
Leases [Abstract]	'
Leases	'
	Leases
	We lease certain manufacturing and warehousing facilities and equipment, primarily transportation equipment, under various operating leases. Some leases contain escalation clauses and provisions for lease renewal. As of September 30, 2013, future minimum lease payments under all noncancelable leases for the succeeding five fiscal years and thereafter are as follows (in millions):
	Fiscal 2014	$	51
	Fiscal 2015	44.3
	Fiscal 2016	35.5
	Fiscal 2017	28.3
	Fiscal 2018	23.6
	Thereafter	72.9
	Total future minimum lease payments	$	255.6
	Rental expense for the years ended September 30, 2013, 2012 and 2011 was approximately $101.5 million, $88.1 million and $42.6 million, respectively, including lease payments under cancelable leases and maintenance charges on transportation equipment. The increase beginning in fiscal 2012 reflects the first full year following the Smurfit-Stone Acquisition.

Income_Taxes

Income Taxes	12 Months Ended
	Sep. 30, 2013
Tax Provision [Abstract]	'
Tax Provision	'
	Income Taxes
	The components of income before income taxes are as follows (in millions):
		Year Ended September 30,
		2013				2012				2011
	United States	$	636.5			$	374.7			$	163.7
	Foreign	74.2				14.4				51.8
	Income before income taxes	$	710.7			$	389.1			$	215.5
	The (benefit) provision for income taxes consists of the following components (in millions):
		Year Ended September 30,
		2013				2012				2011
	Current income taxes:
	Federal	$	(8.3	)		$	(4.5	)		$	(0.4	)
	State	23.7				7.5				0.5
	Foreign	7.1				10.5				9.4
	Total current	22.5				13.5				9.5
	Deferred income taxes:
	Federal	(44.6		)		129.1				55.5
	State	2.6				(0.6		)		1.5
	Foreign	(2.3		)		(5.1		)		3
	Total deferred	(44.3		)		123.4				60
	(Benefit) provision for income taxes	$	(21.8	)		$	136.9			$	69.5
	The differences between the statutory federal income tax rate and our effective income tax rate are as follows:
		Year Ended September 30,
		2013			2012			2011
	Statutory federal tax rate	35	%		35	%		35	%
	Foreign rate differential	(1.9	)		0.2			(2.5	)
	Adjustment and resolution of federal, state and foreign tax uncertainties	(35.9	)		(0.1	)		0.3
	State taxes, net of federal benefit	3.3			3.4			2.3
	Research and development and other tax credits, net of valuation allowances	(1.4	)		(0.5	)		(1.1	)
	Income attributable to noncontrolling interest	(0.2	)		(0.1	)		(0.3	)
	Nondeductible deal fees	—			—			1.3
	Change in valuation allowance	(0.7	)		(1.3	)		—
	Other, net	(1.3	)		(1.4	)		(2.7	)
	Effective (benefit) tax rate	(3.1	)%		35.2	%		32.3	%
	The tax effects of temporary differences that give rise to deferred income tax assets and liabilities consist of the following (in millions):
		September 30,
		2013				2012
	Deferred income tax assets:
	Accruals and allowances	$	23.5			$	25.2
	Employee related accruals and allowances	104.8				107.5
	Pension obligations	333.3				489
	State net operating loss carryforwards	68.3				44.2
	State credit carryforwards, net of federal benefit	49.1				47
	Cellulosic Biofuel Producers Credits and other federal tax credit carryforwards	233.6				225.6
	Federal net operating loss carryforwards	207				146.4
	Restricted stock and options	30.5				22.4
	Other	28.8				21.9
	Valuation allowances	(36.2		)		(42.3		)
	Total	1,042.70				1,086.90
	Deferred income tax liabilities:
	Property, plant and equipment	1,477.20				1,439.00
	Deductible intangibles and goodwill	287				283.8
	Inventory reserves	80.5				80.2
	Deferred gain	31				31
	Other	0.5				0.7
	Total	1,876.20				1,834.70
	Net deferred income tax liability	$	833.5			$	747.8
	Deferred taxes are recorded as follows in the consolidated balance sheet (in millions):
		September 30,
		2013				2012
	Current deferred tax asset	$	209.1			$	104
	Current deferred tax liability	—				0.1
	Long-term deferred tax asset	20.5				37.1
Long-term deferred tax liability	1,063.10				888.8
Net deferred income tax liability	$	833.5			$	747.8
At September 30, 2013 and September 30, 2012, we had gross federal net operating losses of approximately $605.8 million and $418.4 million. These loss carryforwards generally expire between fiscal years 2029 and 2031. The increase in the federal net operating loss during fiscal 2013 is related to the reversal $254.1 million of tax reserves related to alternative fuel mixture credits acquired in the Smurfit-Stone Acquisition. The benefit to deferred tax expense was recorded as the Internal Revenue Service completed its examination of Smurfit-Stone's 2009 tax return.
At September 30, 2013 and September 30, 2012, we had $138.1 million and $145.6 million, respectively, of federal Cellulosic Biofuel Producers Credits carryforwards which expire if not utilized by fiscal 2017. At September 30, 2013 and September 30, 2012, we had alternative minimum tax credits of $79.7 million and $71.8 million, respectively.  Under current tax law, the alternative minimum tax credit carryforwards do not expire.  At September 30, 2013 and September 30, 2012, we had various other federal credit carryforwards of $15.8 million and $8.2 million, respectively, which expire between fiscal years 2018 and 2033.
As a result of certain realization requirements of ASC 718, the table of deferred tax assets and liabilities shown above does not include certain deferred tax assets at September 30, 2013 and 2012 that arose directly from (or the use of which was postponed by) tax deductions related to equity compensation in excess of compensation recognized for financial reporting. Those deferred tax assets include federal and state net operating loss carryforwards. The September 30, 2013 and September 30, 2012 federal net operating loss carryforwards exclude $14.2 million and $10.3 million, respectively, due to stock compensation excess tax benefits. These excluded federal net operating losses, related to fiscal 2011, will be realized and recorded in the period when these carryforwards reduce an income tax liability.
At September 30, 2013 and September 30, 2012, gross net operating losses, for state and local tax reporting purposes, of approximately $1,543 million and $1,160 million, respectively, were available for carryforward. These loss carryforwards generally expire between fiscal years 2014 and 2032. The increase in the state net operating loss during fiscal 2013 is related to the reversal of tax reserves related to AFMC acquired in the Smurfit-Stone Acquisition. The tax effected values of these net operating losses are $68.3 million and $44.2 million at September 30, 2013 and 2012, respectively, exclusive of valuation allowances of $4.4 million and $3.2 million at September 30, 2013 and 2012, respectively.
At September 30, 2013 and September 30, 2012, gross net operating losses for foreign reporting purposes of approximately $112.0 million and $27.3 million, respectively, were available for carryforward. These loss carryforwards generally expire between fiscal years 2016 and 2033. The tax effected values of these net operating losses are $28.8 million and $4.6 million at September 30, 2013 and 2012, respectively, exclusive of valuation allowances of $7.3 million and $4.2 million at September 30, 2013 and 2012, respectively. The increase in the foreign net operating loss during fiscal 2013 is primarily related to a tax law change in Canada.
At September 30, 2013 and 2012, certain allowable state tax credits were available for carryforward. Accordingly, $49.1 million and $47.0 million have been recorded as deferred income tax assets at September 30, 2013 and 2012, respectively. These state tax credit carryforwards generally expire within 5 to 10 years; however, certain state credits can be carried forward indefinitely. Valuation allowances of $24.2 million and $29.9 million at September 30, 2013 and 2012, respectively, have been provided on these assets. These valuation allowances have been recorded due to uncertainty regarding our ability to generate sufficient taxable income in the appropriate taxing jurisdiction.
At September 30, 2013 and September 30, 2012, we had current deferred income taxes of $209.1 million and $104.0 million, respectively, included in other current assets.
The following table represents a summary of the valuation allowances against deferred tax assets for fiscal 2013, 2012 and 2011 (in millions):
	2013				2012				2011
Balance at the beginning of period	$	42.3			$	48			$	40.2
Charges to costs and expenses	3.6				4.3				5.8
Allowances related to acquisitions(1)	—				—				7.8
Deductions	(9.7		)		(10.0		)		(5.8		)
Balance at the end of period	$	36.2			$	42.3			$	48
-1	Allowances related to acquisitions in fiscal 2011 are related to the Smurfit-Stone Acquisition.
We have considered a portion of our earnings from certain foreign subsidiaries as subject to repatriation and we provide for taxes accordingly. Earnings of all other foreign subsidiaries are considered indefinitely invested in their respective foreign operations. As of September 30, 2013, we estimate those indefinitely invested earnings to be approximately $158.3 million. We have not provided for any incremental U.S. taxes that would be due upon the repatriation of those earnings. However, in the event of a distribution of those earnings in the form of dividends or otherwise, we may be subject to both U.S. income taxes, subject to an adjustment for foreign tax credits, and withholding taxes payable to the foreign jurisdictions. As of September 30, 2013, we estimate the amount of unrecognized deferred income tax liability on these indefinitely reinvested earnings to be approximately $7.1 million.
As of September 30, 2013, the total amount of unrecognized tax benefits was approximately $21.3 million, exclusive of interest and penalties. Of this balance, if we were to prevail on all unrecognized tax benefits recorded, approximately $19.2 million would benefit the effective tax rate. As of September 30, 2012, the total amount of unrecognized tax benefits was approximately $289.7 million, exclusive of interest and penalties prior to the fiscal 2013 adjustment following the IRS's completion of its examination of Smurfit-Stone's 2009 tax return. Of this balance, if we were to prevail on all unrecognized tax benefits recorded, approximately $265.6 million would benefit the effective tax rate. We regularly evaluate, assess and adjust the related liabilities in light of changing facts and circumstances, which could cause the effective tax rate to fluctuate from period to period.
A reconciliation of the beginning and ending amount of gross unrecognized tax benefits is as follows (in millions):
	2013				2012				2011
Balance at the beginning of period	$	289.7			$	287.9			$	12.2
(Reductions) additions related to acquisitions(1)	—				(1.4		)		275.5
Additions for tax positions taken in current year	2.6				7				—
(Reductions) additions for tax positions taken in prior years	(268.5		)		—				1.5
Reductions due to settlements	(0.2		)		—				—
Reductions as a result of a lapse of the applicable statute of limitations	(2.3		)		(3.8		)		(1.3		)
Balance at the end of period	$	21.3			$	289.7			$	287.9
-1	Adjustments related to acquisitions in fiscal 2012 and 2011 are related to the Smurfit-Stone Acquisition.
We recognize estimated interest and penalties related to unrecognized tax benefits in income tax expense in the consolidated statements of income. As of September 30, 2013 and September 30, 2012, we had a recorded liability of $1.2 million and $2.0 million, respectively, for the payment of estimated interest and penalties related to the liability for unrecognized tax benefits. Our results of operations for the fiscal years ended September 30, 2013 and 2012 include income of $0.7 million and income of $1.9 million, respectively, related to estimated interest and penalties related to the liability for unrecognized tax benefits.
We file federal, state and local income tax returns in the U.S. and various foreign jurisdictions. With few exceptions, we are no longer subject to U.S. federal, state and local, or non-U.S. income tax examinations by tax authorities for years prior to fiscal 2009. While we believe our tax positions are appropriate, they are subject to audit or other modifications and there can be no assurance that any modifications will not materially and adversely affect our results of operations, financial condition or cash flows.

Retirement_Plans

Retirement Plans	12 Months Ended
	Sep. 30, 2013
Retirement Plans [Abstract]	'
Retirement Plans	'
	Retirement Plans
	We have defined benefit pension plans and other postretirement plans for certain U.S. and Canadian employees. In addition, under several labor contracts, we make payments, based on hours worked, into multiemployer pension plan trusts established for the benefit of certain collective bargaining employees in facilities both inside and outside the U.S. We also have a Supplemental Executive Retirement Plan and other non-qualified defined benefit pension plans that provide unfunded supplemental retirement benefits to certain of our executives and former executives. The SERP provides for incremental pension benefits in excess of those offered in our principal pension plan.
	Salaried and nonunion hourly employees hired on or after January 1, 2005 are not eligible to participate in RockTenn benefit plans in effect prior to the Smurfit-Stone Acquisition. However, we provide an enhanced 401(k) plan match for such employees. The defined benefit pension plans acquired in connection with the Smurfit-Stone Acquisition cover substantially all hourly employees, as well as salaried employees hired prior to January 1, 2006. These plans were frozen for salaried employees at various stages prior to the acquisition. The postretirement plans provide certain health care and life insurance benefits for certain salaried and hourly employees who meet specified age and service requirements as defined by the plans.
	The benefits under our defined benefit pension plans are based on either compensation or a combination of years of service and negotiated benefit levels, depending upon the plan. We allocate our pension assets to several investment management firms across a variety of investment styles. Our defined benefit Investment Committee meets at least four times a year with our investment advisors to review each management firm’s performance and monitor their compliance with their stated goals, our investment policy and applicable regulatory requirements in the U.S. and Canada.
	We understand that investment returns are volatile. We believe that, by investing in a variety of asset classes and utilizing multiple investment management firms, we can create a portfolio that yields adequate returns with reduced volatility. After we consulted with our actuary and investment advisors, we adopted the target allocations in the table that follows for our pension plans to produce the desired performance. These target allocations are guidelines, not limitations, and occasionally plan fiduciaries will approve allocations above or below target ranges or modify the allocations.
	Target Allocations
		U.S. Plans						Canadian Plans
		2013			2012			2013			2012
	Equity investments	40	%		40	%		29	%		29	%
	Fixed income investments	45	%		45	%		58	%		58	%
	Short-term investments	1	%		2	%		1	%		1	%
	Other investments	14	%		13	%		12	%		12	%
	Our actual pension plans' asset allocations by asset category at September 30 were as follows:
		U.S. Plans						Canadian Plans
		2013			2012			2013			2012
	Equity investments	42	%		42	%		31	%		31	%
	Fixed income investments	44	%		45	%		57	%		58	%
	Short-term investments	4	%		3	%		2	%		2	%
	Other investments	10	%		10	%		10	%		9	%
	Total	100	%		100	%		100	%		100	%
	We manage our retirement plans in accordance with the provisions of ERISA and the regulations pertaining thereto as well as applicable legislation in Canada. Our investment policy objectives include maximizing long-term returns at acceptable risk levels, diversifying among asset classes, as applicable, and among investment managers as well as establishing certain risk parameters within asset classes. We have allocated our investments within the equity and fixed income asset classes to sub-asset classes designed to meet these objectives. In addition, our other alternative investments support multi-strategy objectives.
	In developing our weighted average expected rate of return on plan assets, we consulted with our investment advisor and evaluated criteria based on historical returns by asset class and long-term return expectations by asset class. We currently expect to contribute approximately $239 million to our defined benefit pension plans in fiscal 2014. However, it is possible that our assumptions or legislation may change, actual market performance may vary or we may decide to contribute a different amount. Therefore, the amount we contribute may vary materially. The expense for multiemployer plans for collective bargaining employees generally equals the contributions for these plans. We use a September 30 measurement date.
	The assumptions used to measure the benefit plan obligations at September 30 were:
		Pension Plans				Postretirement plans
		2013		2012		2013		2012
	Discount rate – U.S. Plans	5.19%		4.22%		5.19%		4.22%
	Rate of compensation increase – U.S. Plans	2.00 - 2.50%		2.00 - 2.50%		N/A		N/A
	Discount rate – Canadian Plans	4.56%		4.14%		4.56%		4.14%
	Rate of compensation increase – Canadian Plans	3.00 - 3.25%		3.00 - 3.25%		3.00%		3.00%
	Discount rate – SERP and Other Executive Plans	3.39 - 5.19%		2.57 - 4.22%		N/A		N/A
	Rate of compensation increase – SERP and Other Executive Plans	3.00%		6.00%		N/A		N/A
	We determine the discount rate with the assistance of actuaries. At September 30, 2013, the discount rate for the U.S. pension and postretirement plans was determined based on the yield on a theoretical portfolio of high-grade corporate bonds, and the discount rate for the Canadian pension, postretirement plans, SERP and the other executive plans was determined based on a yield curve developed by our actuary.
	The theoretical portfolio of high-grade corporate bonds used to select the September 30, 2013 discount rate for the U.S. pension plans includes bonds generally rated Aa- or better with at least $100 million outstanding par value and bonds that are non-callable (unless the bonds possess a “make whole” feature). The theoretical portfolio of bonds has cash flows that generally match our expected benefit payments in future years.
	Our assumption regarding the increase in compensation levels is reviewed periodically and the assumption is based on both our internal planning projections and recent history of actual compensation increases. We typically review our expected long-term rate of return on plan assets periodically through an asset allocation study with either our actuary or investment advisor. In fiscal 2014, our expected rate of return is 7.5% for our U.S. plans and 6.9% for our Canadian plans. Our 2014 rates of return are unchanged from fiscal 2013 and are based on an analysis of our long-term expected rate of return and our current asset allocation.
	Changes in benefit obligation for the years ended September 30 (in millions):
		Pension Plans								Postretirement Plans
		2013				2012				2013				2012
	Benefit obligation at beginning of year	$	4,973.50			$	4,363.50			$	166.2			$	167.5
	Service cost	35.1				30.1				1.6				1.5
	Interest cost	199.7				221.4				6.5				7.8
	Amendments	4.1				2.6				(9.3		)		(0.2		)
	Actuarial (gain) loss	(380.3		)		555.3				(17.9		)		(2.5		)
	Plan participant contributions	2.8				3				5.4				5.9
	Benefits paid	(260.4		)		(263.5		)		(17.3		)		(17.4		)
	Business combinations	—				(4.2		)		—				—
	Curtailments	(0.8		)		—				(2.7		)		—
	Settlements	(1.1		)		—				—				—
	Foreign currency rate changes	(48.4		)		65.3				(2.3		)		3.6
	Benefit obligation at end of year	$	4,524.20			$	4,973.50			$	130.2			$	166.2
	The accumulated benefit obligation of the pension plans was $4,487.4 million and $4,921.3 million at September 30, 2013 and 2012, respectively. At September 30, 2013 and 2012, no plan had a fair value of plan assets which exceeded its accumulated benefit obligation.
	Changes in plan assets for the years ended September 30 (in millions):
		Pension Plans								Postretirement Plans
		2013				2012				2013				2012
	Fair value of plan assets at beginning of year	$	3,480.20			$	2,919.40			$	—			$	—
	Actual gain on plan assets	152.6				400.6				—				—
	Employer contributions	188.9				367.5				11.9				11.5
	Plan participant contributions	2.8				3				5.4				5.9
	Benefits paid	(260.4		)		(263.5		)		(17.3		)		(17.4		)
	Settlements	(1.1		)		—				—				—
	Foreign currency rate changes	(40.3		)		53.2				—				—
	Fair value of assets at end of year	$	3,522.70			$	3,480.20			$	—			$	—
	Our fiscal 2012 contributions include approximately $12.8 million to fund benefit payments for one of our non-qualified plans.
	The table below sets forth the underfunded status recognized in the consolidated balance sheets at September 30 (in millions):
	Pension Plans								Postretirement Plans
	2013				2012				2013				2012
Other current liability	$	(26.3	)		$	(0.2	)		$	(11.9	)		$	(12.0	)
Accrued pension and other long-term benefits	(975.2		)		(1,493.1		)		(118.3		)		(154.2		)
Net amount recognized	$	(1,001.5	)		$	(1,493.3	)		$	(130.2	)		$	(166.2	)
The pre-tax amounts in accumulated other comprehensive loss at September 30 not yet recognized as components of net periodic pension cost consist of (in millions):
	Pension Plans								Postretirement Plans
	2013				2012				2013				2012
Net actuarial loss (gain)	$	551.2			$	877			$	(17.9	)		$	(0.1	)
Prior service cost (credit)	7.8				5				(10.9		)		(1.8		)
Total accumulated other comprehensive loss (income)	$	559			$	882			$	(28.8	)		$	(1.9	)
The pre-tax amounts recognized in other comprehensive (income) loss are as follows at September 30 (in millions):
	Pension Plans												Postretirement Plans
	2013				2012				2011				2013			2012			2011
Net actuarial (gain) loss arising during period	$	(286.6	)		$	377.6			$	334			$	(17.3	)	$	(2.5	)	$	2
Amortization of net actuarial loss	(39.3		)		(21.4		)		(18.9		)		—			—			—
Prior service cost (credit) arising during period	4.1				2.6				0.7				(9.3		)	(0.5		)	(1.0		)
Amortization of prior service (cost) credit	(1.2		)		(0.8		)		(0.7		)		(0.3		)	0.1			—
Net other comprehensive (income) loss recognized	$	(323.0	)		$	358			$	315.1			$	(26.9	)	$	(2.9	)	$	1
The net periodic pension cost recognized in the consolidated statements of income is comprised of the following for fiscal years ended (in millions):
	Pension Plans												Postretirement Plans
	2013				2012				2011				2013			2012			2011
Service cost	$	35.1			$	30.1			$	17.2			$	1.6		$	1.5		$	0.6
Interest cost	199.7				221.4				95.1				6.5			7.8			3.2
Expected return on plan assets	(247.3		)		(222.1		)		(91.9		)		—			—			—
Amortization of net actuarial loss	38.9				21.4				18.9				—			—			—
Amortization of prior service cost (credit)	1.2				0.8				0.7				0.3			(0.1		)	—
Curtailment gain	—				—				—				(2.7		)	—			—
Settlement loss	0.4				—				—				—			—			—
Company defined benefit plan expense	28				51.6				40				5.7			9.2			3.8
Multiemployer and other plans	20.3				9.8				4.6				—			—			—
Net pension cost	$	48.3			$	61.4			$	44.6			$	5.7		$	9.2		$	3.8
The assumed health care cost trend rates used in measuring the accumulated postretirement benefit obligation (“APBO”) are as follows at September 30:
		2013
U.S. Plans
Health care cost trend rate assumed for next year		9.13	%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)		5	%
Year the rate reaches the ultimate trend rate		2030
Canadian Plans
Health care cost trend rate assumed for next year		7.3	%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)		4.8	%
Year the rate reaches the ultimate trend rate		2029
The effect of a 1% change in the assumed health care cost trend rate would increase and decrease the APBO as of September 30, 2013 by approximately $7 million and would increase and decrease the annual net periodic postretirement benefit cost for 2013 by an immaterial amount.
Weighted-average assumptions used in the calculation of benefit plan expense for fiscal years ended:
	Pension Plans						Postretirement Plans
	2013		2012		2011		2013		2012		2011
Discount rate – U.S. Plans	4.22%		5.27%		5.50%		4.22%		5.27%		5.56	%
Rate of compensation increase – U.S Plans	2.00 - 2.50%		2.75 - 3.32%		3.11%		N/A		N/A		N/A
Expected long-term rate of return on plan assets – U.S. Plans	7.50%		8.00%		7.86%		N/A		N/A		N/A
Discount rate – Canadian Plans	4.14%		3.51 - 4.90%		5.13%		4.14%		4.90%		5.13	%
Rate of compensation increase – Canadian Plans	3.00 - 3.25%		3.00 - 3.25%		3.75%		3.00%		3.00%		3.75	%
Expected long-term rate of return on plan assets – Canadian Plans	6.88%		3.51 - 6.00%		6.00%		N/A		N/A		N/A
Discount rate – SERP and Other Executive Plans	2.57 - 4.22%		0.87 - 4.61%		0.24 - 5.09%		N/A		N/A		N/A
Rate of compensation increase SERP and Other Executive Plans	6.00%		6.00%		6.00%		N/A		N/A		N/A
The estimated losses that will be amortized from accumulated other comprehensive loss into net periodic benefit cost in fiscal 2014 are as follows (in millions):
	Pension Plans				Postretirement Plans
Actuarial loss (gain)	$	17.1			$	(0.7	)
Prior service cost (credit)	1.3				(1.4		)
	$	18.4			$	(2.1	)
Our projected estimated benefit payments (unaudited), which reflect expected future service, as appropriate, are as follows (in millions):
	Pension Plans				Postretirement Plans
Fiscal 2014	$	296.7			$	11.9
Fiscal 2015	275.1				11.6
Fiscal 2016	281.7				11
Fiscal 2017	286.1				10.4
Fiscal 2018	290.8				10.2
Fiscal Years 2019 – 2023	1,507.80				46.7
The following tables summarize our pension plan assets measured at fair value on a recurring basis (at least annually) as of September 30, 2013 and September 30, 2012 (in millions):
	September 30,				Quoted Prices				Significant				Significant
	2013				in Active				Other				Unobservable
					Markets for				Observable				Inputs (Level 3)
					Identical				Inputs (Level 2)
					Assets (Level 1)
Equity securities:
U.S. equities(a)	$	318			$	133.7			$	184.3			$	—
Non-U.S. equities(a)	810.4				58.1				752.3				—
Hedged equities(a)	267.2				—				267.2				—
Fixed income securities:
U.S. government securities(b)	127.8				—				127.8				—
Non-U.S. government securities(c)	94.2				—				94.2				—
US corporate bonds(c)	675.8				106.3				569.5				—
Non-US corporate bonds(c)	478.3				170.8				307.5				—
Mortgage-backed securities(c)	49.2				—				49.2				—
Other fixed income(d)	225.3				—				225.3				—
Short-term investments(e)	113.8				113.8				—				—
Other investments:
Alternative investments(f)	362.7				—				302.3				60.4
	$	3,522.70			$	582.7			$	2,879.60			$	60.4
	September 30, 2012				Quoted Prices				Significant				Significant
					in Active				Other				Unobservable
					Markets for				Observable				Inputs (Level 3)
					Identical				Inputs (Level 2)
					Assets (Level 1)
Equity securities:
U.S. equities(a)	$	275.5			$	107.1			$	168.4			$	—
Non-U.S. equities(a)	808.3				99.8				708.5				—
Hedged equities(a)	277.4				—				277.4				—
Fixed income securities:
U.S. government securities(b)	152.6				—				152.6				—
Non-U.S. government securities(c)	83.6				—				83.6				—
US corporate bonds(c)	667.7				98.3				569.4				—
Non-US corporate bonds(c)	489.8				188.8				301				—
Mortgage-backed securities(c)	46.5				—				46.5				—
Other fixed income(d)	233				—				233				—
Short-term investments(e)	114.4				114.4				—				—
Other investments:
Alternative investments(f)	331.4				—				268.1				63.3
	$	3,480.20			$	608.4			$	2,808.50			$	63.3
(a)	Equity securities are comprised of the following investment types: (i) common stock; (ii) preferred stock; (iii) equity exchange traded funds; (iv) hedged equity investments and (v) commingled equity funds. Investments in common and preferred stocks and exchange traded funds are valued using quoted market prices multiplied by the number of shares owned. The hedged equity investment is a commingled fund that consists primarily of equity indexed investments which are hedged by options and also holds collateral in the form of short term treasury securities. The commingled fund investments are valued at the net asset value per share multiplied by the number of shares held. The determination of net asset value for the commingled funds includes market pricing of the underlying assets as well as broker quotes and other valuation techniques.
(b)	U.S. government securities include treasury and agency debt. These investments are valued using broker quotes in an active market.
(c)	These investments are valued utilizing a market approach that includes various valuation techniques and sources such as value generation models, broker quotes in active and non-active markets, benchmark yields and securities, reported trades, issuer spreads, and/or other applicable reference data. The U.S. corporate bonds category is primarily comprised of U.S. dollar denominated investment grade securities. Commingled debt funds are valued at their net asset value per share multiplied by the number of shares held. The determination of net asset value for the commingled funds includes market pricing of the underlying assets as well as broker quotes and other valuation techniques.
(d)	Other fixed income is comprised of municipal and asset-backed securities. Investments are valued utilizing a market approach that includes various valuation techniques and sources such as, broker quotes in active and non-active markets, benchmark yields and securities, reported trades, issuer spreads and/or other applicable reference data.
(e)	Short-term investments are valued at $1.00/unit, which approximates fair value. Amounts are generally invested in interest-bearing accounts.
(f)	The alternative investments are diversified across multiple asset managers and several types of asset classes including hedge funds, private equity partnerships and real estate funds. The hedge funds are valued at net asset value. Fair value of the private equity partnerships is determined based on discounted cash flow analysis that utilizes unobservable inputs such as weighted average cost of capital ranging from 8.8% to 16.1% for 2013 and 7.3% to 20.0% for 2012; residual growth rate assumptions ranging from 1.0% to 4.0% for 2013 and 1.5% to 4.0% for 2012; revenue growth rates ranging from 2.2% to 6.6% for 2013 and 1.6% to 9.1% for 2012; and EBITDA of market comparable companies with multiples ranging from 7.0 to 13.2 for 2013 and 4.8 to 14.5 for 2012. The fair value of our real estate funds is based on the utilization of various unobservable inputs including but not limited to rental rate factors ranging from 0% to 25% for 2013 and 2012; capitalization rates ranging from 5% to 8% for 2013 and 2012; discount rates ranging from 7% to 9% for 2013 and 2012; and inflation rates ranging from 0% to 5% for 2013 and 2012.
The following table summarizes the changes in our Level 3 pension plan assets for the years ended September 30, 2013 and 2012 (in millions):
	Non-US				Alternative				Total
	Corporate				Investments
	Bonds
Balance as of September 30, 2011	$	1.4			$	181.9			$	183.3
Purchases, sales, issuances, and settlements, net	(1.3		)		(1.6		)		(2.9		)
Actual return on plan assets:
Relating to instruments still held at end of year	—				9.7				9.7
Relating to instruments sold during the year	(0.1		)		2.8				2.7
Transfers out of level 3	—				(129.5		)		(129.5		)
Balance as of September 30, 2012	$	—			$	63.3			$	63.3
Purchases, sales, issuances, and settlements, net	—				(9.0		)		(9.0		)
Actual return on plan assets:
Relating to instruments still held at end of year	—				2.5				2.5
Relating to instruments sold during the year	—				3.6				3.6
Balance as of September 30, 2013	$	—			$	60.4			$	60.4
Various alternative investments are subject to initial one-year lock-up restrictions with monthly or quarterly redemption requirements that include a specified notice period in order to liquidate. As such, these alternative investments were categorized as Level 3 assets in fiscal 2011. In fiscal 2012, these lock-up restrictions expired and the alternative investments were transferred to Level 2.
Multiemployer Plans
We participate in several multiemployer pension plans administered by labor unions that provide retirement benefits to certain union employees in accordance with various collective bargaining agreements. Approximately 46% of our employees are covered by CBAs, of which approximately 17% are covered by CBAs that have expired and another 30% are covered by CBAs that expire within one year. As one of many participating employers in these MEPPs, we are generally responsible with the other participating employers for any plan underfunding. Our contributions to a particular MEPP are established by the applicable CBAs; however, our required contributions may increase based on the funded status of an MEPP and legal requirements such as those of the Pension Protection Act of 2006, which requires substantially underfunded MEPPs to implement a funding improvement plan (“FIP”) or a rehabilitation plan (“RP”) to improve their funded status. Factors that could impact funded status of an MEPP include, without limitation, investment performance, changes in the participant demographics, decline in the number of contributing employers, changes in actuarial assumptions and the utilization of extended amortization provisions.
A FIP or RP requires a particular MEPP to adopt measures to correct its underfunded status. These measures may include, but are not limited to: an increase in our contribution rate to the applicable CBA, a reallocation of the contributions already being made by participating employers for various benefits to individuals participating in the MEPP, and/or a reduction in the benefits to be paid to future and/or current retirees. In addition, the Pension Act requires that a 5% surcharge be levied on employer contributions for the first year commencing shortly after the date the employer receives notice that the MEPP is in critical status (also referred to as red status) and a 10% surcharge on each succeeding year until a CBA is in place with terms and conditions consistent with the RP.
We could also be obligated to make future payments to MEPPs if we either cease to have an obligation to contribute to the MEPP or significantly reduce our contributions to the MEPP because we reduce our number of employees who are covered by the relevant MEPP for various reasons, including, but not limited to, layoffs or closures, assuming the MEPP has unfunded vested benefits. The amount of such payments (known as a complete or partial withdrawal liability) generally would equal our proportionate share of the MEPPs' unfunded vested benefits. We believe that certain of the MEPP's in which we participate have material unfunded vested benefits. Primarily as a result of the Smurfit-Stone Acquisition, our share of the contributions in one of these plans exceeded 5% of total plan contributions for certain plan years. Due to uncertainty regarding future factors that could trigger a withdrawal liability, as well as the absence of specific information regarding matters such as the MEPP's current financial situation due in part to delays in reporting, the potential withdrawal or bankruptcy of other contributing employers, the impact of future plan performance or the success of current and future funding improvement or rehabilitation plans to restore solvency to the plans, we are unable to determine with certainty the amount and timing of any future withdrawal liability, changes in future funding obligations, or the impact of increased contributions, including those that could be triggered by a mass withdrawal of other employers from a MEPP. There can be no assurance that the impact of increased contributions, future funding obligations or future withdrawal liabilities will not be material to our results of operations, financial condition or cash flows. At September 30, 2013 and September 30, 2012, we had a withdrawal liability recorded of $17.1 million and $3.9 million, respectively.
The following table lists our participation in our multiemployer and other plans that are individually significant for the years ended September 30 (in millions):
Pension Fund	EIN / Pension Plan Number		Pension Protection Act Zone Status				FIP / RP Status Pending / Implemented		Contributions (a)										Surcharge imposed?		Expiration CBA
			2013		2012				2013				2012			2011
U.S. Multiemployer plans:
Pace Industry Union-Management Pension Fund	11-6166763 / 001		Red		Red		Implemented		$	3.9			$	3.6		$	1.8		Yes		9/30/11 to 8/2/2017
Other Funds									3.2				6.2			2.8
Total Contributions:									$	7.1			$	9.8		$	4.6
(a)	Contributions represent the amounts contributed to the plan during the fiscal year. Our contributions for fiscal 2012 and 2011 exceeded 5% of total plan contributions. Although the plan data for fiscal 2013 is not yet available, we would expect to continue to exceed 5% of total plan contributions. Contributions for fiscal 2013 exclude $13.2 million accrued related to a partial plan withdrawal.
Defined Contribution Plans
We have 401(k) and other defined contribution plans that cover our U.S. and Canadian salaried and nonunion hourly employees as well as certain employees covered by union collective bargaining agreements, subject to an initial waiting period. The 401(k) plans permit participants to make contributions by salary reduction pursuant to Section 401(k) of the Code. Due primarily to acquisitions, we have plans with varied terms, at September 30, 2013 the company contributions are generally up to 3% to 4%. During fiscal 2013, 2012 and 2011, we recorded expense of $29.9 million, $31.8 million and $20.3 million, respectively, related to the 401(k) plans and defined contribution plans.
Supplemental Retirement Plans
We have supplemental retirement savings plans (the “Supplemental Plans”) that are nonqualified deferred compensation plans. We intend to provide participants with an opportunity to supplement their retirement income through deferral of current compensation. These plans are divided into a broad based section and the senior executive section. The broad based section was put into effect on January 1, 2006 for certain highly compensated employees whose 401(k) contributions were capped at a maximum deferral rate in certain 401(k) plans in an effort to pass the nondiscrimination tests in those plans. Participants in the broad based section of the plan can contribute base pay up to a certain maximum dollar amount determined annually. In addition, amounts are contributed for certain executives whose participation in our pension plans is limited or excluded. Contributions in the broad based section of the plan are not matched. Amounts deferred and payable under the Supplemental Plans are our unsecured obligations (the “Obligations”) and rank equally with our other unsecured and unsubordinated indebtedness outstanding. Each participant in the senior executive portion of the plan elects the amount of eligible base salary and/or eligible bonus to be deferred to a maximum deferral of 6% of base salary and eligible bonus. We match $0.50 on the dollar of the amount contributed by participants in the senior executive section. Each Obligation will be payable on a date selected by us pursuant to the terms of the Supplemental Plans. Generally, we are obligated to pay the Obligations after termination of the participant’s employment or in certain emergency situations. We will adjust each participant’s account for investment gains and losses under the Supplemental Plans in accordance with the participant’s investment election or elections (or default election or elections) as in effect from time to time. We will make all such adjustments at the same time and in accordance with the same procedures followed under our 401(k) plans for crediting investment gains and losses to a participant’s account under our 401(k) plans. The Obligations are denominated and payable in U.S. dollars. The amount recorded for both the asset and liability was approximately $13.3 million at September 30, 2013. The investment alternatives available under the Supplemental Plans are generally similar to investment alternatives you would find available under 401(k) plans. The recorded expense for the current fiscal year and the preceding two fiscal years was not significant.

Shareholders_Equity

Shareholders' Equity	12 Months Ended
	Sep. 30, 2013
Shareholders’ Equity [Abstract]	'
Shareholders' Equity	'
	Shareholders’ Equity
	Capitalization
	Our capital stock consists solely of our Class A common stock, par value $0.01 per share. Holders of our Common Stock are entitled to one vote per share. Our articles of incorporation also authorize preferred stock, of which no shares have been issued. The terms and provisions of such shares will be determined by our board of directors upon any issuance of such shares in accordance with our articles of incorporation.
	Stock Repurchase Plan
	Our board of directors has approved a stock repurchase plan that allows for the repurchase of shares of Common Stock over an indefinite period of time. Our stock repurchase plan, as amended in November 2013, allows for the repurchase of a total of 9.2 million shares of Common Stock, an increase from the 6.0 million previously authorized. Pursuant to our repurchase plan, in fiscal 2013, 2012 and 2011, we did not repurchase any shares of Common Stock. As of September 30, 2013, we had approximately 1.8 million shares of Common Stock available for repurchase, and 5.0 million shares after the November 2013 amendment.

ShareBased_Compensation

Share-Based Compensation	12 Months Ended
	Sep. 30, 2013
Stock Based Compensation [Abstract]	'
Stock Based Compensation	'
	Share-Based Compensation
	Stock-based Compensation Plan
	We issue nonqualified stock options and restricted stock to certain key employees and our directors pursuant to our 2004 Incentive Stock Plan. We also have options and restricted stock outstanding under our preexisting 2000 Incentive Stock Plan. We also maintain an employee stock purchase plan that provides for the purchase of shares by all of our eligible employees at a 15% discount.
	Our 2004 Incentive Stock Plan allows for the granting of options and restricted stock, stock appreciation rights and restricted stock units to certain key employees and directors for the issuance of approximately 7.9 million shares of Common Stock. As of September 30, 2013, approximately 2.8 million shares were available for the future grant of awards. If all adjustable restricted stock awards achieve the maximum adjustment of target, approximately 0.8 million additional shares would be issued and reduce the number of shares available for future grant by the same amount.
	In connection with the Smurfit-Stone Acquisition, we assumed the Smurfit-Stone equity incentive plan, which was renamed the Rock-Tenn Company (SSCC) Equity Incentive Plan. The shares available for issuance, and stock options and unvested restricted stock units outstanding at the time of the Smurfit-Stone Acquisition, under the Smurfit-Stone plan were converted into shares of our Common Stock and options and restricted stock units, as applicable, with respect to shares of our Common Stock using the conversion factor as described in the merger agreement. The number of shares available under this plan upon conversion was approximately 4.0 million shares. As of September 30, 2013, approximately 2.6 million shares were available for future grants exclusively to legacy Smurfit-Stone employees who continued employment with RockTenn; however, we have determined that we will not make any more grants of awards pursuant to the Rock-Tenn Company (SSCC) Equity Incentive Plan. If all adjustable share restricted stock awards pursuant to the Rock-Tenn Company (SSCC) Equity Incentive Plan achieve the maximum adjustment of target, less than approximately 0.1 million additional shares would be issued and reduce the number of shares available for future grant by the same amount.
	Our results of operations for the fiscal years ended September 30, 2013, 2012 and 2011 include share-based compensation expense of $46.5 million, $29.2 million and $21.4 million, respectively. The total income tax benefit in the results of operations in connection with share-based compensation was $17.4 million, $11.1 million and $8.2 million, for the fiscal years ended September 30, 2013, 2012 and 2011, respectively.
	ASC 718 requires that the benefits of tax deductions in excess of recognized compensation cost are reported as a financing cash flow. Excess tax benefits of approximately $6.0 million and $10.0 million were included in cash used for financing activities in fiscal 2013 and 2012, respectively. There were no excess tax benefits recognized in fiscal 2011 as we were in a net operating loss carryforward position. Cash received from share-based payment arrangements for the fiscal years ended September 30, 2013, 2012 and 2011 was $13.4 million, $17.3 million and $34.9 million, respectively.
	Stock Options
	Options granted under our plans have an exercise price equal to the closing market price on the date of the grant, generally vest in 3 years and have 10-year contractual terms. However, a portion of our grants are subject to earlier expense recognition due to retirement eligibility rules. Our option grants provide for accelerated vesting if there is a change in control (as defined in the applicable plan). However, the Compensation Committee of the board of directors has determined that effective with the fiscal 2013 grants, other than circumstances such as death and disability, the grants will include a provision requiring both a change of control and termination of employment to accelerate vesting.
	At the date of grant, we estimate the fair value of options granted using a Black-Scholes option pricing model. We use historical data to estimate option exercises and employee terminations in determining the expected term in years for stock options. Expected volatility is calculated based on the historical volatility of our stock. The risk-free interest rate is based on U.S. Treasury securities in effect at the date of the grant of the stock options. The dividend yield is estimated based on our historic annual dividend payments and current expectations for the future.
	We applied the following weighted average assumptions to estimate the fair value of stock option grants made in the following periods:
		2013		2012			2011
	Expected term in years	5.8		5.3			5.2
	Expected volatility	44	%	47.3	%		46.5	%
	Risk-free interest rate	1	%	0.8	%		2.1	%
	Dividend yield	1.4	%	1.4	%		1.4	%
	As part of the Smurfit-Stone Acquisition, outstanding options to purchase Smurfit-Stone common stock under the Smurfit-Stone equity incentive plan were assumed by RockTenn and converted into a vested option to purchase RockTenn Common Stock in fiscal 2011 based on an equity award exchange ratio. Accordingly, we issued 1,314,251 vested options that were valued at $42.89 per share using the Black-Scholes option pricing model which resulted in the inclusion of $56.4 million in the Smurfit-Stone Acquisition purchase price. The significant assumptions used were: an expected term of 3.5 years; an expected volatility of 48.8%; expected dividends of 1.4%; and a risk-free rate of 1.1%.
	The table below summarizes the changes in all stock options during the year ended September 30, 2013:
		Shares		Weighted				Weighted		Aggregate
				Average				Average		Intrinsic
				Exercise				Remaining		Value
				Price				Contractual		(in millions)
								Term
								(in years)
	Outstanding at September 30, 2012	1,341,969		$	41.73
	Granted	197,860		79.81
	Exercised	(312,293	)	31.83
	Expired	(3,200	)	34.5
	Forfeited	(40,585	)	66.29
	Outstanding at September 30, 2013	1,183,751		$	49.88			6.4		$	60.8
	Exercisable at September 30, 2013	698,916		$	35.31			4.9		$	46.1
	Vested and expected to vest at September 30, 2013	1,164,815		$	49.51			6.4		$	60.3
	The weighted average grant date fair value for options granted during the fiscal years ended September 30, 2013, 2012 and 2011 was $29.09, $23.81 and $41.09 per share, respectively. The increase in the grant date fair value in fiscal 2011 was due to the replacement shares issued in connection with the Smurfit-Stone Acquisition discussed above. The aggregate intrinsic value of options exercised during the years ended September 30, 2013, 2012 and 2011 was $16.1 million, $13.5 million and $31.7 million, respectively.
	As of September 30, 2013, there was $5.0 million of total unrecognized compensation cost related to nonvested stock options; that cost is expected to be recognized over a weighted average remaining vesting period of 1.4 years. Where applicable, we amortize these costs using the accelerated attribution method.
	Restricted Stock
	Restricted stock is typically granted annually to certain of our employees and non-employee directors. Our non-employee director awards have a service condition. The vesting provisions for our employees may vary from grant to grant, however, vesting generally is contingent upon meeting various service and/or performance or market goals including, but not limited to, achievement of various financial targets including Cash Flow to Equity Ratio, percentage return on common stock, annual average return over capital costs compared to our Peer Group, or achievement of certain stock price targets (each as defined in the award documents). Subject to the level of performance attained, the target award of some of the grants may be increased up to 200% of target or decreased to zero depending upon the terms of the individual grant. The grants generally vest over a period of 3 years depending on the nature of the vesting provisions, except for non-employee director grants, which vest over one year. Our grants provide for accelerated vesting if there is a change in control (as defined in the applicable plan). However, the Compensation Committee of the board of directors has determined that effective with the fiscal 2013 grants, other than circumstances such as death and disability, the grants will include a provision requiring both a change of control and termination of employment to accelerate vesting.
	Our grants to our non-employee directors are treated as issued and carry dividend and voting rights until they vest. At September 30, 2013 and September 30, 2012, shares of restricted stock of less than 0.1 million and 0.1 million, respectively, are reflected in our accompanying balance sheets as issued that have not yet met the service condition to vest.
	The table below summarizes the changes in unvested restricted stock awards during the year ended September 30, 2013:
		Shares		Weighted
				Average
				Grant Date Fair
				Value
	Unvested at September 30, 2012	862,675		$	58.66
	Granted	461,338		71.6
	Vested	(379,843	)	43.69
	Forfeited	(66,610	)	66.42
	Unvested at September 30, 2013(1)	877,560		$	71.35
	-1	Target awards, net of subsequent forfeitures, granted in fiscal 2013, 2012 and 2011 of 302,360, 323,275 and 225,000 shares, respectively, may be increased to 200% of the target or decreased to zero, subject to the level of performance attained. The awards are reflected in the table at the target award amount of 100%. Based on current facts and assumptions we are forecasting the performance of the fiscal 2013, fiscal 2012 and fiscal 2011 grants to be attained at approximately 200%, 200% and 100% of target, respectively. However, it is possible that the performance attained may vary.
	There was approximately $43.9 million of unrecognized compensation cost related to all unvested restricted shares as of September 30, 2013 that will be recognized over a weighted average remaining vesting period of 1.5 years.
	The following table represents a summary of restricted stock vested in fiscal 2013, 2012 and 2011 (in millions, except shares):
		2013			2012				2011
	Shares of restricted stock vested	379,843			495,368				420,596
	Aggregate fair value of restricted stock vested	$	26.6		$	33.6			$	28
	The following table represents a summary of restricted stock shares granted in fiscal 2013, 2012 and 2011 with terms defined in the applicable grant letters. The shares are not deemed to be issued and carry dividend and voting rights until the relevant conditions defined in the award documents have been met, unless otherwise noted.
		2013		2012			2011
	Shares of restricted stock granted to non-employee directors(1)	11,925		20,700			20,155
	Shares of restricted stock granted to employees:
	Shares granted for attainment of a performance condition at an amount in excess of target(2)	120,293		—			173,028
	Shares granted with a service condition and a Cash Flow to Equity Ratio performance condition at target(3)	314,120		389,550			262,775
	Shares granted with a service condition(4)	15,000		—			—
	Total restricted stock granted	461,338		410,250			455,958
	-1	Non-employee director grants vest over one year and are deemed issued on the grant date and have voting and dividend rights. Also includes converted restricted stock units held by the Smurfit-Stone directors who served on the RockTenn board of directors in fiscal 2011.
	-2	Shares issued in fiscal 2013 for the fiscal 2010 Cash Flow to Equity Ratio were at 150% of target. Shares issued in fiscal 2011 for the fiscal 2009 Cash Flow to Equity Ratio, the fiscal 2008 Annual Average Return over Capital Costs and the fiscal 2008 Total Shareholder Return were each at 150% of target.
-3	These employee grants vest over approximately three years and have adjustable ranges from 0-200% of target subject to the level of performance attained in the respective award agreement.
-4	These shares vest over four years.
Expense is recognized on grants with a performance condition and service condition on a straight-line basis over the explicit service period when we estimate that it is probable the performance conditions will be satisfied. Expense recognized on grants with a performance condition that affects how many shares are ultimately awarded is based on the number of shares expected to be awarded. Expense is recognized on grants with a market condition and service condition on a straight-line basis over the requisite service period, which is based on the explicit service period.
Employee Stock Purchase Plan
Under the 1993 Employee Stock Purchase Plan, as amended and restated (the “Plan”), shares of Common Stock are reserved for purchase by substantially all of our qualifying employees. The Plan allows for the purchase of a total of approximately 4.3 million shares of Common Stock. During fiscal 2013, 2012 and 2011, employees purchased approximately 0.1 million, 0.1 million and 0.1 million shares, respectively, under the Plan. We recognized $0.7 million, $0.6 million and $0.5 million of expense for fiscal 2013, 2012 and 2011, respectively, related to the 15% discount on the purchase price allowed to employees. As of September 30, 2013, approximately 0.7 million shares of Common Stock remained available for purchase under the Plan.

