Pension and Postretirement Benefit Plans (Detail) - USD ($) $ in Millions		1 Months Ended	6 Months Ended
		Jan. 31, 2015	Jun. 28, 2015
Defined Benefit Plan Disclosure [Line Items]
Prescription expense reimbursements received			$ 133
U.S. Qualified [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions from/reimbursements of our general assets for the six months ended June 30, 2015		$ 1,000	1,000	[1]
Expected contributions from our general assets during 2015	[2]		1,000
U.S. Supplemental (Non-Qualified) [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions from/reimbursements of our general assets for the six months ended June 30, 2015	[1]		84
Expected contributions from our general assets during 2015	[2]		117
International [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions from/reimbursements of our general assets for the six months ended June 30, 2015	[1]		117
Expected contributions from our general assets during 2015	[2]		237
Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions from/reimbursements of our general assets for the six months ended June 30, 2015	[1]		(30)
Expected contributions from our general assets during 2015	[2]		$ 81

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

[2] Contributions expected to be made for 2015 are inclusive of amounts contributed during the six months ended June 28, 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.