Fair Value (Details) - USD ($) $ in Millions	Jul. 02, 2017		Dec. 31, 2016
Financial assets (liabilities)
Short- and long-term debt principal	$ (4,011)		$ (3,924)
Fair Value
Financial assets (liabilities)
Available-for-sale securities	171	[1]	177
Cash flow hedges	(343)	[1]	(477)
Short- and long-term debt principal	(3,975)	[1]	(3,849)
Carrying Value
Financial assets (liabilities)
Available-for-sale securities	171	[1]	177
Cash flow hedges	(343)	[1]	(477)
Short- and long-term debt principal	(4,011)	[1]	(3,924)
Fair Value, Inputs, Level 1
Financial assets (liabilities)
Available-for-sale securities	55	[1]	59
Cash flow hedges	0	[1]	0
Short- and long-term debt principal	0	[1]	0
Fair Value, Inputs, Level 2
Financial assets (liabilities)
Available-for-sale securities	116	[1],[2]	118
Cash flow hedges	(343)	[1],[2]	(477)
Short- and long-term debt principal	(3,975)	[1],[2]	(3,849)
Fair Value, Inputs, Level 3
Financial assets (liabilities)
Available-for-sale securities	0		0
Cash flow hedges	0		0
Short- and long-term debt principal	$ 0		$ 0

[1] We had no Level 3 financial instruments on July 2, 2017, or December 31, 2016.

[2] Determined under a market approach using valuation models that incorporate observable inputs such as interest rates, bond yields and quoted prices for similar assets and liabilities.