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Fair Value (Details) - USD ($) $ in Millions	Jul. 01, 2018	Dec. 31, 2017
Fair Value
Financial assets (liabilities)
Cash and equivalents	$ 8	$ 20
Available-for-sale debt securities	127
Available-for-sale debt securities		117
Equity securities	52
Equity securities		54
Other investments	4
Other investments		4
Cash flow hedges	(151)	(105)
Short- and long-term debt principal	(14,194)	(3,974)
Carrying Value
Financial assets (liabilities)
Cash and equivalents	8	20
Available-for-sale debt securities	127
Available-for-sale debt securities		117
Equity securities	52
Equity securities		54
Other investments	4
Other investments		4
Cash flow hedges	(151)	(105)
Short- and long-term debt principal	(14,400)	(4,032)
Fair Value, Inputs, Level 1
Financial assets (liabilities)
Cash and equivalents	2	15
Available-for-sale debt securities	0
Available-for-sale debt securities		0
Equity securities	52
Equity securities		54
Other investments	0
Other investments		0
Cash flow hedges	0	0
Short- and long-term debt principal	0	0
Fair Value, Inputs, Level 2
Financial assets (liabilities)
Cash and equivalents	6	5
Available-for-sale debt securities	127
Available-for-sale debt securities		117
Equity securities	0
Equity securities		0
Other investments	0
Other investments		0
Cash flow hedges	(151)	(105)
Short- and long-term debt principal	(14,194)	(3,974)
Fair Value, Inputs, Level 3
Financial assets (liabilities)
Cash and equivalents	0	0
Available-for-sale debt securities	0
Available-for-sale debt securities		0
Equity securities	0
Equity securities		0
Other investments	4
Other investments		4
Cash flow hedges	0	0
Short- and long-term debt principal	$ 0	$ 0

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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 portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Fair value of the assets less the liabilities of a derivative or group of derivatives.

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Amount of investments classified as other.

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