Pension and Postretirement Benefit Plans - Narrative (Detail) $ in Millions	3 Months Ended
	Apr. 04, 2021 USD ($)
Pension Plan [Member] | U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions by employer	$ 83
Pension Plan [Member] | International [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions by employer	40
Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions by employer	$ 19