Pension and Postretirement Benefit Plans (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended
	Jan. 31, 2015	Mar. 29, 2015
Defined Benefit Plan Disclosure [Line Items]
Prescription expense reimbursements received		$ 133
U.S. Qualified [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions from our general assets for the three months ended March 29, 2015	1,000	1,000	[1]
Expected contributions from our general assets during 2015		1,000	[2]
U.S. Supplemental (Non-Qualified) [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions from our general assets for the three months ended March 29, 2015		72	[1]
Expected contributions from our general assets during 2015		136	[2]
International [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions from our general assets for the three months ended March 29, 2015		58	[1]
Expected contributions from our general assets during 2015		240	[2]
Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions from our general assets for the three months ended March 29, 2015		(81)	[1]
Expected contributions from our general assets during 2015		$ 86	[2]

[1] Contributions to the postretirement plans were offset by reimbursements of approximately $133 million received for eligible 2014 prescription expenses for certain retirees.

[2] Contributions expected to be made for 2015 are inclusive of amounts contributed during the three months ended March 29, 2015, including the $1.0 billion voluntary contribution that was made in January 2015 for the U.S. Qualified plan. 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.