Related_Party_Transactions

Related Party Transactions	12 Months Ended
	Sep. 30, 2013
Related Party Transactions [Abstract]	'
Related Party Transactions	'
	Related Party Transactions
	We sell products to affiliated companies. Net sales to the affiliated companies for the fiscal years ended September 30, 2013, 2012 and 2011 were approximately $308.7 million, $353.3 million and $156.6 million, respectively. Accounts receivable due from the affiliated companies at September 30, 2013 and 2012 was $59.9 million and $38.5 million, respectively, and was included in accounts receivable on our consolidated balance sheets.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Sep. 30, 2013
Commitments and Contingencies [Abstract]	'
Commitments and Contingencies	'
	Commitments and Contingencies
	Capital Additions
	Estimated costs for future purchases of fixed assets that we are obligated to purchase as of September 30, 2013, total approximately $98.7 million.
	Environmental and Other Matters
	Environmental compliance requirements are a significant factor affecting our business. We employ processes in the manufacture of pulp, paperboard and other products which result in various discharges, emissions and wastes. These processes are subject to numerous federal, state, local and foreign environmental laws and regulations. We operate and expect to continue to operate, under environmental permits and similar authorizations from various governmental authorities that regulate such discharges, emissions and wastes. Environmental programs in the U.S. are primarily established, administered and enforced at the federal level by the United States Environmental Protection Agency. In addition, many of the jurisdictions in which we operate have adopted equivalent or more stringent environmental laws and regulations or have enacted their own parallel environmental programs.
	In 2004, the EPA promulgated a Maximum Achievable Control Technology regulation that established air emissions standards and other requirements for industrial, commercial and institutional boilers. The rule was challenged by third parties in litigation, and in 2007, the United States Court of Appeals for the D. C. Circuit issued a decision vacating and remanding the rule to the EPA. Under court order, the EPA published a set of four interrelated rules in March 2011, commonly referred to as Boiler MACT. The EPA also published notice in March 2011 that it would reconsider certain aspects of Boiler MACT in order to address “difficult technical issues” raised during the public comment period. On December 20, 2012, the EPA took final action on its proposed reconsideration of certain provisions of the March 2011 Boiler MACT rules. The Boiler MACT reconsideration rules included certain adjustments based on the EPA’s review of existing and new data provided after the March 2011 standards were issued. For the Company’s boilers where capital may be necessary for compliance, the final December 2012 rule requires compliance by January 31, 2016, subject to a possible one-year extension. Several environmental, industry and other groups have filed legal challenges to the December 2012 final Boiler MACT rules. We cannot predict with certainty how any of the legal challenges will impact our Boiler MACT strategies and costs.
	Certain jurisdictions in which the Company has manufacturing facilities or other investments have taken actions to address climate change. In the U.S., the EPA has issued the Clean Air Act permitting regulations applicable to facilities that emit greenhouse gases. These regulations became effective for certain GHG sources on January 2, 2011, with implementation for other sources to be phased in over the next several years. The EPA also has promulgated a rule requiring facilities that emit 25,000 metric tons or more of carbon dioxide equivalent per year to file an annual report of their emissions. Some U.S. states and Canadian provinces in which RockTenn has manufacturing operations are also taking measures to reduce GHG emissions. For example, Quebec, has become a member of the Western Climate Initiative, which is a collaboration of U.S. states, Canadian provinces, Mexican states and tribes that have joined together to create a cap-and-trade program to reduce GHG emissions. On November 18, 2009, Quebec adopted a target of reducing GHG emissions by 20% below 1990 levels by 2020. In December 2011, Quebec issued a final regulation establishing a cap-and-trade program that required reductions in GHG emissions from covered emitters as of January 1, 2013. Enactment of the Quebec cap-and-trade program may require capital expenditures to modify certain assets at our containerboard mill in Quebec to meet required GHG emission reduction requirements in future years. Such requirements also may increase energy costs above the level of general inflation and result in direct compliance and other costs. However, we do not believe that compliance with the requirements of the new cap-and-trade program will have a material adverse effect on our operations or financial condition. We have systems in place for tracking the GHG emissions from our energy-intensive facilities, and we carefully monitor developments in climate change laws, regulations and policies to assess the potential impact of such developments on our operations and financial condition.
	In addition to Boiler MACT and greenhouse gas standards, the EPA has finalized a number of other environmental rules that may impact the pulp and paper industry, including National Ambient Air Quality Standards for nitrogen oxide, sulfur dioxide and fine particulate matter. The EPA is also revising existing environmental standards and developing several new rules that may apply to the industry in the future. We cannot currently predict with certainty how any future changes in environmental laws, regulations and/or enforcement practices will affect our business; however, it is possible that our compliance with new environmental standards may require substantial capital expenditures or operating costs could increase materially.
	On October 1, 2010, our Hopewell, Virginia containerboard mill received a Finding of Violation and Notice of Violation from EPA Region III alleging certain violations of regulations that require treatment of kraft pulping condensates. We strongly disagree with the assertion of the violations in the NOV and are currently engaged in settlement negotiations regarding the matters alleged in the NOV. We believe that any potential fine relating to those matters will not have a significant adverse effect on our results of operations, financial condition or cash flows. We also are involved in various other administrative proceedings relating to environmental matters that arise in the normal course of business. Although the ultimate outcome of such matters cannot be predicted with certainty and we cannot at this time estimate any reasonably possible losses, management does not believe that the currently expected outcome of any environmental proceeding or claim that is pending or threatened against us will have a material adverse effect on our results of operations, financial condition or cash flows.
	We also face potential liability under the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 and analogous state laws as a result of releases, or threatened releases, of hazardous substances into the environment from various sites owned and operated by third parties at which Company-generated wastes have allegedly been deposited. Generators of hazardous substances sent to off-site disposal locations at which environmental problems exist, as well as the owners of those sites and certain other classes of persons, all of whom are referred to as potentially responsible parties are, in most instances, subject to joint and several liability for response costs for the investigation and remediation of such sites under CERCLA and analogous state laws, regardless of fault or the lawfulness of the original disposal. Liability is typically shared with other PRPs and costs are commonly allocated according to relative amounts of waste deposited and other factors.
	On January 26, 2009, Smurfit-Stone and certain of its subsidiaries filed a voluntary petition for relief under Chapter 11 of the United States Bankruptcy Code. Smurfit-Stone’s Canadian subsidiaries also filed to reorganize in Canada. We believe that matters relating to previously identified third party PRP sites and certain formerly owned facilities of Smurfit-Stone have been or will be satisfied claims in the Smurfit-Stone bankruptcy proceedings. However, we may face additional liability for cleanup activity at sites that existed prior to bankruptcy discharge, but are not currently identified. Some of these liabilities may be satisfied from existing bankruptcy reserves. We may also face liability under CERCLA and analogous state and other laws at other ongoing and future remediation sites where we may be a PRP. In addition to the above mentioned sites, certain of our current or former locations are being studied or remediated under various environmental laws and regulations. Based on current facts and assumptions, we do not believe that the costs of these projects will have a material adverse effect on our results of operations, financial condition or cash flows.
	We believe that we can assert claims for indemnification pursuant to existing rights we have under settlement and purchase agreements in connection with certain of our existing remediation sites. However, there can be no assurance that we will be successful with respect to any claim regarding these indemnification rights or that, if we are successful, any amounts paid pursuant to the indemnification rights will be sufficient to cover all our costs and expenses. We also cannot predict with certainty whether we will be required to perform remediation projects at other locations, and it is possible that our remediation requirements and costs could increase materially in the future. In addition, we cannot currently assess with certainty the impact that future federal, state or other environmental laws, regulations or enforcement practices will have on our results of operations, financial condition or cash flows.
	Our operations are subject to federal, state, local and foreign laws and regulations relating to workplace safety and worker health including the Occupational Safety and Health Act and related regulations. OSHA, among other things, establishes asbestos and noise standards and regulates the use of hazardous chemicals in the workplace. Although we do not use asbestos in manufacturing our products, some of our facilities contain asbestos. For those facilities where asbestos is present, we believe we have properly contained the asbestos and/or we have conducted training of our employees in an effort to ensure that no federal, state or local rules or regulations are violated in the maintenance of our facilities. We do not believe that future compliance with health and safety laws and regulations will have a material adverse effect on our results of operations, financial condition or cash flows.
	As of September 30, 2013, we had approximately $4.3 million reserved for environmental liabilities on an undiscounted basis, of which $3.1 million is included in other long-term liabilities and $1.2 million in other current liabilities. We believe the liability for these matters was adequately reserved at September 30, 2013.
	Other Litigation
	In late 2010, Smurfit-Stone was one of nine U.S. and Canadian containerboard producers named as defendants in a lawsuit, in the United States District Court of the Northern District of Illinois, alleging that these producers violated the Sherman Act by conspiring to limit the supply and fix the prices of containerboard from mid-2005 through November 8, 2010. RockTenn CP, LLC, as the successor to Smurfit-Stone, is a defendant with respect to the period after Smurfit-Stone’s discharge from bankruptcy in June 30, 2010 through November 8, 2010. The complaint seeks treble damages and costs, including attorney’s fees. The defendants’ motions to dismiss the complaint were denied by the court in April 2011. We believe the allegations are without merit and will defend this lawsuit vigorously. However, as the lawsuit is still in the early stages of discovery, we are unable to predict the ultimate outcome or estimate a range of reasonably possible losses.
	We are a defendant in a number of other lawsuits and claims arising out of the conduct of our business. While the ultimate results of such suits or other proceedings against us cannot be predicted with certainty, management believes the resolution of these other matters will not have a material adverse effect on our consolidated financial condition, results of operations or cash flows.
	Guarantees
	We have made the following guarantees as of September 30, 2013:
	•	we have a 49% ownership interest in Seven Hills Paperboard, LLC. The joint venture partners guarantee funding of net losses in proportion to their share of ownership;
	•	we have a wood chip processing contract with minimum purchase commitments which expire in 2017. As part of the agreement, we guarantee the third party contractors' debt outstanding and have a security interest in the chipping equipment. At September 30, 2013, the maximum potential amount of future payments related to these guarantees was approximately $7 million, which decreases ratably over the life of the contracts. In the event the guarantees on these contracts were called, proceeds from the liquidation of the chipping equipment would be based on current market conditions and we may not recover in full the guarantee payments made;
	•	as part of acquisitions we have acquired unconsolidated entities for which we guarantee approximately $5 million in debt, primarily for bank loans; and
	•	we lease certain manufacturing and warehousing facilities and equipment under various operating leases. A substantial number of these leases require us to indemnify the lessor in the event that additional taxes are assessed due to a change in the tax law. We are unable to estimate our maximum exposure under these leases because it is dependent on changes in the tax law.
	Seven Hills Option
	Seven Hills commenced operations on March 29, 2001. Our partner in the Seven Hills joint venture has the option to require us to purchase its interest in Seven Hills, at a formula price, effective on the sixth or any subsequent anniversary of the commencement date by providing us notice two years prior to any such anniversary. The earliest date on which we could be required to purchase our partner’s interest is March 29, 2016. We have not recorded any liability for this unexercised option. We currently project this contingent obligation to purchase our partner’s interest (based on the formula) to be approximately $11 million at September 30, 2013, which would result in a purchase price of approximately 54% of our partner’s net equity reflected on Seven Hills’ September 30, 2013 balance sheet.

Segment_Information

Segment Information	12 Months Ended
	Sep. 30, 2013
Segment Information [Abstract]	'
Segment Information	'
	Segment Information
	In the first quarter of fiscal 2014, we announced a realignment of our operating responsibilities and a related change to our segments for financial reporting purposes. Following the realignment we will be reporting our results of operations in the following four reportable segments: Corrugated Packaging, consisting of our containerboard mills and our corrugated converting operations; Consumer Packaging, consisting of our coated and uncoated paperboard mills and consumer packaging converting operations; Merchandising Displays, consisting of our display and contract packaging services; and Recycling, which consists of our recycled fiber brokerage and collection operations. The change primarily reflects: the creation of a Merchandising Displays segment which has been removed from the Consumer Packaging segment; the realignment of one facility from our Corrugated Packaging segment to our Merchandising Displays segment; and, we have changed the way we report net sales from our Recycling facilities to our mills. The impact of the Recycling segment net sales change is to treat the recovered paper procured for our mills as a transfer with an administrative fee which is reflected in segment sales instead of the previously reported sale transaction between the segments. We have reclassified our results for all periods presented to reflect these changes.
	Some of our operations included in the segments are located in Canada, Mexico, Chile, Argentina, Puerto Rico and China. The table below reflects financial data of our foreign operations for each of the past three fiscal years (in millions, except percentages):
		Years Ended September 30,
		2013			2012			2011
	Foreign net sales to unaffiliated customers	$	1,272.50		$	1,238.60		$	639
	Foreign segment income	$	95.9		$	48.7		$	62.1
	Foreign long-lived assets	$	444.6		$	496.7		$	513.1
	Foreign operations as a percent of consolidated operations:
	Foreign net sales to unaffiliated customers	13.3		%	13.5		%	11.8		%
	Foreign segment income	9.7		%	6.8		%	11.7		%
	Foreign long-lived assets	8		%	8.9		%	9.3		%
	The foreign net sales to unaffiliated customers, segment income and long-lived assets are primarily associated with operations in Canada.
	We evaluate performance and allocate resources based, in part, on profit from operations before income taxes, interest and other items. The accounting policies of the reportable segments are the same as those described above in “Note 1. Description of Business and Summary of Significant Accounting Policies”. We account for intersegment sales at prices that approximate market prices. For segment reporting purposes, we include our equity in income of unconsolidated entities in segment income, as well as our investments in unconsolidated entities in segment identifiable assets, neither of which is material. Certain income and expenses items are not allocated to our segments and, thus, the information that management uses to make operating decisions and assess performance does not reflect such amounts. Items not allocated are reported as non-allocated expenses or in other line items in the table below after segment income.
	The following table shows selected operating data for our segments (in millions):
		Years Ended September 30,
		2013			2012			2011
	Net sales (aggregate):
	Corrugated Packaging	$	6,661.70		$	6,169.40		$	2,766.30
	Consumer Packaging	1,898.70			1,919.30			1,910.30
	Merchandising Displays	674.6			656			468
	Recycling	494.1			650.5			383.3
	Total	$	9,729.10		$	9,395.20		$	5,527.90
	Less net sales (intersegment):
	Corrugated Packaging	$	115.6		$	122.3		$	81.7
	Consumer Packaging	25.1			25.9			28.4
	Merchandising Displays	17.1			14.6			11.2
	Recycling	25.9			24.8			7
	Total	$	183.7		$	187.6		$	128.3
	Net sales (unaffiliated customers):
	Corrugated Packaging	$	6,546.10		$	6,047.10		$	2,684.60
	Consumer Packaging	1,873.60			1,893.40			1,881.90
	Merchandising Displays	657.5			641.4			456.8
	Recycling	468.2			625.7			376.3
	Total	$	9,545.40		$	9,207.60		$	5,399.60
	Segment income:
	Corrugated Packaging	$	678.8		$	363.7		$	241.1
	Consumer Packaging	231.3			277.2			222.6
	Merchandising Displays	64.4			70.3			53.2
	Recycling	14.4			7.1			14.8
	Segment income	988.9			718.3			531.7
	Restructuring and other costs, net	(78.0		)	(75.2		)	(93.3		)
	Non-allocated expenses	(92.1		)	(109.7		)	(79.5		)
	Interest expense	(106.9		)	(119.7		)	(88.9		)
	Loss on extinguishment of debt	(0.3		)	(25.9		)	(39.5		)
	Interest income and other (expense) income, net	(0.9		)	1.3			(15.0		)
	Income before income taxes	$	710.7		$	389.1		$	215.5
	The following table shows selected operating data for our segments (in millions):
		Years Ended September 30,
		2013			2012			2011
	Identifiable assets:
	Corrugated Packaging	$	8,233.80		$	8,297.10		$	8,155.50
	Consumer Packaging	1,464.40			1,454.10			1,452.10
	Merchandising Displays	349.9			304.6			283.3
	Recycling	231.7			248.9			308.3
	Assets held for sale	14.3			9.6			31.9
	Corporate	439.3			372.8			334.9
	Total	$	10,733.40		$	10,687.10		$	10,566.00
	Goodwill:
	Corrugated Packaging	$	1,447.00		$	1,448.20		$	1,427.40
	Consumer Packaging	327.6			329.6			326.8
	Merchandising Displays	34.6			34.6			33.9
	Recycling	52.9			52.9			$	51.3
Total	$	1,862.10		$	1,865.30		$	1,839.40
Depreciation, depletion and amortization:
Corrugated Packaging	$	426.7		$	410.5		$	163.6
Consumer Packaging	88.8			86.2			85.4
Merchandising Displays	10.8			10.7			6.9
Recycling	12.7			13.4			5
Corporate	13.2			13.5			17.4
Total	$	552.2		$	534.3		$	278.3
Capital expenditures:
Corrugated Packaging	$	306.1		$	327.7		$	74.3
Consumer Packaging	83.5			75.8			100.9
Merchandising Displays	17.1			8			5.4
Recycling	11.3			10.3			14
Corporate	22.4			30.6			4.8
Total	$	440.4		$	452.4		$	199.4
The changes in the carrying amount of goodwill for the fiscal years ended September 30, 2013, 2012 and 2011 are as follows (in millions):
	Corrugated Packaging			Consumer			Merchandising Displays			Recycling		Total
				Packaging
Balance as of October 1, 2010
Goodwill	$	392.1		$	370.4		$	28.9		$	0.2	$	791.6
Accumulated impairment losses	—			(42.7		)	(0.1		)	—		(42.8		)
	392.1			327.7			28.8			0.2		748.8
Goodwill acquired	1,035.40			—			5.1			51.1		1,091.60
Translation adjustment	(0.1		)	(0.9		)	—			—		(1.0		)
Balance as of September 30, 2011
Goodwill	1,427.40			369.5			34			51.3		1,882.20
Accumulated impairment losses	—			(42.7		)	(0.1		)	—		(42.8		)
	1,427.40			326.8			33.9			51.3		1,839.40
Goodwill acquired	33.5			—			—			—		33.5
Purchase price allocation adjustments	(13.2		)	—			0.7			1.6		(10.9		)
Translation adjustment	0.5			2.8			—			—		3.3
Balance as of September 30, 2012
Goodwill	1,448.20			372.3			34.7			52.9		1,908.10
Accumulated impairment losses	—			(42.7		)	(0.1		)	—		(42.8		)
	1,448.20			329.6			34.6			52.9		1,865.30
Goodwill acquired	1.2			—			—			—		1.2
Translation adjustment	(2.4		)	(2.0		)	—			—		(4.4		)
Balance as of September 30, 2013
Goodwill	1,447.00			370.3			34.7			52.9		1,904.90
Accumulated impairment losses	—			(42.7		)	(0.1		)	—		(42.8		)
	$	1,447.00		$	327.6		$	34.6		$	52.9	$	1,862.10
The goodwill acquired in fiscal 2013 related to the acquisition of a corrugated sheet plant. In fiscal 2012, the goodwill acquired was associated with the GMI and Mid South acquisitions. The goodwill acquired in fiscal 2011 was associated with the Smurfit-Stone Acquisition. We finalized the Smurfit-Stone purchase price allocation in fiscal 2012.

Financial_Results_by_Quarter_U

Financial Results by Quarter (Unaudited)	12 Months Ended
	Sep. 30, 2013
Financial Results by Quarter (Unaudited) [Abstract]	'
Financial Results by Quarter	'
	Financial Results by Quarter (Unaudited)
	Fiscal 2013	First			Second			Third			Fourth
		Quarter			Quarter			Quarter			Quarter
		(In millions, except per share data)
	Net sales	$	2,287.10		$	2,324.90		$	2,448.30		$	2,485.10
	Gross profit	409.5			385.2			496.7			555.1
	Restructuring and other costs, net	16.1			12.4			23.5			26
	Loss on extinguishment of debt	(0.2		)	(0.1		)	—			—
	Income before income taxes	141.7			109.1			203.1			256.8
	Consolidated net income	86.9			325.6			141.7			178.3
	Net income attributable to Rock-Tenn Company shareholders	86			324.7			140.1			176.5
	Basic earnings per share attributable to Rock-Tenn Company shareholders	1.2			4.51			1.94			2.45
	Diluted earnings per share attributable to Rock-Tenn Company shareholders	1.18			4.45			1.91			2.4
	Fiscal 2012	First			Second			Third			Fourth
		Quarter			Quarter			Quarter			Quarter
		(In millions, except per share data)
	Net sales	$	2,267.70		$	2,282.90		$	2,303.20		$	2,353.80
	Gross profit	392.2			360.8			359.8			419.9
	Restructuring and other costs, net	10.3			28.1			13.7			23.1
	Loss on extinguishment of debt	—			(19.5		)	(0.1		)	(6.3		)
	Income before income taxes	124.4			53.3			90.6			120.8
	Consolidated net income	76.8			32.7			59.3			83.4
	Net income attributable to Rock-Tenn Company shareholders	76.7			31.9			58.2			82.3
	Basic earnings per share attributable to Rock-Tenn Company shareholders	1.08			0.45			0.82			1.15
	Diluted earnings per share attributable to Rock-Tenn Company shareholders	1.06			0.44			0.81			1.14
	We computed the interim earnings per common and common equivalent share amounts as if each quarter was a discrete period. As a result, the sum of the basic and diluted earnings per share by quarter will not necessarily total the annual basic and diluted earnings per share.
	Consolidated net income in the second quarter of fiscal 2013 financial results by quarter (unaudited) table is impacted by the reversal of $254.1 million of tax reserves related to AFMC acquired in the Smurfit-Stone Acquisition that were partially offset by a resulting increase in a state tax valuation allowance of $1.2 million. Basic and diluted earnings per share attributable to Rock-Tenn Company shareholders were increased approximately $3.51 and $3.47 per share, respectively, in the second quarter of fiscal 2013 in connection with the benefit. Income before income taxes in the third quarter of fiscal 2013 financial results by quarter (unaudited) table is impacted by an $11.4 million reduction in amortization expense related to a restructuring and extension of a steam supply contract. Basic and diluted earnings per share attributable to Rock-Tenn Company shareholders were increased approximately $0.10 per share in the third quarter of fiscal 2013. Income before income taxes in the fourth quarter of fiscal 2013 financial results by quarter (unaudited) table is impacted by income of $12.2 million related to recording an additional value of spare parts at our containerboard mills acquired in the Smurfit-Stone Acquisition, a $9.2 million gain related to the termination of a steam supply contract at our Solvay, NY recycled containerboard mill, net of boiler start-up costs and $8.0 million gain related to a partial insurance settlement of property damage claims associated with the prior year Demopolis, AL bleached paperboard mill. Basic and diluted earnings per share attributable to Rock-Tenn Company shareholders were increased approximately $0.26 per share in the fourth quarter of fiscal 2013 for the before mentioned items.
	Income before income taxes in the fourth quarter of fiscal 2012 financial results by quarter (unaudited) table is impacted by $18.2 million received in connection with the termination and settlement of a paperboard supply agreement, net of legal fees in the period. Basic and diluted earnings per share attributable to Rock-Tenn Company shareholders were increased approximately $0.16 per share in the fourth quarter of fiscal 2012 in connection with the settlement.

Selected_Condensed_Consolidati

Selected Condensed Consolidating Financial Statements of Parent, Guarantors and Non-Guarantors	12 Months Ended
	Sep. 30, 2013
Condensed Financial Statements, Captions [Line Items]	'
Schedule of Condensed Financial Statements for Parent, Guarantors and Non-Guarantors [Text Block]	'
	Selected Condensed Consolidating Financial Statements of Parent, Guarantors and Non-Guarantors
	The Company’s Exchanged Notes are fully and unconditionally guaranteed on a joint and several basis by certain of our 100% owned domestic subsidiaries (collectively referred to as the “Guarantor Subsidiaries”). The total assets, stockholders’ equity, revenues, earnings and cash flows from operating activities of the Guarantor Subsidiaries reflect the majority of the consolidated total of such items as of or for the periods reported. The consolidated subsidiaries of the Company that are not guarantors of the Guaranteed Notes (the “Non-Guarantor Subsidiaries”) include: foreign operations in Canada, Mexico, Chile, Argentina, Puerto Rico and China, certain non-operating U.S. subsidiaries and Joint Ventures not 100% owned.
	In accordance with Rule 3-10 of Regulation S-X, the following tables present condensed consolidating financial statements including Rock-Tenn Company (the “Parent”), the Guarantor Subsidiaries, the Non-Guarantor Subsidiaries and eliminations. Such financial statements include Condensed Consolidating Balance Sheets as of September 30, 2013 and 2012 and the related Condensed Consolidating Statements of Income and Cash Flows for each of the three years in the period ended September 30, 2013.
	CONDENSED CONSOLIDATING STATEMENTS OF INCOME
		Year Ended September 30, 2013
								Non-
					Guarantor			Guarantor						Consolidated
		Parent			Subsidiaries			Subsidiaries			Eliminations			Total
		(In millions)
	Net sales	$	(0.1	)	$	8,553.10		$	1,674.90		$	(682.5	)	$	9,545.40
	Cost of goods sold	—			6,855.70			1,383.00			(539.8		)	7,698.90
	Gross profit	(0.1		)	1,697.40			291.9			(142.7		)	1,846.50
	Selling, general and administrative expenses	—			839.7			114.6			—			954.3
	Restructuring and other costs, net	(3.6		)	67.3			14.3			—			78
	Operating profit	3.5			790.4			163			(142.7		)	814.2
	Interest expense	(103.1		)	(48.1		)	(26.0		)	70.3			(106.9		)
	Loss on extinguishment of debt	(0.1		)	—			(0.2		)	—			(0.3		)
	Interest income and other income (expense), net	52.1			(126.7		)	1.3			72.4			(0.9		)
	Equity in income of unconsolidated entities	—			4.6			—			—			4.6
	Equity in income of consolidated entities	753.8			77.4			—			(831.2		)	—
	Income before income taxes	706.2			697.6			138.1			(831.2		)	710.7
	Income tax benefit (expense)	21.1			26			(25.3		)	—			21.8
	Consolidated net income	727.3			723.6			112.8			(831.2		)	732.5
	Less: Net income attributable to noncontrolling interests	—			(4.0		)	(1.2		)	—			(5.2		)
	Net income attributable to Rock-Tenn Company shareholders	$	727.3		$	719.6		$	111.6		$	(831.2	)	$	727.3
	Comprehensive income attributable to Rock-Tenn Company shareholders	$	927.3		$	920.3		$	84.2		$	(1,004.5	)	$	927.3
	CONDENSED CONSOLIDATING STATEMENTS OF INCOME
		Year Ended September 30, 2012
								Non-
					Guarantor			Guarantor						Consolidated
		Parent			Subsidiaries			Subsidiaries			Eliminations			Total
		(In millions)
	Net sales	$	0.1		$	8,225.30		$	1,648.30		$	(666.1	)	$	9,207.60
	Cost of goods sold	—			6,816.50			1,366.10			(507.7		)	7,674.90
	Gross profit	0.1			1,408.80			282.2			(158.4		)	1,532.70
	Selling, general and administrative expenses	2.3			797.7			127.5			—			927.5
	Restructuring and other costs, net	2.6			47.6			25			—			75.2
	Operating profit	(4.8		)	563.5			129.7			(158.4		)	530
	Interest expense	(106.4		)	(46.3		)	(29.4		)	62.4			(119.7		)
	Loss on extinguishment of debt	(25.9		)	—			—			—			(25.9		)
	Interest income and other income (expense), net	51.7			(147.0		)	0.6			96			1.3
	Equity in income of unconsolidated entities	—			3.4			—			—			3.4
	Equity in income of consolidated entities	302.4			15.7			—			(318.1		)	—
	Income before income taxes	217			389.3			100.9			(318.1		)	389.1
	Income tax benefit (expense)	32.1			(134.9		)	(34.1		)	—			(136.9		)
	Consolidated net income	249.1			254.4			66.8			(318.1		)	252.2
	Less: Net income attributable to noncontrolling interests	—			(2.7		)	(0.4		)	—			(3.1		)
	Net income attributable to Rock-Tenn Company shareholders	$	249.1		$	251.7		$	66.4		$	(318.1	)	$	249.1
	Comprehensive income attributable to Rock-Tenn Company shareholders	$	47.8		$	46.7		$	63.6		$	(110.3	)	$	47.8
	CONDENSED CONSOLIDATING STATEMENTS OF INCOME
		Year Ended September 30, 2011
								Non-
					Guarantor			Guarantor						Consolidated
		Parent			Subsidiaries			Subsidiaries			Eliminations			Total
		(In millions)
	Net sales	$	0.5		$	4,815.60		$	956.1		$	(372.6	)	$	5,399.60
	Cost of goods sold	0.6			3,932.60			738.8			(264.3		)	4,407.70
	Gross profit	(0.1		)	883			217.3			(108.3		)	991.9
	Selling, general and administrative expenses	1.7			447.6			91.9			—			541.2
	Restructuring and other costs, net	19.4			72.7			1.2			—			93.3
	Operating profit	(21.2		)	362.7			124.2			(108.3		)	357.4
	Interest expense	(84.2		)	(125.1		)	(21.7		)	142.1			(88.9		)
	Loss on extinguishment of debt	(38.6		)	(0.9		)	—			—			(39.5		)
Interest income and other income (expense), net	61.5			(40.4		)	(2.3		)	(33.8		)	(15.0		)
Equity in income (loss) of unconsolidated entities	—			1.9			(0.4		)	—			1.5
Equity in income of consolidated entities	191.2			44.6			0.1			(235.9		)	—
Income before income taxes	108.7			242.8			99.9			(235.9		)	215.5
Income tax benefit (expense)	32.4			(73.0		)	(28.9		)	—			(69.5		)
Consolidated net income	141.1			169.8			71			(235.9		)	146
Less: Net income attributable to noncontrolling interests	—			(4.9		)	—			—			(4.9		)
Net income attributable to Rock-Tenn Company shareholders	$	141.1		$	164.9		$	71		$	(235.9	)	$	141.1
Comprehensive (loss) income attributable to Rock-Tenn Company shareholders	$	(65.9	)	$	(45.6	)	$	21.7		$	23.9		$	(65.9	)
CONDENSED CONSOLIDATING BALANCE SHEETS
	30-Sep-13
							Non-
				Guarantor			Guarantor						Consolidated
	Parent			Subsidiaries			Subsidiaries			Eliminations			Total
	(In millions)
ASSETS
Current assets:
Cash and cash equivalents	$	14.8		$	1.2		$	20.4		$	—		$	36.4
Restricted cash	9.3			—			—			—			9.3
Accounts receivable, net	—			84.7			1,098.00			(47.8		)	1,134.90
Inventories	—			779.6			158.3			—			937.9
Other current assets	20.3			265.7			32.1			(20.2		)	297.9
Intercompany receivables	56.3			26.8			44.5			(127.6		)	—
Total current assets	100.7			1,158.00			1,353.30			(195.6		)	2,416.40
Net property, plant and equipment	—			5,098.50			456.2			—			5,554.70
Goodwill	—			1,762.60			99.5			—			1,862.10
Intangibles, net	—			688.2			11.2			—			699.4
Intercompany notes receivable	503.5			645.9			1.3			(1,150.7		)	—
Investments in consolidated subsidiaries	6,230.40			364			—			(6,594.4		)	—
Other assets	42.2			124.9			41.7			(8.0		)	200.8
	$	6,876.80		$	9,842.10		$	1,963.20		$	(7,948.7	)	$	10,733.40
LIABILITIES AND EQUITY
Current liabilities:
Current portion of debt	$	—		$	—		$	2.9		$	—		$	2.9
Accounts payable	—			733.2			116.7			(47.8		)	802.1
Accrued compensation and benefits	—			220.9			28.1			—			249
Other current liabilities	15.3			148.8			45.5			(20.2		)	189.4
Intercompany payables	0.5			76.6			50.5			(127.6		)	—
Total current liabilities	15.8			1,179.50			243.7			(195.6		)	1,243.40
Long-term debt due after one year	2,391.10			—			450.8			—			2,841.90
Intercompany notes payable	152.9			469.1			528.7			(1,150.7		)	—
Pension liabilities, net of current portion	—			811.8			163.4			—			975.2
Postretirement benefit liabilities, net of current portion	—			74.3			44			—			118.3
Deferred income taxes	—			1,061.00			10.1			(8.0		)	1,063.10
Other long-term liabilities	4.7			157.4			3.3			—			165.4
Redeemable noncontrolling interests	—			8.1			5.2			—			13.3
Total Rock-Tenn Company shareholders' equity	4,312.30			6,080.40			514			(6,594.4		)	4,312.30
Noncontrolling interests	—			0.5			—			—			0.5
Total equity	4,312.30			6,080.90			514			(6,594.4		)	4,312.80
	$	6,876.80		$	9,842.10		$	1,963.20		$	(7,948.7	)	$	10,733.40
CONDENSED CONSOLIDATING BALANCE SHEETS
	30-Sep-12
							Non-
				Guarantor			Guarantor						Consolidated
	Parent			Subsidiaries			Subsidiaries			Eliminations			Total
	(In millions)
ASSETS
Current assets:
Cash and cash equivalents	$	—		$	—		$	37.2		$	—		$	37.2
Restricted cash	40.6			—			—			—			40.6
Accounts receivable, net	—			110.5			1,026.60			(61.5		)	1,075.60
Inventories	—			700.1			161.8			—			861.9
Other current assets	33.2			142.8			25.7			(27.2		)	174.5
Intercompany receivables	396.8			793.1			148.2			(1,338.1		)	—
Total current assets	470.6			1,746.50			1,399.50			(1,426.8		)	2,189.80
Net property, plant and equipment	—			5,102.90			508.5			—			5,611.40
Goodwill	—			1,761.40			103.9			—			1,865.30
Intangibles, net	—			782.9			12.2			—			795.1
Intercompany notes receivable	768			403.3			0.7			(1,172.0		)	—
Investments in consolidated subsidiaries	5,642.30			365.8			—			(6,008.1		)	—
Other assets	42.9			123.6			59			—			225.5
	$	6,923.80		$	10,286.40		$	2,083.80		$	(8,606.9	)	$	10,687.10
LIABILITIES AND EQUITY
Current liabilities:
Current portion of debt	$	202.9		$	—		$	58.4		$	—		$	261.3
Accounts payable	—			642.4			128			(61.5		)	708.9
Accrued compensation and benefits	—			178.2			33.2			—			211.4
Other current liabilities	43.7			160.7			49.5			(27.2		)	226.7
Intercompany payables	602.4			658			77.7			(1,338.1		)	—
Total current liabilities	849			1,639.30			346.8			(1,426.8		)	1,408.30
Long-term debt due after one year	2,555.70			—			595.5			—			3,151.20
Intercompany notes payable	109.3			733.9			328.8			(1,172.0		)	—
Pension liabilities, net of current portion	—			1,283.00			210.1			—			1,493.10
Postretirement benefit liabilities, net of current portion	—			102.1			52.1			—			154.2
Deferred income taxes	—			861.3			27.5			—			888.8
Other long-term liabilities	4.1			166.5			3.3			—			173.9
Redeemable noncontrolling interests	—			7.5			3.9			—			11.4
Total Rock-Tenn Company shareholders' equity	3,405.70			5,492.30			515.8			(6,008.1		)	3,405.70
Noncontrolling interests	—			0.5			—			—			0.5
Total equity	3,405.70			5,492.80			515.8			(6,008.1		)	3,406.20
	$	6,923.80		$	10,286.40		$	2,083.80		$	(8,606.9	)	$	10,687.10
CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS
	Year Ended September 30, 2013
							Non-
				Guarantor			Guarantor						Consolidated
	Parent			Subsidiaries			Subsidiaries			Eliminations			Total
	(In millions)
Operating activities:
Net cash provided by (used for) operating activities	$	409		$	1,053.20		$	(43.4	)	$	(386.3	)	$	1,032.50
Investing activities:
Capital expenditures	—			(419.4		)	(21.0		)	—			(440.4		)
Cash paid for purchase of business, net of cash acquired	—			(6.3		)	—			—			(6.3		)
Investment in unconsolidated entities	—			(0.1		)	—			—			(0.1		)
Return of capital from unconsolidated entities	—			1			—			—			1
Proceeds from sale of property, plant and equipment	—			16			10.8			—			26.8
Proceeds from property, plant and equipment insurance settlement	—			15.4			—			—			15.4
Intercompany notes issued	(468.8		)	(562.6		)	—			1,031.40			—
Intercompany notes proceeds	732.8			319.9			—			(1,052.7		)	—
Intercompany return of capital	0.8			0.4			—			(1.2		)	—
Net cash provided by (used for) investing activities	264.8			(635.7		)	(10.2		)	(22.5		)	(403.6		)
Financing activities:
Additions to revolving credit facilities	74.3			—			24.7			—			99
Repayments of revolving credit facilities	(86.9		)	—			(59.3		)	—			(146.2		)
Additions to debt	—			—			277			—			277
Repayments of debt	(355.6		)	—			(431.8		)	—			(787.4		)
Debt issuance costs	(1.0		)	—			(1.0		)	—			(2.0		)
Cash paid for debt extinguishment costs	(0.1		)	—			—			—			(0.1		)
Issuances of common stock, net of related minimum tax withholdings	3.5			—			—			—			3.5
Excess tax benefits from share-based compensation	—			6			—			—			6
(Repayments to) advances from consolidated entities	(261.5		)	185.4			76.1			—			—
Advances from unconsolidated entity	—			1.2			—			—			1.2
Cash dividends paid to shareholders	(75.3		)	—			—			—			(75.3		)
Cash distributions paid to noncontrolling interests	—			—			(4.9		)	—			(4.9		)
Intercompany notes borrowing	43.6			467.8			520			(1,031.4		)	—
Intercompany notes payments	—			(732.6		)	(320.1		)	1,052.70			—
Intercompany capital return	—			(0.8		)	(0.4		)	1.2			—
Intercompany dividends	—			(343.3		)	(43.0		)	386.3			—
Net cash (used for) provided by financing activities	(659.0		)	(416.3		)	37.3			408.8			(629.2		)
Effect of exchange rate changes on cash and cash equivalents	—			—			(0.5		)	—			(0.5		)
Increase (decrease) in cash and cash equivalents	14.8			1.2			(16.8		)	—			(0.8		)
Cash and cash equivalents at beginning of period	—			—			37.2			—			37.2
Cash and cash equivalents at end of period	$	14.8		$	1.2		$	20.4		$	—		$	36.4
CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS
	Year Ended September 30, 2012
							Non-
				Guarantor			Guarantor						Consolidated
	Parent			Subsidiaries			Subsidiaries			Eliminations			Total
	(In millions)
Operating activities:
Net cash provided by (used for) operating activities	$	132.9		$	540		$	151.4		$	(167.6	)	$	656.7
Investing activities:
Capital expenditures	—			(426.5		)	(25.9		)	—			(452.4		)
Cash paid for the purchase of a leased facility	—			(17.0		)	—			—			(17.0		)
Cash paid for purchase of business, net of cash acquired	(93.5		)	(32.1		)	—			—			(125.6		)
Investment in unconsolidated entities	—			(1.7		)	—			—			(1.7		)
Return of capital from unconsolidated entities	—			1.8			—			—			1.8
Proceeds from sale of property, plant and equipment	—			17.9			22.6			—			40.5
Proceeds from property, plant and equipment insurance settlement	—			10.2			—			—			10.2
Intercompany notes issued	(36.1		)	(156.2		)	—			192.3			—
Intercompany notes proceeds	27.6			1.8			—			(29.4		)	—
Intercompany capital investment	(89.3		)	—			—			89.3			—
Intercompany return of capital	378.9			—			—			(378.9		)	—
Net cash provided by (used for) investing activities	187.6			(601.8		)	(3.3		)	(126.7		)	(544.2		)
Financing activities:
Proceeds from issuance of notes	1,442.20			—			—			—			1,442.20
Additions to revolving credit facilities	687.4			—			60.7			—			748.1
Repayments of revolving credit facilities	(674.4		)	—			(85.4		)	—			(759.8		)
Additions to debt	227.1			—			99.5			—			326.6
Repayments of debt	(1,527.6		)	(28.8		)	(247.2		)	—			(1,803.6		)
Debt issuance costs	(16.2		)	—			—			—			(16.2		)
Cash paid for debt extinguishment costs	(14.0		)	—			—			—			(14.0		)
Issuances of common stock, net of related minimum tax withholdings	5.2			—			—			—			5.2
Excess tax benefits from share-based compensation	—			10			—			—			10
(Repayments to) advances from consolidated entities	(470.6		)	505.9			(35.3		)	—			—
Advances from unconsolidated entity	—			0.2			—			—			0.2
Cash dividends paid to shareholders	(56.5		)	—			—			—			(56.5		)
Cash distributions paid to noncontrolling interests	—			—			(0.8		)	—			(0.8		)
Intercompany notes borrowing	76.9			35.6			79.8			(192.3		)	—
Intercompany notes payments	—			(10.0		)	(19.4		)	29.4			—
Intercompany capital receipt	—			39.3			50			(89.3		)	—
Intercompany capital return	—			(378.9		)	—			378.9			—
Intercompany dividends	—			(115.1		)	(52.5		)	167.6			—
Net cash (used for) provided by financing activities	(320.5		)	58.2			(150.6		)	294.3			(118.6		)
Effect of exchange rate changes on cash and cash equivalents	—			—			1.6			—			1.6
(Decrease) in cash and cash equivalents	—			(3.6		)	(0.9		)	—			(4.5		)
Cash and cash equivalents at beginning of period	—			3.6			38.1			—			41.7
Cash and cash equivalents at end of period	$	—		$	—		$	37.2		$	—		$	37.2
CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS
	Year Ended September 30, 2011
							Non-
				Guarantor			Guarantor						Consolidated
	Parent			Subsidiaries			Subsidiaries			Eliminations			Total
	(In millions)
Operating activities:
Net cash provided by (used for) operating activities	$	50.3		$	1,051.60		$	(601.1	)	$	(39.1	)	$	461.7
Investing activities:
Capital expenditures	—			(172.2		)	(27.2		)	—			(199.4		)
Cash paid for purchase of business, net of cash acquired	(1,300.1		)	—			—			—			(1,300.1		)
Investment in unconsolidated entities	—			(2.0		)	—			—			(2.0		)
Return of capital from unconsolidated entities	—			0.8			0.2			—			1
Proceeds from sale of property, plant and equipment	—			7.4			1.2			—			8.6
Proceeds from property, plant and equipment insurance settlement	—			0.5			—			—			0.5
Intercompany notes issued	(16.7		)	(39.5		)	—			56.2			—
Intercompany notes proceeds	174.4			270			8.9			(453.3		)	—
Intercompany capital investment	(1,171.7		)	(207.1		)	—			1,378.80			—
Intercompany return of capital	102.3			2.1			—			(104.4		)	—
Net cash (used for) provided by investing activities	(2,211.8		)	(140.0		)	(16.9		)	877.3			(1,491.4		)
Financing activities:
Additions to revolving credit facilities	553.2			—			249.4			—			802.6
Repayments of revolving credit facilities	(562.5		)	—			(2.0		)	—			(564.5		)
Additions to debt	2,225.00			—			652.4			—			2,877.40
Repayments of debt	(626.6		)	(1,169.1		)	(170.6		)	—			(1,966.3		)
Debt issuance costs	(43.8		)	—			—			—			(43.8		)
Cash paid for debt extinguishment costs	(37.9		)	—			—			—			(37.9		)
Issuances of common stock, net of related minimum tax withholdings	25.2			—			—			—			25.2
Advances from (repayments to) consolidated entities	657.9			(598.5		)	(59.4		)	—			—
Advances from unconsolidated entity	—			1.7			—			—			1.7
Cash dividends paid to shareholders	(37.6		)	—			—			—			(37.6		)
Cash distributions paid to noncontrolling interests	—			—			(5.2		)	—			(5.2		)
Intercompany notes borrowing	17.5			—			38.7			(56.2		)	—
Intercompany notes payments	(8.9		)	(174.4		)	(270.0		)	453.3			—
Intercompany capital receipt	—			1,136.70			242.1			(1,378.8		)	—
Intercompany capital return	—			(102.3		)	(2.1		)	104.4			—
Intercompany dividends	—			(2.7		)	(36.4		)	39.1			—
Net cash provided by (used for) financing activities	2,161.50			(908.6		)	636.9			(838.2		)	1,051.60
Effect of exchange rate changes on cash and cash equivalents	—			—			3.9			—			3.9
Increase in cash and cash equivalents	—			3			22.8			—			25.8
Cash and cash equivalents at beginning of period	—			0.6			15.3			—			15.9
Cash and cash equivalents at end of period	$	—		$	3.6		$	38.1		$	—		$	41.7

