Income Taxes (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Income Tax Contingency [Line Items]
Deferred Tax Assets, Goodwill and Intangible Assets	$ 985	$ 0
International Audit	$ 364
International Audit, per share	$ 0.26
Federal Audit Settlement	$ 353
Federal Audit Settlement, Net of tax, Per share amount	$ 0.24
Federal Statutory Tax Rate, Pre TCJ Act	35.00%
Federal Statutory Tax Rate, Post TCJ Act	0.00%
Net tax (benefit)/expense related to the TCJ Act	$ (28)	$ 2,451	$ 0
Net tax (benefit)/expense related to the TCJ Act per share		$ 1.70
Total gross amount of reserves for income taxes	1,400
Interest accrued	179	$ 283
Interest accrued recognized	(64)	$ 89
Operating loss carryforwards	24,900
Income tax undistributed international earnings	24,000
Mandatory OneTime Repatriation TCJ ACT	4,000
Remeasurement of Deferred Taxes TCJ Act	1,500
Additional Transition Tax	$ 28
Additional Transition tax per share	$ 0.02
Foreign Earnings Repatriated	$ 20,400
Effective Income Tax Rate Reconciliation, Percent	(36.70%)	48.90%	25.40%
undistributed earnings of foreign subsidiaries, post distribution	$ 24,000
Transition tax liability	3,800
Transition tax, expected payments	400
International reorganization DTA	$ 4,300
international Reorganization DTA, per share	$ 3.05
International Reorganization Other DTA	$ 4,400
International Reorganization Other DTA, amortization period	15 years
Expire in 2016
Income Tax Contingency [Line Items]
Operating loss carryforwards	$ 200
Expire Between 2017 and 2035 Years
Income Tax Contingency [Line Items]
Operating loss carryforwards	20,500
Carried Forward Indefinitely
Income Tax Contingency [Line Items]
Operating loss carryforwards	$ 4,200