Amount of income tax expense (benefit) on continuing operations.

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Amount of income tax expense (benefit) on discontinued operations.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign income tax expense (benefit).

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Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement.

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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Sep. 30, 2017	Oct. 01, 2016	Sep. 30, 2017	Oct. 01, 2016
Income Taxes
Effective income tax rate (as a percent)	21.70%		23.60%
Discrete tax benefit	$ 15
Income tax benefit (expense)	$ (44)	$ 192	$ (127)	$ 46
Effective tax rate, favorable impact from research and development		9
Effective tax rate, favorable impact from foreign tax rate differentials		7
Internal Revenue Service (IRS) \| Approval of 1998 To 2008 tax years final settlement \| Continuing Operations
Income Taxes
Income tax benefit on continuing operations		206		206
Internal Revenue Service (IRS) \| Approval of 1998 To 2008 tax years final settlement \| Discontinued Operations
Income Taxes
Income tax benefit on discontinued operations		$ 113		$ 113