Annual report pursuant to Section 13 and 15(d)

Retirement Benefit Plans (Detail)

v3.20.4
Retirement Benefit Plans (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 26, 2020
Dec. 28, 2019
Dec. 29, 2018
Defined Benefit Plan Disclosure [Line Items]      
Beginning projected benefit obligation $ 4,929 $ 4,284 $ 3,433
Service cost 49 54  
Interest cost 97 113  
Actuarial (gain) loss 373 829  
Currency exchange rate changes 261 (2)  
Plan settlements (79) (57)  
Other changes in projected benefit obligation (56) (86)  
Fair value of plan assets 2,878 2,654 $ 2,551
Actual return on plan assets 203 193  
Currency exchange rate changes 113 3  
Other (92) (93)  
Net unfunded status 2,051 1,630  
Accumulated other comprehensive loss (income), before tax3 $ 1,911 1,730  
Defined Benefit Plan, Additional Information [Abstract]      
Net Actuarial (Gain) Loss Amortization Percent 10.00%    
Accumulated benefit obligations $ 4,429 $ 3,862  
Defined Benefit Plan, Funded Status Percentage [Abstract]      
Defined Benefit Plan, Funded Percentage 61.00%    
Defined Benefit Plan, Component Of Worldwide Pension And Postretirement Benefit Obligation (percent) 31.00%    
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]      
Discount rate 1.90% 2.30%  
Rate of compensation increase 3.20% 3.50%  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Discount rate 2.30% 3.40% 3.00%
Expected long-term rate of return on plan assets 3.30% 4.70% 4.70%
Rate of compensation increase 3.20% 3.50% 3.30%
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]      
Estimated Benefit Payments, 2019 $ 158    
Estimated Benefit Payments, 2020 151    
Estimated Benefit Payments, 2021 155    
Estimated Benefit Payments, 2022 149    
Estimated Benefit Payments, 2023 154    
Estimated Benefit Payments, 2024-2028 814    
Other long-term liabilities [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Net unfunded status 2,051 $ 1,630  
Pension Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 455 397  
UNITED STATES      
Defined Benefit Plan Disclosure [Line Items]      
Projected Benefit Obligations Percentage Split 35.00%    
Fair Value of Plan Assets Percentage Split 55.00%    
AOCI Percentage Split 35.00%    
Defined Contribution Plan, Employer Discretionary Contribution Amount $ 398 379 $ 372
Defined Benefit Plan, Funded Status Percentage [Abstract]      
Defined Benefit Plan, Funded Percentage 89.00%    
UNITED STATES | Pension Plan [Member]      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) $ 164 135 $ 197
UNITED STATES | Postretirement Health Coverage [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Beginning projected benefit obligation 741 633  
Fair value of plan assets $ 600 $ 553  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]      
Discount rate 2.40% 3.30%  
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]      
Estimated Benefit Payments, 2019 $ 37    
Estimated Benefit Payments, 2020 38    
Estimated Benefit Payments, 2021 39    
Estimated Benefit Payments, 2022 40    
Estimated Benefit Payments, 2023 41    
Estimated Benefit Payments, 2024-2028 $ 218    
Foreign Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Projected Benefit Obligations Percentage Split 65.00%    
Fair Value of Plan Assets Percentage Split 45.00%    
AOCI Percentage Split 65.00%    
Marketable equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 320 $ 278  
Defined Benefit Plan, Target Plan Asset Allocations (percent) 35.00%    
Marketable equity securities | UNITED STATES      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Target Plan Asset Allocations (percent) 10.00%    
Financial institution instruments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 135 119  
Defined Benefit Plan, Target Plan Asset Allocations (percent) 45.00%    
Financial institution instruments | UNITED STATES      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Target Plan Asset Allocations (percent) 90.00%    
Assets measured at net asset value [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 2,401 2,236  
Cash [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 22 $ 21  
Hedge Funds [Member] | Foreign Plan [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Target Plan Asset Allocations (percent) 20.00%    
Level 1 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 0    
Level 1 [Member] | Marketable equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0    
Level 1 [Member] | Financial institution instruments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0    
Level 2 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 434    
Level 2 [Member] | Marketable equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 320    
Level 2 [Member] | Financial institution instruments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 114    
Level 3 [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 21    
Level 3 [Member] | Marketable equity securities      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets 0    
Level 3 [Member] | Financial institution instruments      
Defined Benefit Plan Disclosure [Line Items]      
Fair value of plan assets $ 21