Income Taxes (Income Taxes) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 25, 2021	Dec. 26, 2020	Dec. 28, 2019
Income Tax Contingency [Line Items]
Tax Adjustments, Settlements, and Unusual Provisions	$ 112
Impact of Swiss Tax Reform	0	$ 72	$ 24
Transition tax, payments made	309	78	663
Tax expense/(benefit) related to the TCJ Act	190	0	(8)
Income before income taxes in U.S	3,740	4,070	4,123
Income before income taxes in Foreign	6,081	4,999	5,189
Income before income taxes	9,821	9,069	9,312
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current: U.S. Federal	702	715	652
Current: Foreign	955	932	807
Current: State	44	110	196
Provision for income taxes, Current total	1,701	1,757	1,655
Deferred: U.S. Federal	375	273	325
Deferred: Foreign	(14)	(167)	(31)
Deferred: State	80	31	10
Provision for income taxes, Deferred total	441	137	304
Provision for income taxes	$ 2,142	$ 1,894	$ 1,959
U.S. Federal statutory tax rate
U.S. Federal statutory tax rate	21.00%	21.00%	21.00%
State income tax, net of U.S. Federal tax benefit	1.00%	1.20%	1.60%
Lower taxes on foreign results	(1.60%)	(0.80%)	(0.90%)
Provisional One Time Mandatory Repatriation TCJ Act, Percent	1.90%	0.00%	(0.10%)
Other, net	(0.50%)	(0.50%)	(0.60%)
Annual tax rate	21.80%	20.90%	21.00%
Deferred tax liabilities
Debt guarantee of wholly-owned subsidiary	$ 578	$ 578
Property, plant and equipment	2,036	1,851
Deferred tax liability, recapture of NOL	504	504
Deferred Tax Liabilities, Deferred Expense	216	0
Deferred Tax - Lease liability	450	371
Other	254	159
Gross deferred tax liabilities	4,038	3,463
Deferred tax assets
Net carryforwards	4,974	5,008
Deferred Tax Assets, Goodwill and Intangible Assets	1,111	1,146
Share-based compensation	98	90
Retiree medical benefits	147	153
Other employee-related benefits	379	373
Pension benefits	0	80
Deductible state tax and interest benefits	149	150
Deferred Tax - Right of Use Asset	450	371
Other	842	866
Gross deferred tax assets	8,150	8,237
Valuation allowances	(4,628)	(4,686)	$ (3,599)
Deferred tax assets, net	3,522	3,551
Valuation Allowance [Abstract]
Balance, beginning of year	(4,686)	(3,599)	(3,753)
Provision	(9)	1,082	(124)
Other (deductions)/additions	(49)	5	(30)
Balance, end of year	$ (4,628)	(4,686)	$ (3,599)
Net tax (benefit)/expense related to the TCJ Act per share	$ 0.14		$ (0.01)
Deferred Tax Liabilities, Net	$ 516
Deferred Tax Assets, Net		(88)
Unrecognized Tax Benefits	1,900	1,621	$ 1,395
Additions for tax positions related to the current year	222	128
Additions for tax positions from prior years	681	153
Reductions for tax positions from prior years	(558)	(22)
Settlement payments	(25)	(13)
Statutes of limitations expiration	(39)	(23)
Translation and other	$ (2)	$ 3