Gross Amount and Related Tax Benefit/(Expense) Recorded in and Associated with each Component of Other Comprehensive Income/(Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
Foreign currency translation adjustments
OCI Before Reclassifications
Before Tax Amount	$ 324	$ 239	$ (1,173)
Tax	0	0	0
Net of Tax Amount	324	239	(1,173)
Net investment hedge adjustments
OCI Before Reclassifications
Before Tax Amount	(426)	(2)	377
Tax	105	3	(93)
Net of Tax Amount	(321)	1	284
Amounts Excluded from Effectiveness Assessment
Before Tax Amount	28	29	10
Tax	(2)	(7)	(3)
Net of Tax Amount	26	22	7
Reclassifications
Before Tax Amount	(23)	(23)	(10)
Tax	6	7	3
Net of Tax Amount	(17)	(16)	(7)
Net cash flow hedge adjustments
OCI Before Reclassifications
Before Tax Amount	209	(16)	116
Tax	(65)	6	(17)
Net of Tax Amount	144	(10)	99
Amounts Excluded from Effectiveness Assessment
Before Tax Amount	24	30	2
Tax	0	(1)	0
Net of Tax Amount	24	29	2
Reclassifications
Before Tax Amount	(175)	(48)	(45)
Tax	59	7	1
Net of Tax Amount	(116)	(41)	(44)
Accumulated defined benefit plans adjustment, net gain (loss)
OCI Before Reclassifications
Before Tax Amount	(30)	(65)	74
Tax	3	(5)	(16)
Net of Tax Amount	(27)	(70)	58
Accumulated defined benefit plans adjustment, net prior service
OCI Before Reclassifications
Before Tax Amount	0	1	6
Tax	0	0	(3)
Net of Tax Amount	0	1	3
Net postemployment benefit plans adjustment, reclassified to net income/(loss)
Reclassifications
Before Tax Amount	(158)	(312)	(156)
Tax	40	78	38
Net of Tax Amount	$ (118)	$ (234)	$ (118)