Amount after tax of gain (loss) not previously recognized resulting from the disposal of a discontinued operation.

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Name:	us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Business Disposition (Details) - USD ($) $ in Millions		3 Months Ended	9 Months Ended
Business Disposition (Details) - USD ($) $ in Millions	Jul. 02, 2018	Sep. 29, 2018	Sep. 29, 2018
Business Disposition
Net proceeds from business disposition			$ 807
Disposition of businesses \| Tools and Test Equipment
Business Disposition
Net proceeds from business disposition	$ 807
After tax gain		$ 410