Description_of_Business_and_Su1

Description of Business and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Sep. 30, 2013
Description of Business and Summary of Significant Accounting Policies [Abstract]	'
Consolidation, Policy [Policy Text Block]	'
	Consolidation
	The consolidated financial statements include our accounts and the accounts of our partially-owned consolidated subsidiaries. Equity investments in which we exercise significant influence but do not control and are not the primary beneficiary are accounted for using the equity method. Investments in which we are not able to exercise significant influence over the investee are accounted for under the cost method. Our equity and cost method investments are not significant either individually or in the aggregate. We have eliminated all significant intercompany accounts and transactions.
Use of Estimates, Policy [Policy Text Block]	'
	Use of Estimates
	Preparing consolidated financial statements in conformity with generally accepted accounting principles in the United States requires us to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results may differ from those estimates, and the differences could be material.
	The most significant accounting estimates inherent in the preparation of our consolidated financial statements include estimates to evaluate the recoverability of goodwill, intangibles and property, plant and equipment, to determine the useful lives of assets that are amortized or depreciated, and to measure income taxes, self-insured obligations, restructuring activities and allocate the purchase price of an acquired business to the fair value of acquired assets and liabilities. In addition, significant estimates form the basis for our reserves with respect to collectibility of accounts receivable, inventory valuations, pension benefits, deferred tax asset valuation allowances and certain benefits provided to current employees. Various assumptions and other factors underlie the determination of these significant estimates. The process of determining significant estimates is fact specific and takes into account factors such as historical experience, current and expected economic conditions, product mix, and in some cases, actuarial techniques. We regularly evaluate these significant factors and make adjustments where facts and circumstances dictate.
Revenue Recognition, Policy [Policy Text Block]	'
	Revenue Recognition
	We recognize revenue when there is persuasive evidence that an arrangement exists, delivery has occurred or services have been rendered, our price to the buyer is fixed or determinable and collectibility is reasonably assured. Delivery is not considered to have occurred until the customer takes title and assumes the risks and rewards of ownership. The timing of revenue recognition is dependent on the location of title transfer which is normally either on the exit from our plants (i.e., shipping point) or on arrival at customers’ plants (i.e., destination point). We do not recognize revenue from transactions where we bill customers but retain custody and title to these products until the date custody and title transfer. We do not have any significant multiple deliverable revenue arrangements.
	We net, against our gross sales, provisions for discounts, returns, allowances, customer rebates and other adjustments. We account for such provisions during the same period in which we record the related revenues. We include in net sales any amounts related to shipping and handling that are billed to a customer.
Shipping and Handling Cost, Policy [Policy Text Block]	'
	Shipping and Handling Costs
	We classify shipping and handling costs as a component of cost of goods sold.
Cash and Cash Equivalents, Policy [Policy Text Block]	'
	Cash Equivalents
	We consider all highly liquid investments that mature three months or less from the date of purchase to be cash equivalents. The carrying amounts we report in the consolidated balance sheets for cash and cash equivalents approximate fair market values. We place our cash and cash equivalents with large credit worthy banks, which limits the amount of our credit exposure.
Receivables, Policy [Policy Text Block]	'
	Accounts Receivable and Allowances
	We perform periodic evaluations of our customers’ financial condition and generally do not require collateral. Receivables generally are due within 30 to 60 days, although recent trends are for customers to seek longer terms. We serve a diverse customer base primarily in North America and, therefore, have limited exposure from credit loss to any particular customer or industry segment.
	We state accounts receivable at the amount owed by the customer, net of an allowance for estimated uncollectible accounts, returns and allowances, cash discounts and other adjustments. We do not discount accounts receivable because we generally collect accounts receivable over a relatively short time. We account for sales and other taxes that are imposed on and concurrent with individual revenue-producing transactions between a customer and us on a net basis which excludes the taxes from our net sales. We estimate our allowance for doubtful accounts based on our historical experience, current economic conditions and the credit worthiness of our customers. We charge off receivables when they are determined to be no longer collectible. In fiscal 2013, 2012 and 2011, we recorded bad debt expense of $5.6 million, $6.6 million and $1.1 million, respectively.
	The following table represents a summary of the changes in the reserve for allowance for doubtful accounts, returns and allowances and cash discounts for fiscal 2013, 2012 and 2011 (in millions):
		2013			2012			2011
	Balance at the beginning of period	$	26.9		$	30.1		$	7.8
	Reduction in sales and charges to costs and expenses (1)	126.4			107.9			78.2
	Deductions	(126.5		)	(111.1		)	(55.9		)
	Balance at the end of period	$	26.8		$	26.9		$	30.1
	(1) Includes the impact of acquisitions.
Inventory, Policy [Policy Text Block]	'
	Inventories
	We value substantially all U.S. inventories at the lower of cost or market, with cost determined on the last-in first-out basis. We value all other inventories at the lower of cost or market, with cost determined using methods that approximate cost computed on a first-in first-out basis. These other inventories represent primarily foreign inventories, spare parts inventories and certain inventoried supplies and aggregate to approximately 24% and 29% of FIFO cost of all inventory at September 30, 2013 and 2012, respectively.
	Prior to the application of the LIFO method, our U.S. operating divisions use a variety of methods to estimate the FIFO cost of their finished goods inventories. Such methods include standard costs, or average costs computed by dividing the actual cost of goods manufactured by the tons produced and multiplying this amount by the tons of inventory on hand. Lastly, certain operations calculate a ratio, on a plant by plant basis, the numerator of which is the cost of goods sold and the denominator is net sales. This ratio is applied to the estimated sales value of the finished goods inventory. Variances and other unusual items are analyzed to determine whether it is appropriate to include those items in the value of inventory. Examples of variances and unusual items that are considered to be current period charges include, but are not limited to, abnormal production levels, freight, handling costs, and wasted materials (spoilage). Cost includes raw materials and supplies, direct labor, indirect labor related to the manufacturing process and depreciation and other factory overheads.
Property, Plant and Equipment, Policy [Policy Text Block]	'
	Property, Plant and Equipment
	We state property, plant and equipment at cost. Cost includes major expenditures for improvements and replacements that extend useful lives, increase capacity, increase revenues or reduce costs. During fiscal 2013, 2012 and 2011, we capitalized interest of approximately $2.9 million, $3.4 million and $2.8 million, respectively. For financial reporting purposes, we provide depreciation and amortization primarily on a straight-line method over the estimated useful lives of the assets as follows:
	Buildings and building improvements		15-40 years
	Machinery and equipment		3-44 years
	Transportation equipment		3-8 years
	Generally our machinery and equipment have estimated useful lives between 3 and 20 years; however, select portions of machinery and equipment at our mills have estimated useful lives up to 44 years. Leasehold improvements are depreciated over the shorter of the asset life or the lease term, generally between 3 and 10 years. Depreciation expense for fiscal 2013, 2012 and 2011 was approximately $461.3 million, $434.6 million and $228.2 million, respectively.
Goodwill and Intangible Assets, Policy [Policy Text Block]	'
	Goodwill and Long-Lived Assets
	We review the carrying value of our goodwill annually at the beginning of the fourth quarter of each fiscal year, or more often if events or changes in circumstances indicate that the carrying amount may exceed fair value as set forth in ASC 350, “Intangibles — Goodwill and Other”. We test goodwill for impairment at the reporting unit level, which is an operating segment or one level below an operating segment, which is referred to as a component. A component of an operating segment is a reporting unit if the component constitutes a business for which discrete financial information is available and segment management regularly reviews the operating results of that component. However, two or more components of an operating segment are aggregated and deemed a single reporting unit if the components have similar economic characteristics. The amount of goodwill acquired in a business combination that is assigned to one or more reporting units as of the acquisition date is the excess of the purchase price of the acquired businesses (or portion thereof) included in the reporting unit, over the fair value assigned to the individual assets acquired or liabilities assumed. Goodwill is assigned to the reporting unit(s) expected to benefit from the synergies of the combination even though other assets or liabilities of the acquired entity may not be assigned to that reporting unit. We determine recoverability by comparing the estimated fair value of the reporting unit to which the goodwill applies to the carrying value, including goodwill, of that reporting unit using a discounted cash flow model.
	The goodwill impairment model is a two-step process. An amendment to ASC 350 became effective December 2011 that allows a qualitative assessment, prior to step one, to determine whether it is more likely than not that the fair value of a reporting unit exceeds its carrying amount. We did not attempt a qualitative assessment and moved directly to step one. In step one, we utilize the present value of expected net cash flows to determine the estimated fair value of our reporting units. This present value model requires management to estimate future net cash flows, the timing of these cash flows, and a discount rate (based on a weighted average cost of capital), which represents the time value of money and the inherent risk and uncertainty of the future cash flows. Factors that management must estimate when performing this step in the process include, among other items, sales volume, prices, inflation, discount rates, exchange rates, tax rates, anticipated synergies resulting from the Smurfit-Stone Acquisition and capital spending. The assumptions we use to estimate future cash flows are consistent with the assumptions that the reporting units use for internal planning purposes, updated to reflect current expectations. If we determine that the estimated fair value of the reporting unit exceeds its carrying amount, goodwill of the reporting unit is not impaired. If we determine that the carrying amount of the reporting unit exceeds its estimated fair value, we complete step two of the impairment analysis. Step two involves determining the implied fair value of the reporting unit’s goodwill and comparing it to the carrying amount of that goodwill. If the carrying amount of the reporting unit’s goodwill exceeds the implied fair value of that goodwill, we recognize an impairment loss in an amount equal to that excess. We completed the annual test of the goodwill associated with each of our reporting units during fiscal 2013 and concluded the fair values were in excess of the carrying values of each of the reporting units. No events have occurred since the latest annual goodwill impairment assessment that would necessitate an interim goodwill impairment assessment.
	We follow provisions included in ASC 360, “Property, Plant and Equipment” in determining whether the carrying value of any of our long-lived assets, including amortizing intangibles other than goodwill, is impaired. The ASC 360 test is a three-step test for assets that are “held and used” as that term is defined by ASC 360. We determine whether indicators of impairment are present. We review long-lived assets for impairment when events or changes in circumstances indicate that the carrying amount of the long-lived asset might not be recoverable. If we determine that indicators of impairment are present, we determine whether the estimated undiscounted cash flows for the potentially impaired assets are less than the carrying value. This requires management to estimate future net cash flows through operations over the remaining useful life of the asset and its ultimate disposition. The assumptions we use to estimate future cash flows are consistent with the assumptions we use for internal planning purposes, updated to reflect current expectations. If our estimated undiscounted cash flows do not exceed the carrying value, we estimate the fair value of the asset and record an impairment charge if the carrying value is greater than the fair value of the asset. We estimate fair value using discounted cash flows, observable prices for similar assets, or other valuation techniques. We record assets classified as “held for sale” at the lower of their carrying value or estimated fair value less anticipated costs to sell.
	Included in our long-lived assets are certain identifiable intangible assets. These intangible assets are amortized based on the approximate pattern in which the economic benefits are consumed or straight-line if the pattern was not reliably determinable. Estimated useful lives range from 2 to 40 years and have a weighted average life of approximately 12.4 years.
	Our judgments regarding the existence of impairment indicators are based on legal factors, market conditions and operational performance. Future events could cause us to conclude that impairment indicators exist and that assets associated with a particular operation are impaired. Evaluating impairment also requires us to estimate future operating results and cash flows, which also require judgment by management. Any resulting impairment loss could have a material adverse impact on our financial condition and results of operations.
Costs Associated with Exit or Disposal Activities or Restructurings, Policy [Policy Text Block]	'
	Restructuring
	We have restructured portions of our operations from time to time, have current restructuring initiatives taking place, and it is possible that we may engage in future restructuring activities. Identifying and calculating the cost to exit these operations requires certain assumptions to be made, the most significant of which are anticipated future liabilities, including leases and other contractual obligations, and the adjustment of property, plant and equipment to net realizable value. We believe our estimates are reasonable, considering our knowledge of the industries we operate in, previous experience in exiting activities and valuations we may obtain from independent third parties. Although our estimates have been reasonably accurate in the past, significant judgment is required, and these estimates and assumptions may change as additional information becomes available and facts or circumstances change.
Business Combinations Policy [Policy Text Block]	'
	Business Combinations
	From time to time, we enter into material business combinations. In accordance with ASC 805, “Business Combinations”, we generally recognize the identifiable assets acquired, the liabilities assumed, and any noncontrolling interests in an acquiree at their fair values as of the date of acquisition. We measure goodwill as the excess of consideration transferred, which we also measure at fair value, over the net of the acquisition date fair values of the identifiable assets acquired and liabilities assumed. The acquisition method of accounting requires us to make significant estimates and assumptions regarding the fair values of the elements of a business combination as of the date of acquisition, including the fair values of identifiable intangible assets, deferred tax asset valuation allowances, liabilities related to uncertain tax positions, contingent consideration and contingencies. This method also requires us to refine these estimates over a measurement period not to exceed one year to reflect new information obtained about facts and circumstances that existed as of the acquisition date that, if known, would have affected the measurement of the amounts recognized as of that date. If we are required to retroactively adjust provisional amounts that we have recorded for the fair values of assets and liabilities in connection with acquisitions, these adjustments could have a material impact on our financial condition and results of operations.
	Significant estimates and assumptions in estimating the fair value of acquired technology, customer relationships, and other identifiable intangible assets include future cash flows that we expect to generate from the acquired assets. If the subsequent actual results and updated projections of the underlying business activity change compared with the assumptions and projections used to develop these values, we could record impairment charges. In addition, we have estimated the economic lives of certain acquired assets and these lives are used to calculate depreciation and amortization expense. If our estimates of the economic lives change, depreciation or amortization expenses could be increased or decreased, or the acquired asset could be impaired.
Fair Value of Financial Instruments, Policy [Policy Text Block]	'
	Fair Value of Financial Instruments and Nonfinancial Assets and Liabilities
	We estimate fair values in accordance with ASC 820 “Fair Value Measurement”. We define fair value as the price that would be received from the sale of an asset or paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date.
	Financial instruments not recognized at fair value on a recurring or nonrecurring basis include cash and cash equivalents, accounts receivables, certain other current assets, short-term debt, accounts payable, certain other current liabilities and long-term debt. With the exception of long-term debt, the carrying amounts of these financial instruments approximate their fair values due to their short maturities. The fair values of our long-term debt are estimated using quoted market prices or are based on the discounted value of future cash flows. We disclose the fair value of long-term debt and our pension and postretirement assets and liabilities in “Note 9. Fair Value” and “Note 12. Retirement Plans” of the Notes to Consolidated Financial Statements. We have, or from time to time may have, financial instruments recognized at fair value including supplemental retirement savings plans that are nonqualified deferred compensation plans pursuant to which assets are invested primarily in mutual funds, interest rate derivatives, commodity derivatives or other similar class of assets or liabilities, the fair value of which are not significant. We measure the fair value of our mutual fund investments based on quoted prices in active markets, and our derivative contracts and our residual interest in Timber Note Holdings LLC notes based on discounted cash flows.
	We measure certain nonfinancial assets and nonfinancial liabilities at fair value on a nonrecurring basis. These assets and liabilities include cost and equity method investments when they are deemed to be other-than-temporarily impaired, assets acquired and liabilities assumed in an acquisition or in a nonmonetary exchange, and property, plant and equipment and goodwill and other intangible assets that are written down to fair value when they are held for sale or determined to be impaired. Given the nature of nonfinancial assets and liabilities, evaluating their fair value from the perspective of a market participant is inherently complex. Assumptions and estimates about future values can be affected by a variety of internal and external factors. Changes in these factors may require us to revise our estimates and could result in future impairment charges for goodwill and acquired intangible assets, or retroactively adjust provisional amounts that we have recorded for the fair values of assets and liabilities in connection with business combinations. These adjustments could have a material impact on our financial condition and results of operations. We discuss fair values in more detail in “Note 9. Fair Value.”
Derivatives, Policy [Policy Text Block]	'
	Derivatives
	We are exposed to interest rate risk, commodity price risk and foreign currency exchange risk. To manage these risks, from time to time and to varying degrees, we may enter into a variety of financial derivative transactions and certain physical commodity transactions that are determined to be derivatives. Interest rate swaps may be entered into to manage the interest rate risk associated with a portion of our outstanding debt. Interest rate swaps are either designated for accounting purposes as cash flow hedges of forecasted floating interest payments on variable rate debt or fair value hedges of fixed rate debt, or we may elect not to treat them as accounting hedges. Forward contracts on certain commodities may be entered into to manage the price risk associated with forecasted purchases or sales of those commodities. In addition, certain commodity financial derivative contracts and physical commodity contracts that are determined to be derivatives may not be designated as accounting hedges because either they do not meet the criteria for treatment as accounting hedges under ASC 815, “Derivatives and Hedging”, or we elect not to treat them as accounting hedges under ASC 815. We may also enter into forward contracts to manage our exposure to fluctuations in Canadian foreign currency rates with respect to transactions denominated in Canadian dollars.
	Outstanding financial derivative instruments expose us to credit loss in the event of nonperformance by the counterparties to the agreements. Our credit exposure related to these financial instruments is represented by the fair value of contracts reported as assets. We manage our exposure to counterparty credit risk through minimum credit standards, diversification of counterparties and procedures to monitor concentrations of credit risk. We may enter into financial derivative contracts that may contain credit-risk-related contingent features which could result in a counterparty requesting immediate payment or demanding immediate and ongoing full overnight collateralization on derivative instruments in net liability positions.
	For financial derivative instruments that are designated as a cash flow hedge for accounting purposes, the effective portion of the gain or loss on the financial derivative instrument is reported as a component of other comprehensive income and reclassified into earnings in the same line item associated with the forecasted transaction, and in the same period or periods during which the forecasted transaction affects earnings. Gains and losses on the financial derivative representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness are recognized in current earnings.
	We have at times entered into interest rate swap agreements that effectively modified our exposure to interest rate risk by converting a portion of our interest payments on floating rate debt to a fixed rate basis, thus reducing the impact of interest rate changes on future interest expense. These agreements typically involved the receipt of floating rate amounts in exchange for fixed interest rate payments over the life of the agreements without an exchange of the underlying principal amount.
	The impact of derivative instruments have not been material in any of the years presented.
Health Care Costs, Policy [Policy Text Block]	'
	Health Insurance
	We are self-insured for the majority of our group health insurance costs. We calculate our group health insurance reserve on an undiscounted basis based on estimated reserve rates. We utilize claims lag data provided by our claims administrators to compute the required estimated reserve rate. We calculate our average monthly claims paid using the actual monthly payments during the trailing 12-month period. At that time, we also calculate our required reserve using the reserve rates discussed above. While we believe that our assumptions are appropriate, significant differences in our actual experience or significant changes in our assumptions may materially affect our group health insurance costs.
Workers Compensation, Policy [Policy Text Block]	'
	Workers’ Compensation
	We purchase large risk deductible workers’ compensation policies for the majority of our workers’ compensation liabilities that are subject to various deductibles to limit our exposure. We calculate our workers’ compensation reserves on an undiscounted basis based on estimated actuarially calculated development factors. While we believe that our assumptions are appropriate, significant differences in our actual experience or significant changes in our assumptions may materially affect our workers' compensation costs.
Income Tax, Policy [Policy Text Block]	'
	Income Taxes
	We account for income taxes under the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been included in the financial statements. Under this method, deferred tax assets and liabilities are determined based on the differences between the financial statement carrying amount and tax basis of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. The effect of a change in tax rates on deferred tax assets and liabilities is recognized in income in the period that includes the enactment date.
	We record net deferred tax assets to the extent we believe these assets will more likely than not be realized. In making such determination, we consider all available positive and negative evidence, including future reversals of existing taxable temporary differences, projected future taxable income, tax planning strategies, recent financial operations and their associated valuation allowances, if any. In the event we were to determine that we would be able to realize our deferred income tax assets in the future in excess of their net recorded amount, we would make an adjustment to the valuation allowance, which would reduce the provision for income taxes.
	Certain provisions of ASC 740, “Income Taxes” provide that a tax benefit from an uncertain tax position may be recognized when it is more likely than not that the position will be sustained upon examination, including resolutions of any related appeals or litigation processes, based on the technical merits. Income tax positions must meet a more likely than not recognition threshold at the effective date to be recognized upon the adoption of these provisions and in subsequent periods. See “Note 11. Income Taxes.”
Pension and Other Postretirement Plans, Policy [Policy Text Block]	'
	Pension and Other Postretirement Benefits
	We account for pension and other postretirement benefits in accordance with ASC 715, “Compensation — Retirement Benefits”. Accordingly, we recognize the funded status of our pension plans as assets or liabilities in our consolidated balance sheets. The funded status is the difference between our projected benefit obligations and fair value of plan assets. The determination of our obligation and expense for pension and other postretirement benefits is dependent on our selection of certain assumptions used by actuaries in calculating such amounts. We describe these assumptions in “Note 12. Retirement Plans,” which include, among others, the discount rate, expected long-term rate of return on plan assets and rates of increase in compensation levels. As provided under ASC 715, we defer actual results that differ from our assumptions and amortize the difference over future periods. Therefore, these differences generally affect our recognized expense and funding requirements in future periods. While we believe that our assumptions are appropriate, significant differences in our actual experience or significant changes in our assumptions may materially affect our pension and other postretirement benefit obligations and our future expense.
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]	'
	Stock Based Compensation
	We recognize expense for stock based compensation plans based on the estimated fair value of the related awards in accordance with ASC 718, “Compensation — Stock Compensation”. Pursuant to our Amended and Restated 2004 Incentive Stock Plan (“2004 Incentive Stock Plan”), we can award shares of restricted Common Stock to employees and our board of directors. The grants generally vest over a period of 3 years depending on the nature of the award, except for non-employee director grants, which vest over one year. Our restricted stock grants to employees generally contain market or performance conditions that must be met in conjunction with a service requirement for the shares to vest. We charge compensation under the plan to earnings over each increment’s individual restriction period. See “Note 14. Share-Based Compensation” for additional information.
Asset Retirement Obligations, Policy [Policy Text Block]	'
	Asset Retirement Obligations
	The Company accounts for asset retirement obligations in accordance with ASC 410, “Asset Retirement and Environmental Obligations”. A liability and an asset are recorded equal to the present value of the estimated costs associated with the retirement of long-lived assets where a legal or contractual obligation exists and the liability can be reasonably estimated. The liability is accreted over time and the asset is depreciated over the remaining life of the related asset. Upon settlement of the liability, we will recognize a gain or loss for any difference between the settlement amount and the liability recorded. Asset retirement obligations with indeterminate settlement dates are not recorded until such time that a reasonable estimate may be made. Our asset retirement obligations consist primarily of landfill closure and post-closure costs at certain of our paperboard mills. At September 30, 2013 and September 30, 2012, liabilities of $14.9 million and $16.3 million, respectively, were accrued.
Maintenance Cost, Policy [Policy Text Block]	'
	Repair and Maintenance Costs
	We expense routine repair and maintenance costs as we incur them. We defer expenses we incur during planned major maintenance activities and recognize the expenses ratably over the shorter of the estimated interval until the next major maintenance activity, the life of the deferred item, or until the next major maintenance activity occurs. This maintenance is generally performed every twelve to twenty-four months and has a significant impact on our results of operations in the period performed primarily due to lost production during the maintenance period.
Foreign Currency Transactions and Translations Policy [Policy Text Block]	'
	Foreign Currency
	We translate the assets and liabilities of our foreign operations from their functional currency into U.S. dollars at the rate of exchange in effect as of the balance sheet date. We reflect the resulting translation adjustments in equity. We translate the revenues and expenses of our foreign operations at a daily average rate prevailing for each month during the fiscal year. We include gains or losses from foreign currency transactions, such as those resulting from the settlement of foreign receivables or payables, in the consolidated statements of income. We recorded a gain of $2.5 million in fiscal 2013, a loss of $5.5 million in fiscal 2012 and a gain of $3.9 million in 2011 from foreign currency transactions. We also recorded a foreign currency loss of approximately $13.5 million in fiscal 2011 related to a Canadian intercompany loan.
Environmental Costs, Policy [Policy Text Block]	'
	Environmental Remediation Costs
	We accrue for losses associated with our environmental remediation obligations when it is probable that we have incurred a liability and the amount of the loss can be reasonably estimated. We generally recognize accruals for estimated losses from our environmental remediation obligations no later than completion of the remedial feasibility study and adjust such accruals as further information develops or circumstances change. We recognize recoveries of our environmental remediation costs from other parties as assets when we deem their receipt probable. See “Note 16. Commitments and Contingencies.”

Description_of_Business_and_Su2

Description of Business and Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Sep. 30, 2013
Description of Business and Summary of Significant Accounting Policies [Abstract]	'
Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]	'
	The following table represents a summary of the changes in the reserve for allowance for doubtful accounts, returns and allowances and cash discounts for fiscal 2013, 2012 and 2011 (in millions):
		2013			2012			2011
	Balance at the beginning of period	$	26.9		$	30.1		$	7.8
	Reduction in sales and charges to costs and expenses (1)	126.4			107.9			78.2
	Deductions	(126.5		)	(111.1		)	(55.9		)
	Balance at the end of period	$	26.8		$	26.9		$	30.1
	(1) Includes the impact of acquisitions.
Property, Plant and Equipment, Estimated Useful Lives [Table Text Block]	'
	For financial reporting purposes, we provide depreciation and amortization primarily on a straight-line method over the estimated useful lives of the assets as follows:
	Buildings and building improvements		15-40 years
	Machinery and equipment		3-44 years
	Transportation equipment		3-8 years

Earnings_per_Share_Tables

Earnings per Share (Tables)	12 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Schedule of earnings per share, basic and diluted	'
	The following table sets forth the computation of basic and diluted earnings per share under the two-class method (in millions, except per share data):
		September 30,
		2013			2012			2011
	Basic earnings per share:
	Numerator:
	Net income attributable to Rock-Tenn Company shareholders	$	727.3		$	249.1		$	141.1
	Less: Distributed and undistributed income available to participating securities	(0.2		)	(0.8		)	(1.4		)
	Distributed and undistributed income attributable to Rock-Tenn Company shareholders	$	727.1		$	248.3		$	139.7
	Denominator:
	Basic weighted average shares outstanding	72			71.2			49.7
	Basic earnings per share attributable to Rock-Tenn Company shareholders	$	10.1		$	3.49		$	2.81
	Diluted earnings per share:
	Numerator:
	Net income attributable to Rock-Tenn Company shareholders	$	727.3		$	249.1		$	141.1
	Less: Distributed and undistributed income available to participating securities	(0.2		)	(0.7		)	(1.4		)
	Distributed and undistributed income attributable to Rock-Tenn Company shareholders	$	727.1		$	248.4		$	139.7
	Denominator:
	Basic weighted average shares outstanding	72			71.2			49.7
	Effect of dilutive stock options and non-participating securities	1.1			0.9			0.8
	Diluted weighted average shares outstanding	73.1			72.1			50.5
	Diluted earnings per share attributable to Rock-Tenn Company shareholders	$	9.95		$	3.45		$	2.77

Other_Comprehensive_Income_Los1

Other Comprehensive Income (Loss) (Tables)	12 Months Ended
	Sep. 30, 2013
Other Comprehensive Income (Loss) [Abstract]	'
Schedule of accumulated other comprehensive income (loss)	'
	The following table summarizes the changes in accumulated other comprehensive income (loss) by component for the fiscal year ended September 30, 2013 (in millions):
		Deferred Loss on Cash Flow Hedges			Defined Benefit Pension and Postretirement Plans			Foreign Currency Items			Total (1)
	Balance at September 30, 2012	$	(0.2	)	$	(547.8	)	$	47.5		$	(500.5	)
	Other comprehensive income (loss) before reclassifications	—			190.4			(15.0		)	175.4
	Amounts reclassified from accumulated other comprehensive income	—			24.5			—			24.5
	Net current period other comprehensive income (loss)	—			214.9			(15.0		)	199.9
	Balance at September 30, 2013	$	(0.2	)	$	(332.9	)	$	32.5		$	(300.6	)
	(1)     All amounts are net of tax and noncontrolling interest.
Schedule of other comprehensive income (loss)	'
	A summary of the components of other comprehensive income (loss) for the years ended September 30, 2013, 2012 and 2011, is as follows (in millions):
	Fiscal 2013	Pre-Tax			Tax			Net of Tax
		Amount						Amount
	Foreign currency translation loss	$	(15.1	)	$	—		$	(15.1	)
	Net actuarial gain arising during period	303.9			(119.8		)	184.1
	Amortization of net actuarial loss	39.3			(15.1		)	24.2
	Prior service credit arising during the period	5.2			(2.0		)	3.2
	Amortization of prior service cost	1.5			(0.6		)	0.9
	Other adjustments	—			4.2			4.2
	Consolidated other comprehensive income	334.8			(133.3		)	201.5
	Less: Other comprehensive income attributable to noncontrolling interests	(1.6		)	—			(1.6		)
	Other comprehensive income attributable to Rock-Tenn Company shareholders	$	333.2		$	(133.3	)	$	199.9
	Fiscal 2012	Pre-Tax			Tax			Net of Tax
		Amount						Amount
	Foreign currency translation gain	$	18.3		$	—		$	18.3
	Net deferred loss on cash flow hedges	(0.1		)	0.1			—
	Reclassification adjustment of net loss on cash flow hedges included in earnings	2.3			(0.9		)	1.4
	Net actuarial loss arising during period	(375.0		)	140.8			(234.2		)
	Amortization of net actuarial loss	21.4			(8.1		)	13.3
	Prior service cost arising during period	(2.2		)	0.8			(1.4		)
	Amortization of prior service cost	0.7			(0.3		)	0.4
	Consolidated other comprehensive loss	(334.6		)	132.4			(202.2		)
	Less: Other comprehensive loss attributable to noncontrolling interests	0.9			—			0.9
	Other comprehensive loss attributable to Rock-Tenn Company shareholders	$	(333.7	)	$	132.4		$	(201.3	)
	Fiscal 2011	Pre-Tax			Tax			Net of Tax
		Amount						Amount
	Foreign currency translation loss	$	(13.0	)	$	0.1		$	(12.9	)
	Net deferred loss on cash flow hedges	(0.4		)	0.1			(0.3		)
	Reclassification adjustment of net loss on cash flow hedges included in earnings	6.9			(2.9		)	4
	Net actuarial loss arising during period	(336.0		)	124.8			(211.2		)
	Amortization of net actuarial loss	18.9			(6.7		)	12.2
	Prior service credit arising during period	0.3			—			0.3
	Amortization of prior service cost	0.7			(0.3		)	0.4
	Consolidated other comprehensive loss	(322.6		)	115.1			(207.5		)
	Less: Other comprehensive loss attributable to noncontrolling interests	0.5			—			0.5
	Other comprehensive loss attributable to Rock-Tenn Company shareholders	$	(322.1	)	$	115.1		$	(207.0	)
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block]	'
	The following table summarizes the reclassifications out of accumulated other comprehensive income by component for the year ended September 30, 2013 (in millions):
		Year Ended September 30,
		2013
		Pretax			Tax			Net of Tax
	Amortization of defined benefit pension and postretirement items (1)
	Actuarial losses(2)	(38.6		)	15			(23.6		)
	Prior service costs (2)	(1.5		)	0.6			(0.9		)
	Total reclassifications for the period	$	(40.1	)	$	15.6		$	(24.5	)
	(1)	Amounts in parentheses indicate charges to earnings. Amounts pertaining to noncontrolling interests are excluded.
	(2)	These accumulated other comprehensive income components are included in the computation of net periodic pension cost. See “Note 12. Retirement Plans” for additional details.

Inventories_Tables

Inventories (Tables)	12 Months Ended
	Sep. 30, 2013
Inventories [Abstract]	'
Schedule of inventories	'
	Inventories are as follows (in millions):
		September 30,
		2013			2012
	Finished goods and work in process	$	370.9		$	325.4
	Raw materials	453.6			372.7
	Supplies and spare parts	194			197.1
	Inventories at FIFO cost	1,018.50			895.2
	LIFO reserve	(80.6		)	(33.3		)
	Net inventories	$	937.9		$	861.9

Acquisitions_Tables

Acquisitions (Tables)	12 Months Ended
	Sep. 30, 2013
Acquisitions [Abstract]	'
Purchase price allocation, opening balance	'
	The following table summarizes the estimated fair values of the assets acquired and liabilities assumed by major class of assets and liabilities as of the acquisition date, as well as adjustments made during fiscal 2012 (referred to as “measurement period adjustments”) (in millions):
		Amounts Recognized as of Acquisition Date(1)				Measurement Period Adjustments(2)			Amounts Recognized as of Acquisition Date (as adjusted)(3)
	Current assets, net of cash acquired	$	1,459.50			$	(6.8	)	$	1,452.70
	Property, plant and equipment	4,391.40				(12.1		)	4,379.30
	Goodwill	1,091.60				(10.9		)	1,080.70
	Intangible assets	691.4				21.7			713.1
	Other long-term assets	95.5				19			114.5
	Total assets acquired	7,729.40				10.9			7,740.30
	Current portion of debt	9.4				—			9.4
	Current liabilities	816.7				6.6			823.3
	Long-term debt due after one year	1,171.10				—			1,171.10
	Accrued pension and other long-term benefits	1,205.80				(4.1		)	1,201.70
	Noncontrolling interest and other long-term liabilities	787.8				8.4			796.2
	Total liabilities and noncontrolling interest assumed	3,990.80				10.9			4,001.70
	Net assets acquired	$	3,738.60			$	—		$	3,738.60
	(1)	As previously reported in the Notes to Consolidated Financial Statements included in our Fiscal 2011 Form 10-K.
	(2)	The measurement period adjustments recorded in fiscal 2012 did not have a significant impact on our condensed consolidated statements of income for any period of fiscal 2012 or 2011. In addition, these adjustments did not have a significant impact on our condensed consolidated balance sheet as of September 30, 2011. Therefore, we recorded the cumulative impact in fiscal 2012 and did not retrospectively adjust the comparative 2011 financial information presented herein.
	(3)	The measurement period adjustments were due primarily to refinements of third party appraisals related to certain property, plant and equipment and intangible assets and related estimated useful lives as well as adjustments to certain tax accounts based on among other things, adjustments to deferred tax liabilities including the recent appraisal adjustments, analysis of the tax basis of acquired assets and liabilities and other tax adjustments. The net impact of the measurement period adjustments resulted in a net decrease to goodwill.
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination	'
	The following table summarizes the weighted average life and gross carrying amount relating to intangible assets recognized in the Smurfit-Stone Acquisition, excluding goodwill (in millions, except weighted avg. life):
		Weighted Avg. Life		Gross Carrying Amount
	Customer relationships	10.5		$	663
	Favorable contracts	6.9		23.5
	Technology and patents	8		13.3
	Trademarks and tradenames	3.5		10.3
	Non-compete agreements	2		3
	Total	10.2		$	713.1
Schedule of pro forma information related to acquisition	'
	The following unaudited pro forma information reflects our consolidated results of operations as if the acquisition had taken place on October 1, 2009. The unaudited pro forma information is not necessarily indicative of the results of operations that we would have reported had the transaction actually occurred at the beginning of these periods nor is it necessarily indicative of future results. The unaudited pro forma financial information does not reflect the impact of future events that may occur after the acquisition, including, but not limited to, anticipated costs savings from synergies or other operational improvements (in millions).
		Year Ended September 30,
		2011
		(Unaudited)
	Net sales	$	9,574.50
	Net income attributable to Rock-Tenn Company shareholders	$	341.1

Restructuring_and_Other_Costs_1

Restructuring and Other Costs, Net (Tables)	12 Months Ended
	Sep. 30, 2013
Restructuring and Other Costs, Net [Abstract]	'
Schedule of restructuring and other costs, net	'
	The following table presents a summary of restructuring and other charges, net, related to active restructuring and other initiatives that we incurred during the fiscal year, the cumulative recorded amount since we announced the initiative, and the total we expect to incur (in millions):
	Segment		Period		Net Property,				Severance				Equipment			Facility		Other			Total
					Plant and				and Other				and Inventory			Carrying		Costs
					Equipment (a)				Employee				Relocation			Costs
									Related				Costs
									Costs
	Corrugated		Fiscal 2013		$	10.4			$	23.5			$	5		$	4.7	$	(0.1	)	$	43.5
	Packaging(b)
			Fiscal 2012		16.6				10.5				3.5			5.6		4.7			40.9
			Fiscal 2011		16.7				7.8				1.2			1.1		0.7			27.5
			Cumulative		44.1				42.3				9.7			11.4		5.4			112.9
			Expected Total		44.1				42.3				10.9			14.6		5.4			117.3
	Consumer Packaging(c)		Fiscal 2013		2.6				0.6				0.1			0.2		—			3.5
			Fiscal 2012		(3.4		)		0.2				0.6			0.2		—			(2.4		)
			Fiscal 2011		1				2.3				0.9			0.7		0.2			5.1
			Cumulative		3.4				3.9				1.7			1.1		0.9			11
			Expected Total		3.4				3.9				1.7			1.1		0.9			11
	Recycling(d)		Fiscal 2013		5.5				1.2				0.2			0.8		2.6			10.3
			Fiscal 2012		1.6				0.3				—			0.1		0.3			2.3
			Fiscal 2011		—				—				—			0.1		—			0.1
			Cumulative		7.2				1.5				0.2			1.2		2.9			13
			Expected Total		7.2				1.5				0.5			2		3			14.2
	Other(e)		Fiscal 2013		0.1				0.2				0.1			—		20.3			20.7
			Fiscal 2012		—				—				—			—		34.4			34.4
			Fiscal 2011		—				—				—			—		60.6			60.6
			Cumulative		0.1				0.2				0.1			—		115.3			115.7
			Expected Total		0.1				0.2				0.1			—		115.3			115.7
	Total		Fiscal 2013		$	18.6			$	25.5			$	5.4		$	5.7	$	22.8		$	78
			Fiscal 2012		$	14.8			$	11			$	4.1		$	5.9	$	39.4		$	75.2
			Fiscal 2011		$	17.7			$	10.1			$	2.1		$	1.9	$	61.5		$	93.3
			Cumulative		$	54.8			$	47.9			$	11.7		$	13.7	$	124.5		$	252.6
			Expected Total		$	54.8			$	47.9			$	13.2		$	17.7	$	124.6		$	258.2
	(a)	“Net property, plant and equipment” as used in this Note 6 is the sum of property, plant and equipment impairment losses, subsequent adjustments to fair value for assets classified as held for sale, subsequent (gains) or losses on sales of property, plant and equipment, related parts and supplies, and accelerated depreciation on such assets.
	(b)	The Corrugated Packaging segment current year charges are primarily associated with the closure of seven corrugated container plants acquired in the Smurfit-Stone Acquisition, on-going closure costs at previously closed facilities including the Matane, Quebec containerboard mill also acquired in the Smurfit-Stone Acquisition which were partially offset by gains on sale of previously closed facilities. The Corrugated Packaging segment charges in fiscal 2012 primarily reflect the closure of our Matane, Quebec containerboard mill, a machine taken out of operation at our Hodge, LA containerboard mill and seven corrugated container plants, all acquired in the Smurfit-Stone Acquisition and charges associated primarily with on-going closure costs at previously closed corrugated container plants acquired in the Smurfit-Stone Acquisition and our legacy Hauppauge, NY sheet plant, net of a gain on sale in fiscal 2012 primarily for our Santa Fe Springs, CA corrugated converting facility. The Corrugated Packaging Segment charges in fiscal 2011 primarily reflect the closure of six corrugated container plants also acquired in the Smurfit-Stone Acquisition. The fiscal 2012 expenses in the “Other Costs” column primarily represent repayment of energy credits and site environmental closure activities at the Matane mill. The cumulative charges primarily reflect charges associated with the closure of twenty corrugated container plants acquired in the Smurfit-Stone Acquisition, the closure of the Matane, Quebec containerboard mill, charges related to kraft paper assets at our Hodge containerboard mill we acquired in the Smurfit-Stone Acquisition, and gains and losses associated with the sale of closed facilities. We have transferred a substantial portion of each closed facility's production to our other facilities.
	(c)	The Consumer Packaging segment current year charges are primarily associated with the closure of a converting facility and on-going closure costs for previously closed facilities. The Consumer Packaging segment charges in fiscal 2012 primarily reflect the gain on sale of our Columbus, IN laminated paperboard converting operation and Milwaukee, WI folding carton facility and on-going closure costs associated with previously closed facilities. The Consumer Packaging segment charges in fiscal 2011 primarily reflect the closure of two facilities and on-going closure costs for previously closed facilities. The cumulative charges primarily reflect the actions mentioned above as well as closure costs at certain of five interior packaging plants. We have transferred a substantial portion of each closed facility's production to our other facilities.
	(d)	The Recycling segment current year charges are primarily associated with the closure of nine collection facilities acquired in the Smurfit-Stone Acquisition partially offset by the gain on sale of our Dallas, TX collection facility. The Recycling segment charges in fiscal 2012 primarily reflect the closure of six collection facilities also acquired in the Smurfit-Stone Acquisition and the cumulative charges reflect the preceding actions as well as carrying costs for two collections facilities shutdown in a prior year.
	(e)	The expenses in the “Other” segment primarily reflect costs that we consider as Corporate, including the “Other Costs” column which primarily reflects costs incurred as a result of our Smurfit-Stone Acquisition, including merger integration expenses. Also included in the “Other” segment are insignificant costs related to our Merchandising Displays segment. The pre-tax charges are summarized below (in millions):
		Acquisition				Integration				Other Expense (Income)				Total
		Expense / (Income)				Expenses
	Fiscal 2013	$	(3.6	)		$	23.9			$	0.4			$	20.7
	Fiscal 2012	2.9				32.1				(0.6		)		34.4
	Fiscal 2011	20.2				40.4				—				60.6
	Acquisition expenses include expenses associated with acquisitions, whether consummated or not, as well as litigation expenses associated with the Smurfit-Stone Acquisition, net of recoveries. Acquisition expenses primarily consist of advisory, legal, accounting, valuation and other professional or consulting fees. Integration expenses reflect primarily severance and other employee costs, professional services including work being performed to facilitate the Smurfit-Stone integration including information systems integration costs, lease expense and other costs. Due to the complexity and duration of the integration activities the precise amount expected to be incurred has not been quantified above. We expect integration activities to continue into fiscal 2014.
Schedule of Restructuring and Other Costs Reserve By Type of Cost Text Block [Table Text Block]	'
	The following tables represent a summary of and the changes in the restructuring accrual, which is primarily composed of lease commitments, accrued severance and other employee costs, as well as a reconciliation of the restructuring accrual to the line item “Restructuring and other costs, net” on our consolidated statements of income for fiscal 2013, 2012 and 2011 (in millions):
		2013				2012				2011
	Accrual at beginning of fiscal year	$	22.7			$	26.7			$	1.4
	Accruals acquired in Smurfit-Stone Acquisition	—				—				9.2
	Additional accruals	18.7				26.9				30.8
	Payments	(20.6		)		(28.0		)		(14.4		)
	Adjustment to accruals	1				(2.9		)		(0.3		)
	Accrual at September 30,	$	21.8			$	22.7			$	26.7
	Reconciliation of accruals and charges to restructuring and other costs, net:
		2013				2012				2011
	Additional accruals and adjustments to accruals (see table above)	$	19.7			$	24			$	30.5
	Acquisition (income) expense	(3.6		)		2.9				20.2
	Integration expenses	22.8				23				20.2
	Net property, plant and equipment	18.6				14.8				17.7
	Severance and other employee costs	10.1				0.6				0.3
	Equipment relocation	5.4				4.1				2.1
	Facility carrying costs	5.7				5.9				1.9
	Other	(0.7		)		(0.1		)		0.4
	Total restructuring and other costs, net	$	78			$	75.2			$	93.3
Schedule of Restructuring Costs Included in Other Costs [Table Text Block]	'
	The expenses in the “Other” segment primarily reflect costs that we consider as Corporate, including the “Other Costs” column which primarily reflects costs incurred as a result of our Smurfit-Stone Acquisition, including merger integration expenses. Also included in the “Other” segment are insignificant costs related to our Merchandising Displays segment. The pre-tax charges are summarized below (in millions):
		Acquisition				Integration				Other Expense (Income)				Total
		Expense / (Income)				Expenses
	Fiscal 2013	$	(3.6	)		$	23.9			$	0.4			$	20.7
	Fiscal 2012	2.9				32.1				(0.6		)		34.4
	Fiscal 2011	20.2				40.4				—				60.6

