Basis of Presentation and Summary of Significant Accounting Policies (Details)			9 Months Ended
	Jan. 24, 2016 USD ($) $ / shares	May 30, 2014	Jun. 24, 2016 USD ($) segment	Mar. 10, 2016 USD ($)	Jan. 23, 2016	Sep. 25, 2015 USD ($)	Aug. 07, 2015 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of segments | segment			3
Business Acquisition [Line Items]
Amount to be received by JCI shareholders			$ 166,000,000
Revolving credit agreement, maximum borrowing capacity			1,500,000,000.0	$ 1,000,000,000
Ordinary shares, exchange ratio		1
Assets reclassified as held-for-sale			71,000,000			$ 208,000,000
Liabilities reclassified as held-for-sale			34,000,000			$ 80,000,000
Disposal Group, Held-for-sale, Not Discontinued Operations
Business Acquisition [Line Items]
Assets reclassified as held-for-sale			71,000,000
Liabilities reclassified as held-for-sale			$ 34,000,000
Johnson Controls, Inc.
Business Acquisition [Line Items]
Amount of shares each Tyco share will be consolidated into upon effect of JCI merger	1				0.955
Cash per share each JCI share will be converted to upon effect of the merger (in dollars per share) | $ / shares	$ 34.88
Amount to be received by JCI shareholders	$ 3,864,000,000
Proportion of shares required to be held (as a percent)	66.67%
Votes required (as a percent)	75.00%
Revolving credit agreement, maximum borrowing capacity				1,000,000,000			$ 1,500,000,000.0
Johnson Controls, Inc. | Unsecured Debt
Business Acquisition [Line Items]
Bank facility				$ 4,000,000,000