Summary of Major Components of Merger and Restructuring Expenses, Net (Detail) - USD ($) $ in Millions	3 Months Ended
Mar. 30, 2019	Mar. 31, 2018
Merger and transaction related expenses, net
Severance and retention	$ 1	$ 2
Transaction and integration	7	7
Facility closure, contract termination, and other expenses, net		3
Total Merger and transaction related expenses, net	8	12
Restructuring expenses
Facility closure, contract termination, professional fees and other expenses, net	6	5
Total Restructuring expenses	6	5
Total Merger and restructuring expenses, net	$ 14	$ 17

Amount of other expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses associated with a discontinued operation or an asset retirement obligation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 420
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-Section 50
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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