Other_Intangible_Assets_Tables

Other Intangible Assets (Tables)	12 Months Ended
	Sep. 30, 2013
Other Intangible Assets [Abstract]	'
Schedule of gross carrying amount and accumulated amortization relating to intangible assets excluding goodwill	'
	The gross carrying amount and accumulated amortization relating to intangible assets, excluding goodwill, is as follows (in millions, except weighted avg. life):
				September 30,
				2013					2012
		Weighted		Gross  Carrying		Accumulated			Gross  Carrying		Accumulated
		Avg. Life		Amount		Amortization			Amount		Amortization
	Customer relationships	11.8		$	876.5	$	(230.4	)	$	873.9	$	(153.6	)
	Favorable contracts	11.8		23.9		(14.3		)	42.2		(18.8		)
	Technology and patents	8		14.3		(4.8		)	14.3		(3.2		)
	Trademarks and tradenames	33.9		30.2		(9.8		)	30.3		(6.4		)
	Non-compete agreements	N/A		—		—			5.1		(4.1		)
	License costs	10		15.9		(2.1		)	15.9		(0.5		)
	Total	12.4		$	960.8	$	(261.4	)	$	981.7	$	(186.6	)
Estimated intangible asset future amortization expense	'
	Estimated intangible asset amortization expense for the succeeding five fiscal years is as follows (in millions):
	Fiscal 2014	$	85.4
	Fiscal 2015	81.5
	Fiscal 2016	80.9
	Fiscal 2017	80.7
	Fiscal 2018	80.6

Debt_Tables

Debt (Tables)	12 Months Ended
	Sep. 30, 2013
Debt [Abstract]	'
Components of debt	'
	The following were individual components of debt (in millions):
		September 30,
		2013				2012
	5.625% notes due March 2013(a)	$	—			$	80.6
	4.45% notes due March 2019(b)	349.7				349.7
	3.50% notes due March 2020(c)	347.5				347.1
	4.90% notes due March 2022(b)	399.4				399.3
	4.00% notes due March 2023(c)	346.6				346.3
	Term loan facility (d)	947.5				1,222.60
	Revolving credit and swing facilities(d)	184.3				242.3
	Receivables-backed financing facility(e)	260				410
	Other debt	9.8				14.6
	Total debt	2,844.80				3,412.50
	Less current portion of debt	2.9				261.3
	Long-term debt due after one year	$	2,841.90			$	3,151.20
	A portion of the debt classified as long-term, which includes the term loan, receivables-backed, revolving credit and swing facilities, may be paid down earlier than scheduled at our discretion without penalty. During fiscal 2013, 2012 and 2011, amortization of debt issuance costs charged to interest expense was $10.2 million, $10.8 million and $7.7 million, respectively.
	(a)	In March 2003, we sold $100.0 million in aggregate principal amount of our 5.625% notes due March 2013 (“March 2013 Notes”). We incurred debt issuance costs of approximately $0.8 million which were amortized over the term of the notes. In the first quarter of fiscal 2010, we repurchased $19.5 million of our March 2013 Notes at an average price of approximately 98% of par and recorded an aggregate gain on extinguishment of debt of approximately $0.5 million. On March 15, 2013, we repaid our remaining March 2013 Notes upon maturity.
	(b)	On February 22, 2012, we issued $350.0 million aggregate principal amount of 4.45% senior notes due March 2019 (“March 2019 Notes”) and issued $400.0 million aggregate principal amount of 4.90% senior notes due March 2022 (“March 2022 Notes”) in an unregistered offering pursuant to Rule 144A and Regulation S under the Securities Act. We issued the March 2019 Notes and March 2022 Notes at a discount of approximately $0.3 million and $0.8 million, respectively, and recorded debt issuance costs, including the exchange offer, of approximately $3.0 million and $3.5 million respectively, which are being amortized over the respective term of the notes. Giving effect to the amortization of the original issue discount and the debt issuance costs, the effective interest rates of the March 2019 Notes and March 2022 Notes are approximately 4.59% and 5.01%, respectively.
	(c)	On September 11, 2012, we issued $350.0 million aggregate principal amount of 3.50% senior notes due March 2020 (“March 2020 Notes”) and issued $350.0 million aggregate principal amount of 4.00% senior notes due March 2023 (“March 2023 Notes”) in an unregistered offering pursuant to Rule 144A and Regulation S under the Securities Act. We issued the March 2020 and March 2023 notes at a discount of approximately $3.0 million and $3.7 million, respectively, and recorded debt issuance costs, including the exchange offer, of approximately $2.9 million and $3.0 million, respectively, which are being amortized over the respective term of the notes. Giving effect to the amortization of the original issue discount and the debt issuance costs, the effective interest rates of the March 2020 and March 2023 Notes are approximately 3.72% and 4.18%, respectively.
	(d)	On September 27, 2012, we entered into an unsecured Amended and Restated Credit Agreement with an original maximum principal amount of approximately $2.7 billion before scheduled payments. The Credit Facility includes a $1.475 billion, 5-year revolving credit facility and a $1.223 billion, 5-year term loan facility. All obligations under the Credit Facility are fully and unconditionally guaranteed by our existing and future wholly-owned U.S. subsidiaries, except for certain present and future unrestricted subsidiaries and certain other limited exceptions. In addition, the obligations of Rock-Tenn Company of Canada, Inc. are guaranteed by Rock-Tenn Company and all such wholly-owned U.S. subsidiaries, as well as by wholly-owned Canadian subsidiaries of RockTenn, other than certain present and future unrestricted subsidiaries and certain other limited exceptions.
	In December 2012, in connection with the amendment of our receivables-backed financing facility, we prepaid our term loan facility through December 2014 with borrowings under our Receivables Facility, our revolving credit facility and available cash. Effective May 3, 2013, we exercised the Leverage Reduction Option which reduced our maximum permitted Leverage Ratio to 3.5 times and decreased our Applicable Percentage 25 basis points (each as defined in the Credit Facility). On June 7, 2013, we amended the Credit Facility to, among other things, modified the EBITDA definition, including but not limited to, allowing for add backs associated with proactive pension actions, synergies associated with future acquisitions and certain business interruptions covered by third parties and permitted a future $200 million Mexican peso sub-facility with dollar for dollar reduction to existing commitments if activated.
	Up to $250.0 million under the revolving credit facility may be used for the issuance of letters of credit. In addition, up to $350.0 million of the revolving credit facility may be used to fund borrowings in Canadian dollars. At September 30, 2013 and September 30, 2012, the amount committed under the credit facilities for loans to a Canadian subsidiary was $300.0 million and $300.0 million, respectively. At September 30, 2013, available borrowings under the revolving credit portion of the Credit Facility, reduced by certain outstanding letters of credit not drawn upon of approximately $48.6 million and the application of our maximum leverage ratio subject to the facility limit, exceeded $1.2 billion.
	At our option, borrowings under the Credit Facility bear interest at either a base rate or at the London Interbank Offered Rate (“LIBOR”), plus, in each case, an applicable margin. In addition, advances in Canadian dollars may be made by way of purchases of bankers' acceptances. We are required to pay fees in respect of outstanding letters of credit at a rate equal to the applicable margin for LIBOR-based borrowings based upon a Credit Agreement Leverage Ratio. The following table summarizes the applicable margins and percentages related to the revolving credit facility and term loan of the Credit Facility:
		Range		September 30,
				2013
	Applicable margin/percentage for determining:
	LIBOR-based loans and banker's acceptance advances interest rate (1)	1.125%-1.750%		1.25	%
	Base rate-based borrowings (1)	0.125%-0.750%		0.25	%
	Facility commitment (2)	0.175%-0.300%		0.2	%
	(1)	The rates vary based on our Leverage Ratio, as defined in the Amended and Restated Credit Agreement.
	(2)	Applied to the aggregate borrowing availability based on the Leverage Ratio, as defined below.
	Following the submission of our September 30, 2013 quarterly officer's compliance certificate when our Form 10-K is filed, our applicable margins in the table above will fall for each measure to the low end of the range. The variable interest rate, including the applicable margin, on our term loan facility was 1.43% at September 30, 2013. Interest rates on our revolving credit facility for borrowings both in the U.S. and Canada ranged from 2.55% to 3.50% at September 30, 2013.
	The Credit Facility contains certain prepayment requirements and customary affirmative and negative covenants. The negative covenants include covenants that, subject to certain exceptions, contain: limitations on liens and further negative pledges; limitations on sale-leaseback transactions; limitations on debt and prepayments, redemptions or repurchases of certain debt and equity; limitations on mergers and asset sales; limitations on sales, transfers and other dispositions of assets; limitations on loans and certain other investments; limitations on restrictions affecting subsidiaries; limitations on transactions with affiliates; limitations on changes to accounting policies or fiscal periods; limitations on speculative hedge transactions; and restrictions on modification or waiver of material documents in a manner materially adverse to the lenders.
	In addition, the Credit Facility includes financial covenants requiring that we maintain a maximum total leverage ratio and minimum interest coverage ratio. The terms of the Credit Facility, prior to us exercising the Leverage Reduction Option on May 3, 2013 which reduced our maximum permitted Leverage Ratio to 3.5 times, required us to maintain a leverage ratio (which is the ratio of our total funded debt less certain amounts of unrestricted cash, to Credit Agreement EBITDA, as defined, for the preceding four fiscal quarters “Leverage Ratio”) of not greater than 3.75 to 1.00 for fiscal quarters ending from September 30, 2012 through September 30, 2013, and not greater than 3.50 to 1.00 for fiscal quarters ending thereafter. In addition, we must maintain an interest coverage ratio (which is the ratio of Credit Agreement EBITDA for the preceding four fiscal quarters to cash interest expense for such period) of not less than 3.50 to 1.00 for any fiscal quarters ending on or after September 30, 2012. Credit Agreement EBITDA is calculated in accordance with the definition contained in our Amended and Restated Credit Agreement. Credit Agreement EBITDA is generally defined as consolidated net income of RockTenn for any fiscal period plus the following to the extent such amounts are deducted in determining such consolidated net income: (i) consolidated interest expense, (ii) consolidated tax expenses, (iii) depreciation and amortization expenses, (iv) financing expenses and write-offs, including remaining portions of original issue discount on prepayment of indebtedness, prepayment premiums and commitment fees, (v) inventory expenses associated with the write up of Smurfit-Stone inventory acquired in the merger and other permitted acquisitions, (vi) all other non-cash charges, (vii) all legal, accounting and professional advisory expenses incurred in respect of the Smurfit-Stone Acquisition and other permitted acquisitions and related financing transactions, (vii) certain expenses and costs incurred in connection with the Smurfit-Stone Acquisition and associated synergies, restructuring charges, and certain other charges and expenses, subject to certain limitations specified in the Credit Facility, (viii) certain other charges and expenses unrelated to the Smurfit-Stone Acquisition subject to certain specified limitations in the Credit Facility, and (ix) for certain periods, run-rate synergies expected to be achieved due to the Smurfit-Stone Acquisition not already included in EBITDA and adjustments to include Smurfit-Stone EBITDA as outlined in the Amended and Restated Credit Agreement related to periods prior to the acquisition (“Credit Agreement EBITDA”). We test and report our compliance with these covenants each quarter. We are in compliance with all of our covenants.
	The credit facilities also contain certain customary events of default, including relating to non-payment, breach of representations, warranties or covenants, default on other material debt, bankruptcy and insolvency events, invalidity or impairment of loan documentation, collateral or subordination provisions, change of control and customary ERISA defaults. The term “ERISA” means the Employee Retirement Income Security Act of 1974, as amended, and the rules and regulations thereunder.
	(e)	On December 21, 2012, we amended and increased the Receivables Facility from $625.0 million to $700.0 million, extended the maturity date from the third anniversary of the May 27, 2011 Smurfit-Stone Acquisition to December 18, 2015, and amended, among other things, certain restrictions on what constitutes eligible receivables under the facility and lowered borrowing costs. Except for $51.0 million classified as short-term at September 30, 2012 that was expected to require the use of current assets for repayment, the borrowings are classified as long-term at September 30, 2013 and September 30, 2012. On August 30, 2013, we amended our Receivables Facility to allow for the exclusion of eligible receivables of specific obligors each calendar year subject to the following restrictions: (i) the aggregate of excluded receivables may not exceed 7.5% of eligible receivables under the Receivables Facility, and (ii) the excluded receivables of each obligor may not exceed 2.5% of the aggregate outstanding balance. The borrowing rate, which consists of a blend of the market rate for asset-backed commercial paper and the one month LIBOR rate plus a utilization fee, was 0.95% and 1.34% as of September 30, 2013 and September 30, 2012, respectively. The commitment fee for this facility was 0.25% and 0.30% as of September 30, 2013 and September 30, 2012, respectively. Borrowing availability under this facility is based on the eligible underlying accounts receivable and certain covenants. The agreement governing the Receivables Facility contains restrictions, including, among others, on the creation of certain liens on the underlying collateral. We test and report our compliance with these covenants monthly. We are in compliance with all of our covenants. At September 30, 2013 and September 30, 2012, maximum available borrowings, excluding amounts outstanding, under this facility were approximately $700.0 million and $464.0 million, respectively. The carrying amount of accounts receivable collateralizing the maximum available borrowings at September 30, 2013 was approximately $942.5 million. We have continuing involvement with the underlying receivables as we provide credit and collections services pursuant to the securitization agreement.
Schedule of aggregate maturities of debt	'
	As of September 30, 2013, the aggregate maturities of debt for the succeeding five fiscal years and thereafter are as follows (in millions):
	Fiscal 2014	$	2.9
	Fiscal 2015	91.8
	Fiscal 2016	382.3
	Fiscal 2017	917.9
	Fiscal 2018	—
	Thereafter	1,456.70
	Unamortized bond discount	(6.8		)
	Total debt	$	2,844.80

Fair_Value_Tables

Fair Value (Tables)	12 Months Ended
	Sep. 30, 2013
Fair Value [Abstract]	'
Summary of carrying amount and estimated fair value of long-term debt	'
	The following table summarizes the carrying amount and estimated fair value of our long-term debt (in millions):
		September 30, 2013				September 30, 2012
		Carrying Amount		Fair		Carrying Amount		Fair
				Value				Value
	March 2013 Notes(1)	$	—	$	—	$	80.6	$	81.7
	March 2019 Notes(1)	349.7		371.9		349.7		376.6
	March 2020 Notes(1)	347.5		343		347.1		356.3
	March 2022 Notes(1)	399.4		413.7		399.3		434
	March 2023 Notes(1)	346.6		338.6		346.3		357.7
	Term loan facilities(2)	947.5		947.5		1,222.60		1,222.60
	Revolving credit and swing facilities(2)	184.3		184.3		242.3		242.3
	Receivables-backed financing facility(2)	260		260		410		410
	Other long-term debt(2)(3)	9.8		10.1		14.6		15.4
	Total debt	$	2,844.80	$	2,869.10	$	3,412.50	$	3,496.60
	-1	Fair value is categorized as level 2 within the fair value hierarchy since the notes trade infrequently. Fair value is based on quoted market prices.
	-2	Fair value approximates the carrying amount as the variable interest rates reprice frequently at observable current market rates. As such, fair value is categorized as level 2 within the fair value hierarchy.
	-3	Fair value for certain debt is estimated based on the discounted value of future cash flows using observable current market interest rates offered for debt of similar credit risk and maturity. As such, fair value is categorized as level 2 within the fair value hierarchy.

Leases_Tables

Leases (Tables)	12 Months Ended
	Sep. 30, 2013
Leases [Abstract]	'
Schedule of future minimum rental payments for operating leases	'
	As of September 30, 2013, future minimum lease payments under all noncancelable leases for the succeeding five fiscal years and thereafter are as follows (in millions):
	Fiscal 2014	$	51
	Fiscal 2015	44.3
	Fiscal 2016	35.5
	Fiscal 2017	28.3
	Fiscal 2018	23.6
	Thereafter	72.9
	Total future minimum lease payments	$	255.6

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Sep. 30, 2013
Income Taxes [Abstract]	'
Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]	'
	The components of income before income taxes are as follows (in millions):
		Year Ended September 30,
		2013				2012				2011
	United States	$	636.5			$	374.7			$	163.7
	Foreign	74.2				14.4				51.8
	Income before income taxes	$	710.7			$	389.1			$	215.5
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	'
	The (benefit) provision for income taxes consists of the following components (in millions):
		Year Ended September 30,
		2013				2012				2011
	Current income taxes:
	Federal	$	(8.3	)		$	(4.5	)		$	(0.4	)
	State	23.7				7.5				0.5
	Foreign	7.1				10.5				9.4
	Total current	22.5				13.5				9.5
	Deferred income taxes:
	Federal	(44.6		)		129.1				55.5
	State	2.6				(0.6		)		1.5
	Foreign	(2.3		)		(5.1		)		3
	Total deferred	(44.3		)		123.4				60
	(Benefit) provision for income taxes	$	(21.8	)		$	136.9			$	69.5
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	'
	The differences between the statutory federal income tax rate and our effective income tax rate are as follows:
		Year Ended September 30,
		2013			2012			2011
	Statutory federal tax rate	35	%		35	%		35	%
	Foreign rate differential	(1.9	)		0.2			(2.5	)
	Adjustment and resolution of federal, state and foreign tax uncertainties	(35.9	)		(0.1	)		0.3
	State taxes, net of federal benefit	3.3			3.4			2.3
	Research and development and other tax credits, net of valuation allowances	(1.4	)		(0.5	)		(1.1	)
	Income attributable to noncontrolling interest	(0.2	)		(0.1	)		(0.3	)
	Nondeductible deal fees	—			—			1.3
	Change in valuation allowance	(0.7	)		(1.3	)		—
	Other, net	(1.3	)		(1.4	)		(2.7	)
	Effective (benefit) tax rate	(3.1	)%		35.2	%		32.3	%
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	'
	The tax effects of temporary differences that give rise to deferred income tax assets and liabilities consist of the following (in millions):
		September 30,
		2013				2012
	Deferred income tax assets:
	Accruals and allowances	$	23.5			$	25.2
	Employee related accruals and allowances	104.8				107.5
	Pension obligations	333.3				489
	State net operating loss carryforwards	68.3				44.2
	State credit carryforwards, net of federal benefit	49.1				47
	Cellulosic Biofuel Producers Credits and other federal tax credit carryforwards	233.6				225.6
	Federal net operating loss carryforwards	207				146.4
	Restricted stock and options	30.5				22.4
	Other	28.8				21.9
	Valuation allowances	(36.2		)		(42.3		)
	Total	1,042.70				1,086.90
	Deferred income tax liabilities:
	Property, plant and equipment	1,477.20				1,439.00
	Deductible intangibles and goodwill	287				283.8
	Inventory reserves	80.5				80.2
	Deferred gain	31				31
	Other	0.5				0.7
	Total	1,876.20				1,834.70
	Net deferred income tax liability	$	833.5			$	747.8
Location of Deferred Taxes in Balance Sheet [Table Text Block]	'
	Deferred taxes are recorded as follows in the consolidated balance sheet (in millions):
		September 30,
		2013				2012
	Current deferred tax asset	$	209.1			$	104
	Current deferred tax liability	—				0.1
	Long-term deferred tax asset	20.5				37.1
	Long-term deferred tax liability	1,063.10				888.8
	Net deferred income tax liability	$	833.5			$	747.8
Summary of Valuation Allowance [Table Text Block]	'
	The following table represents a summary of the valuation allowances against deferred tax assets for fiscal 2013, 2012 and 2011 (in millions):
		2013				2012				2011
	Balance at the beginning of period	$	42.3			$	48			$	40.2
	Charges to costs and expenses	3.6				4.3				5.8
	Allowances related to acquisitions(1)	—				—				7.8
	Deductions	(9.7		)		(10.0		)		(5.8		)
	Balance at the end of period	$	36.2			$	42.3			$	48
	-1	Allowances related to acquisitions in fiscal 2011 are related to the Smurfit-Stone Acquisition.
Summary of Income Tax Contingencies [Table Text Block]	'
	A reconciliation of the beginning and ending amount of gross unrecognized tax benefits is as follows (in millions):
		2013				2012				2011
	Balance at the beginning of period	$	289.7			$	287.9			$	12.2
	(Reductions) additions related to acquisitions(1)	—				(1.4		)		275.5
	Additions for tax positions taken in current year	2.6				7				—
	(Reductions) additions for tax positions taken in prior years	(268.5		)		—				1.5
	Reductions due to settlements	(0.2		)		—				—
	Reductions as a result of a lapse of the applicable statute of limitations	(2.3		)		(3.8		)		(1.3		)
	Balance at the end of period	$	21.3			$	289.7			$	287.9
	-1	Adjustments related to acquisitions in fiscal 2012 and 2011 are related to the Smurfit-Stone Acquisition.

Retirement_Plans_Tables

Retirement Plans (Tables)	12 Months Ended
	Sep. 30, 2013
Retirement Plans [Abstract]	'
Schedule of Target Allocation by Plan Assets [Table Text Block]	'
	Target Allocations
		U.S. Plans						Canadian Plans
		2013			2012			2013			2012
	Equity investments	40	%		40	%		29	%		29	%
	Fixed income investments	45	%		45	%		58	%		58	%
	Short-term investments	1	%		2	%		1	%		1	%
	Other investments	14	%		13	%		12	%		12	%
Schedule of Allocation of Plan Assets [Table Text Block]	'
	Our actual pension plans' asset allocations by asset category at September 30 were as follows:
		U.S. Plans						Canadian Plans
		2013			2012			2013			2012
	Equity investments	42	%		42	%		31	%		31	%
	Fixed income investments	44	%		45	%		57	%		58	%
	Short-term investments	4	%		3	%		2	%		2	%
	Other investments	10	%		10	%		10	%		9	%
	Total	100	%		100	%		100	%		100	%
Schedule of Weighted-Average Assumptions Used [Table Text Block]	'
	Weighted-average assumptions used in the calculation of benefit plan expense for fiscal years ended:
		Pension Plans						Postretirement Plans
		2013		2012		2011		2013		2012		2011
	Discount rate – U.S. Plans	4.22%		5.27%		5.50%		4.22%		5.27%		5.56	%
	Rate of compensation increase – U.S Plans	2.00 - 2.50%		2.75 - 3.32%		3.11%		N/A		N/A		N/A
	Expected long-term rate of return on plan assets – U.S. Plans	7.50%		8.00%		7.86%		N/A		N/A		N/A
	Discount rate – Canadian Plans	4.14%		3.51 - 4.90%		5.13%		4.14%		4.90%		5.13	%
	Rate of compensation increase – Canadian Plans	3.00 - 3.25%		3.00 - 3.25%		3.75%		3.00%		3.00%		3.75	%
	Expected long-term rate of return on plan assets – Canadian Plans	6.88%		3.51 - 6.00%		6.00%		N/A		N/A		N/A
	Discount rate – SERP and Other Executive Plans	2.57 - 4.22%		0.87 - 4.61%		0.24 - 5.09%		N/A		N/A		N/A
	Rate of compensation increase SERP and Other Executive Plans	6.00%		6.00%		6.00%		N/A		N/A		N/A
	The assumptions used to measure the benefit plan obligations at September 30 were:
		Pension Plans				Postretirement plans
		2013		2012		2013		2012
	Discount rate – U.S. Plans	5.19%		4.22%		5.19%		4.22%
	Rate of compensation increase – U.S. Plans	2.00 - 2.50%		2.00 - 2.50%		N/A		N/A
	Discount rate – Canadian Plans	4.56%		4.14%		4.56%		4.14%
	Rate of compensation increase – Canadian Plans	3.00 - 3.25%		3.00 - 3.25%		3.00%		3.00%
	Discount rate – SERP and Other Executive Plans	3.39 - 5.19%		2.57 - 4.22%		N/A		N/A
	Rate of compensation increase – SERP and Other Executive Plans	3.00%		6.00%		N/A		N/A
Schedule of Accumulated and Projected Benefit Obligations [Table Text Block]	'
	The pre-tax amounts in accumulated other comprehensive loss at September 30 not yet recognized as components of net periodic pension cost consist of (in millions):
		Pension Plans								Postretirement Plans
		2013				2012				2013				2012
	Net actuarial loss (gain)	$	551.2			$	877			$	(17.9	)		$	(0.1	)
	Prior service cost (credit)	7.8				5				(10.9		)		(1.8		)
	Total accumulated other comprehensive loss (income)	$	559			$	882			$	(28.8	)		$	(1.9	)
Schedule of Changes in Benefit Obligations [Table Text Block]	'
	Changes in benefit obligation for the years ended September 30 (in millions):
		Pension Plans								Postretirement Plans
		2013				2012				2013				2012
	Benefit obligation at beginning of year	$	4,973.50			$	4,363.50			$	166.2			$	167.5
	Service cost	35.1				30.1				1.6				1.5
	Interest cost	199.7				221.4				6.5				7.8
	Amendments	4.1				2.6				(9.3		)		(0.2		)
	Actuarial (gain) loss	(380.3		)		555.3				(17.9		)		(2.5		)
	Plan participant contributions	2.8				3				5.4				5.9
	Benefits paid	(260.4		)		(263.5		)		(17.3		)		(17.4		)
	Business combinations	—				(4.2		)		—				—
	Curtailments	(0.8		)		—				(2.7		)		—
	Settlements	(1.1		)		—				—				—
	Foreign currency rate changes	(48.4		)		65.3				(2.3		)		3.6
	Benefit obligation at end of year	$	4,524.20			$	4,973.50			$	130.2			$	166.2
Schedule of Changes in Fair Value of Plan Assets [Table Text Block]	'
	Changes in plan assets for the years ended September 30 (in millions):
		Pension Plans								Postretirement Plans
		2013				2012				2013				2012
	Fair value of plan assets at beginning of year	$	3,480.20			$	2,919.40			$	—			$	—
	Actual gain on plan assets	152.6				400.6				—				—
	Employer contributions	188.9				367.5				11.9				11.5
	Plan participant contributions	2.8				3				5.4				5.9
	Benefits paid	(260.4		)		(263.5		)		(17.3		)		(17.4		)
	Settlements	(1.1		)		—				—				—
	Foreign currency rate changes	(40.3		)		53.2				—				—
	Fair value of assets at end of year	$	3,522.70			$	3,480.20			$	—			$	—
Schedule of Amounts Recognized in Balance Sheet [Table Text Block]	'
	The table below sets forth the underfunded status recognized in the consolidated balance sheets at September 30 (in millions):
		Pension Plans								Postretirement Plans
		2013				2012				2013				2012
	Other current liability	$	(26.3	)		$	(0.2	)		$	(11.9	)		$	(12.0	)
	Accrued pension and other long-term benefits	(975.2		)		(1,493.1		)		(118.3		)		(154.2		)
	Net amount recognized	$	(1,001.5	)		$	(1,493.3	)		$	(130.2	)		$	(166.2	)
Schedule of Amounts in Accumulated Other Comprehensive Income (Loss) to be Recognized over Next Fiscal Year [Table Text Block]	'
	The estimated losses that will be amortized from accumulated other comprehensive loss into net periodic benefit cost in fiscal 2014 are as follows (in millions):
		Pension Plans				Postretirement Plans
	Actuarial loss (gain)	$	17.1			$	(0.7	)
	Prior service cost (credit)	1.3				(1.4		)
		$	18.4			$	(2.1	)
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]	'
	The pre-tax amounts recognized in other comprehensive (income) loss are as follows at September 30 (in millions):
		Pension Plans												Postretirement Plans
		2013				2012				2011				2013			2012			2011
	Net actuarial (gain) loss arising during period	$	(286.6	)		$	377.6			$	334			$	(17.3	)	$	(2.5	)	$	2
	Amortization of net actuarial loss	(39.3		)		(21.4		)		(18.9		)		—			—			—
	Prior service cost (credit) arising during period	4.1				2.6				0.7				(9.3		)	(0.5		)	(1.0		)
	Amortization of prior service (cost) credit	(1.2		)		(0.8		)		(0.7		)		(0.3		)	0.1			—
	Net other comprehensive (income) loss recognized	$	(323.0	)		$	358			$	315.1			$	(26.9	)	$	(2.9	)	$	1
Schedule of Net Benefit Costs [Table Text Block]	'
	The net periodic pension cost recognized in the consolidated statements of income is comprised of the following for fiscal years ended (in millions):
		Pension Plans												Postretirement Plans
		2013				2012				2011				2013			2012			2011
	Service cost	$	35.1			$	30.1			$	17.2			$	1.6		$	1.5		$	0.6
	Interest cost	199.7				221.4				95.1				6.5			7.8			3.2
	Expected return on plan assets	(247.3		)		(222.1		)		(91.9		)		—			—			—
	Amortization of net actuarial loss	38.9				21.4				18.9				—			—			—
	Amortization of prior service cost (credit)	1.2				0.8				0.7				0.3			(0.1		)	—
	Curtailment gain	—				—				—				(2.7		)	—			—
	Settlement loss	0.4				—				—				—			—			—
	Company defined benefit plan expense	28				51.6				40				5.7			9.2			3.8
	Multiemployer and other plans	20.3				9.8				4.6				—			—			—
	Net pension cost	$	48.3			$	61.4			$	44.6			$	5.7		$	9.2		$	3.8
Schedule of Health Care Cost Trend Rates [Table Text Block]	'
	The assumed health care cost trend rates used in measuring the accumulated postretirement benefit obligation (“APBO”) are as follows at September 30:
			2013
	U.S. Plans
	Health care cost trend rate assumed for next year		9.13	%
	Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)		5	%
	Year the rate reaches the ultimate trend rate		2030
	Canadian Plans
	Health care cost trend rate assumed for next year		7.3	%
	Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)		4.8	%
	Year the rate reaches the ultimate trend rate		2029
Schedule of Expected Benefit Payments [Table Text Block]	'
	Our projected estimated benefit payments (unaudited), which reflect expected future service, as appropriate, are as follows (in millions):
		Pension Plans				Postretirement Plans
	Fiscal 2014	$	296.7			$	11.9
	Fiscal 2015	275.1				11.6
	Fiscal 2016	281.7				11
	Fiscal 2017	286.1				10.4
	Fiscal 2018	290.8				10.2
	Fiscal Years 2019 – 2023	1,507.80				46.7
Fair Value, Assets Measured on Recurring Basis [Table Text Block]	'
	The following tables summarize our pension plan assets measured at fair value on a recurring basis (at least annually) as of September 30, 2013 and September 30, 2012 (in millions):
		September 30,				Quoted Prices				Significant				Significant
		2013				in Active				Other				Unobservable
						Markets for				Observable				Inputs (Level 3)
						Identical				Inputs (Level 2)
						Assets (Level 1)
	Equity securities:
	U.S. equities(a)	$	318			$	133.7			$	184.3			$	—
	Non-U.S. equities(a)	810.4				58.1				752.3				—
	Hedged equities(a)	267.2				—				267.2				—
	Fixed income securities:
	U.S. government securities(b)	127.8				—				127.8				—
	Non-U.S. government securities(c)	94.2				—				94.2				—
	US corporate bonds(c)	675.8				106.3				569.5				—
	Non-US corporate bonds(c)	478.3				170.8				307.5				—
	Mortgage-backed securities(c)	49.2				—				49.2				—
	Other fixed income(d)	225.3				—				225.3				—
	Short-term investments(e)	113.8				113.8				—				—
	Other investments:
	Alternative investments(f)	362.7				—				302.3				60.4
		$	3,522.70			$	582.7			$	2,879.60			$	60.4
		September 30, 2012				Quoted Prices				Significant				Significant
						in Active				Other				Unobservable
						Markets for				Observable				Inputs (Level 3)
						Identical				Inputs (Level 2)
						Assets (Level 1)
	Equity securities:
	U.S. equities(a)	$	275.5			$	107.1			$	168.4			$	—
	Non-U.S. equities(a)	808.3				99.8				708.5				—
	Hedged equities(a)	277.4				—				277.4				—
	Fixed income securities:
	U.S. government securities(b)	152.6				—				152.6				—
	Non-U.S. government securities(c)	83.6				—				83.6				—
	US corporate bonds(c)	667.7				98.3				569.4				—
	Non-US corporate bonds(c)	489.8				188.8				301				—
	Mortgage-backed securities(c)	46.5				—				46.5				—
	Other fixed income(d)	233				—				233				—
	Short-term investments(e)	114.4				114.4				—				—
	Other investments:
	Alternative investments(f)	331.4				—				268.1				63.3
		$	3,480.20			$	608.4			$	2,808.50			$	63.3
	(a)	Equity securities are comprised of the following investment types: (i) common stock; (ii) preferred stock; (iii) equity exchange traded funds; (iv) hedged equity investments and (v) commingled equity funds. Investments in common and preferred stocks and exchange traded funds are valued using quoted market prices multiplied by the number of shares owned. The hedged equity investment is a commingled fund that consists primarily of equity indexed investments which are hedged by options and also holds collateral in the form of short term treasury securities. The commingled fund investments are valued at the net asset value per share multiplied by the number of shares held. The determination of net asset value for the commingled funds includes market pricing of the underlying assets as well as broker quotes and other valuation techniques.
	(b)	U.S. government securities include treasury and agency debt. These investments are valued using broker quotes in an active market.
	(c)	These investments are valued utilizing a market approach that includes various valuation techniques and sources such as value generation models, broker quotes in active and non-active markets, benchmark yields and securities, reported trades, issuer spreads, and/or other applicable reference data. The U.S. corporate bonds category is primarily comprised of U.S. dollar denominated investment grade securities. Commingled debt funds are valued at their net asset value per share multiplied by the number of shares held. The determination of net asset value for the commingled funds includes market pricing of the underlying assets as well as broker quotes and other valuation techniques.
	(d)	Other fixed income is comprised of municipal and asset-backed securities. Investments are valued utilizing a market approach that includes various valuation techniques and sources such as, broker quotes in active and non-active markets, benchmark yields and securities, reported trades, issuer spreads and/or other applicable reference data.
	(e)	Short-term investments are valued at $1.00/unit, which approximates fair value. Amounts are generally invested in interest-bearing accounts.
	(f)	The alternative investments are diversified across multiple asset managers and several types of asset classes including hedge funds, private equity partnerships and real estate funds. The hedge funds are valued at net asset value. Fair value of the private equity partnerships is determined based on discounted cash flow analysis that utilizes unobservable inputs such as weighted average cost of capital ranging from 8.8% to 16.1% for 2013 and 7.3% to 20.0% for 2012; residual growth rate assumptions ranging from 1.0% to 4.0% for 2013 and 1.5% to 4.0% for 2012; revenue growth rates ranging from 2.2% to 6.6% for 2013 and 1.6% to 9.1% for 2012; and EBITDA of market comparable companies with multiples ranging from 7.0 to 13.2 for 2013 and 4.8 to 14.5 for 2012. The fair value of our real estate funds is based on the utilization of various unobservable inputs including but not limited to rental rate factors ranging from 0% to 25% for 2013 and 2012; capitalization rates ranging from 5% to 8% for 2013 and 2012; discount rates ranging from 7% to 9% for 2013 and 2012; and inflation rates ranging from 0% to 5% for 2013 and 2012.
Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets [Table Text Block]	'
	The following table summarizes the changes in our Level 3 pension plan assets for the years ended September 30, 2013 and 2012 (in millions):
		Non-US				Alternative				Total
		Corporate				Investments
		Bonds
	Balance as of September 30, 2011	$	1.4			$	181.9			$	183.3
	Purchases, sales, issuances, and settlements, net	(1.3		)		(1.6		)		(2.9		)
	Actual return on plan assets:
	Relating to instruments still held at end of year	—				9.7				9.7
	Relating to instruments sold during the year	(0.1		)		2.8				2.7
	Transfers out of level 3	—				(129.5		)		(129.5		)
	Balance as of September 30, 2012	$	—			$	63.3			$	63.3
	Purchases, sales, issuances, and settlements, net	—				(9.0		)		(9.0		)
	Actual return on plan assets:
	Relating to instruments still held at end of year	—				2.5				2.5
	Relating to instruments sold during the year	—				3.6				3.6
	Balance as of September 30, 2013	$	—			$	60.4			$	60.4
Schedule Of Multiemployer Plans [Table Text Block]	'
	The following table lists our participation in our multiemployer and other plans that are individually significant for the years ended September 30 (in millions):
	Pension Fund	EIN / Pension Plan Number		Pension Protection Act Zone Status				FIP / RP Status Pending / Implemented		Contributions (a)										Surcharge imposed?		Expiration CBA
				2013		2012				2013				2012			2011
	U.S. Multiemployer plans:
	Pace Industry Union-Management Pension Fund	11-6166763 / 001		Red		Red		Implemented		$	3.9			$	3.6		$	1.8		Yes		9/30/11 to 8/2/2017
	Other Funds									3.2				6.2			2.8
	Total Contributions:									$	7.1			$	9.8		$	4.6
	(a)	Contributions represent the amounts contributed to the plan during the fiscal year. Our contributions for fiscal 2012 and 2011 exceeded 5% of total plan contributions. Although the plan data for fiscal 2013 is not yet available, we would expect to continue to exceed 5% of total plan contributions. Contributions for fiscal 2013 exclude $13.2 million accrued related to a partial plan withdrawal.

ShareBased_Compensation_Tables

Share-Based Compensation (Tables)	12 Months Ended
	Sep. 30, 2013
Stock Based Compensation [Abstract]	'
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]	'
	We applied the following weighted average assumptions to estimate the fair value of stock option grants made in the following periods:
		2013		2012			2011
	Expected term in years	5.8		5.3			5.2
	Expected volatility	44	%	47.3	%		46.5	%
	Risk-free interest rate	1	%	0.8	%		2.1	%
	Dividend yield	1.4	%	1.4	%		1.4	%
Summary of stock option activity	'
	The table below summarizes the changes in all stock options during the year ended September 30, 2013:
		Shares		Weighted				Weighted		Aggregate
				Average				Average		Intrinsic
				Exercise				Remaining		Value
				Price				Contractual		(in millions)
								Term
								(in years)
	Outstanding at September 30, 2012	1,341,969		$	41.73
	Granted	197,860		79.81
	Exercised	(312,293	)	31.83
	Expired	(3,200	)	34.5
	Forfeited	(40,585	)	66.29
	Outstanding at September 30, 2013	1,183,751		$	49.88			6.4		$	60.8
	Exercisable at September 30, 2013	698,916		$	35.31			4.9		$	46.1
	Vested and expected to vest at September 30, 2013	1,164,815		$	49.51			6.4		$	60.3
Summary of restricted stock awards - vested, granted and changes	'
	The following table represents a summary of restricted stock shares granted in fiscal 2013, 2012 and 2011 with terms defined in the applicable grant letters. The shares are not deemed to be issued and carry dividend and voting rights until the relevant conditions defined in the award documents have been met, unless otherwise noted.
		2013		2012			2011
	Shares of restricted stock granted to non-employee directors(1)	11,925		20,700			20,155
	Shares of restricted stock granted to employees:
	Shares granted for attainment of a performance condition at an amount in excess of target(2)	120,293		—			173,028
	Shares granted with a service condition and a Cash Flow to Equity Ratio performance condition at target(3)	314,120		389,550			262,775
	Shares granted with a service condition(4)	15,000		—			—
	Total restricted stock granted	461,338		410,250			455,958
	-1	Non-employee director grants vest over one year and are deemed issued on the grant date and have voting and dividend rights. Also includes converted restricted stock units held by the Smurfit-Stone directors who served on the RockTenn board of directors in fiscal 2011.
	-2	Shares issued in fiscal 2013 for the fiscal 2010 Cash Flow to Equity Ratio were at 150% of target. Shares issued in fiscal 2011 for the fiscal 2009 Cash Flow to Equity Ratio, the fiscal 2008 Annual Average Return over Capital Costs and the fiscal 2008 Total Shareholder Return were each at 150% of target.
	-3	These employee grants vest over approximately three years and have adjustable ranges from 0-200% of target subject to the level of performance attained in the respective award agreement.
	-4	These shares vest over four years.
	The following table represents a summary of restricted stock vested in fiscal 2013, 2012 and 2011 (in millions, except shares):
		2013			2012				2011
	Shares of restricted stock vested	379,843			495,368				420,596
	Aggregate fair value of restricted stock vested	$	26.6		$	33.6			$	28
	The table below summarizes the changes in unvested restricted stock awards during the year ended September 30, 2013:
		Shares		Weighted
				Average
				Grant Date Fair
				Value
	Unvested at September 30, 2012	862,675		$	58.66
	Granted	461,338		71.6
	Vested	(379,843	)	43.69
	Forfeited	(66,610	)	66.42
	Unvested at September 30, 2013(1)	877,560		$	71.35
	-1	Target awards, net of subsequent forfeitures, granted in fiscal 2013, 2012 and 2011 of 302,360, 323,275 and 225,000 shares, respectively, may be increased to 200% of the target or decreased to zero, subject to the level of performance attained. The awards are reflected in the table at the target award amount of 100%. Based on current facts and assumptions we are forecasting the performance of the fiscal 2013, fiscal 2012 and fiscal 2011 grants to be attained at approximately 200%, 200% and 100% of target, respectively. However, it is possible that the performance attained may vary.

