Income Taxes Changes in Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at the beginning of the period	$ 408	$ 389	$ 353
Increases for tax positions of prior years	9	2	59
Decreases for tax positions of prior years	(81)	(35)	(18)
Increases based on tax positions related to the current year	74	135	62
Decreases due to settlements with taxing authorities	(3)	(59)	(62)
Decreases due to lapse of statute of limitations	(10)	(24)	(5)
Reclassified to liabilities held for sale	(10)	0	0
Balance at the end of the period	$ 387	$ 408	$ 389

Unrecognized Tax Benefits, Reduction Resulting from Liabilities Reclassified to Liabilities Held for Sale

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 10B
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-Section 50
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- Definition

Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
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- Definition

Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

+ References

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Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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- Definition

Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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