Pension and Postretirement Benefit Plans - Employer Contributions (Detail) $ in Millions	1 Months Ended		9 Months Ended
	Sep. 27, 2020 USD ($)		Sep. 27, 2020 USD ($)
Pension Plan [Member] | U.S. [Member] | Qualified [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions from our general assets for the nine months ended September 27, 2020	$ 1,250		$ 1,253
Expected contributions from our general assets during 2020	1,253	[1]	1,253	[1]
Pension Plan [Member] | International [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions from our general assets for the nine months ended September 27, 2020			151
Expected contributions from our general assets during 2020	186	[1]	186	[1]
Supplemental Employee Retirement Plan [Member] | U.S. [Member] | Non-Qualified [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions from our general assets for the nine months ended September 27, 2020			169
Expected contributions from our general assets during 2020	188	[1]	188	[1]
Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions from our general assets for the nine months ended September 27, 2020			84
Expected contributions from our general assets during 2020	$ 122	[1]	$ 122	[1]

[1] Contributions expected to be made for 2020 are inclusive of amounts contributed during the nine months ended September 27, 2020. The U.S. supplemental (non-qualified) pension plan, international pension plan and the postretirement plan contributions from our general assets include direct employer benefit payments. For the U.S. qualified plans, we made a $1.25 billion voluntary contribution in September 2020.