Segment_Information_Tables

Segment Information (Tables)	12 Months Ended
	Sep. 30, 2013
Revenues from External Customers, Segment Income and Long-Lived Assets [Line Items]	'
Schedule of Revenue from External Customers, Segment Income and Long-Lived Assets, by Geographical Areas [Table Text Block]	'
	The table below reflects financial data of our foreign operations for each of the past three fiscal years (in millions, except percentages):
		Years Ended September 30,
		2013			2012			2011
	Foreign net sales to unaffiliated customers	$	1,272.50		$	1,238.60		$	639
	Foreign segment income	$	95.9		$	48.7		$	62.1
	Foreign long-lived assets	$	444.6		$	496.7		$	513.1
	Foreign operations as a percent of consolidated operations:
	Foreign net sales to unaffiliated customers	13.3		%	13.5		%	11.8		%
	Foreign segment income	9.7		%	6.8		%	11.7		%
	Foreign long-lived assets	8		%	8.9		%	9.3		%
Certain operating data for segments	'
	The following table shows selected operating data for our segments (in millions):
		Years Ended September 30,
		2013			2012			2011
	Net sales (aggregate):
	Corrugated Packaging	$	6,661.70		$	6,169.40		$	2,766.30
	Consumer Packaging	1,898.70			1,919.30			1,910.30
	Merchandising Displays	674.6			656			468
	Recycling	494.1			650.5			383.3
	Total	$	9,729.10		$	9,395.20		$	5,527.90
	Less net sales (intersegment):
	Corrugated Packaging	$	115.6		$	122.3		$	81.7
	Consumer Packaging	25.1			25.9			28.4
	Merchandising Displays	17.1			14.6			11.2
	Recycling	25.9			24.8			7
	Total	$	183.7		$	187.6		$	128.3
	Net sales (unaffiliated customers):
	Corrugated Packaging	$	6,546.10		$	6,047.10		$	2,684.60
	Consumer Packaging	1,873.60			1,893.40			1,881.90
	Merchandising Displays	657.5			641.4			456.8
	Recycling	468.2			625.7			376.3
	Total	$	9,545.40		$	9,207.60		$	5,399.60
	Segment income:
	Corrugated Packaging	$	678.8		$	363.7		$	241.1
	Consumer Packaging	231.3			277.2			222.6
	Merchandising Displays	64.4			70.3			53.2
	Recycling	14.4			7.1			14.8
	Segment income	988.9			718.3			531.7
	Restructuring and other costs, net	(78.0		)	(75.2		)	(93.3		)
	Non-allocated expenses	(92.1		)	(109.7		)	(79.5		)
	Interest expense	(106.9		)	(119.7		)	(88.9		)
	Loss on extinguishment of debt	(0.3		)	(25.9		)	(39.5		)
	Interest income and other (expense) income, net	(0.9		)	1.3			(15.0		)
	Income before income taxes	$	710.7		$	389.1		$	215.5
	The following table shows selected operating data for our segments (in millions):
		Years Ended September 30,
		2013			2012			2011
	Identifiable assets:
	Corrugated Packaging	$	8,233.80		$	8,297.10		$	8,155.50
	Consumer Packaging	1,464.40			1,454.10			1,452.10
	Merchandising Displays	349.9			304.6			283.3
	Recycling	231.7			248.9			308.3
	Assets held for sale	14.3			9.6			31.9
	Corporate	439.3			372.8			334.9
	Total	$	10,733.40		$	10,687.10		$	10,566.00
	Goodwill:
	Corrugated Packaging	$	1,447.00		$	1,448.20		$	1,427.40
	Consumer Packaging	327.6			329.6			326.8
	Merchandising Displays	34.6			34.6			33.9
	Recycling	52.9			52.9			$	51.3
	Total	$	1,862.10		$	1,865.30		$	1,839.40
	Depreciation, depletion and amortization:
	Corrugated Packaging	$	426.7		$	410.5		$	163.6
	Consumer Packaging	88.8			86.2			85.4
	Merchandising Displays	10.8			10.7			6.9
	Recycling	12.7			13.4			5
	Corporate	13.2			13.5			17.4
	Total	$	552.2		$	534.3		$	278.3
	Capital expenditures:
	Corrugated Packaging	$	306.1		$	327.7		$	74.3
	Consumer Packaging	83.5			75.8			100.9
	Merchandising Displays	17.1			8			5.4
	Recycling	11.3			10.3			14
	Corporate	22.4			30.6			4.8
Total	$	440.4		$	452.4		$	199.4
Changes in carrying amount of goodwill	'
	The changes in the carrying amount of goodwill for the fiscal years ended September 30, 2013, 2012 and 2011 are as follows (in millions):
		Corrugated Packaging			Consumer			Merchandising Displays			Recycling		Total
					Packaging
	Balance as of October 1, 2010
	Goodwill	$	392.1		$	370.4		$	28.9		$	0.2	$	791.6
	Accumulated impairment losses	—			(42.7		)	(0.1		)	—		(42.8		)
		392.1			327.7			28.8			0.2		748.8
	Goodwill acquired	1,035.40			—			5.1			51.1		1,091.60
	Translation adjustment	(0.1		)	(0.9		)	—			—		(1.0		)
	Balance as of September 30, 2011
	Goodwill	1,427.40			369.5			34			51.3		1,882.20
	Accumulated impairment losses	—			(42.7		)	(0.1		)	—		(42.8		)
		1,427.40			326.8			33.9			51.3		1,839.40
	Goodwill acquired	33.5			—			—			—		33.5
	Purchase price allocation adjustments	(13.2		)	—			0.7			1.6		(10.9		)
	Translation adjustment	0.5			2.8			—			—		3.3
	Balance as of September 30, 2012
	Goodwill	1,448.20			372.3			34.7			52.9		1,908.10
	Accumulated impairment losses	—			(42.7		)	(0.1		)	—		(42.8		)
		1,448.20			329.6			34.6			52.9		1,865.30
	Goodwill acquired	1.2			—			—			—		1.2
	Translation adjustment	(2.4		)	(2.0		)	—			—		(4.4		)
	Balance as of September 30, 2013
	Goodwill	1,447.00			370.3			34.7			52.9		1,904.90
	Accumulated impairment losses	—			(42.7		)	(0.1		)	—		(42.8		)
		$	1,447.00		$	327.6		$	34.6		$	52.9	$	1,862.10
	The goodwill acquired in fiscal 2013 related to the acquisition of a corrugated sheet plant. In fiscal 2012, the goodwill acquired was associated with the GMI and Mid South acquisitions. The goodwill acquired in fiscal 2011 was associated with the Smurfit-Stone Acquisition. We finalized the Smurfit-Stone purchase price allocation in fiscal 2012.

Financial_Results_by_Quarter_U1

Financial Results by Quarter (Unaudited) (Tables)	12 Months Ended
	Sep. 30, 2013
Financial Results by Quarter (Unaudited) [Abstract]	'
Schedule of Quarterly Financial Information	'
	Fiscal 2013	First			Second			Third			Fourth
		Quarter			Quarter			Quarter			Quarter
		(In millions, except per share data)
	Net sales	$	2,287.10		$	2,324.90		$	2,448.30		$	2,485.10
	Gross profit	409.5			385.2			496.7			555.1
	Restructuring and other costs, net	16.1			12.4			23.5			26
	Loss on extinguishment of debt	(0.2		)	(0.1		)	—			—
	Income before income taxes	141.7			109.1			203.1			256.8
	Consolidated net income	86.9			325.6			141.7			178.3
	Net income attributable to Rock-Tenn Company shareholders	86			324.7			140.1			176.5
	Basic earnings per share attributable to Rock-Tenn Company shareholders	1.2			4.51			1.94			2.45
	Diluted earnings per share attributable to Rock-Tenn Company shareholders	1.18			4.45			1.91			2.4
	Fiscal 2012	First			Second			Third			Fourth
		Quarter			Quarter			Quarter			Quarter
		(In millions, except per share data)
	Net sales	$	2,267.70		$	2,282.90		$	2,303.20		$	2,353.80
	Gross profit	392.2			360.8			359.8			419.9
	Restructuring and other costs, net	10.3			28.1			13.7			23.1
	Loss on extinguishment of debt	—			(19.5		)	(0.1		)	(6.3		)
	Income before income taxes	124.4			53.3			90.6			120.8
	Consolidated net income	76.8			32.7			59.3			83.4
	Net income attributable to Rock-Tenn Company shareholders	76.7			31.9			58.2			82.3
	Basic earnings per share attributable to Rock-Tenn Company shareholders	1.08			0.45			0.82			1.15
	Diluted earnings per share attributable to Rock-Tenn Company shareholders	1.06			0.44			0.81			1.14

Selected_Condensed_Consolidati1

Selected Condensed Consolidating Financial Statements of Parent, Guarantors and Non-Guarantors (Tables)	12 Months Ended
	Sep. 30, 2013
Condensed Financial Statements, Captions [Line Items]	'
Condensed Consolidating Statements of Income	'
		Year Ended September 30, 2011
								Non-
					Guarantor			Guarantor						Consolidated
		Parent			Subsidiaries			Subsidiaries			Eliminations			Total
		(In millions)
	Net sales	$	0.5		$	4,815.60		$	956.1		$	(372.6	)	$	5,399.60
	Cost of goods sold	0.6			3,932.60			738.8			(264.3		)	4,407.70
	Gross profit	(0.1		)	883			217.3			(108.3		)	991.9
	Selling, general and administrative expenses	1.7			447.6			91.9			—			541.2
	Restructuring and other costs, net	19.4			72.7			1.2			—			93.3
	Operating profit	(21.2		)	362.7			124.2			(108.3		)	357.4
	Interest expense	(84.2		)	(125.1		)	(21.7		)	142.1			(88.9		)
	Loss on extinguishment of debt	(38.6		)	(0.9		)	—			—			(39.5		)
	Interest income and other income (expense), net	61.5			(40.4		)	(2.3		)	(33.8		)	(15.0		)
	Equity in income (loss) of unconsolidated entities	—			1.9			(0.4		)	—			1.5
	Equity in income of consolidated entities	191.2			44.6			0.1			(235.9		)	—
	Income before income taxes	108.7			242.8			99.9			(235.9		)	215.5
	Income tax benefit (expense)	32.4			(73.0		)	(28.9		)	—			(69.5		)
	Consolidated net income	141.1			169.8			71			(235.9		)	146
	Less: Net income attributable to noncontrolling interests	—			(4.9		)	—			—			(4.9		)
	Net income attributable to Rock-Tenn Company shareholders	$	141.1		$	164.9		$	71		$	(235.9	)	$	141.1
	Comprehensive (loss) income attributable to Rock-Tenn Company shareholders	$	(65.9	)	$	(45.6	)	$	21.7		$	23.9		$	(65.9	)
		Year Ended September 30, 2013
								Non-
					Guarantor			Guarantor						Consolidated
		Parent			Subsidiaries			Subsidiaries			Eliminations			Total
		(In millions)
	Net sales	$	(0.1	)	$	8,553.10		$	1,674.90		$	(682.5	)	$	9,545.40
	Cost of goods sold	—			6,855.70			1,383.00			(539.8		)	7,698.90
	Gross profit	(0.1		)	1,697.40			291.9			(142.7		)	1,846.50
	Selling, general and administrative expenses	—			839.7			114.6			—			954.3
	Restructuring and other costs, net	(3.6		)	67.3			14.3			—			78
	Operating profit	3.5			790.4			163			(142.7		)	814.2
	Interest expense	(103.1		)	(48.1		)	(26.0		)	70.3			(106.9		)
	Loss on extinguishment of debt	(0.1		)	—			(0.2		)	—			(0.3		)
	Interest income and other income (expense), net	52.1			(126.7		)	1.3			72.4			(0.9		)
	Equity in income of unconsolidated entities	—			4.6			—			—			4.6
	Equity in income of consolidated entities	753.8			77.4			—			(831.2		)	—
	Income before income taxes	706.2			697.6			138.1			(831.2		)	710.7
	Income tax benefit (expense)	21.1			26			(25.3		)	—			21.8
	Consolidated net income	727.3			723.6			112.8			(831.2		)	732.5
	Less: Net income attributable to noncontrolling interests	—			(4.0		)	(1.2		)	—			(5.2		)
	Net income attributable to Rock-Tenn Company shareholders	$	727.3		$	719.6		$	111.6		$	(831.2	)	$	727.3
	Comprehensive income attributable to Rock-Tenn Company shareholders	$	927.3		$	920.3		$	84.2		$	(1,004.5	)	$	927.3
		Year Ended September 30, 2012
								Non-
					Guarantor			Guarantor						Consolidated
		Parent			Subsidiaries			Subsidiaries			Eliminations			Total
		(In millions)
	Net sales	$	0.1		$	8,225.30		$	1,648.30		$	(666.1	)	$	9,207.60
	Cost of goods sold	—			6,816.50			1,366.10			(507.7		)	7,674.90
	Gross profit	0.1			1,408.80			282.2			(158.4		)	1,532.70
	Selling, general and administrative expenses	2.3			797.7			127.5			—			927.5
	Restructuring and other costs, net	2.6			47.6			25			—			75.2
	Operating profit	(4.8		)	563.5			129.7			(158.4		)	530
	Interest expense	(106.4		)	(46.3		)	(29.4		)	62.4			(119.7		)
	Loss on extinguishment of debt	(25.9		)	—			—			—			(25.9		)
	Interest income and other income (expense), net	51.7			(147.0		)	0.6			96			1.3
	Equity in income of unconsolidated entities	—			3.4			—			—			3.4
	Equity in income of consolidated entities	302.4			15.7			—			(318.1		)	—
	Income before income taxes	217			389.3			100.9			(318.1		)	389.1
	Income tax benefit (expense)	32.1			(134.9		)	(34.1		)	—			(136.9		)
	Consolidated net income	249.1			254.4			66.8			(318.1		)	252.2
Less: Net income attributable to noncontrolling interests	—			(2.7		)	(0.4		)	—			(3.1		)
Net income attributable to Rock-Tenn Company shareholders	$	249.1		$	251.7		$	66.4		$	(318.1	)	$	249.1
Comprehensive income attributable to Rock-Tenn Company shareholders	$	47.8		$	46.7		$	63.6		$	(110.3	)	$	47.8
Condensed Consolidating Balance Sheets	'
		30-Sep-12
								Non-
					Guarantor			Guarantor						Consolidated
		Parent			Subsidiaries			Subsidiaries			Eliminations			Total
		(In millions)
	ASSETS
	Current assets:
	Cash and cash equivalents	$	—		$	—		$	37.2		$	—		$	37.2
	Restricted cash	40.6			—			—			—			40.6
	Accounts receivable, net	—			110.5			1,026.60			(61.5		)	1,075.60
	Inventories	—			700.1			161.8			—			861.9
	Other current assets	33.2			142.8			25.7			(27.2		)	174.5
	Intercompany receivables	396.8			793.1			148.2			(1,338.1		)	—
	Total current assets	470.6			1,746.50			1,399.50			(1,426.8		)	2,189.80
	Net property, plant and equipment	—			5,102.90			508.5			—			5,611.40
	Goodwill	—			1,761.40			103.9			—			1,865.30
	Intangibles, net	—			782.9			12.2			—			795.1
	Intercompany notes receivable	768			403.3			0.7			(1,172.0		)	—
	Investments in consolidated subsidiaries	5,642.30			365.8			—			(6,008.1		)	—
	Other assets	42.9			123.6			59			—			225.5
		$	6,923.80		$	10,286.40		$	2,083.80		$	(8,606.9	)	$	10,687.10
	LIABILITIES AND EQUITY
	Current liabilities:
	Current portion of debt	$	202.9		$	—		$	58.4		$	—		$	261.3
	Accounts payable	—			642.4			128			(61.5		)	708.9
	Accrued compensation and benefits	—			178.2			33.2			—			211.4
	Other current liabilities	43.7			160.7			49.5			(27.2		)	226.7
	Intercompany payables	602.4			658			77.7			(1,338.1		)	—
	Total current liabilities	849			1,639.30			346.8			(1,426.8		)	1,408.30
	Long-term debt due after one year	2,555.70			—			595.5			—			3,151.20
	Intercompany notes payable	109.3			733.9			328.8			(1,172.0		)	—
	Pension liabilities, net of current portion	—			1,283.00			210.1			—			1,493.10
	Postretirement benefit liabilities, net of current portion	—			102.1			52.1			—			154.2
	Deferred income taxes	—			861.3			27.5			—			888.8
	Other long-term liabilities	4.1			166.5			3.3			—			173.9
	Redeemable noncontrolling interests	—			7.5			3.9			—			11.4
	Total Rock-Tenn Company shareholders' equity	3,405.70			5,492.30			515.8			(6,008.1		)	3,405.70
	Noncontrolling interests	—			0.5			—			—			0.5
	Total equity	3,405.70			5,492.80			515.8			(6,008.1		)	3,406.20
		$	6,923.80		$	10,286.40		$	2,083.80		$	(8,606.9	)	$	10,687.10
		30-Sep-13
								Non-
					Guarantor			Guarantor						Consolidated
		Parent			Subsidiaries			Subsidiaries			Eliminations			Total
		(In millions)
	ASSETS
	Current assets:
	Cash and cash equivalents	$	14.8		$	1.2		$	20.4		$	—		$	36.4
	Restricted cash	9.3			—			—			—			9.3
	Accounts receivable, net	—			84.7			1,098.00			(47.8		)	1,134.90
	Inventories	—			779.6			158.3			—			937.9
	Other current assets	20.3			265.7			32.1			(20.2		)	297.9
	Intercompany receivables	56.3			26.8			44.5			(127.6		)	—
	Total current assets	100.7			1,158.00			1,353.30			(195.6		)	2,416.40
	Net property, plant and equipment	—			5,098.50			456.2			—			5,554.70
	Goodwill	—			1,762.60			99.5			—			1,862.10
	Intangibles, net	—			688.2			11.2			—			699.4
	Intercompany notes receivable	503.5			645.9			1.3			(1,150.7		)	—
	Investments in consolidated subsidiaries	6,230.40			364			—			(6,594.4		)	—
	Other assets	42.2			124.9			41.7			(8.0		)	200.8
		$	6,876.80		$	9,842.10		$	1,963.20		$	(7,948.7	)	$	10,733.40
	LIABILITIES AND EQUITY
	Current liabilities:
Current portion of debt	$	—		$	—		$	2.9		$	—		$	2.9
Accounts payable	—			733.2			116.7			(47.8		)	802.1
Accrued compensation and benefits	—			220.9			28.1			—			249
Other current liabilities	15.3			148.8			45.5			(20.2		)	189.4
Intercompany payables	0.5			76.6			50.5			(127.6		)	—
Total current liabilities	15.8			1,179.50			243.7			(195.6		)	1,243.40
Long-term debt due after one year	2,391.10			—			450.8			—			2,841.90
Intercompany notes payable	152.9			469.1			528.7			(1,150.7		)	—
Pension liabilities, net of current portion	—			811.8			163.4			—			975.2
Postretirement benefit liabilities, net of current portion	—			74.3			44			—			118.3
Deferred income taxes	—			1,061.00			10.1			(8.0		)	1,063.10
Other long-term liabilities	4.7			157.4			3.3			—			165.4
Redeemable noncontrolling interests	—			8.1			5.2			—			13.3
Total Rock-Tenn Company shareholders' equity	4,312.30			6,080.40			514			(6,594.4		)	4,312.30
Noncontrolling interests	—			0.5			—			—			0.5
Total equity	4,312.30			6,080.90			514			(6,594.4		)	4,312.80
	$	6,876.80		$	9,842.10		$	1,963.20		$	(7,948.7	)	$	10,733.40
Condensed Consolidating Statements of Cash Flows	'
		Year Ended September 30, 2013
								Non-
					Guarantor			Guarantor						Consolidated
		Parent			Subsidiaries			Subsidiaries			Eliminations			Total
		(In millions)
	Operating activities:
	Net cash provided by (used for) operating activities	$	409		$	1,053.20		$	(43.4	)	$	(386.3	)	$	1,032.50
	Investing activities:
	Capital expenditures	—			(419.4		)	(21.0		)	—			(440.4		)
	Cash paid for purchase of business, net of cash acquired	—			(6.3		)	—			—			(6.3		)
	Investment in unconsolidated entities	—			(0.1		)	—			—			(0.1		)
	Return of capital from unconsolidated entities	—			1			—			—			1
	Proceeds from sale of property, plant and equipment	—			16			10.8			—			26.8
	Proceeds from property, plant and equipment insurance settlement	—			15.4			—			—			15.4
	Intercompany notes issued	(468.8		)	(562.6		)	—			1,031.40			—
	Intercompany notes proceeds	732.8			319.9			—			(1,052.7		)	—
	Intercompany return of capital	0.8			0.4			—			(1.2		)	—
	Net cash provided by (used for) investing activities	264.8			(635.7		)	(10.2		)	(22.5		)	(403.6		)
	Financing activities:
	Additions to revolving credit facilities	74.3			—			24.7			—			99
	Repayments of revolving credit facilities	(86.9		)	—			(59.3		)	—			(146.2		)
	Additions to debt	—			—			277			—			277
	Repayments of debt	(355.6		)	—			(431.8		)	—			(787.4		)
	Debt issuance costs	(1.0		)	—			(1.0		)	—			(2.0		)
	Cash paid for debt extinguishment costs	(0.1		)	—			—			—			(0.1		)
	Issuances of common stock, net of related minimum tax withholdings	3.5			—			—			—			3.5
	Excess tax benefits from share-based compensation	—			6			—			—			6
	(Repayments to) advances from consolidated entities	(261.5		)	185.4			76.1			—			—
	Advances from unconsolidated entity	—			1.2			—			—			1.2
	Cash dividends paid to shareholders	(75.3		)	—			—			—			(75.3		)
	Cash distributions paid to noncontrolling interests	—			—			(4.9		)	—			(4.9		)
	Intercompany notes borrowing	43.6			467.8			520			(1,031.4		)	—
	Intercompany notes payments	—			(732.6		)	(320.1		)	1,052.70			—
	Intercompany capital return	—			(0.8		)	(0.4		)	1.2			—
	Intercompany dividends	—			(343.3		)	(43.0		)	386.3			—
	Net cash (used for) provided by financing activities	(659.0		)	(416.3		)	37.3			408.8			(629.2		)
	Effect of exchange rate changes on cash and cash equivalents	—			—			(0.5		)	—			(0.5		)
	Increase (decrease) in cash and cash equivalents	14.8			1.2			(16.8		)	—			(0.8		)
	Cash and cash equivalents at beginning of period	—			—			37.2			—			37.2
	Cash and cash equivalents at end of period	$	14.8		$	1.2		$	20.4		$	—		$	36.4
		Year Ended September 30, 2012
								Non-
					Guarantor			Guarantor						Consolidated
		Parent			Subsidiaries			Subsidiaries			Eliminations			Total
		(In millions)
	Operating activities:
	Net cash provided by (used for) operating activities	$	132.9		$	540		$	151.4		$	(167.6	)	$	656.7
	Investing activities:
	Capital expenditures	—			(426.5		)	(25.9		)	—			(452.4		)
	Cash paid for the purchase of a leased facility	—			(17.0		)	—			—			(17.0		)
	Cash paid for purchase of business, net of cash acquired	(93.5		)	(32.1		)	—			—			(125.6		)
	Investment in unconsolidated entities	—			(1.7		)	—			—			(1.7		)
	Return of capital from unconsolidated entities	—			1.8			—			—			1.8
	Proceeds from sale of property, plant and equipment	—			17.9			22.6			—			40.5
	Proceeds from property, plant and equipment insurance settlement	—			10.2			—			—			10.2
	Intercompany notes issued	(36.1		)	(156.2		)	—			192.3			—
	Intercompany notes proceeds	27.6			1.8			—			(29.4		)	—
	Intercompany capital investment	(89.3		)	—			—			89.3			—
	Intercompany return of capital	378.9			—			—			(378.9		)	—
	Net cash provided by (used for) investing activities	187.6			(601.8		)	(3.3		)	(126.7		)	(544.2		)
	Financing activities:
	Proceeds from issuance of notes	1,442.20			—			—			—			1,442.20
	Additions to revolving credit facilities	687.4			—			60.7			—			748.1
Repayments of revolving credit facilities	(674.4		)	—			(85.4		)	—			(759.8		)
Additions to debt	227.1			—			99.5			—			326.6
Repayments of debt	(1,527.6		)	(28.8		)	(247.2		)	—			(1,803.6		)
Debt issuance costs	(16.2		)	—			—			—			(16.2		)
Cash paid for debt extinguishment costs	(14.0		)	—			—			—			(14.0		)
Issuances of common stock, net of related minimum tax withholdings	5.2			—			—			—			5.2
Excess tax benefits from share-based compensation	—			10			—			—			10
(Repayments to) advances from consolidated entities	(470.6		)	505.9			(35.3		)	—			—
Advances from unconsolidated entity	—			0.2			—			—			0.2
Cash dividends paid to shareholders	(56.5		)	—			—			—			(56.5		)
Cash distributions paid to noncontrolling interests	—			—			(0.8		)	—			(0.8		)
Intercompany notes borrowing	76.9			35.6			79.8			(192.3		)	—
Intercompany notes payments	—			(10.0		)	(19.4		)	29.4			—
Intercompany capital receipt	—			39.3			50			(89.3		)	—
Intercompany capital return	—			(378.9		)	—			378.9			—
Intercompany dividends	—			(115.1		)	(52.5		)	167.6			—
Net cash (used for) provided by financing activities	(320.5		)	58.2			(150.6		)	294.3			(118.6		)
Effect of exchange rate changes on cash and cash equivalents	—			—			1.6			—			1.6
(Decrease) in cash and cash equivalents	—			(3.6		)	(0.9		)	—			(4.5		)
Cash and cash equivalents at beginning of period	—			3.6			38.1			—			41.7
Cash and cash equivalents at end of period	$	—		$	—		$	37.2		$	—		$	37.2
	Year Ended September 30, 2011
							Non-
				Guarantor			Guarantor						Consolidated
	Parent			Subsidiaries			Subsidiaries			Eliminations			Total
	(In millions)
Operating activities:
Net cash provided by (used for) operating activities	$	50.3		$	1,051.60		$	(601.1	)	$	(39.1	)	$	461.7
Investing activities:
Capital expenditures	—			(172.2		)	(27.2		)	—			(199.4		)
Cash paid for purchase of business, net of cash acquired	(1,300.1		)	—			—			—			(1,300.1		)
Investment in unconsolidated entities	—			(2.0		)	—			—			(2.0		)
Return of capital from unconsolidated entities	—			0.8			0.2			—			1
Proceeds from sale of property, plant and equipment	—			7.4			1.2			—			8.6
Proceeds from property, plant and equipment insurance settlement	—			0.5			—			—			0.5
Intercompany notes issued	(16.7		)	(39.5		)	—			56.2			—
Intercompany notes proceeds	174.4			270			8.9			(453.3		)	—
Intercompany capital investment	(1,171.7		)	(207.1		)	—			1,378.80			—
Intercompany return of capital	102.3			2.1			—			(104.4		)	—
Net cash (used for) provided by investing activities	(2,211.8		)	(140.0		)	(16.9		)	877.3			(1,491.4		)
Financing activities:
Additions to revolving credit facilities	553.2			—			249.4			—			802.6
Repayments of revolving credit facilities	(562.5		)	—			(2.0		)	—			(564.5		)
Additions to debt	2,225.00			—			652.4			—			2,877.40
Repayments of debt	(626.6		)	(1,169.1		)	(170.6		)	—			(1,966.3		)
Debt issuance costs	(43.8		)	—			—			—			(43.8		)
Cash paid for debt extinguishment costs	(37.9		)	—			—			—			(37.9		)
Issuances of common stock, net of related minimum tax withholdings	25.2			—			—			—			25.2
Advances from (repayments to) consolidated entities	657.9			(598.5		)	(59.4		)	—			—
Advances from unconsolidated entity	—			1.7			—			—			1.7
Cash dividends paid to shareholders	(37.6		)	—			—			—			(37.6		)
Cash distributions paid to noncontrolling interests	—			—			(5.2		)	—			(5.2		)
Intercompany notes borrowing	17.5			—			38.7			(56.2		)	—
Intercompany notes payments	(8.9		)	(174.4		)	(270.0		)	453.3			—
Intercompany capital receipt	—			1,136.70			242.1			(1,378.8		)	—
Intercompany capital return	—			(102.3		)	(2.1		)	104.4			—
Intercompany dividends	—			(2.7		)	(36.4		)	39.1			—
Net cash provided by (used for) financing activities	2,161.50			(908.6		)	636.9			(838.2		)	1,051.60
Effect of exchange rate changes on cash and cash equivalents	—			—			3.9			—			3.9
Increase in cash and cash equivalents	—			3			22.8			—			25.8
Cash and cash equivalents at beginning of period	—			0.6			15.3			—			15.9
Cash and cash equivalents at end of period	$	—		$	3.6		$	38.1		$	—		$	41.7

Description_of_Business_and_Su3

Description of Business and Summary of Significant Accounting Policies (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2011
Description of Business and Summary of Significant Accounting Policies [Line Items]	'		'		'
Provision for Doubtful Accounts	$5.60		$6.60		$1.10
Percentage of FIFO Inventory	24.00%		29.00%		'
Interest Costs, Capitalized During Period	2.9		3.4		2.8
Depreciation	461.3		434.6		228.2
Finite-Lived Intangible Assets, Useful Life	'12 years 5 months		'		'
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	'3 years		'		'
Asset Retirement Obligation	14.9		16.3		'
Foreign Currency Transaction Gain, after Tax	2.5		'		3.9
Foreign Currency Transaction Loss, after Tax	'		5.5		'
Foreign Currency Transaction Loss Related to Intercompany Loan, after Tax	'		'		13.5
Allowance for Doubtful Accounts [Member]	'		'		'
Movement in Valuation Allowances and Reserves [Roll Forward]	'		'		'
Balance at the beginning of period	26.9		30.1		7.8
Reduction in sales and charges to costs and expenses	126.4	[1]	107.9	[1]	78.2	[1]
Deductions	-126.5		-111.1		-55.9
Balance at end of period	$26.80		$26.90		$30.10
Minimum [Member]	'		'		'
Description of Business and Summary of Significant Accounting Policies [Line Items]	'		'		'
Accounts Receivable, Approximate Range Receivables Due, Days	'30 days		'		'
Finite-Lived Intangible Assets, Useful Life	'2 years		'		'
Minimum [Member] | Building and Building Improvements [Member]	'		'		'
Description of Business and Summary of Significant Accounting Policies [Line Items]	'		'		'
Property, Plant and Equipment, Useful Life	'15 years		'		'
Minimum [Member] | Machinery and Equipment [Member]	'		'		'
Description of Business and Summary of Significant Accounting Policies [Line Items]	'		'		'
Property, Plant and Equipment, Useful Life	'3 years		'		'
Minimum [Member] | Transportation Equipment [Member]	'		'		'
Description of Business and Summary of Significant Accounting Policies [Line Items]	'		'		'
Property, Plant and Equipment, Useful Life	'3 years		'		'
Minimum [Member] | Leasehold Improvements [Member]	'		'		'
Description of Business and Summary of Significant Accounting Policies [Line Items]	'		'		'
Property, Plant and Equipment, Useful Life	'3 years		'		'
Maximum [Member]	'		'		'
Description of Business and Summary of Significant Accounting Policies [Line Items]	'		'		'
Accounts Receivable, Approximate Range Receivables Due, Days	'60 days		'		'
Finite-Lived Intangible Assets, Useful Life	'40 years		'		'
Maximum [Member] | Building and Building Improvements [Member]	'		'		'
Description of Business and Summary of Significant Accounting Policies [Line Items]	'		'		'
Property, Plant and Equipment, Useful Life	'40 years		'		'
Maximum [Member] | Machinery and Equipment [Member]	'		'		'
Description of Business and Summary of Significant Accounting Policies [Line Items]	'		'		'
Property, Plant and Equipment, Useful Life	'20 years		'		'
Maximum [Member] | Transportation Equipment [Member]	'		'		'
Description of Business and Summary of Significant Accounting Policies [Line Items]	'		'		'
Property, Plant and Equipment, Useful Life	'8 years		'		'
Maximum [Member] | Machinery and Equipment, Mills [Member]	'		'		'
Description of Business and Summary of Significant Accounting Policies [Line Items]	'		'		'
Property, Plant and Equipment, Useful Life	'44 years		'		'
Maximum [Member] | Leasehold Improvements [Member]	'		'		'
Description of Business and Summary of Significant Accounting Policies [Line Items]	'		'		'
Property, Plant and Equipment, Useful Life	'10 years		'		'
Restricted Stock, Non-Employee Directors [Member]	'		'		'
Description of Business and Summary of Significant Accounting Policies [Line Items]	'		'		'
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	'1 year		'		'
[1]	Includes the impact of acquisitions.

Earnings_per_Share_Details

Earnings per Share (Details) (USD $)

3 Months Ended

12 Months Ended

In Millions, except Per Share data, unless otherwise specified

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2013

Sep. 30, 2012

27-May-11

Employee Stock Option [Member]

Employee Stock Option [Member]

Employee Stock Option [Member]

Smurfit Stone [Member]

Smurfit Stone [Member]

Smurfit Stone [Member]

Earnings Per Share, Basic and Diluted, by Common Class [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net income attributable to Rock-Tenn Company shareholders

$176.50

$140.10

$324.70

$86

$82.30

$58.20

$31.90

$76.70

$727.30

$249.10

$141.10

'

'

'

'

'

'

Less: Distributed and undistributed income available to participating securities

'

'

'

'

'

'

'

'

-0.2

-0.8

-1.4

'

'

'

'

'

'

Distributed and undistributed income attributable to Rock-Tenn Company shareholders

'

'

'

'

'

'

'

'

727.1

248.3

139.7

'

'

'

'

'

'

Basic weighted average shares outstanding

'

'

'

'

'

'

'

'

72

71.2

49.7

'

'

'

'

'

'

Basic earnings per share attributable to Rock-Tenn Company shareholders

$2.45

$1.94

$4.51

$1.20

$1.15

$0.82

$0.45

$1.08

$10.10

$3.49

$2.81

'

'

'

'

'

'

Less: Distributed and undistributed income available to participating securities

'

'

'

'

'

'

'

'

-0.2

-0.7

-1.4

'

'

'

'

'

'

Distributed and undistributed income attributable to Rock-Tenn Company shareholders

'

'

'

'

'

'

'

'

$727.10

$248.40

$139.70

'

'

'

'

'

'

Effect of dilutive stock options and non-participating securities

'

'

'

'

'

'

'

'

1.1

0.9

0.8

'

'

'

'

'

'

Diluted weighted average shares outstanding

'

'

'

'

'

'

'

'

73.1

72.1

50.5

'

'

'

'

'

'

Diluted earnings per share attributable to Rock-Tenn Company shareholders

$2.40

$1.91

$4.45

$1.18

$1.14

$0.81

$0.44

$1.06

$9.95

$3.45

$2.77

'

'

'

'

'

'

Shares reserved for future issuance

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.2

0.7

0.7

Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount

'

'

'

'

'

'

'

'

'

'

'

0.1

0.3

0.1

'

'

'

Schedule_of_Accumulated_Other_

Schedule of Accumulated Other Comprehensive Income (Loss) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2011
Accumulated Other Comprehensive Income (Loss) [Line Items]	'		'		'
Balance at beginning of year	($500.50)	[1]	'		'
Other comprehensive income (loss) before reclassifications	175.4	[1]	'		'
Amounts reclassified from accumulated other comprehensive income	24.5	[1]	'		'
Net current period other comprehensive income (loss)	199.9	[1]	-201.3		-207
Balance at end of year	-300.6	[1]	-500.5	[1]	'
Accumulated Net Gain (Loss) from Designated or Qualifying Cash Flow Hedges [Member]	'		'		'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'		'		'
Balance at beginning of year	-0.2	[1]	'		'
Other comprehensive income (loss) before reclassifications	0	[1]	'		'
Amounts reclassified from accumulated other comprehensive income	0	[1]	'		'
Net current period other comprehensive income (loss)	0	[1]	'		'
Balance at end of year	-0.2	[1]	'		'
Accumulated Defined Benefit Plans Adjustment [Member]	'		'		'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'		'		'
Balance at beginning of year	-547.8	[1]	'		'
Other comprehensive income (loss) before reclassifications	190.4	[1]	'		'
Amounts reclassified from accumulated other comprehensive income	24.5	[1]	'		'
Net current period other comprehensive income (loss)	214.9	[1]	'		'
Balance at end of year	-332.9	[1]	'		'
Accumulated Translation Adjustment [Member]	'		'		'
Accumulated Other Comprehensive Income (Loss) [Line Items]	'		'		'
Balance at beginning of year	47.5	[1]	'		'
Other comprehensive income (loss) before reclassifications	-15	[1]	'		'
Amounts reclassified from accumulated other comprehensive income	0	[1]	'		'
Net current period other comprehensive income (loss)	-15	[1]	'		'
Balance at end of year	$32.50	[1]	'		'
[1]	All amounts are net of tax and noncontrolling interest.

Reclassification_out_of_Accumu

Reclassification out of Accumulated Other Comprehensive Income (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2011
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'		'	'
Amortization of net actuarial loss, Pre-Tax Amount	$39.30		$21.40	$18.90
Amortization of net actuarial loss, Tax	-15.1		-8.1	-6.7
Amortization of net actuarial loss, included in pension cost	24.2		13.3	12.2
Amortization of prior service cost, Pre-Tax Amount	1.5		0.7	0.7
Amortization of prior service cost, Tax	-0.6		-0.3	-0.3
Amortization of prior service cost, included in pension cost	0.9		0.4	0.4
Parent [Member]	'		'	'
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'		'	'
Amortization of net actuarial loss, Pre-Tax Amount	-38.6	[1],[2]	'	'
Amortization of net actuarial loss, Tax	15	[1],[2]	'	'
Amortization of net actuarial loss, included in pension cost	-23.6	[1],[2]	'	'
Amortization of prior service cost, Pre-Tax Amount	-1.5	[1],[2]	'	'
Amortization of prior service cost, Tax	0.6	[1],[2]	'	'
Amortization of prior service cost, included in pension cost	-0.9	[1],[2]	'	'
Total Reclassifications From Other Comprehensive Income Before Tax	-40.1	[2]	'	'
Total Reclassifications From Other Comprehensive Income Tax Portion	15.6	[2]	'	'
Total Reclassifications From Other Comprehensive Income Net Of Tax	($24.50)	[2]	'	'
[1]	These accumulated other comprehensive income components are included in the computation of net periodic pension cost. See “Note 12. Retirement Plans” for additional details.
[2]	Amounts in parentheses indicate charges to earnings. Amounts pertaining to noncontrolling interests are excluded.

Other_Comprehensive_Income_Los2

Other Comprehensive Income (Loss) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012	Sep. 30, 2011
Other Comprehensive Income (Loss), Foreign Currency Translation Gain (Loss), before Tax	($15.10)		$18.30	($13)
Comprehensive Income	'		'	'
Net deferred loss on cash flow hedges, Pre-Tax Amount	'		-0.1	-0.4
Reclassification adjustment of net loss on cash flow hedges included in earnings, Pre-Tax Amount	'		2.3	6.9
Net actuarial gain (loss) arising during period, Pre-Tax Amount	303.9		-375	-336
Amortization of net actuarial loss, Pre-Tax Amount	39.3		21.4	18.9
Prior service (cost) credit arising during period, Pre-Tax Amount	5.2		-2.2	0.3
Amortization of prior service cost, Pre-Tax Amount	1.5		0.7	0.7
Other adjustments, Pre-Tax Amount	0		'	'
Consolidated other comprehensive income (loss), Pre-Tax Amount	334.8		-334.6	-322.6
Less: Other comprehensive (income) loss attributable to noncontrolling interests, Pre-Tax Amount	-1.6		0.9	0.5
Other comprehensive income (loss) attributable to Rock-Tenn Company shareholders, Pre-Tax Amount	333.2		-333.7	-322.1
Foreign currency translation (loss) gain, Tax	0		0	0.1
Net deferred loss on cash flow hedges, Tax	'		0.1	0.1
Reclassification adjustment of net loss on cash flow hedges included in earnings, Tax	'		-0.9	-2.9
Net actuarial gain (loss) arising during period, Tax	-119.8		140.8	124.8
Amortization of net actuarial loss, Tax	-15.1		-8.1	-6.7
Other Comprehensive Income (Loss), Pension and Other Postretirement Plans, Net Prior Service (Cost) Credit Arising During Period, Tax	-2		0.8	0
Amortization of prior service cost, Tax	-0.6		-0.3	-0.3
Other adjustments, Tax	4.2		'	'
Consolidated other comprehensive income (loss), Tax	-133.3		132.4	115.1
Less: Other comprehensive income (loss) attributable to noncontrolling interests, Tax	0		0	0
Other comprehensive income (loss) attributable to Rock-Tenn Company shareholders, Tax	-133.3		132.4	115.1
Foreign currency translation gain (loss), Net of Tax Amount	-15.1		18.3	-12.9
Net deferred loss on cash flow hedges, Net of Tax Amount	0		0	-0.3
Reclassification adjustment of net loss on cash flow hedges included in earnings, Net of Tax Amount	0		1.4	4
Net actuarial gain (loss) arising during period, Net of Tax Amount	184.1		-234.2	-211.2
Amortization of net actuarial loss, included in pension cost, Net of Tax Amount	24.2		13.3	12.2
Prior service credit (cost) arising during period, Net of Tax Amount	3.2		-1.4	0.3
Amortization of prior service cost, Net of Tax Amount	0.9		0.4	0.4
Other adjustments, Net of Tax Amount	4.2		0	0
Consolidated other comprehensive income (loss)	201.5		-202.2	-207.5
Less: Other comprehensive (income) loss attributable to noncontrolling interests, Net of Tax Amount	-1.6		0.9	0.5
Net current period other comprehensive income (loss)	$199.90	[1]	($201.30)	($207)
[1]	All amounts are net of tax and noncontrolling interest.

Inventories_Details

Inventories (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Millions, unless otherwise specified
Inventories [Abstract]	'	'
Finished goods and work in process	$370.90	$325.40
Raw materials	453.6	372.7
Supplies and spare parts	194	197.1
Inventories at FIFO cost	1,018.50	895.2
LIFO reserve	-80.6	-33.3
Net inventories	$937.90	$861.90

Acquisitions_Details

Acquisitions (Details) (USD $)

12 Months Ended

1 Months Ended

4 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

12 Months Ended

1 Months Ended

In Millions, except Per Share data, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2012

27-May-11

Sep. 30, 2011

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2013

Oct. 28, 2011

Jun. 22, 2012

Sep. 30, 2013

Sep. 30, 2012

Oct. 28, 2011

Jun. 22, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2011

Oct. 28, 2011

Oct. 28, 2011

Sep. 30, 2013

Sep. 30, 2011

Oct. 28, 2011

Oct. 28, 2011

Sep. 30, 2012

Sep. 30, 2012

27-May-11

Smurfit Stone [Member]

Smurfit Stone [Member]

Smurfit Stone [Member]

Smurfit Stone [Member]

Smurfit Stone [Member]

GMI [Member]

Mid South [Member]

Customer Relationships [Member]

Customer Relationships [Member]

Customer Relationships [Member]

Customer Relationships [Member]

Favorable Contracts [Member]

Favorable Contracts [Member]

Technology and Patents [Member]

Technology and Patents [Member]

Trademarks and Tradenames [Member]

Trademarks and Tradenames [Member]

Noncompete Agreements [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Amounts Recognized as of Acquisition Date (as adjusted) [Member]

Measurement Period Adjustments [Member]

Amounts Recognized As of Acquisition Date [Member]

Smurfit Stone [Member]

GMI [Member]

Mid South [Member]

Smurfit Stone [Member]

Smurfit Stone [Member]

Smurfit Stone [Member]

Smurfit Stone [Member]

Smurfit Stone [Member]

GMI [Member]

Customer Relationships [Member]

Smurfit Stone [Member]

GMI [Member]

Customer Relationships [Member]

Smurfit Stone [Member]

Smurfit Stone [Member]

Smurfit Stone [Member]

GMI [Member]

GMI [Member]

Business Acquisition [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Cost of Acquired Entity, Purchase Price Net of Cash Acquired

'

'

$4,919.10

'

'

'

'

$90.20

$32.10

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents

'

'

473.5

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Purchase Price Allocation, Cash Issued and Issuable, Net of Cash Acquired

'

'

1,303.40

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Common stock issued in acquisition

'

'

31

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock issued in acquisition

'

'

2,378.80

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Shares reserved for future issuance

'

'

0.7

'

0.7

'

0.2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt assumed in acquisition

'

'

1,180.50

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock options assumed

'

'

56.4

56.4

'

56.4

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Equity Interest Issued or Issuable, Per Share

'

'

$76.73

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Acquisition date

'

'

27-May-11

'

'

'

'

28-Oct-11

22-Jun-12

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Less Noncontrolling Interest [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Current assets, net of cash received

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,452.70

[1]

-6.8

[2]

1,459.50

[3]

Property, plant, and equipment

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4,379.30

[1]

-12.1

[2]

4,391.40

[3]

Goodwill

1,862.10

1,865.30

'

'

'

'

'

25

8.5

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,080.70

[1]

-10.9

[2]

1,091.60

[3]

Intangible assets

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

713.1

[1]

21.7

[2]

691.4

[3]

Other long-term assets

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

114.5

[1]

19

[2]

95.5

[3]

Total assets acquired

'

'

'

7,729.40

'

7,729.40

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

7,740.30

[1]

10.9

[2]

7,729.40

[3]

Current portion of debt

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

9.4

[1]

0

[2]

9.4

[3]

Current liabilities

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

823.3

[1]

6.6

[2]

816.7

[3]

Long-term debt due after one year

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,171.10

[1]

0

[2]

1,171.10

[3]

Accrued pension and other long-term benefits

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,201.70

[1]

-4.1

[2]

1,205.80

[3]

Noncontrolling interest and other long-term liabilities

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

796.2

[1]

8.4

[2]

787.8

[3]

Total liabilities and noncontrolling interests assumed

'

'

'

-3,990.80

'

-3,990.80

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4,001.70

[1]

10.9

[2]

3,990.80

[3]

Net assets acquired

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3,738.60

[1]

0

[2]

3,738.60

[3]

Business Acquisition, Purchase Price Allocation, Unfavorable Contract Accrual

'

'

'

'

'

'

'

2.1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Weighted Average Life

'

'

'

'

'10 years 2 months

'

'

'

'

'

'10 years 6 months

'

'12 years 6 months

'

'6 years 11 months

'

'8 years

'

'3 years 6 months

'2 years

'

'

'

'

'

'

'

'

'

'

'

Finite-Lived Intangible Assets, Useful Life

'12 years 5 months

'

'

'

'

'

'

'

'

'11 years 10 months

'

'

'

'11 years 10 months

'

'8 years

'

'33 years 11 months

'

'

'40 years

'18 years

'

'12 years

'2 years

'1 year

'

'11 years

'

'

'

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles

'

'

'

'

713.1

'

'

'

'

'

663

39.5

9.9

'

23.5

'

13.3

'

10.3

3

'

'

'

'

'

'

'

'

'

'

'

Unfavorable Lease Contracts, Useful Live, Minimum

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'2 years

'

'

'

'

Unfavorable Lease Contracts, Useful Live, Maximum

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'10 years

'

'

'

'

'

'

'

'

Business Acquisition, Pro Forma Information [Abstract]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net sales

'

'

'

'

'

9,574.50

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net income attirbutable to Rock-Tenn Company shareholders

'

'

'

'

'

341.1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual

'

'

'

2,273.70

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Pro Forma Information, Nonrecurring Expense, Inventory Step Up

'

'

'

'

'

59.4

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Pro Forma Information, Nonrecurring Expense, Employee Compensation Related Costs

'

'

'

'

'

97.8

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Pro Forma Information, Nonrecurring Expense, Acquisition Costs

'

'

'

'

'

48.2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Pro Forma Information, Nonrecurring Expense, Loss on Extinguishment of Debt

'

'

'

'

'

81.5

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Pro Forma Information, Integration Related Costs

'

'

'

'

'

$35.90

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

[1]

The measurement period adjustments were due primarily to refinements of third party appraisals related to certain property, plant and equipment and intangible assets and related estimated useful lives as well as adjustments to certain tax accounts based on among other things, adjustments to deferred tax liabilities including the recent appraisal adjustments, analysis of the tax basis of acquired assets and liabilities and other tax adjustments. The net impact of the measurement period adjustments resulted in a net decrease to goodwill.

