Fair Value Measurements (Fair Value Of Assets And Liabilities) (Details) - USD ($) $ in Millions	Apr. 02, 2016	Dec. 31, 2015
Assets:
Available-for-sale securities:	$ 61	$ 457
Recurring basis \| Level 1 \| Government, agency, and government-sponsored enterprise obligations
Assets:
Available-for-sale securities:	0	0
Recurring basis \| Level 1 \| Corporate bonds
Assets:
Available-for-sale securities:	0	0
Recurring basis \| Level 1 \| Common stock
Assets:
Available-for-sale securities:	2	6
Recurring basis \| Level 2 \| Government, agency, and government-sponsored enterprise obligations
Assets:
Available-for-sale securities:	52	444
Recurring basis \| Level 2 \| Corporate bonds
Assets:
Available-for-sale securities:	7	7
Recurring basis \| Level 2 \| Common stock
Assets:
Available-for-sale securities:	0	0
Recurring basis \| Foreign exchange contracts \| Level 1
Assets:
Foreign exchange derivative contracts	0	0
Liabilities:
Foreign exchange derivative contracts	0	0
Recurring basis \| Foreign exchange contracts \| Level 2
Assets:
Foreign exchange derivative contracts	3	6
Liabilities:
Foreign exchange derivative contracts	5	2
Recurring basis \| Interest rate swap \| Level 1
Liabilities:
Interest rate swap	0	0
Recurring basis \| Interest rate swap \| Level 2
Liabilities:
Interest rate swap	1	1
Recurring basis \| Estimate of Fair Value, Fair Value Disclosure \| Government, agency, and government-sponsored enterprise obligations
Assets:
Available-for-sale securities:	52	444
Recurring basis \| Estimate of Fair Value, Fair Value Disclosure \| Corporate bonds
Assets:
Available-for-sale securities:	7	7
Recurring basis \| Estimate of Fair Value, Fair Value Disclosure \| Common stock
Assets:
Available-for-sale securities:	2	6
Recurring basis \| Estimate of Fair Value, Fair Value Disclosure \| Foreign exchange contracts
Assets:
Foreign exchange derivative contracts	3	6
Liabilities:
Foreign exchange derivative contracts	5	2
Recurring basis \| Estimate of Fair Value, Fair Value Disclosure \| Interest rate swap
Liabilities:
Interest rate swap	$ 1	$ 1

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Fair Value Liabilities Measured On Recurring Basis [Abstract]

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities.

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