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Other Required Disclosures - Schedule of Other Assets (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Dec. 30, 2012
Sep. 30, 2012
Prepaid And Other Current Assets [Line Items]    
Prepaid expenses and other current assets $ 181.2 $ 53.1
Debt issuance costs 95.7 50.9
Deferred charges and other assets 70.3 68.6
Total other assets $ 347.2 $ 172.6