[2]

The measurement period adjustments recorded in fiscal 2012 did not have a significant impact on our condensed consolidated statements of income for any period of fiscal 2012 or 2011. In addition, these adjustments did not have a significant impact on our condensed consolidated balance sheet as of September 30, 2011. Therefore, we recorded the cumulative impact in fiscal 2012 and did not retrospectively adjust the comparative 2011 financial information presented herein.

[3]

As previously reported in the Notes to Consolidated Financial Statements included in our Fiscal 2011 Form 10-K.

Restructuring_and_Other_Costs_2

Restructuring and Other Costs, Net (Details) (USD $)

3 Months Ended

12 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

$26

$23.50

$12.40

$16.10

$23.10

$13.70

$28.10

$10.30

$78

$75.20

$93.30

Restructuring and Other Costs, Net, Noncash

'

'

'

'

'

'

'

'

18.6

14.8

17.7

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

252.6

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

258.2

'

'

Acquisition Expense / (Income)

'

'

'

'

'

'

'

'

-3.6

2.9

20.2

Integration expenses

'

'

'

'

'

'

'

'

22.8

23

20.2

Net Property, Plant and Equipment [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

18.6

[1]

14.8

[1]

17.7

[1]

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

54.8

[1]

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

54.8

[1]

'

'

Employee severance and other EE costs [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

25.5

11

10.1

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

47.9

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

47.9

'

'

Equipment and Inventory Relocation Costs [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

5.4

4.1

2.1

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

11.7

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

13.2

'

'

Facility Closing [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

5.7

5.9

1.9

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

13.7

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

17.7

'

'

Other Costs Related to Restructuring and Other Costs [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

22.8

39.4

61.5

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

124.5

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

124.6

'

'

Corrugated Packaging [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

43.5

[2]

40.9

[2]

27.5

[2]

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

112.9

[2]

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

117.3

[2]

'

'

Corrugated Packaging [Member] | Net Property, Plant and Equipment [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

10.4

[1],[2]

16.6

[1],[2]

16.7

[1],[2]

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

44.1

[1],[2]

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

44.1

[1],[2]

'

'

Corrugated Packaging [Member] | Employee severance and other EE costs [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

23.5

[2]

10.5

[2]

7.8

[2]

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

42.3

[2]

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

42.3

[2]

'

'

Corrugated Packaging [Member] | Equipment and Inventory Relocation Costs [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

5

[2]

3.5

[2]

1.2

[2]

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

9.7

[2]

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

10.9

[2]

'

'

Corrugated Packaging [Member] | Facility Closing [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

4.7

[2]

5.6

[2]

1.1

[2]

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

11.4

[2]

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

14.6

[2]

'

'

Corrugated Packaging [Member] | Other Costs Related to Restructuring and Other Costs [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

-0.1

[2]

4.7

[2]

0.7

[2]

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

5.4

[2]

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

5.4

[2]

'

'

Consumer Packaging [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

3.5

[3]

-2.4

[3]

5.1

[3]

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

11

[3]

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

11

[3]

'

'

Consumer Packaging [Member] | Net Property, Plant and Equipment [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

2.6

[1],[3]

-3.4

[1],[3]

1

[1],[3]

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

3.4

[1],[3]

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

3.4

[1],[3]

'

'

Consumer Packaging [Member] | Employee severance and other EE costs [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

0.6

[3]

0.2

[3]

2.3

[3]

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

3.9

[3]

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

3.9

[3]

'

'

Consumer Packaging [Member] | Equipment and Inventory Relocation Costs [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

0.1

[3]

0.6

[3]

0.9

[3]

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

1.7

[3]

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

1.7

[3]

'

'

Consumer Packaging [Member] | Facility Closing [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

0.2

[3]

0.2

[3]

0.7

[3]

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

1.1

[3]

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

1.1

[3]

'

'

Consumer Packaging [Member] | Other Costs Related to Restructuring and Other Costs [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

0

[3]

0

[3]

0.2

[3]

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

0.9

[3]

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

0.9

[3]

'

'

Recycling [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

10.3

[4]

2.3

[4]

0.1

[4]

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

13

[4]

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

14.2

[4]

'

'

Recycling [Member] | Net Property, Plant and Equipment [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

5.5

[1],[4]

1.6

[1],[4]

0

[1],[4]

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

7.2

[1],[4]

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

7.2

[1],[4]

'

'

Recycling [Member] | Employee severance and other EE costs [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

1.2

[4]

0.3

[4]

0

[4]

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

1.5

[4]

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

1.5

[4]

'

'

Recycling [Member] | Equipment and Inventory Relocation Costs [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

0.2

[4]

0

[4]

0

[4]

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

0.2

[4]

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

0.5

[4]

'

'

Recycling [Member] | Facility Closing [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

0.8

[4]

0.1

[4]

0.1

[4]

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

1.2

[4]

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

2

[4]

'

'

Recycling [Member] | Other Costs Related to Restructuring and Other Costs [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

2.6

[4]

0.3

[4]

0

[4]

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

2.9

[4]

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

3

[4]

'

'

All Other Segments [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

20.7

[5]

34.4

[5]

60.6

[5]

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

115.7

[5]

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

115.7

[5]

'

'

Acquisition Expense / (Income)

'

'

'

'

'

'

'

'

-3.6

2.9

20.2

Integration expenses

'

'

'

'

'

'

'

'

23.9

32.1

40.4

Restructuring and Other Costs, Net, Other Costs

'

'

'

'

'

'

'

'

0.4

-0.6

0

All Other Segments [Member] | Net Property, Plant and Equipment [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

0.1

[1],[5]

0

[1],[5]

0

[1],[5]

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

0.1

[1],[5]

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

0.1

[1],[5]

'

'

All Other Segments [Member] | Employee severance and other EE costs [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

0.2

[5]

0

[5]

0

[5]

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

0.2

[5]

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

0.2

[5]

'

'

All Other Segments [Member] | Equipment and Inventory Relocation Costs [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

0.1

[5]

0

[5]

0

[5]

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

0.1

[5]

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

0.1

[5]

'

'

All Other Segments [Member] | Facility Closing [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

0

[5]

0

[5]

0

[5]

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

0

[5]

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

0

[5]

'

'

All Other Segments [Member] | Other Costs Related to Restructuring and Other Costs [Member]

'

'

'

'

'

'

'

'

'

'

'

Restructuring Cost and Reserve [Line Items]

'

'

'

'

'

'

'

'

'

'

'

Restructuring and other costs, net

'

'

'

'

'

'

'

'

20.3

[5]

34.4

[5]

60.6

[5]

Restructuring and Related Cost, Cost Incurred to Date

'

'

'

'

'

'

'

'

115.3

[5]

'

'

Restructuring and Related Cost, Expected Cost

'

'

'

'

'

'

'

'

$115.30

[5]

'

'

[1]

“Net property, plant and equipment” as used in this Note 6 is the sum of property, plant and equipment impairment losses, subsequent adjustments to fair value for assets classified as held for sale, subsequent (gains) or losses on sales of property, plant and equipment, related parts and supplies, and accelerated depreciation on such assets.

[2]

The Corrugated Packaging segment current year charges are primarily associated with the closure of seven corrugated container plants acquired in the Smurfit-Stone Acquisition, on-going closure costs at previously closed facilities including the Matane, Quebec containerboard mill also acquired in the Smurfit-Stone Acquisition which were partially offset by gains on sale of previously closed facilities. The Corrugated Packaging segment charges in fiscal 2012 primarily reflect the closure of our Matane, Quebec containerboard mill, a machine taken out of operation at our Hodge, LA containerboard mill and seven corrugated container plants, all acquired in the Smurfit-Stone Acquisition and charges associated primarily with on-going closure costs at previously closed corrugated container plants acquired in the Smurfit-Stone Acquisition and our legacy Hauppauge, NY sheet plant, net of a gain on sale in fiscal 2012 primarily for our Santa Fe Springs, CA corrugated converting facility. The Corrugated Packaging Segment charges in fiscal 2011 primarily reflect the closure of six corrugated container plants also acquired in the Smurfit-Stone Acquisition. The fiscal 2012 expenses in the “Other Costs” column primarily represent repayment of energy credits and site environmental closure activities at the Matane mill. The cumulative charges primarily reflect charges associated with the closure of twenty corrugated container plants acquired in the Smurfit-Stone Acquisition, the closure of the Matane, Quebec containerboard mill, charges related to kraft paper assets at our Hodge containerboard mill we acquired in the Smurfit-Stone Acquisition, and gains and losses associated with the sale of closed facilities. We have transferred a substantial portion of each closed facility's production to our other facilities.

[3]

The Consumer Packaging segment current year charges are primarily associated with the closure of a converting facility and on-going closure costs for previously closed facilities. The Consumer Packaging segment charges in fiscal 2012 primarily reflect the gain on sale of our Columbus, IN laminated paperboard converting operation and Milwaukee, WI folding carton facility and on-going closure costs associated with previously closed facilities. The Consumer Packaging segment charges in fiscal 2011 primarily reflect the closure of two facilities and on-going closure costs for previously closed facilities. The cumulative charges primarily reflect the actions mentioned above as well as closure costs at certain of five interior packaging plants. We have transferred a substantial portion of each closed facility's production to our other facilities.

[4]

The Recycling segment current year charges are primarily associated with the closure of nine collection facilities acquired in the Smurfit-Stone Acquisition partially offset by the gain on sale of our Dallas, TX collection facility. The Recycling segment charges in fiscal 2012 primarily reflect the closure of six collection facilities also acquired in the Smurfit-Stone Acquisition and the cumulative charges reflect the preceding actions as well as carrying costs for two collections facilities shutdown in a prior year.

[5]

The expenses in the “Other” segment primarily reflect costs that we consider as Corporate, including the “Other Costs” column which primarily reflects costs incurred as a result of our Smurfit-Stone Acquisition, including merger integration expenses. Also included in the “Other” segment are insignificant costs related to our Merchandising Displays segment. The pre-tax charges are summarized below (in millions): AcquisitionExpense / (Income) IntegrationExpenses Other Expense (Income) TotalFiscal 2013$(3.6) $23.9 $0.4 $20.7Fiscal 20122.9 32.1 (0.6) 34.4Fiscal 201120.2 40.4 — 60.6Acquisition expenses include expenses associated with acquisitions, whether consummated or not, as well as litigation expenses associated with the Smurfit-Stone Acquisition, net of recoveries. Acquisition expenses primarily consist of advisory, legal, accounting, valuation and other professional or consulting fees. Integration expenses reflect primarily severance and other employee costs, professional services including work being performed to facilitate the Smurfit-Stone integration including information systems integration costs, lease expense and other costs. Due to the complexity and duration of the integration activities the precise amount expected to be incurred has not been quantified above. We expect integration activities to continue into fiscal 2014.

Restructuring_and_Other_Costs_3

Restructuring and Other Costs, Net Restructuring Accrual (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Restructuring Cost and Reserve [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Restructuring and Other Costs Reserve	$21.80	'	'	'	$22.70	'	'	'	$21.80	$22.70	$26.70
Restructuring and other costs, net	26	23.5	12.4	16.1	23.1	13.7	28.1	10.3	78	75.2	93.3
Restructuring Reserve [Roll Forward]	'	'	'	'	'	'	'	'	'	'	'
Accrual at beginning of period	'	'	'	22.7	'	'	'	26.7	22.7	26.7	1.4
Accruals acquired in Smurfit-Stone Acquisition	'	'	'	'	'	'	'	'	0	0	9.2
Additional accruals	'	'	'	'	'	'	'	'	18.7	26.9	30.8
Payments	'	'	'	'	'	'	'	'	-20.6	-28	-14.4
Adjustment to accruals	'	'	'	'	'	'	'	'	1	-2.9	-0.3
Accrual at end of period	$21.80	'	'	'	$22.70	'	'	'	$21.80	$22.70	$26.70

Restructuring_and_Other_Costs_4

Restructuring and Other Costs, Net Restructuring Costs (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Restructuring Cost and Reserve [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Additional accruals and adjustments to accruals (see table above)	'	'	'	'	'	'	'	'	$19.70	$24	$30.50
Acquisition (income) expenses	'	'	'	'	'	'	'	'	-3.6	2.9	20.2
Integration expenses	'	'	'	'	'	'	'	'	22.8	23	20.2
Net property, plant and equipment	'	'	'	'	'	'	'	'	18.6	14.8	17.7
Severance and other employee costs	'	'	'	'	'	'	'	'	10.1	0.6	0.3
Equipment relocation	'	'	'	'	'	'	'	'	5.4	4.1	2.1
Facility carrying costs	'	'	'	'	'	'	'	'	5.7	5.9	1.9
Other	'	'	'	'	'	'	'	'	-0.7	-0.1	0.4
Total restructuring and other costs, net	$26	$23.50	$12.40	$16.10	$23.10	$13.70	$28.10	$10.30	$78	$75.20	$93.30

Other_Intangible_Assets_Detail

Other Intangible Assets (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Finite-Lived Intangible Assets [Line Items]	'	'	'
Weighted Average Life	'12 years 5 months	'	'
Gross Carrying Amount	$960.80	$981.70	'
Accumulated Amortization	-261.4	-186.6	'
Finite-Lived Intangible Assets, Amortization Expense	80.7	88.9	42.4
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]	'	'	'
Fiscal 2014	85.4	'	'
Fiscal 2015	81.5	'	'
Fiscal 2016	80.9	'	'
Fiscal 2017	80.7	'	'
Fiscal 2018	80.6	'	'
Customer Relationships [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Weighted Average Life	'11 years 10 months	'	'
Gross Carrying Amount	876.5	873.9	'
Accumulated Amortization	-230.4	-153.6	'
Favorable Contracts [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Weighted Average Life	'11 years 10 months	'	'
Gross Carrying Amount	23.9	42.2	'
Accumulated Amortization	-14.3	-18.8	'
Technology and Patents [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Weighted Average Life	'8 years	'	'
Gross Carrying Amount	14.3	14.3	'
Accumulated Amortization	-4.8	-3.2	'
Trademarks and Trade Names [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Weighted Average Life	'33 years 11 months	'	'
Gross Carrying Amount	30.2	30.3	'
Accumulated Amortization	-9.8	-6.4	'
Noncompete Agreements [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Gross Carrying Amount	0	5.1	'
Accumulated Amortization	0	-4.1	'
Licensing Agreements [Member]	'	'	'
Finite-Lived Intangible Assets [Line Items]	'	'	'
Weighted Average Life	'10 years 0 months	'	'
Gross Carrying Amount	15.9	15.9	'
Accumulated Amortization	($2.10)	($0.50)	'

Debt_Details

Debt (Details) (USD $)

3 Months Ended

12 Months Ended

3 Months Ended

0 Months Ended

12 Months Ended

12 Months Ended

48 Months Ended

72 Months Ended

12 Months Ended

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2013

Aug. 30, 2013

Dec. 21, 2012

Sep. 30, 2012

27-May-11

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Mar. 22, 2013

Mar. 22, 2013

Mar. 22, 2013

Mar. 22, 2013

Sep. 30, 2013

Sep. 30, 2012

Feb. 22, 2012

Dec. 31, 2009

Sep. 30, 2013

Sep. 30, 2012

Mar. 31, 2003

Sep. 30, 2013

Sep. 30, 2012

Sep. 11, 2012

Sep. 30, 2013

Sep. 30, 2012

Feb. 22, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 11, 2012

3-May-13

Sep. 27, 2012

Sep. 30, 2013

Sep. 27, 2012

Sep. 30, 2013

Sep. 27, 2012

Jun. 07, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 27, 2017

Sep. 27, 2017

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Secured Debt [Member]

Secured Debt [Member]

Secured Debt [Member]

Secured Debt [Member]

Secured Debt [Member]

Letter of Credit [Member]

Canadian Dollar Borrowing [Member]

Canadian Dollar Borrowing [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Line of Credit [Member]

Line of Credit [Member]

Notes Payable, Other Payables [Member]

Notes Payable, Other Payables [Member]

Maximum [Member]

Minimum [Member]

Date-2013-09-30 [Member]

Date-2013-09-30 [Member]

Date-2013-09-30 [Member]

LIBOR-based and Banker's Acceptance Advances [Member]

LIBOR-based and Banker's Acceptance Advances [Member]

LIBOR-based and Banker's Acceptance Advances [Member]

Base Rate [Member]

Base Rate [Member]

Base Rate [Member]

Receivables Facility [Member]

Receivables Facility [Member]

Receivables Facility [Member]

Receivables Facility [Member]

Receivables Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Exchange March 2019 Notes [Member]

Exchange March 2020 Notes [Member]

Exchange March 2022 Notes [Member]

Exchange March 2023 Notes [Member]

March 2019 Notes [Member]

March 2019 Notes [Member]

March 2019 Notes [Member]

March 2013 Notes [Member]

March 2013 Notes [Member]

March 2013 Notes [Member]

March 2013 Notes [Member]

March 2020 Notes [Member]

March 2020 Notes [Member]

March 2020 Notes [Member]

March 2022 Notes [Member]

March 2022 Notes [Member]

March 2022 Notes [Member]

March 2023 Notes [Member]

March 2023 Notes [Member]

March 2023 Notes [Member]

Credit Facility [Member]

Credit Facility [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Term Loan Facility [Member]

Term Loan Facility [Member]

Future Mexican Peso Sub-Facility [Member]

Term Loan Facilities [Member]

Term Loan Facilities [Member]

Revolving Credit Facility [Member]

Revolving Credit Facility [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Credit Facility [Member]

Credit Facility [Member]

Credit Facility [Member]

Unsecured Debt [Member]

Maximum [Member]

Minimum [Member]

Unsecured Debt [Member]

Maximum [Member]

Minimum [Member]

years

years

Credit Facility [Member]

Credit Facility [Member]

Revolver and Term Loan Facility [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Revolver and Term Loan Facility [Member]

Unsecured Debt [Member]

Unsecured Debt [Member]

Revolver and Term Loan Facility [Member]

Revolver and Term Loan Facility [Member]

Revolver and Term Loan Facility [Member]

Revolver and Term Loan Facility [Member]

Debt Instrument [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt

$2,844,800,000

'

'

'

$3,412,500,000

'

'

'

$2,844,800,000

$3,412,500,000

'

$260,000,000

[1]

'

'

$410,000,000

[1]

'

'

'

'

'

'

'

'

$349,700,000

[2]

$349,700,000

[2]

'

'

$0

[3]

$80,600,000

[3]

'

$347,500,000

[4]

$347,100,000

[4]

'

$399,400,000

[2]

$399,300,000

[2]

'

$346,600,000

[4]

$346,300,000

[4]

'

'

'

'

'

'

'

'

$947,500,000

[5]

$1,222,600,000

[5]

$184,300,000

[5]

$242,300,000

[5]

$9,800,000

$14,600,000

'

'

'

'

'

'

'

'

'

'

'

Current portion of debt

2,900,000

'

'

'

261,300,000

'

'

'

2,900,000

261,300,000

'

'

'

'

51,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt due after one year

2,841,900,000

'

'

'

3,151,200,000

'

'

'

2,841,900,000

3,151,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Amortization of Financing Costs

'

'

'

'

'

'

'

'

10,200,000

10,800,000

7,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4.45%

'

'

'

5.63%

'

'

3.50%

'

'

4.90%

'

'

4.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Face Amount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

350,000,000

350,000,000

399,000,000

350,000,000

'

'

350,000,000

'

'

'

100,000,000

'

'

350,000,000

'

'

400,000,000

'

'

350,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Extinguishment of Debt, Amount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

19,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Gain (loss) on extinguishment of debt

0

0

-100,000

-200,000

-6,300,000

-100,000

-19,500,000

0

-300,000

-25,900,000

-39,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Interest Rate, Effective Percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

4.59%

'

'

'

'

'

'

3.72%

'

'

5.01%

'

'

4.18%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Repayments of Other Debt

'

'

'

'

'

'

'

'

787,400,000

1,803,600,000

1,966,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Senior Notes Repurchased During Period, Percentage of Par

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

98.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Unamortized Discount

6,800,000

'

'

'

'

'

'

'

6,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

300,000

'

'

'

'

'

'

3,000,000

'

'

800,000

'

'

3,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deferred Finance Costs, Current, Gross

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3,000,000

'

'

'

800,000

'

'

2,900,000

'

'

3,500,000

'

'

3,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Credit Facility, maximum borrowing capacity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

300,000,000

300,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,700,000,000

'

1,475,000,000

'

1,223,000,000

200,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Term, in Years

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5

'

5

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum Permitted Debt Leverage Ratio

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

350.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Decrease in Applicable Percentage, Basis Points

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

25

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Capacity available for special purpose

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

250,000,000

350,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Letters of credit outstanding, amount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

48,600,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of credit facility, remaining borrowing capacity

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1,200,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Applicable margin

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.25%

1.75%

1.13%

0.25%

0.75%

0.13%

Facility commitment

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.20%

'

'

'

'

'

'

'

'

'

'

0.30%

0.18%

'

'

'

'

'

'

'

'

'

Interest rate

'

'

'

'

'

'

'

'

'

'

'

0.95%

'

'

1.34%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.43%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Minimum interest rate on revolving credit facility

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.55%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Maximum interest rate on revolving credit facility

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Leverage Ratio, Maximum

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

375.00%

350.00%

'

'

'

'

'

'

'

Interest Coverage Ratio, Minimum

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

350.00%

'

'

'

'

'

'

Receivables backed financing, maximum borrowing amount

'

'

'

'

'

'

'

'

'

'

'

'

'

700,000,000

'

625,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restriction on Exclusion of Eligible Receivables of Specific Obligors, Aggregate Maximum Percentage

'

'

'

'

'

'

'

'

'

'

'

'

7.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restriction on Exclusion of Eligible Receivables of Specific Obligors, Obligor Maximum Percentage of Aggregate Balance

'

'

'

'

'

'

'

'

'

'

'

'

2.50%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Asset Securitization Facility Commitment Fee Percentage

'

'

'

'

'

'

'

'

'

'

'

0.25%

'

'

0.30%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Maximum Borrowing Capacity, Amount

'

'

'

'

'

'

'

'

'

'

'

700,000,000

'

'

464,000,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Loans and Leases Receivable, Collateral for Secured Borrowings

'

'

'

'

'

'

'

'

'

'

'

942,500,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fiscal 2014

2,900,000

'

'

'

'

'

'

'

2,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fiscal 2015

91,800,000

'

'

'

'

'

'

'

91,800,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fiscal 2016

382,300,000

'

'

'

'

'

'

'

382,300,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fiscal 2017

917,900,000

'

'

'

'

'

'

'

917,900,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Fiscal 2018

0

'

'

'

'

'

'

'

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Thereafter

$1,456,700,000

'

'

'

'

'

'

'

$1,456,700,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

[1]

On December 21, 2012, we amended and increased the Receivables Facility from $625.0 million to $700.0 million, extended the maturity date from the third anniversary of the May 27, 2011 Smurfit-Stone Acquisition to December 18, 2015, and amended, among other things, certain restrictions on what constitutes eligible receivables under the facility and lowered borrowing costs. Except for $51.0 million classified as short-term at September 30, 2012 that was expected to require the use of current assets for repayment, the borrowings are classified as long-term at September 30, 2013 and September 30, 2012. On August 30, 2013, we amended our Receivables Facility to allow for the exclusion of eligible receivables of specific obligors each calendar year subject to the following restrictions: (i) the aggregate of excluded receivables may not exceed 7.5% of eligible receivables under the Receivables Facility, and (ii) the excluded receivables of each obligor may not exceed 2.5% of the aggregate outstanding balance. The borrowing rate, which consists of a blend of the market rate for asset-backed commercial paper and the one month LIBOR rate plus a utilization fee, was 0.95% and 1.34% as of September 30, 2013 and September 30, 2012, respectively. The commitment fee for this facility was 0.25% and 0.30% as of September 30, 2013 and September 30, 2012, respectively. Borrowing availability under this facility is based on the eligible underlying accounts receivable and certain covenants. The agreement governing the Receivables Facility contains restrictions, including, among others, on the creation of certain liens on the underlying collateral. We test and report our compliance with these covenants monthly. We are in compliance with all of our covenants. At September 30, 2013 and September 30, 2012, maximum available borrowings, excluding amounts outstanding, under this facility were approximately $700.0 million and $464.0 million, respectively. The carrying amount of accounts receivable collateralizing the maximum available borrowings at September 30, 2013 was approximately $942.5 million. We have continuing involvement with the underlying receivables as we provide credit and collections services pursuant to the securitization agreement.

[2]

On February 22, 2012, we issued $350.0 million aggregate principal amount of 4.45% senior notes due March 2019 (“March 2019 Notes”) and issued $400.0 million aggregate principal amount of 4.90% senior notes due March 2022 (“March 2022 Notes”) in an unregistered offering pursuant to Rule 144A and Regulation S under the Securities Act. We issued the March 2019 Notes and March 2022 Notes at a discount of approximately $0.3 million and $0.8 million, respectively, and recorded debt issuance costs, including the exchange offer, of approximately $3.0 million and $3.5 million respectively, which are being amortized over the respective term of the notes. Giving effect to the amortization of the original issue discount and the debt issuance costs, the effective interest rates of the March 2019 Notes and March 2022 Notes are approximately 4.59% and 5.01%, respectively.

[3]

In March 2003, we sold $100.0 million in aggregate principal amount of our 5.625% notes due March 2013 (“March 2013 Notes”). We incurred debt issuance costs of approximately $0.8 million which were amortized over the term of the notes. In the first quarter of fiscal 2010, we repurchased $19.5 million of our March 2013 Notes at an average price of approximately 98% of par and recorded an aggregate gain on extinguishment of debt of approximately $0.5 million. On March 15, 2013, we repaid our remaining March 2013 Notes upon maturity.

[4]

On September 11, 2012, we issued $350.0 million aggregate principal amount of 3.50% senior notes due March 2020 (“March 2020 Notes”) and issued $350.0 million aggregate principal amount of 4.00% senior notes due March 2023 (“March 2023 Notes”) in an unregistered offering pursuant to Rule 144A and Regulation S under the Securities Act. We issued the March 2020 and March 2023 notes at a discount of approximately $3.0 million and $3.7 million, respectively, and recorded debt issuance costs, including the exchange offer, of approximately $2.9 million and $3.0 million, respectively, which are being amortized over the respective term of the notes. Giving effect to the amortization of the original issue discount and the debt issuance costs, the effective interest rates of the March 2020 and March 2023 Notes are approximately 3.72% and 4.18%, respectively.

[5]

On September 27, 2012, we entered into an unsecured Amended and Restated Credit Agreement with an original maximum principal amount of approximately $2.7 billion before scheduled payments. The Credit Facility includes a $1.475 billion, 5-year revolving credit facility and a $1.223 billion, 5-year term loan facility. All obligations under the Credit Facility are fully and unconditionally guaranteed by our existing and future wholly-owned U.S. subsidiaries, except for certain present and future unrestricted subsidiaries and certain other limited exceptions. In addition, the obligations of Rock-Tenn Company of Canada, Inc. are guaranteed by Rock-Tenn Company and all such wholly-owned U.S. subsidiaries, as well as by wholly-owned Canadian subsidiaries of RockTenn, other than certain present and future unrestricted subsidiaries and certain other limited exceptions.In December 2012, in connection with the amendment of our receivables-backed financing facility, we prepaid our term loan facility through December 2014 with borrowings under our Receivables Facility, our revolving credit facility and available cash. Effective May 3, 2013, we exercised the Leverage Reduction Option which reduced our maximum permitted Leverage Ratio to 3.5 times and decreased our Applicable Percentage 25 basis points (each as defined in the Credit Facility). On June 7, 2013, we amended the Credit Facility to, among other things, modified the EBITDA definition, including but not limited to, allowing for add backs associated with proactive pension actions, synergies associated with future acquisitions and certain business interruptions covered by third parties and permitted a future $200 million Mexican peso sub-facility with dollar for dollar reduction to existing commitments if activated. Up to $250.0 million under the revolving credit facility may be used for the issuance of letters of credit. In addition, up to $350.0 million of the revolving credit facility may be used to fund borrowings in Canadian dollars. At September 30, 2013 and September 30, 2012, the amount committed under the credit facilities for loans to a Canadian subsidiary was $300.0 million and $300.0 million, respectively. At September 30, 2013, available borrowings under the revolving credit portion of the Credit Facility, reduced by certain outstanding letters of credit not drawn upon of approximately $48.6 million and the application of our maximum leverage ratio subject to the facility limit, exceeded $1.2 billion.At our option, borrowings under the Credit Facility bear interest at either a base rate or at the London Interbank Offered Rate (“LIBOR”), plus, in each case, an applicable margin. In addition, advances in Canadian dollars may be made by way of purchases of bankers' acceptances. We are required to pay fees in respect of outstanding letters of credit at a rate equal to the applicable margin for LIBOR-based borrowings based upon a Credit Agreement Leverage Ratio. The following table summarizes the applicable margins and percentages related to the revolving credit facility and term loan of the Credit Facility: Range September 30, 2013Applicable margin/percentage for determining: LIBOR-based loans and banker's acceptance advances interest rate (1)1.125%-1.750% 1.25%Base rate-based borrowings (1)0.125%-0.750% 0.25%Facility commitment (2)0.175%-0.300% 0.20%(1) The rates vary based on our Leverage Ratio, as defined in the Amended and Restated Credit Agreement.(2) Applied to the aggregate borrowing availability based on the Leverage Ratio, as defined below.Following the submission of our September 30, 2013 quarterly officer's compliance certificate when our Form 10-K is filed, our applicable margins in the table above will fall for each measure to the low end of the range. The variable interest rate, including the applicable margin, on our term loan facility was 1.43% at September 30, 2013. Interest rates on our revolving credit facility for borrowings both in the U.S. and Canada ranged from 2.55% to 3.50% at September 30, 2013.The Credit Facility contains certain prepayment requirements and customary affirmative and negative covenants. The negative covenants include covenants that, subject to certain exceptions, contain: limitations on liens and further negative pledges; limitations on sale-leaseback transactions; limitations on debt and prepayments, redemptions or repurchases of certain debt and equity; limitations on mergers and asset sales; limitations on sales, transfers and other dispositions of assets; limitations on loans and certain other investments; limitations on restrictions affecting subsidiaries; limitations on transactions with affiliates; limitations on changes to accounting policies or fiscal periods; limitations on speculative hedge transactions; and restrictions on modification or waiver of material documents in a manner materially adverse to the lenders.In addition, the Credit Facility includes financial covenants requiring that we maintain a maximum total leverage ratio and minimum interest coverage ratio. The terms of the Credit Facility, prior to us exercising the Leverage Reduction Option on May 3, 2013 which reduced our maximum permitted Leverage Ratio to 3.5 times, required us to maintain a leverage ratio (which is the ratio of our total funded debt less certain amounts of unrestricted cash, to Credit Agreement EBITDA, as defined, for the preceding four fiscal quarters “Leverage Ratio”) of not greater than 3.75 to 1.00 for fiscal quarters ending from September 30, 2012 through September 30, 2013, and not greater than 3.50 to 1.00 for fiscal quarters ending thereafter. In addition, we must maintain an interest coverage ratio (which is the ratio of Credit Agreement EBITDA for the preceding four fiscal quarters to cash interest expense for such period) of not less than 3.50 to 1.00 for any fiscal quarters ending on or after September 30, 2012. Credit Agreement EBITDA is calculated in accordance with the definition contained in our Amended and Restated Credit Agreement. Credit Agreement EBITDA is generally defined as consolidated net income of RockTenn for any fiscal period plus the following to the extent such amounts are deducted in determining such consolidated net income: (i) consolidated interest expense, (ii) consolidated tax expenses, (iii) depreciation and amortization expenses, (iv) financing expenses and write-offs, including remaining portions of original issue discount on prepayment of indebtedness, prepayment premiums and commitment fees, (v) inventory expenses associated with the write up of Smurfit-Stone inventory acquired in the merger and other permitted acquisitions, (vi) all other non-cash charges, (vii) all legal, accounting and professional advisory expenses incurred in respect of the Smurfit-Stone Acquisition and other permitted acquisitions and related financing transactions, (vii) certain expenses and costs incurred in connection with the Smurfit-Stone Acquisition and associated synergies, restructuring charges, and certain other charges and expenses, subject to certain limitations specified in the Credit Facility, (viii) certain other charges and expenses unrelated to the Smurfit-Stone Acquisition subject to certain specified limitations in the Credit Facility, and (ix) for certain periods, run-rate synergies expected to be achieved due to the Smurfit-Stone Acquisition not already included in EBITDA and adjustments to include Smurfit-Stone EBITDA as outlined in the Amended and Restated Credit Agreement related to periods prior to the acquisition (“Credit Agreement EBITDA”). We test and report our compliance with these covenants each quarter. We are in compliance with all of our covenants.The credit facilities also contain certain customary events of default, including relating to non-payment, breach of representations, warranties or covenants, default on other material debt, bankruptcy and insolvency events, invalidity or impairment of loan documentation, collateral or subordination provisions, change of control and customary ERISA defaults. The term “ERISA” means the Employee Retirement Income Security Act of 1974, as amended, and the rules and regulations thereunder.

Fair_Value_Fair_Value_by_Balan

Fair Value Fair Value by Balance Sheet Grouping (Details) (USD $)	Sep. 30, 2013		Sep. 30, 2012
In Millions, unless otherwise specified
Fair Value [Member]	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Fair value of debt	$2,869.10		$3,496.60
Carrying Amount [Member]	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Fair value of debt	2,844.80		3,412.50
Notes Payable, Other Payables [Member] | Fair Value [Member]	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Fair value of debt	10.1	[1],[2]	15.4	[1],[2]
Notes Payable, Other Payables [Member] | Carrying Amount [Member]	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Fair value of debt	9.8		14.6
March 2013 Notes [Member] | Unsecured Debt [Member] | Fair Value [Member]	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Fair value of debt	0	[3]	81.7	[3]
March 2013 Notes [Member] | Unsecured Debt [Member] | Carrying Amount [Member]	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Fair value of debt	0		80.6
March 2019 Notes [Member] | Unsecured Debt [Member] | Fair Value [Member]	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Fair value of debt	371.9	[3]	376.6	[3]
March 2019 Notes [Member] | Unsecured Debt [Member] | Carrying Amount [Member]	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Fair value of debt	349.7		349.7
March 2020 Notes [Member] | Unsecured Debt [Member] | Fair Value [Member]	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Fair value of debt	343	[3]	356.3	[3]
March 2020 Notes [Member] | Unsecured Debt [Member] | Carrying Amount [Member]	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Fair value of debt	347.5		347.1
March 2022 Notes [Member] | Unsecured Debt [Member] | Fair Value [Member]	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Fair value of debt	413.7	[3]	434	[3]
March 2022 Notes [Member] | Unsecured Debt [Member] | Carrying Amount [Member]	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Fair value of debt	399.4		399.3
March 2023 Notes [Member] | Unsecured Debt [Member] | Fair Value [Member]	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Fair value of debt	338.6	[3]	357.7	[3]
March 2023 Notes [Member] | Unsecured Debt [Member] | Carrying Amount [Member]	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Fair value of debt	346.6		346.3
Term loan facilities [Member] | Unsecured Debt [Member] | Fair Value [Member]	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Fair value of debt	947.5	[1]	1,222.60	[1]
Term loan facilities [Member] | Unsecured Debt [Member] | Carrying Amount [Member]	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Fair value of debt	947.5		1,222.60
Revolving credit and swing facilities [Member] | Line of Credit [Member] | Fair Value [Member]	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Fair value of debt	184.3	[1]	242.3	[1]
Revolving credit and swing facilities [Member] | Line of Credit [Member] | Carrying Amount [Member]	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Fair value of debt	184.3		242.3
Receivables-backed financing facility [Member] | Secured Debt [Member] | Fair Value [Member]	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Fair value of debt	260	[1]	410	[1]
Receivables-backed financing facility [Member] | Secured Debt [Member] | Carrying Amount [Member]	'		'
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]	'		'
Fair value of debt	$260		$410
[1]	Fair value approximates the carrying amount as the variable interest rates reprice frequently at observable current market rates. As such, fair value is categorized as level 2 within the fair value hierarchy.
[2]	Fair value for certain debt is estimated based on the discounted value of future cash flows using observable current market interest rates offered for debt of similar credit risk and maturity. As such, fair value is categorized as level 2 within the fair value hierarchy.
[3]	Fair value is categorized as level 2 within the fair value hierarchy since the notes trade infrequently. Fair value is based on quoted market prices.

Leases_Details

Leases (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Operating Leased Assets [Line Items]	'	'	'
Fiscal 2014	$51	'	'
Fiscal 2015	44.3	'	'
Fiscal 2016	35.5	'	'
Fiscal 2017	28.3	'	'
Fiscal 2018	23.6	'	'
Thereafter	72.9	'	'
Total future minimum lease payments	255.6	'	'
Rental expense	$101.50	$88.10	$42.60

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Deferred income tax assets:	'	'	'	'	'	'	'	'	'	'	'
United States	'	'	'	'	'	'	'	'	$636.50	$374.70	$163.70
Foreign	'	'	'	'	'	'	'	'	74.2	14.4	51.8
Income before income taxes	256.8	203.1	109.1	141.7	120.8	90.6	53.3	124.4	710.7	389.1	215.5
Current income taxes:	'	'	'	'	'	'	'	'	'	'	'
Federal	'	'	'	'	'	'	'	'	-8.3	-4.5	-0.4
State	'	'	'	'	'	'	'	'	23.7	7.5	0.5
Foreign	'	'	'	'	'	'	'	'	7.1	10.5	9.4
Total current	'	'	'	'	'	'	'	'	22.5	13.5	9.5
Deferred income taxes:	'	'	'	'	'	'	'	'	'	'	'
Federal	'	'	'	'	'	'	'	'	-44.6	129.1	55.5
State	'	'	'	'	'	'	'	'	2.6	-0.6	1.5
Foreign	'	'	'	'	'	'	'	'	-2.3	-5.1	3
Total deferred	'	'	'	'	'	'	'	'	-44.3	123.4	60
(Benefit) provision for income taxes	'	'	'	'	'	'	'	'	-21.8	136.9	69.5
Operating Loss Carryforwards	605.8	'	'	'	418.4	'	'	'	605.8	418.4	'
Excess Tax Benefit from Share-based Compensation Not Yet Realized	'	'	'	'	'	'	'	'	14.2	10.3	'
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	28.8	'	'	'	4.6	'	'	'	28.8	4.6	'
Foreign Country [Member]	'	'	'	'	'	'	'	'	'	'	'
Deferred income taxes:	'	'	'	'	'	'	'	'	'	'	'
Operating Loss Carryforwards	112	'	'	'	27.3	'	'	'	112	27.3	'
Operating Loss Carryforwards, Valuation Allowance	$7.30	'	'	'	$4.20	'	'	'	$7.30	$4.20	'

Income_Taxes_Effective_Tax_Rat

Income Taxes Effective Tax Rate Reconciliation (Details)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Statutory federal tax rate	35.00%	35.00%	35.00%
Foreign rate differential	-1.90%	0.20%	-2.50%
Adjustment and resolution of federal, state and foreign tax uncertainties	-35.90%	-0.10%	0.30%
State taxes, net of federal benefit	3.30%	3.40%	2.30%
Research and development and other tax credits, net of valuation allowances	-1.40%	-0.50%	-1.10%
Income attributable to noncontrolling interest	-0.20%	-0.10%	-0.30%
Nondeductible deal fees	0.00%	0.00%	1.30%
Change in valuation allowance	-0.70%	-1.30%	0.00%
Other, net	-1.30%	-1.40%	-2.70%
Effective (benefit) tax rate	-3.10%	35.20%	32.30%

Income_Taxes_Deferred_Taxes_De

Income Taxes Deferred Taxes (Details) (USD $)

12 Months Ended

3 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2012

Mar. 31, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2013

Smurfit Stone [Member]

Smurfit Stone [Member]

State and Local Jurisdiction [Member]

State and Local Jurisdiction [Member]

Foreign Country [Member]

Foreign Country [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Cellulosic Biofuel Producer Credit [Member]

Cellulosic Biofuel Producer Credit [Member]

Alternative Minimum Tax Credits [Member]

Alternative Minimum Tax Credits [Member]

Other Federal Credit Carryforwards [Member]

Other Federal Credit Carryforwards [Member]

Other Federal Credit Carryforwards [Member]

Other Federal Credit Carryforwards [Member]

State and Local Jurisdiction [Member]

Foreign Country [Member]

State and Local Jurisdiction [Member]

Foreign Country [Member]

Minimum [Member]

Maximum [Member]

Deferred income tax assets:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Accruals and allowances

$23.50

$25.20

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Employee related accruals and allowances

104.8

107.5

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Pension obligations

333.3

489

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

State net operating loss carryforwards

68.3

44.2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

State credit carryforwards, net of federal benefit

49.1

47

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

CBPC and other federal tax credit carryforwards

233.6

225.6

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Federal net operating loss carryforwards

207

146.4

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Restricted stock and options

30.5

22.4

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Other

28.8

21.9

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Valuation allowances

-36.2

-42.3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total

1,042.70

1,086.90

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deferred income tax liabilities:

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Property, plant and equipment

1,477.20

1,439

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deductible intangibles and goodwill

287

283.8

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Inventory reserves

80.5

80.2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deferred gain

31

31

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Other

0.5

0.7

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Total

1,876.20

1,834.70

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net deferred income tax liability

833.5

747.8

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Current deferred tax asset

209.1

104

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Current deferred tax liability

0

0.1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term deferred tax asset

20.5

37.1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term deferred tax liability

1,063.10

888.8

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Operating Loss Carryforwards

605.8

418.4

'

'

1,543

1,160

112

27.3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Operating loss carryforward expiration

'

'

'

'

'

'

'

'

1-Oct-29

1-Oct-14

1-Oct-16

30-Sep-31

30-Sep-32

30-Sep-33

'

'

'

'

'

'

'

'

Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions

'

'

254.1

254.1

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Operating Loss Carryforwards, Valuation Allowance

'

'

'

'

4.4

3.2

7.3

4.2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Tax Credit Carryforward, Deferred Tax Asset

'

'

'

'

49.1

47

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Tax Credit Carryforward, Expiration Date

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1-Oct-18

30-Sep-33

Excess Tax Benefit from Share-based Compensation Not Yet Realized

14.2

10.3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deferred Tax Assets, Operating Loss Carryforwards, State and Local

68.3

44.2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Tax credit carryforward

'

'

'

'

'

'

'

'

'

'

'

'

'

'

138.1

145.6

79.7

71.8

15.8

8.2

'

'

Tax credit carryforward, valuation allowance

'

'

'

'

24.2

29.9

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deferred Income Taxes and Other Assets, Current

209.1

104

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Tax Credit Carryforward, Years to Expiration

'

'

'

'

'

'

'

'

'

'5 years

'

'

'10 years

'

'

'

'

'

'

'

'

'

Undistributed Foreign Earnings

158.3

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Deferred Tax Liability Not Recognized, Amount of Unrecognized Deferred Tax Liability

$7.10

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Income_Taxes_Valuation_Allowan

Income Taxes Valuation Allowance Against Deferred Tax Assets (Details) (Valuation Allowance of Deferred Tax Assets [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012		Sep. 30, 2011
Valuation Allowance of Deferred Tax Assets [Member]	'	'		'
Movement in Deferred Tax Asset Valuation Allowance [Roll Forward]	'	'		'
Balance at the beginning of period	$42.30	$48		$40.20
Charges to costs and expenses	3.6	4.3		5.8
Allowances related to acquistions	0	0	[1]	7.8	[1]
Deductions	-9.7	-10		-5.8
Balance at end of period	$36.20	$42.30		$48
[1]	Allowances related to acquisitions in fiscal 2011 are related to the Smurfit-Stone Acquisition.

