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Divestitures (Details) (USD $)	3 Months Ended		12 Months Ended
Divestitures (Details) (USD $)	Dec. 26, 2014	Dec. 27, 2013	Sep. 26, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax gain on sale of discontinued operations	$ 1,000,000	$ 0
Tyco Fire & Security Services Korea Co. Ltd.
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Businesses			1,930,000,000
Pre-tax gain on sale of discontinued operations			1,000,000,000
Discontinued Operation, Tax Effect of Income (Loss) from Disposal of Discontinued Operation			$ 212,000,000