Pension and Postretirement Benefit Plans - Net Periodic Benefit Cost (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 29, 2014		Jun. 30, 2013		Jun. 29, 2014		Jun. 30, 2013
U.S. Qualified [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 63	[1]	$ 75	[1]	$ 127	[1]	$ 152	[1]
Interest cost	175	[1]	167	[1]	350	[1]	335	[1]
Expected return on plan assets	(262)	[1]	(251)	[1]	(525)	[1]	(504)	[1]
Actuarial losses	15	[1]	89	[1]	31	[1]	179	[1]
Prior service credits	(1)	[1]	(1)	[1]	(3)	[1]	(3)	[1]
Curtailments	0	[1]	0	[1]	2	[1]	(1)	[1]
Settlements	12	[1]	33	[1]	21	[1]	63	[1]
Special termination benefits	0	[1]	0	[1]	0	[1]	0	[1]
Defined benefit plan, net periodic benefit cost	2	[1]	112	[1]	3	[1]	221	[1]
U.S. Supplemental (Non-Qualified) [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	5	[2]	6	[2]	10	[2]	13	[2]
Interest cost	14	[2]	13	[2]	29	[2]	27	[2]
Expected return on plan assets	0	[2]	0	[2]	0	[2]	0	[2]
Actuarial losses	8	[2]	14	[2]	15	[2]	27	[2]
Prior service credits	(1)	[2]	0	[2]	(1)	[2]	(1)	[2]
Curtailments	0	[2]	0	[2]	0	[2]	0	[2]
Settlements	5	[2]	6	[2]	16	[2]	28	[2]
Special termination benefits	0	[2]	0	[2]	0	[2]	0	[2]
Defined benefit plan, net periodic benefit cost	31	[2]	39	[2]	69	[2]	94	[2]
International [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	52	[3]	54	[3]	104	[3]	110	[3]
Interest cost	101	[3]	93	[3]	201	[3]	190	[3]
Expected return on plan assets	(116)	[3]	(100)	[3]	(230)	[3]	(204)	[3]
Actuarial losses	24	[3]	35	[3]	49	[3]	72	[3]
Prior service credits	(1)	[3]	(1)	[3]	(3)	[3]	(3)	[3]
Curtailments	16	[3]	(21)	[3]	15	[3]	(22)	[3]
Settlements	1	[3]	1	[3]	2	[3]	5	[3]
Special termination benefits	3	[3]	2	[3]	5	[3]	2	[3]
Defined benefit plan, net periodic benefit cost	80	[3]	63	[3]	143	[3]	150	[3]
Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	14		15		28		31
Interest cost	42		41		84		83
Expected return on plan assets	(15)		(13)		(31)		(27)
Actuarial losses	2		12		3		23
Prior service credits	(15)		(11)		(29)		(22)
Curtailments	(1)		(2)		(4)		(9)
Settlements	0		0		0		0
Special termination benefits	0		0		0		0
Defined benefit plan, net periodic benefit cost	$ 27		$ 42		$ 51		$ 79

[1] The decrease in net periodic benefit costs for the three and six months ended June 29, 2014, compared to the three and six months ended June 30, 2013, for our U.S. qualified pension plans was primarily driven by the decrease in the amounts amortized for actuarial losses resulting from the increase, in 2013, in the discount rate used to determine the benefit obligation (which reduced the amount of deferred actuarial losses), lower service cost resulting from cost-reduction initiatives, lower settlement activity and greater expected return on plan assets resulting from an increased plan asset base, partially offset by higher interest costs resulting from the increase, in 2013, in the discount rate used to determine the benefit obligation.

[2] The decrease in net periodic benefit costs for the three and six months ended June 29, 2014, compared to the three and six months ended June 30, 2013, for our U.S. supplemental (non-qualified) pension plans was primarily driven by lower settlement activity and the decrease in the amounts amortized for actuarial losses resulting from the increase, in 2013, in the discount rate used to determine the benefit obligation.

[3] The decrease in net periodic benefit costs for the six months ended June 29, 2014, compared to the six months ended June 30, 2013, for our international pension plans was primarily driven by the decrease in the amounts amortized for actuarial losses resulting from increases, in 2013, in the discount rates used to determine the benefit obligations, greater expected return on plan assets resulting from an increased plan asset base, partially offset by the change in the impact of curtailments associated with restructuring initiatives. The increase in net periodic benefit costs for the three months ended June 29, 2014 for our international pension plans was primarily driven by the decrease in the amounts amortized for actuarial losses resulting from increases, in 2013, in the discount rates used to determine the benefit obligations, greater expected return on plan assets resulting from an increased plan asset base, more than offset by the change in the impact of curtailments associated with restructuring initiatives.