Income_Taxes_Unrecognized_Tax_

Income Taxes Unrecognized Tax Benefit (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012		Sep. 30, 2011
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$19.20	$265.60		'
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]	'	'		'
Unrecognized tax benefits, balance at the beginning of period	289.7	287.9		12.2
(Reductions) additions related to acquisitions	0	-1.4	[1]	275.5	[1]
Additions for tax positions taken in current year	2.6	7		0
(Reductions) additions for tax positions taken in prior years	-268.5	0		1.5
Reductions due to settlements	-0.2	0		0
Reductions as a result of a lapse of the applicable statute of limitations	-2.3	-3.8		-1.3
Unrecognized tax benefits, balance at the end of period	21.3	289.7		287.9
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	1.2	2		'
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	$0.70	$1.90		'
[1]	Adjustments related to acquisitions in fiscal 2012 and 2011 are related to the Smurfit-Stone Acquisition.

Retirement_Plans_Details

Retirement Plans (Details) (USD $)

12 Months Ended

12 Months Ended

4 Months Ended

12 Months Ended

4 Months Ended

12 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2011

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Pension Plans, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

United States Postretirement Benefit Plan of US Entity, Defined Benefit [Member]

United States Postretirement Benefit Plan of US Entity, Defined Benefit [Member]

United States Postretirement Benefit Plan of US Entity, Defined Benefit [Member]

Domestic Postretirement Benefit Plan of Foreign Entity, Defined Benefit [Member]

Domestic Postretirement Benefit Plan of Foreign Entity, Defined Benefit [Member]

Domestic Postretirement Benefit Plan of Foreign Entity, Defined Benefit [Member]

Supplemental Employee Retirement Plan, Defined Benefit [Member]

Supplemental Employee Retirement Plan, Defined Benefit [Member]

Supplemental Employee Retirement Plan, Defined Benefit [Member]

Supplemental Employee Retirement Plan, Defined Benefit [Member]

Supplemental Employee Retirement Plan, Defined Benefit [Member]

Supplemental Employee Retirement Plan, Defined Benefit [Member]

Supplemental Employee Retirement Plan, Defined Benefit [Member]

Supplemental Employee Retirement Plan, Defined Benefit [Member]

Supplemental Employee Retirement Plan, Defined Benefit [Member]

Equity Securities [Member]

Equity Securities [Member]

Equity Securities [Member]

Equity Securities [Member]

Fixed Income Funds [Member]

Fixed Income Funds [Member]

Fixed Income Funds [Member]

Fixed Income Funds [Member]

Short-term Investments [Member]

Short-term Investments [Member]

Short-term Investments [Member]

Short-term Investments [Member]

Other Investments [Member]

Other Investments [Member]

Other Investments [Member]

Other Investments [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase

'

'

'

'

3.11%

2.00%

2.75%

2.50%

3.32%

'

'

3.75%

'

3.00%

3.00%

3.25%

3.25%

'

'

'

3.75%

3.00%

3.00%

6.00%

6.00%

6.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets

'

7.50%

7.50%

8.00%

7.86%

'

'

'

'

6.90%

6.88%

6.00%

'

'

3.51%

'

6.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Defined Benefit Plan, Target Allocation Percentage of Assets, Equity Investments

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

40.00%

40.00%

29.00%

29.00%

45.00%

45.00%

58.00%

58.00%

1.00%

2.00%

1.00%

1.00%

14.00%

13.00%

12.00%

12.00%

Defined Benefit Plan, Actual Plan Asset Allocations

'

'

100.00%

100.00%

'

'

'

'

'

'

100.00%

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

42.00%

42.00%

31.00%

31.00%

44.00%

45.00%

57.00%

58.00%

4.00%

3.00%

2.00%

2.00%

10.00%

10.00%

10.00%

9.00%

Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year

$239

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate

'

'

5.19%

4.22%

'

'

'

'

'

'

4.56%

'

4.14%

'

'

'

'

'

5.19%

4.22%

'

4.56%

4.14%

'

'

'

3.39%

2.57%

'

5.19%

4.22%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase

'

'

'

'

'

2.00%

2.00%

2.50%

2.50%

'

'

'

'

3.00%

3.00%

3.25%

3.25%

'

'

'

'

3.00%

3.00%

3.00%

6.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate

'

'

4.22%

5.27%

5.50%

'

'

'

'

'

4.14%

5.13%

'

'

3.51%

'

4.90%

5.56%

4.22%

5.27%

5.13%

4.14%

4.90%

'

'

'

2.57%

0.87%

0.24%

4.22%

4.61%

5.09%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Retirement_Plans_Assumptions_D

Retirement Plans Assumptions (Details)

12 Months Ended

4 Months Ended

12 Months Ended

4 Months Ended

12 Months Ended

12 Months Ended

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2011

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Postretirement Benefit Plan of US Entity, Defined Benefit [Member]

United States Postretirement Benefit Plan of US Entity, Defined Benefit [Member]

United States Postretirement Benefit Plan of US Entity, Defined Benefit [Member]

Domestic Postretirement Benefit Plan of Foreign Entity, Defined Benefit [Member]

Domestic Postretirement Benefit Plan of Foreign Entity, Defined Benefit [Member]

Domestic Postretirement Benefit Plan of Foreign Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Supplemental Employee Retirement Plan, Defined Benefit [Member]

Supplemental Employee Retirement Plan, Defined Benefit [Member]

Supplemental Employee Retirement Plan, Defined Benefit [Member]

Supplemental Employee Retirement Plan, Defined Benefit [Member]

Supplemental Employee Retirement Plan, Defined Benefit [Member]

Supplemental Employee Retirement Plan, Defined Benefit [Member]

Supplemental Employee Retirement Plan, Defined Benefit [Member]

Supplemental Employee Retirement Plan, Defined Benefit [Member]

Supplemental Employee Retirement Plan, Defined Benefit [Member]

Discounted Cash Flow [Member]

Discounted Cash Flow [Member]

Discounted Cash Flow [Member]

Discounted Cash Flow [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Minimum [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Maximum [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Fair Value, Measurements, Recurring [Member]

Real Estate Funds [Member]

Real Estate Funds [Member]

Real Estate Funds [Member]

Real Estate Funds [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Fair Value, Inputs, Level 3 [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Defined Benefit Plan Disclosure [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate

'

5.19%

4.22%

'

'

'

'

'

'

5.19%

4.22%

'

4.56%

4.14%

'

4.56%

'

4.14%

'

'

'

'

'

'

'

3.39%

2.57%

'

5.19%

4.22%

'

'

'

'

'

Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase

'

'

'

'

2.00%

2.00%

2.50%

2.50%

'

'

'

'

3.00%

3.00%

'

'

'

'

3.00%

3.00%

3.25%

3.25%

3.00%

6.00%

'

'

'

'

'

'

'

'

'

'

'

Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets

7.50%

7.50%

8.00%

7.86%

'

'

'

'

'

'

'

'

'

'

6.90%

6.88%

6.00%

'

'

3.51%

'

6.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase

'

'

'

3.11%

2.00%

2.75%

2.50%

3.32%

'

'

'

3.75%

3.00%

3.00%

'

'

3.75%

'

3.00%

3.00%

3.25%

3.25%

6.00%

6.00%

6.00%

'

'

'

'

'

'

'

'

'

'

Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate

'

4.22%

5.27%

5.50%

'

'

'

'

5.56%

4.22%

5.27%

5.13%

4.14%

4.90%

'

4.14%

5.13%

'

'

3.51%

'

4.90%

'

'

'

2.57%

0.87%

0.24%

4.22%

4.61%

5.09%

'

'

'

'

Fair Value Inputs, Rental Rate Factor

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.00%

0.00%

25.00%

25.00%

Fair Value Inputs, Capitalization Rates

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5.00%

5.00%

8.00%

8.00%

Fair Value Inputs, Discount Rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

7.00%

7.00%

9.00%

9.00%

Fair Value Inputs, Inflation Rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.00%

0.00%

5.00%

5.00%

Retirement_Plans_Defined_Benef

Retirement Plans Defined Benefit Plan Obligations (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2011	Sep. 30, 2013	Sep. 30, 2012
In Millions, unless otherwise specified			Pension Plan, Defined Benefit [Member]	Pension Plan, Defined Benefit [Member]	Pension Plan, Defined Benefit [Member]	Other Postretirement Benefit Plan, Defined Benefit [Member]	Other Postretirement Benefit Plan, Defined Benefit [Member]	Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'	'	'	'	'
Defined Benefit Plan, Assumptions Used, Minimum Outstanding Par Value of Bonds Used to Determine Future Discount Rate	$100	'	'	'	'	'	'	'
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]	'	'	'	'	'	'	'	'
Benefit obligations at beginning of period	'	'	4,973.50	4,363.50	'	'	166.2	167.5
Service cost	'	'	35.1	30.1	17.2	0.6	1.6	1.5
Interest cost	'	'	199.7	221.4	95.1	3.2	6.5	7.8
Amendments	'	'	4.1	2.6	'	'	-9.3	-0.2
Actuarial loss (gain)	'	'	-380.3	555.3	'	'	-17.9	-2.5
Plan participant contributions	'	'	2.8	3	'	'	5.4	5.9
Benefits paid	'	'	-260.4	-263.5	'	'	-17.3	-17.4
Business combinations	'	'	0	-4.2	'	'	0	0
Defined Benefit Plan, Curtailments	'	'	-0.8	0	'	'	-2.7	0
Defined Benefit Plan, Settlements, Benefit Obligation	'	'	-1.1	0	'	'	0	0
Foreign currency rate changes	'	'	-48.4	65.3	'	'	-2.3	3.6
Benefit obligation at end of period	'	'	4,524.20	4,973.50	4,363.50	167.5	130.2	166.2
Defined Benefit Plan, Accumulated Benefit Obligation	$4,487.40	$4,921.30	'	'	'	'	'	'

Retirement_Plans_Change_in_Fai

Retirement Plans Change in Fair Value of Plan Assets (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Other Postretirement Benefit Plan, Defined Benefit [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Fair value of plan assets at beginning of year	$0	$0
Actual gain on plan assets	0	0
Employer contributions	11.9	11.5
Plan participant contributions	5.4	5.9
Benefits paid	-17.3	-17.4
Defined Benefit Plan, Settlements, Plan Assets	0	0
Foreign currency rate changes	0	0
Fair value of assets at end of year	0	0
Pension Plan, Defined Benefit [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Fair value of plan assets at beginning of year	3,480.20	2,919.40
Actual gain on plan assets	152.6	400.6
Employer contributions	188.9	367.5
Plan participant contributions	2.8	3
Benefits paid	-260.4	-263.5
Defined Benefit Plan, Settlements, Plan Assets	-1.1	0
Foreign currency rate changes	-40.3	53.2
Fair value of assets at end of year	3,522.70	3,480.20
Nonqualified Plan [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Employer contributions	'	$12.80

Retirement_Plans_Underfunded_S

Retirement Plans Underfunded Status of Pension and Postretirement Plans (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012
In Millions, unless otherwise specified
Other Postretirement Benefit Plan, Defined Benefit [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Pension and Other Postretirement Defined Benefit Plans, Current Liabilities	($11.90)	($12)
Accrued pension and other long-term benefits	-118.3	-154.2
Net amount recognized	-130.2	-166.2
Pension Plan, Defined Benefit [Member]	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'
Pension and Other Postretirement Defined Benefit Plans, Current Liabilities	-26.3	-0.2
Accrued pension and other long-term benefits	-975.2	-1,493.10
Net amount recognized	($1,001.50)	($1,493.30)

Retirement_Plans_Amounts_in_Ac

Retirement Plans Amounts in Accumulated Other Comprehensive Income (Loss) and Other Comprehensive (Income) Loss (Details) (USD $)	12 Months Ended						4 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2011	Sep. 30, 2013	Sep. 30, 2012
				Pension Plan, Defined Benefit [Member]	Pension Plan, Defined Benefit [Member]	Pension Plan, Defined Benefit [Member]	Other Postretirement Benefit Plan, Defined Benefit [Member]	Other Postretirement Benefit Plan, Defined Benefit [Member]	Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'	'	'	'	'	'
Net actuarial (gain) loss	'	'	'	$551.20	$877	'	'	($17.90)	($0.10)
Prior service cost (credit)	'	'	'	7.8	5	'	'	-10.9	-1.8
Total accumulated other comprehensive loss (income)	'	'	'	559	882	'	'	-28.8	-1.9
Net actuarial (gain) loss arising during period	-303.9	375	336	-286.6	377.6	334	2	-17.3	-2.5
Amortization of net actuarial loss	-39.3	-21.4	-18.9	-39.3	-21.4	-18.9	0	0	0
Prior service (cost) credit arising during period	-5.2	2.2	-0.3	4.1	2.6	0.7	-1	-9.3	-0.5
Amortization of prior service (cost) credit	-1.5	-0.7	-0.7	-1.2	-0.8	-0.7	0	-0.3	0.1
Net amount recognized in other comprehensive (income) loss	'	'	'	($323)	$358	$315.10	$1	($26.90)	($2.90)

Retirement_Plans_Amounts_Recog

Retirement Plans Amounts Recognized in Consolidated Statement of Income (Details) (USD $)	12 Months Ended			4 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2011	Sep. 30, 2013	Sep. 30, 2012
	Pension Plan, Defined Benefit [Member]	Pension Plan, Defined Benefit [Member]	Pension Plan, Defined Benefit [Member]	Other Postretirement Benefit Plan, Defined Benefit [Member]	Other Postretirement Benefit Plan, Defined Benefit [Member]	Other Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]	'	'	'	'	'	'
Service cost	$35.10	$30.10	$17.20	$0.60	$1.60	$1.50
Interest cost	199.7	221.4	95.1	3.2	6.5	7.8
Expected return on plan assets	-247.3	-222.1	-91.9	0	0	0
Amortization of net actuarial loss	38.9	21.4	18.9	0	0	0
Amortization of prior service cost (credit)	1.2	0.8	0.7	0	0.3	-0.1
Curtailment Gain	0	0	0	0	-2.7	0
Settlement Loss	0.4	0	0	0	0	0
Company defined benefit plan expense	28	51.6	40	3.8	5.7	9.2
Multiemployer and other plans	20.3	9.8	4.6	0	0	0
Net pension cost	$48.30	$61.40	$44.60	$3.80	$5.70	$9.20

Retirement_Plans_Assumed_Healt

Retirement Plans Assumed Health Care Cost Trend Rates (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013
Defined Benefit Plan Disclosure [Line Items]	'
Defined Benefit Plan, Effect of One Percentage Point Decrease on Accumulated Postretirement Benefit Obligation	$7
United States Pension Plan of US Entity, Defined Benefit [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Health care cost trend rates assumed for next year	9.13%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)	5.00%
Year the rate reaches the ultimate trend rate	'2030
Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Health care cost trend rates assumed for next year	7.30%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)	4.80%
Year the rate reaches the ultimate trend rate	'2029

Retirement_Plans_Weightedavera

Retirement Plans Weighted-average Assumptions (Details)

12 Months Ended

4 Months Ended

12 Months Ended

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2014

Sep. 30, 2013

Sep. 30, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

United States Pension Plan of US Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Domestic Pension Plan of Foreign Entity, Defined Benefit [Member]

Domestic Postretirement Benefit Plan of Foreign Entity, Defined Benefit [Member]

Domestic Postretirement Benefit Plan of Foreign Entity, Defined Benefit [Member]

Domestic Postretirement Benefit Plan of Foreign Entity, Defined Benefit [Member]

Supplemental Employee Retirement Plan, Defined Benefit [Member]

Supplemental Employee Retirement Plan, Defined Benefit [Member]

Supplemental Employee Retirement Plan, Defined Benefit [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Minimum [Member]

Minimum [Member]

Maximum [Member]

Maximum [Member]

Defined Benefit Plan Disclosure [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase

'

'

'

3.11%

2.00%

2.75%

2.50%

3.32%

'

'

3.75%

3.00%

3.00%

3.25%

3.25%

3.75%

3.00%

3.00%

6.00%

6.00%

6.00%

Expected long-term rate of return on plan assets

7.50%

7.50%

8.00%

7.86%

'

'

'

'

6.90%

6.88%

6.00%

'

3.51%

'

6.00%

'

'

'

'

'

'

Retirement_Plans_Losses_Amorti

Retirement Plans Losses Amortized from Accumulated Other Comprehensive Loss into Net Periodic Benefit Cost (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2014
Other Postretirement Benefit Plan, Defined Benefit [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Actuarial loss (gain)	($0.70)
Prior service cost (credit)	-1.4
Total	-2.1
Pension Plan, Defined Benefit [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Actuarial loss (gain)	17.1
Prior service cost (credit)	1.3
Total	$18.40

Retirement_Plans_Projected_Est

Retirement Plans Projected Estimated Benefit Payments (Details) (USD $)	Sep. 30, 2013
In Millions, unless otherwise specified
Pension Plan, Defined Benefit [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Fiscal 2014	$296.70
Fiscal 2015	275.1
Fiscal 2016	281.7
Fiscal 2017	286.1
Fiscal 2018	290.8
Fiscal Years 2019 – 2023	1,507.80
Other Postretirement Benefit Plan, Defined Benefit [Member]	'
Defined Benefit Plan Disclosure [Line Items]	'
Fiscal 2014	11.9
Fiscal 2015	11.6
Fiscal 2016	11
Fiscal 2017	10.4
Fiscal 2018	10.2
Fiscal Years 2019 – 2023	$46.70

Retirement_Plans_Pension_Plan_

Retirement Plans Pension Plan Assets Measured at Fair Value (Details) (Fair Value, Measurements, Recurring [Member], USD $)	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2011
In Millions, unless otherwise specified
Estimate of Fair Value, Fair Value Disclosure [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	$3,522.70		$3,480.20		'
Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	582.7		608.4		'
Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	2,879.60		2,808.50		'
Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	60.4		63.3		183.3
US Equity Securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	318	[1]	275.5	[1]	'
US Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	133.7	[1]	107.1	[1]	'
US Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	184.3	[1]	168.4	[1]	'
US Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]	'
Non US Equity Securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	810.4	[1]	808.3	[1]	'
Non US Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	58.1	[1]	99.8	[1]	'
Non US Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	752.3	[1]	708.5	[1]	'
Non US Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]	'
Hedged Equities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	267.2	[1]	277.4	[1]	'
Hedged Equities [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]	'
Hedged Equities [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	267.2	[1]	277.4	[1]	'
Hedged Equities [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0	[1]	0	[1]	'
US Government Debt Securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	127.8	[2]	152.6	[2]	'
US Government Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0	[2]	0	[2]	'
US Government Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	127.8	[2]	152.6	[2]	'
US Government Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0	[2]	0	[2]	'
Non-US government securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	94.2	[3]	83.6	[3]	'
Non-US government securities [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0	[3]	0	[3]	'
Non-US government securities [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	94.2	[3]	83.6	[3]	'
Non-US government securities [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0	[3]	0	[3]	'
US Corporate Bonds [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	675.8	[3]	667.7	[3]	'
US Corporate Bonds [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	106.3	[3]	98.3	[3]	'
US Corporate Bonds [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	569.5	[3]	569.4	[3]	'
US Corporate Bonds [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0	[3]	0	[3]	'
Non-US corporate bonds [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	478.3	[3]	489.8	[3]	'
Non-US corporate bonds [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	170.8	[3]	188.8	[3]	'
Non-US corporate bonds [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	307.5	[3]	301	[3]	'
Non-US corporate bonds [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0	[3]	0	[3]	'
Collateralized Mortgage Backed Securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	49.2	[3]	46.5	[3]	'
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0	[3]	0	[3]	'
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	49.2	[3]	46.5	[3]	'
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0	[3]	0	[3]	'
Other Fixed Income Securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	225.3	[4]	233	[4]	'
Other Fixed Income Securities [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0	[4]	0	[4]	'
Other Fixed Income Securities [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	225.3	[4]	233	[4]	'
Other Fixed Income Securities [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0	[4]	0	[4]	'
Short-term Investments [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	113.8	[5]	114.4	[5]	'
Short-term Investments [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	113.8	[5]	114.4	[5]	'
Short-term Investments [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0	[5]	0	[5]	'
Short-term Investments [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0	[5]	0	[5]	'
Alternative Investments [Member] | Estimate of Fair Value, Fair Value Disclosure [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	362.7	[6]	331.4	[6]	'
Alternative Investments [Member] | Fair Value, Inputs, Level 1 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	0	[6]	0	[6]	'
Alternative Investments [Member] | Fair Value, Inputs, Level 2 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	302.3	[6]	268.1	[6]	'
Alternative Investments [Member] | Fair Value, Inputs, Level 3 [Member]	'		'		'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'		'		'
Defined Benefit Plan, Fair Value of Plan Assets	$60.40	[6]	$63.30	[6]	'
[1]	Equity securities are comprised of the following investment types: (i) common stock; (ii) preferred stock; (iii) equity exchange traded funds; (iv) hedged equity investments and (v) commingled equity funds. Investments in common and preferred stocks and exchange traded funds are valued using quoted market prices multiplied by the number of shares owned. The hedged equity investment is a commingled fund that consists primarily of equity indexed investments which are hedged by options and also holds collateral in the form of short term treasury securities. The commingled fund investments are valued at the net asset value per share multiplied by the number of shares held. The determination of net asset value for the commingled funds includes market pricing of the underlying assets as well as broker quotes and other valuation techniques.
[2]	U.S. government securities include treasury and agency debt. These investments are valued using broker quotes in an active market.
[3]	These investments are valued utilizing a market approach that includes various valuation techniques and sources such as value generation models, broker quotes in active and non-active markets, benchmark yields and securities, reported trades, issuer spreads, and/or other applicable reference data. The U.S. corporate bonds category is primarily comprised of U.S. dollar denominated investment grade securities. Commingled debt funds are valued at their net asset value per share multiplied by the number of shares held. The determination of net asset value for the commingled funds includes market pricing of the underlying assets as well as broker quotes and other valuation techniques.
[4]	Other fixed income is comprised of municipal and asset-backed securities. Investments are valued utilizing a market approach that includes various valuation techniques and sources such as, broker quotes in active and non-active markets, benchmark yields and securities, reported trades, issuer spreads and/or other applicable reference data.
[5]	Short-term investments are valued at $1.00/unit, which approximates fair value. Amounts are generally invested in interest-bearing accounts.
[6]	The alternative investments are diversified across multiple asset managers and several types of asset classes including hedge funds, private equity partnerships and real estate funds. The hedge funds are valued at net asset value. Fair value of the private equity partnerships is determined based on discounted cash flow analysis that utilizes unobservable inputs such as weighted average cost of capital ranging from 8.8% to 16.1% for 2013 and 7.3% to 20.0% for 2012; residual growth rate assumptions ranging from 1.0% to 4.0% for 2013 and 1.5% to 4.0% for 2012; revenue growth rates ranging from 2.2% to 6.6% for 2013 and 1.6% to 9.1% for 2012; and EBITDA of market comparable companies with multiples ranging from 7.0 to 13.2 for 2013 and 4.8 to 14.5 for 2012. The fair value of our real estate funds is based on the utilization of various unobservable inputs including but not limited to rental rate factors ranging from 0% to 25% for 2013 and 2012; capitalization rates ranging from 5% to 8% for 2013 and 2012; discount rates ranging from 7% to 9% for 2013 and 2012; and inflation rates ranging from 0% to 5% for 2013 and 2012.

Retirement_Plans_Fair_Value_Ch

Retirement Plans Fair Value, Changes in Level 3 (Details) (Fair Value, Inputs, Level 3 [Member], Fair Value, Measurements, Recurring [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]	'	'
Fair value of plan assets at beginning of year	$63.30	$183.30
Purchases, sales, issuances and settlements, net	-9	-2.9
Actual return on plan assets, relating to instruments still held at end of year	2.5	9.7
Actual return on plan assets, relating to instruments sold during the year	3.6	2.7
Transfers out of level 3	'	-129.5
Fair value of assets at end of year	60.4	63.3
Non-US corporate bonds [Member]	'	'
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]	'	'
Fair value of plan assets at beginning of year	0	1.4
Purchases, sales, issuances and settlements, net	0	-1.3
Actual return on plan assets, relating to instruments still held at end of year	0	0
Actual return on plan assets, relating to instruments sold during the year	0	-0.1
Transfers out of level 3	'	0
Fair value of assets at end of year	0	0
Alternative Investments [Member]	'	'
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]	'	'
Fair value of plan assets at beginning of year	63.3	181.9
Purchases, sales, issuances and settlements, net	-9	-1.6
Actual return on plan assets, relating to instruments still held at end of year	2.5	9.7
Actual return on plan assets, relating to instruments sold during the year	3.6	2.8
Transfers out of level 3	'	-129.5
Fair value of assets at end of year	$60.40	$63.30

Retirement_Plans_Fair_Value_In

Retirement Plans Fair Value Inputs, Assets, Quantitative Information (Details) (Fair Value, Inputs, Level 3 [Member], Fair Value, Measurements, Recurring [Member])	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Private Equity Funds [Member] | Minimum [Member] | Discounted Cash Flow [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Fair Value Inputs, Weighted Average Cost of Capital	8.80%	7.30%
Fair Value Inputs, Residual Growth Rate	1.00%	1.50%
Fair Value Inputs, Long-term Revenue Growth Rate	2.20%	1.60%
Private Equity Funds [Member] | Minimum [Member] | Market Comparable Companies [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Fair Value Inputs, Earnings before Interest, Taxes, Depreciation, and Amortization Multiple	7	4.8
Private Equity Funds [Member] | Maximum [Member] | Discounted Cash Flow [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Fair Value Inputs, Weighted Average Cost of Capital	16.10%	20.00%
Fair Value Inputs, Residual Growth Rate	4.00%	4.00%
Fair Value Inputs, Long-term Revenue Growth Rate	6.60%	9.10%
Private Equity Funds [Member] | Maximum [Member] | Market Comparable Companies [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Fair Value Inputs, Earnings before Interest, Taxes, Depreciation, and Amortization Multiple	13.2	14.5
Real Estate Funds [Member] | Minimum [Member] | Discounted Cash Flow [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Fair Value Inputs, Rental Rate Factor	0.00%	0.00%
Fair Value Inputs, Capitalization Rates	5.00%	5.00%
Fair Value Inputs, Discount Rate	7.00%	7.00%
Fair Value Inputs, Inflation Rate	0.00%	0.00%
Real Estate Funds [Member] | Maximum [Member] | Discounted Cash Flow [Member]	'	'
Fair Value Inputs, Assets, Quantitative Information [Line Items]	'	'
Fair Value Inputs, Rental Rate Factor	25.00%	25.00%
Fair Value Inputs, Capitalization Rates	8.00%	8.00%
Fair Value Inputs, Discount Rate	9.00%	9.00%
Fair Value Inputs, Inflation Rate	5.00%	5.00%

Retirement_Plans_Schedule_Of_M

Retirement Plans Schedule Of Multiemployer Plans (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2011
Schedule Of Multiemployer Plans [Line Items]	'		'		'
Percentage of Employees Covered by Collective Bargaining Agreements	46.00%		'		'
Percentage of Employees Working Under Expired Collective Bargaining Agreement	17.00%		'		'
Percentage of Employees Covered By Collective Bargaining Agreements Expiring in One Year	30.00%		'		'
Multiemployer Plan, Withdrawal Obligation	$17.10		$3.90		'
Multiemployer and other plans	7.1		9.8		4.6
Multiemployer Plan, Accrual Related to a Partial Plan Withdrawal	13.2		'		'
Other Funds [Member]	'		'		'
Schedule Of Multiemployer Plans [Line Items]	'		'		'
Multiemployer and other plans	3.2		6.2		2.8
Pension Plan, Defined Benefit [Member] | Pace Industry Union Management Pension Fund [Member]	'		'		'
Schedule Of Multiemployer Plans [Line Items]	'		'		'
Entity Tax Identification Number	'116166763		'		'
Multiemployer Plan Number	'001		'		'
Multiemployer Plans, Certified Zone Status	'Red		'Red		'
Multiemployer Plans, Funding Improvement Plan and Rehabilitation Plan	'Implemented		'		'
Multiemployer and other plans	$3.90	[1]	$3.60	[1]	$1.80	[1]
Multiemployer Plans, Surcharge	'Yes		'		'
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date, First	30-Sep-11		'		'
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date, Last	2-Aug-17		'		'
Contributions Exceed 5% of Total Plan Contributions	'		'Yes		'Yes
[1]	Contributions represent the amounts contributed to the plan during the fiscal year. Our contributions for fiscal 2012 and 2011 exceeded 5% of total plan contributions. Although the plan data for fiscal 2013 is not yet available, we would expect to continue to exceed 5% of total plan contributions. Contributions for fiscal 2013 exclude $13.2 million accrued related to a partial plan withdrawal.

Retirement_Plans_Defined_Contr

Retirement Plans Defined Contribution and Supplemental Plans (Details) (USD $)	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Defined Contribution Plan Employer Contribution on Basic Salary, Maximum, Low End of Range	3.00%	'	'
Defined Contribution Plan Employer Contribution on Basic Salary, Maximum, High End of Range	4.00%	'	'
Defined Contribution Plan, Cost Recognized	$29,900,000	$31,800,000	$20,300,000
Other Pension Plans, Postretirement or Supplemental Plans, Defined Benefit [Member]	'	'	'
Defined Benefit Plan Disclosure [Line Items]	'	'	'
Nonqualified Deferred Compensation, Maximum Deferral, Senior Executive Portion	6.00%	'	'
Defined Contribution Plan Employer Contribution, Match Per Dollar	0.5	'	'
Pension and Other Postretirement and Postemployment Benefit Plans, Asset and Liability Balance	$13,300,000	'	'

Shareholders_Equity_Details

Shareholders' Equity (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012	Nov. 04, 2013	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
In Millions, except Per Share data, unless otherwise specified			Common Stock [Member]	Common Stock [Member]	Common Class A [Member]	Common Class A [Member]	Common Class A [Member]
Class A Common Stock, par value	$0.01	$0.01	'	'	$0.01	'	'
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	'	'	9.2	6	'	'	'
Stock Repurchased During Period, Shares	'	'	'	'	0	0	0
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased	'	'	5	1.8	'	'	'

ShareBased_Compensation_Detail

Share-Based Compensation (Details) (USD $)

12 Months Ended

12 Months Ended

1 Months Ended

In Millions, except Share data, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

27-May-11

27-May-11

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2013

27-May-11

Restricted Stock Target Awards Potentially Issuable [Member]

2004 Incentive Stock Plan, as Amended [Member]

Restricted Stock, Target Awards [Member]

Stock Options [Member]

Stock Options [Member]

Stock Options [Member]

Restricted Stock, Target Awards, Issued, Not Yet Vested [Member]

Restricted Stock, Target Awards, Issued, Not Yet Vested [Member]

Smurfit Stone [Member]

Smurfit Stone [Member]

Smurfit Stone [Member]

Employee Stock Purchase Plan [Member]

Smurfit Stone [Member]

Smurfit-Stone Incentive Plan [Member]

Smurfit-Stone Incentive Plan [Member]

Stock Options [Member]

Restricted Stock Target Awards Potentially Issuable [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized

'

'

'

'

7,900,000

'

'

'

'

'

'

'

'

'

4,300,000

'

'

4,000,000

Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant

'

'

'

800,000

2,800,000

'

'

'

'

'

'

'

'

'

700,000

100,000

2,600,000

'

Allocated Share-based Compensation Expense

$46.50

$29.20

$21.40

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Employee Service Share-based Compensation, Tax Benefit from Compensation Expense

17.4

11.1

8.2

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Expected term (in years)

'5 years 10 months

'5 years 4 months

'5 years 2 months

'

'

'

'

'

'

'

'

'

'

'3 years 6 months

'

'

'

'

Expected volatility

44.00%

47.30%

46.50%

'

'

'

'

'

'

'

'

'

'

48.80%

'

'

'

'

Risk-free rate

1.00%

0.80%

2.10%

'

'

'

'

'

'

'

'

'

'

1.10%

'

'

'

'

Expected dividends

1.40%

1.40%

1.40%

'

'

'

'

'

'

'

'

'

'

1.40%

'

'

'

'

Shares granted

'

'

'

'

'

'

197,860

'

'

'

'

'

'

1,314,251

'

'

'

'

Stock Options [Roll Forward]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Shares outstanding, beginning of period

'

'

'

'

'

'

1,341,969

'

'

'

'

'

'

'

'

'

'

'

Shares granted

'

'

'

'

'

'

197,860

'

'

'

'

'

'

1,314,251

'

'

'

'

Shares exercised

'

'

'

'

'

'

-312,293

'

'

'

'

'

'

'

'

'

'

'

Shares expired

'

'

'

'

'

'

-3,200

'

'

'

'

'

'

'

'

'

'

'

Shares forfeited

'

'

'

'

'

'

-40,585

'

'

'

'

'

'

'

'

'

'

'

Shares outstanding, end of period

'

'

'

'

'

'

1,183,751

1,341,969

'

'

'

'

'

'

'

'

'

'

Weighted Average Exercise Price, outstanding, beginning of period

'

'

'

'

'

'

$41.73

'

'

'

'

'

'

'

'

'

'

'

Weighted Average Exercise Price, shares granted

'

'

'

'

'

'

$79.81

'

'

'

'

'

'

'

'

'

'

'

Weighted Average Exercise Price, shares exercised

'

'

'

'

'

'

$31.83

'

'

'

'

'

'

'

'

'

'

'

Weighted Average Exercise Price, shares expired

'

'

'

'

'

'

$34.50

'

'

'

'

'

'

'

'

'

'

'

Weighted Average Exercise Price, shares forfeited

'

'

'

'

'

'

$66.29

'

'

'

'

'

'

'

'

'

'

'

Weighted Average Exercise Price, outstanding, end of period

'

'

'

'

'

'

$49.88

$41.73

'

'

'

'

'

'

'

'

'

'

Aggregate Intrinsic Value, Outstanding at end of period

'

'

'

'

'

'

60.8

'

'

'

'

'

'

'

'

'

'

'

Aggregate Intrinsic Value, Exercisable at end of period

'

'

'

'

'

'

46.1

'

'

'

'

'

'

'

'

'

'

'

Shares, Exercisable at end of period

'

'

'

'

'

'

698,916

'

'

'

'

'

'

'

'

'

'

'

Weighted Average Exercise Price, exercisable at end of period

'

'

'

'

'

'

$35.31

'

'

'

'

'

'

'

'

'

'

'

Weighted Average Remaining Contractual Term, Outstanding at end of period

'

'

'

'

'

'

'6 years 5 months

'

'

'

'

'

'

'

'

'

'

'

Weighted Average Remaining Contractual Term, Exercisable

'

'

'

'

'

'

'4 years 11 months

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number

'

'

'

'

'

'

1,164,815

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price

'

'

'

'

'

'

$49.51

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Weighted Average Remaining Contractual Term

'

'

'

'

'

'

'6 years 5 months

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value

'

'

'

'

'

'

60.3

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value

'

'

'

'

'

'

$29.09

$23.81

$41.09

'

'

'

'

$42.89

'

'

'

'

Aggregate intrinsic value of options exercised

'

'

'

'

'

'

16.1

13.5

31.7

'

'

'

'

'

'

'

'

'

Common Stock, Shares, Issued

'

'

'

'

'

'

'

'

'

100,000

100,000

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period

'3 years

'

'

'

'

'3 years

'3 years

'

'

'

'

'

'

'

'

'

'

'

Fair value of share-based awards issued in the acquisition

'

'

'

'

'

'

'

'

'

'

'

56.4

56.4

56.4

'

'

'

'

Excess tax benefits from share-based compensation

6

10

0

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options

$13.40

$17.30

$34.90

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation Arrangement by Share-based Payment Award, Contractual Term, Maximum

'

'

'

'

'

'

'P10Y

'

'

'

'

'

'

'

'

'

'

'

ShareBased_Compensation_Restri

Share-Based Compensation Restricted Stock (Details) (USD $)	12 Months Ended
In Millions, except Share data, unless otherwise specified	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'		'
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	'3 years		'		'
Restricted Stock, Target Awards, 2012 [Member]	'		'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'		'
Percentage of Award Based on Level of Performance Attained, Current Expected	200.00%		'		'
Unvested, end of period	323,275		'		'
Stock Options [Member]	'		'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'		'
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	'3 years		'		'
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$5		'		'
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	'1 year 5 months		'		'
Restricted Stock [Member]	'		'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'		'
Percentage of Award Based on Level of Performance Attained, Maximum	200.00%		'		'
Percentage of Award Based on Level of Performance Attained, Minimum	0.00%		'		'
Percentage of Performance Based Awards Reflected	100.00%		'		'
Unvested, beginning of period	862,675		'		'
Granted	461,338		410,250		455,958
Vested	-379,843		-495,368		-420,596
Forfeited	-66,610		'		'
Unvested, end of period	877,560	[1]	862,675		'
Unvested, Weighted Average Grant Date Fair Value, beginning of period	$58.66		'		'
Weighted Average Grant Date Fair Value, Granted	$71.60		'		'
Weighted Average Grant Date Fair Value, Vested	$43.69		'		'
Weighted Average Grant Date Fair Value, Forfeited	$66.42		'		'
Unvested, Weighted Average Grant Date Fair Value, end of period	$71.35	[1]	$58.66		'
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	43.9		'		'
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	'1 year 6 months		'		'
Aggregate fair value of vested restricted stock	$26.60		$33.60		$28
Restricted Stock, Non-Employee Directors [Member]	'		'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'		'
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	'1 year		'		'
Granted	11,925	[2]	20,700	[2]	20,155	[2]
Restricted Stock, Fiscal 2010 Target Awards, Issued and Vested in 2013 [Member]	'		'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'		'
Percentage of Awarded Based on Performance Level Achieved	150.00%		'		'
Restricted Stock, Attainment of Performance Conditio in Excess of Target [Member]	'		'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'		'
Granted	120,293	[3]	0		173,028	[3]
Restricted Stock, Service Condition and Cash Flow to Equity Ratio Performance Condition at Target [Member]	'		'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'		'
Granted	314,120	[4]	389,550	[4]	262,775	[4]
Restricted Stock, Target Awards, Issued, Not Yet Vested [Member]	'		'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'		'
Common Stock, Shares, Issued	100,000		100,000		'
Restricted Stock Target Awards Potentially Issuable [Member]	'		'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'		'
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	800,000		'		'
Restricted Stock, Target Awards, 2011 [Member]	'		'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'		'
Percentage of Award Based on Level of Performance Attained, Current Expected	100.00%		'		'
Unvested, end of period	225,000		'		'
Restricted Stock, Fiscal 2008 and 2009 Target Awards, Issued or Issued and Vested in 2011 [Member]	'		'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'		'
Percentage of Awarded Based on Performance Level Achieved	'		'		150.00%
Restricted Stock, Target Awards [Member]	'		'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'		'
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	'3 years		'		'
Restricted Stock, Target Awards, 2013 [Member]	'		'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'		'
Percentage of Award Based on Level of Performance Attained, Current Expected	200.00%		'		'
Unvested, end of period	302,360		'		'
Restricted Stock with Service Condition [Member]	'		'		'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'		'		'
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	'4 years		'		'
Granted	15,000	[5]	0		0
[1]	Target awards, net of subsequent forfeitures, granted in fiscal 2013, 2012 and 2011 of 302,360, 323,275 and 225,000 shares, respectively, may be increased to 200% of the target or decreased to zero, subject to the level of performance attained. The awards are reflected in the table at the target award amount of 100%. Based on current facts and assumptions we are forecasting the performance of the fiscal 2013, fiscal 2012 and fiscal 2011 grants to be attained at approximately 200%, 200% and 100% of target, respectively. However, it is possible that the performance attained may vary.
[2]	Non-employee director grants vest over one year and are deemed issued on the grant date and have voting and dividend rights. Also includes converted restricted stock units held by the Smurfit-Stone directors who served on the RockTenn board of directors in fiscal 2011.
[3]	Shares issued in fiscal 2013 for the fiscal 2010 Cash Flow to Equity Ratio were at 150% of target. Shares issued in fiscal 2011 for the fiscal 2009 Cash Flow to Equity Ratio, the fiscal 2008 Annual Average Return over Capital Costs and the fiscal 2008 Total Shareholder Return were each at 150% of target.
[4]	These employee grants vest over approximately three years and have adjustable ranges from 0-200% of target subject to the level of performance attained in the respective award agreement.
[5]	These shares vest over four years.

