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Acquisitions (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
12 Months Ended 0 Months Ended
Sep. 28, 2012
Sep. 30, 2011
Sep. 24, 2010
Sep. 24, 2010
ROW Installation & Services
Sep. 24, 2010
Electrical and Metal Products Segment
Sep. 28, 2012
Visonic Ltd.
Sep. 30, 2011
Signature Security Group
Sep. 30, 2011
Chemguard Inc.
May 14, 2010
Brink's Home Security Holdings, Inc., now operating as Broadview Security
May 14, 2010
Brink's Home Security Holdings, Inc., now operating as Broadview Security
All-cash election
May 14, 2010
Brink's Home Security Holdings, Inc., now operating as Broadview Security
All stock election
May 14, 2010
Brink's Home Security Holdings, Inc., now operating as Broadview Security
Mixed cash/stock election
Business Acquisition Disclosures                        
Acquisition of businesses, net of cash acquired $ 217 $ 353 $ 48 $ 9 $ 39 $ 94 $ 184 $ 130        
Acquisition of businesses by discontinued operations entity, net of cash acquired                 448      
Cash balance acquired in the acquisition of a business 17 3       5 2 1        
Cash balance acquired in the acquisition of a business by discontinued operations entity                 137      
Redeemable noncontrolling interest 12                       
Business acquisition cost of acquired entity purchase price                 2,000      
Cash consideration per common share outstanding (in dollars per share)                   $ 13.15   $ 12.75
Exchange ratio (as a percent)                   75.62% 109.51% 76.66%
Total Tyco common shares issued                 35      
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned                 1,362      
Acquisition and integration costs $ 9 $ 5