ShareBased_Compensation_Employ

Share-Based Compensation Employee Stock Purchase Plan (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share-based compensation expense	$46.50	$29.20	$21.40
Employee Stock Purchase Plan [Member]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Purchase Date	15.00%	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	4.3	'	'
Stock Issued During Period, Shares, Employee Stock Purchase Plans	0.1	0.1	0.1
Share-based compensation expense	$0.70	$0.60	$0.50
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	0.7	'	'

Related_Party_Transactions_Det

Related Party Transactions (Details) (Affiliated Entity [Member], USD $)	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Affiliated Entity [Member]	'	'	'
Related Party Transaction [Line Items]	'	'	'
Net sales to affiliated companies	$308.70	$353.30	$156.60
Accounts receivable due from affiliated companies	$59.90	$38.50	'

Commitments_and_Contingencies_

Commitments and Contingencies (Details) (USD $)	Sep. 30, 2013
In Millions, unless otherwise specified	T
Commitments and Contingencies [Line Items]	'
Number of tons of CO2 equal to or greater than produced by facility subject to EPA rule	25,000
Accrual for Environmental Loss Contingencies	$4.30
Financial Guarantee [Member]	'
Commitments and Contingencies [Line Items]	'
Guarantor Obligations, Maximum Exposure, Undiscounted	7
Seven Hills [Member]	'
Commitments and Contingencies [Line Items]	'
Equity Method Investment, Ownership Percentage	49.00%
Unrecorded Contingent Purchase Obligation, Amount	11
Percent of Ownership Acquired, Contingent Purchase Obligation	54.00%
Equity Method Investees [Member] | Financial Guarantee [Member]	'
Commitments and Contingencies [Line Items]	'
Guarantor Obligations, Maximum Exposure, Undiscounted	5
Other Long Term Liabilities [Member]	'
Commitments and Contingencies [Line Items]	'
Accrual for Environmental Loss Contingencies	3.1
Other Current Liabilities [Member]	'
Commitments and Contingencies [Line Items]	'
Accrual for Environmental Loss Contingencies	1.2
Capital Addition Purchase Commitments [Member]	'
Commitments and Contingencies [Line Items]	'
Long-term Purchase Commitment, Estimated Amount	$98.70

Segment_Information_Details

Segment Information (Details) (USD $)

3 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

12 Months Ended

In Millions, unless otherwise specified

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2010

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2010

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2010

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2010

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2010

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Operating Segments [Member]

Operating Segments [Member]

Operating Segments [Member]

Operating Segments [Member]

Corrugated Packaging [Member]

Corrugated Packaging [Member]

Corrugated Packaging [Member]

Corrugated Packaging [Member]

Consumer Packaging [Member]

Consumer Packaging [Member]

Consumer Packaging [Member]

Consumer Packaging [Member]

Merchandising Displays [Member]

Merchandising Displays [Member]

Merchandising Displays [Member]

Merchandising Displays [Member]

Recycling [Member]

Recycling [Member]

Recycling [Member]

Recycling [Member]

Assets Held-for-sale [Member]

Assets Held-for-sale [Member]

Assets Held-for-sale [Member]

Corporate Segment [Member]

Corporate Segment [Member]

Corporate Segment [Member]

Segment Reporting Information [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Net sales (aggregate)

'

'

'

'

'

'

'

'

'

'

'

$9,729.10

$9,395.20

$5,527.90

'

$6,661.70

$6,169.40

$2,766.30

'

$1,898.70

$1,919.30

$1,910.30

'

$674.60

$656

$468

'

$494.10

$650.50

$383.30

'

'

'

'

'

'

'

Less net sales (intersegment)

'

'

'

'

'

'

'

'

'

'

'

183.7

187.6

128.3

'

115.6

122.3

81.7

'

25.1

25.9

28.4

'

17.1

14.6

11.2

'

25.9

24.8

7

'

'

'

'

'

'

'

Net sales

2,485.10

2,448.30

2,324.90

2,287.10

2,353.80

2,303.20

2,282.90

2,267.70

9,545.40

9,207.60

5,399.60

9,545.40

9,207.60

5,399.60

'

6,546.10

6,047.10

2,684.60

'

1,873.60

1,893.40

1,881.90

'

657.5

641.4

456.8

'

468.2

625.7

376.3

'

'

'

'

'

'

'

Segment Reporting Information, Segment Income

'

'

'

'

'

'

'

'

988.9

718.3

531.7

'

'

'

'

678.8

363.7

241.1

'

231.3

277.2

222.6

'

64.4

70.3

53.2

'

14.4

7.1

14.8

'

'

'

'

'

'

'

Restructuring and other costs, net

-26

-23.5

-12.4

-16.1

-23.1

-13.7

-28.1

-10.3

-78

-75.2

-93.3

'

'

'

'

-43.5

[1]

-40.9

[1]

-27.5

[1]

'

-3.5

[2]

2.4

[2]

-5.1

[2]

'

'

'

'

'

-10.3

[3]

-2.3

[3]

-0.1

[3]

'

'

'

'

'

'

'

Non-allocated expenses

'

'

'

'

'

'

'

'

-92.1

-109.7

-79.5

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest expense

'

'

'

'

'

'

'

'

-106.9

-119.7

-88.9

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Loss on extinguishment of debt

0

0

-0.1

-0.2

-6.3

-0.1

-19.5

0

-0.3

-25.9

-39.5

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Interest income and other (expense) income, net

'

'

'

'

'

'

'

'

-0.9

1.3

-15

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Income before income taxes

'

'

'

'

'

'

'

'

710.7

389.1

215.5

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Identifiable assets

10,733.40

'

'

'

10,687.10

'

'

'

10,733.40

10,687.10

10,566

'

'

'

'

8,233.80

8,297.10

8,155.50

'

1,464.40

1,454.10

1,452.10

'

349.9

304.6

283.3

'

231.7

248.9

308.3

'

14.3

9.6

31.9

439.3

372.8

334.9

Goodwill

1,862.10

'

'

'

1,865.30

'

'

'

1,862.10

1,865.30

'

1,862.10

1,865.30

1,839.40

748.8

1,447

1,448.20

1,427.40

392.1

327.6

329.6

326.8

327.7

34.6

34.6

33.9

28.8

52.9

52.9

51.3

0.2

'

'

'

'

'

'

Goodwill, Gross

'

'

'

'

'

'

'

'

'

'

'

1,904.90

1,908.10

1,882.20

791.6

1,447

1,448.20

1,427.40

392.1

370.3

372.3

369.5

370.4

34.7

34.7

34

28.9

52.9

52.9

51.3

0.2

'

'

'

'

'

'

Depreciation, depletion and amortization

'

'

'

'

'

'

'

'

552.2

534.3

278.3

'

'

'

'

426.7

410.5

163.6

'

88.8

86.2

85.4

'

10.8

10.7

6.9

'

12.7

13.4

5

'

'

'

'

13.2

13.5

17.4

Capital expenditures

'

'

'

'

'

'

'

'

$440.40

$452.40

$199.40

'

'

'

'

$306.10

$327.70

$74.30

'

$83.50

$75.80

$100.90

'

$17.10

$8

$5.40

'

$11.30

$10.30

$14

'

'

'

'

$22.40

$30.60

$4.80

[1]

The Corrugated Packaging segment current year charges are primarily associated with the closure of seven corrugated container plants acquired in the Smurfit-Stone Acquisition, on-going closure costs at previously closed facilities including the Matane, Quebec containerboard mill also acquired in the Smurfit-Stone Acquisition which were partially offset by gains on sale of previously closed facilities. The Corrugated Packaging segment charges in fiscal 2012 primarily reflect the closure of our Matane, Quebec containerboard mill, a machine taken out of operation at our Hodge, LA containerboard mill and seven corrugated container plants, all acquired in the Smurfit-Stone Acquisition and charges associated primarily with on-going closure costs at previously closed corrugated container plants acquired in the Smurfit-Stone Acquisition and our legacy Hauppauge, NY sheet plant, net of a gain on sale in fiscal 2012 primarily for our Santa Fe Springs, CA corrugated converting facility. The Corrugated Packaging Segment charges in fiscal 2011 primarily reflect the closure of six corrugated container plants also acquired in the Smurfit-Stone Acquisition. The fiscal 2012 expenses in the “Other Costs” column primarily represent repayment of energy credits and site environmental closure activities at the Matane mill. The cumulative charges primarily reflect charges associated with the closure of twenty corrugated container plants acquired in the Smurfit-Stone Acquisition, the closure of the Matane, Quebec containerboard mill, charges related to kraft paper assets at our Hodge containerboard mill we acquired in the Smurfit-Stone Acquisition, and gains and losses associated with the sale of closed facilities. We have transferred a substantial portion of each closed facility's production to our other facilities.

[2]

The Consumer Packaging segment current year charges are primarily associated with the closure of a converting facility and on-going closure costs for previously closed facilities. The Consumer Packaging segment charges in fiscal 2012 primarily reflect the gain on sale of our Columbus, IN laminated paperboard converting operation and Milwaukee, WI folding carton facility and on-going closure costs associated with previously closed facilities. The Consumer Packaging segment charges in fiscal 2011 primarily reflect the closure of two facilities and on-going closure costs for previously closed facilities. The cumulative charges primarily reflect the actions mentioned above as well as closure costs at certain of five interior packaging plants. We have transferred a substantial portion of each closed facility's production to our other facilities.

[3]

The Recycling segment current year charges are primarily associated with the closure of nine collection facilities acquired in the Smurfit-Stone Acquisition partially offset by the gain on sale of our Dallas, TX collection facility. The Recycling segment charges in fiscal 2012 primarily reflect the closure of six collection facilities also acquired in the Smurfit-Stone Acquisition and the cumulative charges reflect the preceding actions as well as carrying costs for two collections facilities shutdown in a prior year.

Segment_Information_Segment_In

Segment Information Segment Information, Geographical Information (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Revenues from External Customers, Segment Income and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	$2,485.10	$2,448.30	$2,324.90	$2,287.10	$2,353.80	$2,303.20	$2,282.90	$2,267.70	$9,545.40	$9,207.60	$5,399.60
Segment Reporting Information, Segment Income	'	'	'	'	'	'	'	'	988.9	718.3	531.7
Foreign Operations [Member]	'	'	'	'	'	'	'	'	'	'	'
Revenues from External Customers, Segment Income and Long-Lived Assets [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	1,272.50	1,238.60	639
Segment Reporting Information, Segment Income	'	'	'	'	'	'	'	'	95.9	48.7	62.1
Long-Lived Assets	$444.60	'	'	'	$496.70	'	'	'	$444.60	$496.70	$513.10
Segment Reporting Information, Percentage of Net Sales to Unaffiliated Customers	'	'	'	'	'	'	'	'	13.30%	13.50%	11.80%
Segment Reporting Information, Percentage of Segment Income	'	'	'	'	'	'	'	'	9.70%	6.80%	11.70%
Segment Reporting Information, Percentage of Long-Lived Assets	8.00%	'	'	'	8.90%	'	'	'	8.00%	8.90%	9.30%

Segment_Information_Changes_in

Segment Information Changes in Carrying Amount of Goodwill (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Goodwill [Roll Forward]	'	'	'
Goodwill, end of period	$1,862.10	$1,865.30	'
Operating Segments [Member]	'	'	'
Goodwill [Roll Forward]	'	'	'
Goodwill, Gross beginning of period	1,908.10	1,882.20	791.6
Accumulated impairment losses, beginning of period	-42.8	-42.8	-42.8
Goodwill, beginning of period	1,865.30	1,839.40	748.8
Goodwill acquired	1.2	33.5	1,091.60
Purchase price allocation adjustments	'	-10.9	'
Translation adjustment	-4.4	3.3	-1
Goodwill, Gross end of period	1,904.90	1,908.10	1,882.20
Accumulated impairment losses, end of period	-42.8	-42.8	-42.8
Goodwill, end of period	1,862.10	1,865.30	1,839.40
Corrugated Packaging [Member]	'	'	'
Goodwill [Roll Forward]	'	'	'
Goodwill, Gross beginning of period	1,448.20	1,427.40	392.1
Accumulated impairment losses, beginning of period	0	0	0
Goodwill, beginning of period	1,448.20	1,427.40	392.1
Goodwill acquired	1.2	33.5	1,035.40
Purchase price allocation adjustments	'	-13.2	'
Translation adjustment	-2.4	0.5	-0.1
Goodwill, Gross end of period	1,447	1,448.20	1,427.40
Accumulated impairment losses, end of period	0	0	0
Goodwill, end of period	1,447	1,448.20	1,427.40
Consumer Packaging [Member]	'	'	'
Goodwill [Roll Forward]	'	'	'
Goodwill, Gross beginning of period	372.3	369.5	370.4
Accumulated impairment losses, beginning of period	-42.7	-42.7	-42.7
Goodwill, beginning of period	329.6	326.8	327.7
Goodwill acquired	0	0	0
Purchase price allocation adjustments	'	0	'
Translation adjustment	-2	2.8	-0.9
Goodwill, Gross end of period	370.3	372.3	369.5
Accumulated impairment losses, end of period	-42.7	-42.7	-42.7
Goodwill, end of period	327.6	329.6	326.8
Merchandising Displays [Member]	'	'	'
Goodwill [Roll Forward]	'	'	'
Goodwill, Gross beginning of period	34.7	34	28.9
Accumulated impairment losses, beginning of period	-0.1	-0.1	-0.1
Goodwill, beginning of period	34.6	33.9	28.8
Goodwill acquired	0	0	5.1
Purchase price allocation adjustments	'	0.7	'
Translation adjustment	0	0	0
Goodwill, Gross end of period	34.7	34.7	34
Accumulated impairment losses, end of period	-0.1	-0.1	-0.1
Goodwill, end of period	34.6	34.6	33.9
Recycling [Member]	'	'	'
Goodwill [Roll Forward]	'	'	'
Goodwill, Gross beginning of period	52.9	51.3	0.2
Accumulated impairment losses, beginning of period	0	0	0
Goodwill, beginning of period	52.9	51.3	0.2
Goodwill acquired	0	0	51.1
Purchase price allocation adjustments	'	1.6	'
Translation adjustment	0	0	0
Goodwill, Gross end of period	52.9	52.9	51.3
Accumulated impairment losses, end of period	0	0	0
Goodwill, end of period	$52.90	$52.90	$51.30

Financial_Results_by_Quarter_U2

Financial Results by Quarter (Unaudited) (Details) (USD $)

3 Months Ended

12 Months Ended

In Millions, except Per Share data, unless otherwise specified

Sep. 30, 2013

Jun. 30, 2013

Mar. 31, 2013

Dec. 31, 2012

Sep. 30, 2012

Jun. 30, 2012

Mar. 31, 2012

Dec. 31, 2011

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2011

Net sales

$2,485.10

$2,448.30

$2,324.90

$2,287.10

$2,353.80

$2,303.20

$2,282.90

$2,267.70

$9,545.40

$9,207.60

$5,399.60

Gross profit

555.1

496.7

385.2

409.5

419.9

359.8

360.8

392.2

1,846.50

1,532.70

991.9

Restructuring and other costs, net

26

23.5

12.4

16.1

23.1

13.7

28.1

10.3

78

75.2

93.3

Loss on extinguishment of debt

0

0

-0.1

-0.2

-6.3

-0.1

-19.5

0

-0.3

-25.9

-39.5

Income (loss) before income taxes

256.8

203.1

109.1

141.7

120.8

90.6

53.3

124.4

710.7

389.1

215.5

Consolidated net income (loss)

178.3

141.7

325.6

86.9

83.4

59.3

32.7

76.8

732.5

252.2

146

Net income (loss) attributable to Rock-Tenn Company shareholders

176.5

140.1

324.7

86

82.3

58.2

31.9

76.7

727.3

249.1

141.1

Basic earnings (loss) per share attributable to Rock-Tenn Company shareholders

$2.45

$1.94

$4.51

$1.20

$1.15

$0.82

$0.45

$1.08

$10.10

$3.49

$2.81

Diluted earnings (loss) per share attributable to Rock-Tenn Company shareholders

$2.40

$1.91

$4.45

$1.18

$1.14

$0.81

$0.44

$1.06

$9.95

$3.45

$2.77

Increase in State Tax Valuation Allowance

'

'

1.2

'

'

'

'

'

'

'

'

Reduction in Amortization Expense Related to a Restructuring and Extension of a Steam Supply Contract

'

11.4

'

'

'

'

'

'

'

'

'

Basic and Diluted Earnings Per Share, Increase Due to Reduction in Amortization Expense Related to a Restructuring and Extension of a Steam Supply Contract

'

$0.10

'

'

'

'

'

'

'

'

'

Gain Related to Spare Parts Identified Following Acquisition

12.2

'

'

'

'

'

'

'

'

'

'

Gain on the Termination of a Steam Supply Contract

9.2

'

'

'

'

'

'

'

'

'

'

Gain on Partial Insurance Settlement of Property Damage Claims

8

'

'

'

'

'

'

'

'

'

'

Basic and Diluted Earnings Per Share, Increase Due to Spare Parts Gain, Steam Contract Termination Gain and Partial Insurance Settlement Gain

$0.26

'

'

'

'

'

'

'

'

'

'

Gain (Loss) Related to Litigation Settlement

'

'

'

'

18.2

'

'

'

'

'

'

Basic and Diluted Earnings Per Share, Increase Due to Settlement of Paperboard Supply Agreement, Net of Legal Fees

'

'

'

'

$0.16

'

'

'

'

'

'

Corrugated Packaging [Member]

'

'

'

'

'

'

'

'

'

'

'

Net sales

'

'

'

'

'

'

'

'

6,546.10

6,047.10

2,684.60

Restructuring and other costs, net

'

'

'

'

'

'

'

'

43.5

[1]

40.9

[1]

27.5

[1]

Consumer Packaging [Member]

'

'

'

'

'

'

'

'

'

'

'

Net sales

'

'

'

'

'

'

'

'

1,873.60

1,893.40

1,881.90

Restructuring and other costs, net

'

'

'

'

'

'

'

'

3.5

[2]

-2.4

[2]

5.1

[2]

Smurfit Stone [Member]

'

'

'

'

'

'

'

'

'

'

'

Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions

'

'

$254.10

'

'

'

'

'

$254.10

'

'

Basic Earnings Per Share, Increase Due to Reversal of Tax Reserves Related to Alternative Fuel Mixture Credits

'

'

$3.51

'

'

'

'

'

'

'

'

Diluted Earnings Per Share, Increase Due to Reversal of Tax Reserves Related to Alternative Fuel Mixture Credits

'

'

$3.47

'

'

'

'

'

'

'

'

[1]

The Corrugated Packaging segment current year charges are primarily associated with the closure of seven corrugated container plants acquired in the Smurfit-Stone Acquisition, on-going closure costs at previously closed facilities including the Matane, Quebec containerboard mill also acquired in the Smurfit-Stone Acquisition which were partially offset by gains on sale of previously closed facilities. The Corrugated Packaging segment charges in fiscal 2012 primarily reflect the closure of our Matane, Quebec containerboard mill, a machine taken out of operation at our Hodge, LA containerboard mill and seven corrugated container plants, all acquired in the Smurfit-Stone Acquisition and charges associated primarily with on-going closure costs at previously closed corrugated container plants acquired in the Smurfit-Stone Acquisition and our legacy Hauppauge, NY sheet plant, net of a gain on sale in fiscal 2012 primarily for our Santa Fe Springs, CA corrugated converting facility. The Corrugated Packaging Segment charges in fiscal 2011 primarily reflect the closure of six corrugated container plants also acquired in the Smurfit-Stone Acquisition. The fiscal 2012 expenses in the “Other Costs” column primarily represent repayment of energy credits and site environmental closure activities at the Matane mill. The cumulative charges primarily reflect charges associated with the closure of twenty corrugated container plants acquired in the Smurfit-Stone Acquisition, the closure of the Matane, Quebec containerboard mill, charges related to kraft paper assets at our Hodge containerboard mill we acquired in the Smurfit-Stone Acquisition, and gains and losses associated with the sale of closed facilities. We have transferred a substantial portion of each closed facility's production to our other facilities.

[2]

The Consumer Packaging segment current year charges are primarily associated with the closure of a converting facility and on-going closure costs for previously closed facilities. The Consumer Packaging segment charges in fiscal 2012 primarily reflect the gain on sale of our Columbus, IN laminated paperboard converting operation and Milwaukee, WI folding carton facility and on-going closure costs associated with previously closed facilities. The Consumer Packaging segment charges in fiscal 2011 primarily reflect the closure of two facilities and on-going closure costs for previously closed facilities. The cumulative charges primarily reflect the actions mentioned above as well as closure costs at certain of five interior packaging plants. We have transferred a substantial portion of each closed facility's production to our other facilities.

Selected_Condensed_Consolidati2

Selected Condensed Consolidating Financial Statements of Parent, Guarantors and Non-Guarantors Guarantor Financial Data (Income Statement) (Details) (USD $)	3 Months Ended								12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	$2,485.10	$2,448.30	$2,324.90	$2,287.10	$2,353.80	$2,303.20	$2,282.90	$2,267.70	$9,545.40	$9,207.60	$5,399.60
Cost of goods sold	'	'	'	'	'	'	'	'	7,698.90	7,674.90	4,407.70
Gross profit	555.1	496.7	385.2	409.5	419.9	359.8	360.8	392.2	1,846.50	1,532.70	991.9
Selling, general and administrative expenses	'	'	'	'	'	'	'	'	954.3	927.5	541.2
Restructuring and other costs, net	26	23.5	12.4	16.1	23.1	13.7	28.1	10.3	78	75.2	93.3
Operating profit	'	'	'	'	'	'	'	'	814.2	530	357.4
Interest expense	'	'	'	'	'	'	'	'	-106.9	-119.7	-88.9
Loss on extinguishment of debt	0	0	-0.1	-0.2	-6.3	-0.1	-19.5	0	-0.3	-25.9	-39.5
Interest income and other (expense) income, net	'	'	'	'	'	'	'	'	-0.9	1.3	-15
Equity in income of unconsolidated entities	'	'	'	'	'	'	'	'	4.6	3.4	1.5
Equity in income of consolidated entities	'	'	'	'	'	'	'	'	0	0	0
Income before income taxes	256.8	203.1	109.1	141.7	120.8	90.6	53.3	124.4	710.7	389.1	215.5
Income tax benefit (expense)	'	'	'	'	'	'	'	'	21.8	-136.9	-69.5
Consolidated net income	178.3	141.7	325.6	86.9	83.4	59.3	32.7	76.8	732.5	252.2	146
Less: Net income attributable to noncontrolling interests	'	'	'	'	'	'	'	'	-5.2	-3.1	-4.9
Net income attributable to Rock-Tenn Company shareholders	176.5	140.1	324.7	86	82.3	58.2	31.9	76.7	727.3	249.1	141.1
Comprehensive income (loss) attributable to Rock-Tenn Company shareholders	'	'	'	'	'	'	'	'	927.3	47.8	-65.9
Parent Company [Member]	'	'	'	'	'	'	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	-0.1	0.1	0.5
Cost of goods sold	'	'	'	'	'	'	'	'	0	0	0.6
Gross profit	'	'	'	'	'	'	'	'	-0.1	0.1	-0.1
Selling, general and administrative expenses	'	'	'	'	'	'	'	'	0	2.3	1.7
Restructuring and other costs, net	'	'	'	'	'	'	'	'	-3.6	2.6	19.4
Operating profit	'	'	'	'	'	'	'	'	3.5	-4.8	-21.2
Interest expense	'	'	'	'	'	'	'	'	-103.1	-106.4	-84.2
Loss on extinguishment of debt	'	'	'	'	'	'	'	'	-0.1	-25.9	-38.6
Interest income and other (expense) income, net	'	'	'	'	'	'	'	'	52.1	51.7	61.5
Equity in income of unconsolidated entities	'	'	'	'	'	'	'	'	0	0	0
Equity in income of consolidated entities	'	'	'	'	'	'	'	'	753.8	302.4	191.2
Income before income taxes	'	'	'	'	'	'	'	'	706.2	217	108.7
Income tax benefit (expense)	'	'	'	'	'	'	'	'	21.1	32.1	32.4
Consolidated net income	'	'	'	'	'	'	'	'	727.3	249.1	141.1
Less: Net income attributable to noncontrolling interests	'	'	'	'	'	'	'	'	0	0	0
Net income attributable to Rock-Tenn Company shareholders	'	'	'	'	'	'	'	'	727.3	249.1	141.1
Comprehensive income (loss) attributable to Rock-Tenn Company shareholders	'	'	'	'	'	'	'	'	927.3	47.8	-65.9
Guarantor Subsidiaries [Member]	'	'	'	'	'	'	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	8,553.10	8,225.30	4,815.60
Cost of goods sold	'	'	'	'	'	'	'	'	6,855.70	6,816.50	3,932.60
Gross profit	'	'	'	'	'	'	'	'	1,697.40	1,408.80	883
Selling, general and administrative expenses	'	'	'	'	'	'	'	'	839.7	797.7	447.6
Restructuring and other costs, net	'	'	'	'	'	'	'	'	67.3	47.6	72.7
Operating profit	'	'	'	'	'	'	'	'	790.4	563.5	362.7
Interest expense	'	'	'	'	'	'	'	'	-48.1	-46.3	-125.1
Loss on extinguishment of debt	'	'	'	'	'	'	'	'	0	0	-0.9
Interest income and other (expense) income, net	'	'	'	'	'	'	'	'	-126.7	-147	-40.4
Equity in income of unconsolidated entities	'	'	'	'	'	'	'	'	4.6	3.4	1.9
Equity in income of consolidated entities	'	'	'	'	'	'	'	'	77.4	15.7	44.6
Income before income taxes	'	'	'	'	'	'	'	'	697.6	389.3	242.8
Income tax benefit (expense)	'	'	'	'	'	'	'	'	26	-134.9	-73
Consolidated net income	'	'	'	'	'	'	'	'	723.6	254.4	169.8
Less: Net income attributable to noncontrolling interests	'	'	'	'	'	'	'	'	-4	-2.7	-4.9
Net income attributable to Rock-Tenn Company shareholders	'	'	'	'	'	'	'	'	719.6	251.7	164.9
Comprehensive income (loss) attributable to Rock-Tenn Company shareholders	'	'	'	'	'	'	'	'	920.3	46.7	-45.6
Non-Guarantor Subsidiaries [Member]	'	'	'	'	'	'	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	1,674.90	1,648.30	956.1
Cost of goods sold	'	'	'	'	'	'	'	'	1,383	1,366.10	738.8
Gross profit	'	'	'	'	'	'	'	'	291.9	282.2	217.3
Selling, general and administrative expenses	'	'	'	'	'	'	'	'	114.6	127.5	91.9
Restructuring and other costs, net	'	'	'	'	'	'	'	'	14.3	25	1.2
Operating profit	'	'	'	'	'	'	'	'	163	129.7	124.2
Interest expense	'	'	'	'	'	'	'	'	-26	-29.4	-21.7
Loss on extinguishment of debt	'	'	'	'	'	'	'	'	-0.2	0	0
Interest income and other (expense) income, net	'	'	'	'	'	'	'	'	1.3	0.6	-2.3
Equity in income of unconsolidated entities	'	'	'	'	'	'	'	'	0	0	-0.4
Equity in income of consolidated entities	'	'	'	'	'	'	'	'	0	0	0.1
Income before income taxes	'	'	'	'	'	'	'	'	138.1	100.9	99.9
Income tax benefit (expense)	'	'	'	'	'	'	'	'	-25.3	-34.1	-28.9
Consolidated net income	'	'	'	'	'	'	'	'	112.8	66.8	71
Less: Net income attributable to noncontrolling interests	'	'	'	'	'	'	'	'	-1.2	-0.4	0
Net income attributable to Rock-Tenn Company shareholders	'	'	'	'	'	'	'	'	111.6	66.4	71
Comprehensive income (loss) attributable to Rock-Tenn Company shareholders	'	'	'	'	'	'	'	'	84.2	63.6	21.7
Consolidation, Eliminations [Member]	'	'	'	'	'	'	'	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'	'	'	'	'	'	'	'
Net sales	'	'	'	'	'	'	'	'	-682.5	-666.1	-372.6
Cost of goods sold	'	'	'	'	'	'	'	'	-539.8	-507.7	-264.3
Gross profit	'	'	'	'	'	'	'	'	-142.7	-158.4	-108.3
Selling, general and administrative expenses	'	'	'	'	'	'	'	'	0	0	0
Restructuring and other costs, net	'	'	'	'	'	'	'	'	0	0	0
Operating profit	'	'	'	'	'	'	'	'	-142.7	-158.4	-108.3
Interest expense	'	'	'	'	'	'	'	'	70.3	62.4	142.1
Loss on extinguishment of debt	'	'	'	'	'	'	'	'	0	0	0
Interest income and other (expense) income, net	'	'	'	'	'	'	'	'	72.4	96	-33.8
Equity in income of unconsolidated entities	'	'	'	'	'	'	'	'	0	0	0
Equity in income of consolidated entities	'	'	'	'	'	'	'	'	-831.2	-318.1	-235.9
Income before income taxes	'	'	'	'	'	'	'	'	-831.2	-318.1	-235.9
Income tax benefit (expense)	'	'	'	'	'	'	'	'	0	0	0
Consolidated net income	'	'	'	'	'	'	'	'	-831.2	-318.1	-235.9
Less: Net income attributable to noncontrolling interests	'	'	'	'	'	'	'	'	0	0	0
Net income attributable to Rock-Tenn Company shareholders	'	'	'	'	'	'	'	'	-831.2	-318.1	-235.9
Comprehensive income (loss) attributable to Rock-Tenn Company shareholders	'	'	'	'	'	'	'	'	($1,004.50)	($110.30)	$23.90

Selected_Condensed_Consolidati3

Selected Condensed Consolidating Financial Statements of Parent, Guarantors and Non-Guarantors Guarantor Financial Data (Balance Sheet) (Details) (USD $)	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
In Millions, unless otherwise specified
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Cash and cash equivalents	$36.40	$37.20	$41.70	$15.90
Restricted cash	9.3	40.6	'	'
Accounts receivable, net	1,134.90	1,075.60	'	'
Inventories	937.9	861.9	'	'
Other current assets	297.9	174.5	'	'
Intercompany receivables	0	0	'	'
Total current assets	2,416.40	2,189.80	'	'
Net property, plant and equipment	5,554.70	5,611.40	'	'
Goodwill	1,862.10	1,865.30	'	'
Intangibles, net	699.4	795.1	'	'
Intercompany notes receivable	0	0	'	'
Investments in consolidated subsidiaries	0	0	'	'
Other assets	200.8	225.5	'	'
Assets	10,733.40	10,687.10	10,566	'
Current portion of debt	2.9	261.3	'	'
Accounts payable	802.1	708.9	'	'
Accrued compensation and benefits	249	211.4	'	'
Other current liabilities	189.4	226.7	'	'
Intercompany payables	0	0	'	'
Total current liabilities	1,243.40	1,408.30	'	'
Long-term debt due after one year	2,841.90	3,151.20	'	'
Intercompany notes payable	0	0	'	'
Pension liabilities, net of current portion	975.2	1,493.10	'	'
Postretirement benefit liabilities, net of current portion	118.3	154.2	'	'
Deferred income taxes	1,063.10	888.8	'	'
Other long-term liabilities	165.4	173.9	'	'
Redeemable noncontrolling interests	13.3	11.4	'	'
Total Rock-Tenn Company Shareholders’ equity	4,312.30	3,405.70	3,371.60	'
Noncontrolling interests	0.5	0.5	'	'
Total equity	4,312.80	3,406.20	3,372.30	'
Liabilities and Equity	10,733.40	10,687.10	'	'
Parent Company [Member]	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Cash and cash equivalents	14.8	0	0	0
Restricted cash	9.3	40.6	'	'
Accounts receivable, net	0	0	'	'
Inventories	0	0	'	'
Other current assets	20.3	33.2	'	'
Intercompany receivables	56.3	396.8	'	'
Total current assets	100.7	470.6	'	'
Net property, plant and equipment	0	0	'	'
Goodwill	0	0	'	'
Intangibles, net	0	0	'	'
Intercompany notes receivable	503.5	768	'	'
Investments in consolidated subsidiaries	6,230.40	5,642.30	'	'
Other assets	42.2	42.9	'	'
Assets	6,876.80	6,923.80	'	'
Current portion of debt	0	202.9	'	'
Accounts payable	0	0	'	'
Accrued compensation and benefits	0	0	'	'
Other current liabilities	15.3	43.7	'	'
Intercompany payables	0.5	602.4	'	'
Total current liabilities	15.8	849	'	'
Long-term debt due after one year	2,391.10	2,555.70	'	'
Intercompany notes payable	152.9	109.3	'	'
Pension liabilities, net of current portion	0	0	'	'
Postretirement benefit liabilities, net of current portion	0	0	'	'
Deferred income taxes	0	0	'	'
Other long-term liabilities	4.7	4.1	'	'
Redeemable noncontrolling interests	0	0	'	'
Total Rock-Tenn Company Shareholders’ equity	4,312.30	3,405.70	'	'
Noncontrolling interests	0	0	'	'
Total equity	4,312.30	3,405.70	'	'
Liabilities and Equity	6,876.80	6,923.80	'	'
Guarantor Subsidiaries [Member]	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Cash and cash equivalents	1.2	0	3.6	0.6
Restricted cash	0	0	'	'
Accounts receivable, net	84.7	110.5	'	'
Inventories	779.6	700.1	'	'
Other current assets	265.7	142.8	'	'
Intercompany receivables	26.8	793.1	'	'
Total current assets	1,158	1,746.50	'	'
Net property, plant and equipment	5,098.50	5,102.90	'	'
Goodwill	1,762.60	1,761.40	'	'
Intangibles, net	688.2	782.9	'	'
Intercompany notes receivable	645.9	403.3	'	'
Investments in consolidated subsidiaries	364	365.8	'	'
Other assets	124.9	123.6	'	'
Assets	9,842.10	10,286.40	'	'
Current portion of debt	0	0	'	'
Accounts payable	733.2	642.4	'	'
Accrued compensation and benefits	220.9	178.2	'	'
Other current liabilities	148.8	160.7	'	'
Intercompany payables	76.6	658	'	'
Total current liabilities	1,179.50	1,639.30	'	'
Long-term debt due after one year	0	0	'	'
Intercompany notes payable	469.1	733.9	'	'
Pension liabilities, net of current portion	811.8	1,283	'	'
Postretirement benefit liabilities, net of current portion	74.3	102.1	'	'
Deferred income taxes	1,061	861.3	'	'
Other long-term liabilities	157.4	166.5	'	'
Redeemable noncontrolling interests	8.1	7.5	'	'
Total Rock-Tenn Company Shareholders’ equity	6,080.40	5,492.30	'	'
Noncontrolling interests	0.5	0.5	'	'
Total equity	6,080.90	5,492.80	'	'
Liabilities and Equity	9,842.10	10,286.40	'	'
Non-Guarantor Subsidiaries [Member]	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Cash and cash equivalents	20.4	37.2	38.1	15.3
Restricted cash	0	0	'	'
Accounts receivable, net	1,098	1,026.60	'	'
Inventories	158.3	161.8	'	'
Other current assets	32.1	25.7	'	'
Intercompany receivables	44.5	148.2	'	'
Total current assets	1,353.30	1,399.50	'	'
Net property, plant and equipment	456.2	508.5	'	'
Goodwill	99.5	103.9	'	'
Intangibles, net	11.2	12.2	'	'
Intercompany notes receivable	1.3	0.7	'	'
Investments in consolidated subsidiaries	0	0	'	'
Other assets	41.7	59	'	'
Assets	1,963.20	2,083.80	'	'
Current portion of debt	2.9	58.4	'	'
Accounts payable	116.7	128	'	'
Accrued compensation and benefits	28.1	33.2	'	'
Other current liabilities	45.5	49.5	'	'
Intercompany payables	50.5	77.7	'	'
Total current liabilities	243.7	346.8	'	'
Long-term debt due after one year	450.8	595.5	'	'
Intercompany notes payable	528.7	328.8	'	'
Pension liabilities, net of current portion	163.4	210.1	'	'
Postretirement benefit liabilities, net of current portion	44	52.1	'	'
Deferred income taxes	10.1	27.5	'	'
Other long-term liabilities	3.3	3.3	'	'
Redeemable noncontrolling interests	5.2	3.9	'	'
Total Rock-Tenn Company Shareholders’ equity	514	515.8	'	'
Noncontrolling interests	0	0	'	'
Total equity	514	515.8	'	'
Liabilities and Equity	1,963.20	2,083.80	'	'
Consolidation, Eliminations [Member]	'	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'	'
Cash and cash equivalents	0	0	0	0
Restricted cash	0	0	'	'
Accounts receivable, net	-47.8	-61.5	'	'
Inventories	0	0	'	'
Other current assets	-20.2	-27.2	'	'
Intercompany receivables	-127.6	-1,338.10	'	'
Total current assets	-195.6	-1,426.80	'	'
Net property, plant and equipment	0	0	'	'
Goodwill	0	0	'	'
Intangibles, net	0	0	'	'
Intercompany notes receivable	-1,150.70	-1,172	'	'
Investments in consolidated subsidiaries	-6,594.40	-6,008.10	'	'
Other assets	-8	0	'	'
Assets	-7,948.70	-8,606.90	'	'
Current portion of debt	0	0	'	'
Accounts payable	-47.8	-61.5	'	'
Accrued compensation and benefits	0	0	'	'
Other current liabilities	-20.2	-27.2	'	'
Intercompany payables	-127.6	-1,338.10	'	'
Total current liabilities	-195.6	-1,426.80	'	'
Long-term debt due after one year	0	0	'	'
Intercompany notes payable	-1,150.70	-1,172	'	'
Pension liabilities, net of current portion	0	0	'	'
Postretirement benefit liabilities, net of current portion	0	0	'	'
Deferred income taxes	-8	0	'	'
Other long-term liabilities	0	0	'	'
Redeemable noncontrolling interests	0	0	'	'
Total Rock-Tenn Company Shareholders’ equity	-6,594.40	-6,008.10	'	'
Noncontrolling interests	0	0	'	'
Total equity	-6,594.40	-6,008.10	'	'
Liabilities and Equity	($7,948.70)	($8,606.90)	'	'

Selected_Condensed_Consolidati4

Selected Condensed Consolidating Financial Statements of Parent, Guarantors and Non-Guarantors Guarantor Financial Data (Cash Flow) (Details) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Condensed Financial Statements, Captions [Line Items]	'	'	'
Net cash provided by (used for) operating activities	$1,032.50	$656.70	$461.70
Capital expenditures	-440.4	-452.4	-199.4
Cash paid for the purchase of a leased facility	0	-17	0
Cash paid for purchase of business, net of cash acquired	-6.3	-125.6	-1,300.10
Investment in unconsolidated entities	-0.1	-1.7	-2
Return of capital from unconsolidated entities	1	1.8	1
Proceeds from sale of property, plant and equipment	26.8	40.5	8.6
Proceeds from property, plant and equipment insurance settlement	15.4	10.2	0.5
Intercompany notes issued	0	0	0
Intercompany notes proceeds	0	0	0
Intercompany capital investment	'	0	0
Intercompany return of capital	0	0	0
Net cash provided by (used for) investing activities	-403.6	-544.2	-1,491.40
Proceeds from issuance of notes	0	1,442.20	0
Additions to revolving credit facilities	99	748.1	802.6
Repayments of revolving credit facilities	-146.2	-759.8	-564.5
Additions to debt	277	326.6	2,877.40
Repayments of debt	-787.4	-1,803.60	-1,966.30
Debt issuance costs	-2	-16.2	-43.8
Cash paid for debt extinguishment costs	-0.1	-14	-37.9
Issuances of common stock, net of related minimum tax withholdings	3.5	5.2	25.2
Excess tax benefits from share-based compensation	6	10	0
Advances from (repayments to) consolidated entities	0	0	0
Advances from (repayments to) unconsolidated entity	1.2	0.2	1.7
Cash dividends paid to shareholders	-75.3	-56.5	-37.6
Cash distributions paid to noncontrolling interests	-4.9	-0.8	-5.2
Intercompany notes borrowing	0	0	0
Intercompany notes payments	0	0	0
Intercompany capital receipt	'	0	0
Intercompany capital return	0	0	0
Intercompany dividends	0	0	0
Net cash (used for) provided by financing activities	-629.2	-118.6	1,051.60
Effect of exchange rate changes on cash and cash equivalents	-0.5	1.6	3.9
Cash and Cash Equivalents, Period Increase (Decrease)	-0.8	-4.5	25.8
Cash and cash equivalents at beginning of period	37.2	41.7	15.9
Cash and cash equivalents at end of period	36.4	37.2	41.7
Parent Company [Member]	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'
Net cash provided by (used for) operating activities	409	132.9	50.3
Capital expenditures	0	0	0
Cash paid for the purchase of a leased facility	'	0	'
Cash paid for purchase of business, net of cash acquired	0	-93.5	-1,300.10
Investment in unconsolidated entities	0	0	0
Return of capital from unconsolidated entities	0	0	0
Proceeds from sale of property, plant and equipment	0	0	0
Proceeds from property, plant and equipment insurance settlement	0	0	0
Intercompany notes issued	-468.8	-36.1	-16.7
Intercompany notes proceeds	732.8	27.6	174.4
Intercompany capital investment	'	-89.3	-1,171.70
Intercompany return of capital	0.8	378.9	102.3
Net cash provided by (used for) investing activities	264.8	187.6	-2,211.80
Proceeds from issuance of notes	'	1,442.20	'
Additions to revolving credit facilities	74.3	687.4	553.2
Repayments of revolving credit facilities	-86.9	-674.4	-562.5
Additions to debt	0	227.1	2,225
Repayments of debt	-355.6	-1,527.60	-626.6
Debt issuance costs	-1	-16.2	-43.8
Cash paid for debt extinguishment costs	-0.1	-14	-37.9
Issuances of common stock, net of related minimum tax withholdings	3.5	5.2	25.2
Excess tax benefits from share-based compensation	0	0	'
Advances from (repayments to) consolidated entities	-261.5	-470.6	657.9
Advances from (repayments to) unconsolidated entity	0	0	0
Cash dividends paid to shareholders	-75.3	-56.5	-37.6
Cash distributions paid to noncontrolling interests	0	0	0
Intercompany notes borrowing	43.6	76.9	17.5
Intercompany notes payments	0	0	-8.9
Intercompany capital receipt	'	0	0
Intercompany capital return	0	0	0
Intercompany dividends	0	0	0
Net cash (used for) provided by financing activities	-659	-320.5	2,161.50
Effect of exchange rate changes on cash and cash equivalents	0	0	0
Cash and Cash Equivalents, Period Increase (Decrease)	14.8	0	0
Cash and cash equivalents at beginning of period	0	0	0
Cash and cash equivalents at end of period	14.8	0	0
Guarantor Subsidiaries [Member]	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'
Net cash provided by (used for) operating activities	1,053.20	540	1,051.60
Capital expenditures	-419.4	-426.5	-172.2
Cash paid for the purchase of a leased facility	'	-17	'
Cash paid for purchase of business, net of cash acquired	-6.3	-32.1	0
Investment in unconsolidated entities	-0.1	-1.7	-2
Return of capital from unconsolidated entities	1	1.8	0.8
Proceeds from sale of property, plant and equipment	16	17.9	7.4
Proceeds from property, plant and equipment insurance settlement	15.4	10.2	0.5
Intercompany notes issued	-562.6	-156.2	-39.5
Intercompany notes proceeds	319.9	1.8	270
Intercompany capital investment	'	0	-207.1
Intercompany return of capital	0.4	0	2.1
Net cash provided by (used for) investing activities	-635.7	-601.8	-140
Proceeds from issuance of notes	'	0	'
Additions to revolving credit facilities	0	0	0
Repayments of revolving credit facilities	0	0	0
Additions to debt	0	0	0
Repayments of debt	0	-28.8	-1,169.10
Debt issuance costs	0	0	0
Cash paid for debt extinguishment costs	0	0	0
Issuances of common stock, net of related minimum tax withholdings	0	0	0
Excess tax benefits from share-based compensation	6	10	'
Advances from (repayments to) consolidated entities	185.4	505.9	-598.5
Advances from (repayments to) unconsolidated entity	1.2	0.2	1.7
Cash dividends paid to shareholders	0	0	0
Cash distributions paid to noncontrolling interests	0	0	0
Intercompany notes borrowing	467.8	35.6	0
Intercompany notes payments	-732.6	-10	-174.4
Intercompany capital receipt	'	39.3	1,136.70
Intercompany capital return	-0.8	-378.9	-102.3
Intercompany dividends	-343.3	-115.1	-2.7
Net cash (used for) provided by financing activities	-416.3	58.2	-908.6
Effect of exchange rate changes on cash and cash equivalents	0	0	0
Cash and Cash Equivalents, Period Increase (Decrease)	1.2	-3.6	3
Cash and cash equivalents at beginning of period	0	3.6	0.6
Cash and cash equivalents at end of period	1.2	0	3.6
Non-Guarantor Subsidiaries [Member]	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'
Net cash provided by (used for) operating activities	-43.4	151.4	-601.1
Capital expenditures	-21	-25.9	-27.2
Cash paid for the purchase of a leased facility	'	0	'
Cash paid for purchase of business, net of cash acquired	0	0	0
Investment in unconsolidated entities	0	0	0
Return of capital from unconsolidated entities	0	0	0.2
Proceeds from sale of property, plant and equipment	10.8	22.6	1.2
Proceeds from property, plant and equipment insurance settlement	0	0	0
Intercompany notes issued	0	0	0
Intercompany notes proceeds	0	0	8.9
Intercompany capital investment	'	0	0
Intercompany return of capital	0	0	0
Net cash provided by (used for) investing activities	-10.2	-3.3	-16.9
Proceeds from issuance of notes	'	0	'
Additions to revolving credit facilities	24.7	60.7	249.4
Repayments of revolving credit facilities	-59.3	-85.4	-2
Additions to debt	277	99.5	652.4
Repayments of debt	-431.8	-247.2	-170.6
Debt issuance costs	-1	0	0
Cash paid for debt extinguishment costs	0	0	0
Issuances of common stock, net of related minimum tax withholdings	0	0	0
Excess tax benefits from share-based compensation	0	0	'
Advances from (repayments to) consolidated entities	76.1	-35.3	-59.4
Advances from (repayments to) unconsolidated entity	0	0	0
Cash dividends paid to shareholders	0	0	0
Cash distributions paid to noncontrolling interests	-4.9	-0.8	-5.2
Intercompany notes borrowing	520	79.8	38.7
Intercompany notes payments	-320.1	-19.4	-270
Intercompany capital receipt	'	50	242.1
Intercompany capital return	-0.4	0	-2.1
Intercompany dividends	-43	-52.5	-36.4
Net cash (used for) provided by financing activities	37.3	-150.6	636.9
Effect of exchange rate changes on cash and cash equivalents	-0.5	1.6	3.9
Cash and Cash Equivalents, Period Increase (Decrease)	-16.8	-0.9	22.8
Cash and cash equivalents at beginning of period	37.2	38.1	15.3
Cash and cash equivalents at end of period	20.4	37.2	38.1
Consolidation, Eliminations [Member]	'	'	'
Condensed Financial Statements, Captions [Line Items]	'	'	'
Net cash provided by (used for) operating activities	-386.3	-167.6	-39.1
Capital expenditures	0	0	0
Cash paid for the purchase of a leased facility	'	0	'
Cash paid for purchase of business, net of cash acquired	0	0	0
Investment in unconsolidated entities	0	0	0
Return of capital from unconsolidated entities	0	0	0
Proceeds from sale of property, plant and equipment	0	0	0
Proceeds from property, plant and equipment insurance settlement	0	0	0
Intercompany notes issued	1,031.40	192.3	56.2
Intercompany notes proceeds	-1,052.70	-29.4	-453.3
Intercompany capital investment	'	89.3	1,378.80
Intercompany return of capital	-1.2	-378.9	-104.4
Net cash provided by (used for) investing activities	-22.5	-126.7	877.3
Proceeds from issuance of notes	'	0	'
Additions to revolving credit facilities	0	0	0
Repayments of revolving credit facilities	0	0	0
Additions to debt	0	0	0
Repayments of debt	0	0	0
Debt issuance costs	0	0	0
Cash paid for debt extinguishment costs	0	0	0
Issuances of common stock, net of related minimum tax withholdings	0	0	0
Excess tax benefits from share-based compensation	0	0	'
Advances from (repayments to) consolidated entities	0	0	0
Advances from (repayments to) unconsolidated entity	0	0	0
Cash dividends paid to shareholders	0	0	0
Cash distributions paid to noncontrolling interests	0	0	0
Intercompany notes borrowing	-1,031.40	-192.3	-56.2
Intercompany notes payments	1,052.70	29.4	453.3
Intercompany capital receipt	'	-89.3	-1,378.80
Intercompany capital return	1.2	378.9	104.4
Intercompany dividends	386.3	167.6	39.1
Net cash (used for) provided by financing activities	408.8	294.3	-838.2
Effect of exchange rate changes on cash and cash equivalents	0	0	0
Cash and Cash Equivalents, Period Increase (Decrease)	0	0	0
Cash and cash equivalents at beginning of period	0	0	0
Cash and cash equivalents at end of period	$0	$0	$0