Pension and Postretirement Benefit Plans - Net Periodic Benefit Cost (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Pension Plan [Member] | U.S. [Member] | Qualified [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	[1],[2],[3]	$ 0	$ 67	$ 0	$ 202
Interest cost	[2],[3]	149	157	450	478
Expected return on plan assets	[2],[3]	(259)	(248)	(783)	(759)
Amortization of:
Actuarial losses	[1],[2],[3]	30	91	90	302
Prior service costs/(credits)	[2],[3]	0	0	1	3
Curtailments	[2],[3]	1	1	11	10
Settlements	[2],[3]	38	30	84	54
Defined benefit plan, net periodic benefit cost	[2],[3]	(40)	99	(147)	292
Pension Plan [Member] | International [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	[1],[3]	33	44	104	127
Interest cost	[3]	52	52	160	152
Expected return on plan assets	[3]	(89)	(87)	(274)	(256)
Amortization of:
Actuarial losses	[1],[3]	25	29	77	86
Prior service costs/(credits)	[3]	(1)	(1)	(3)	(3)
Curtailments	[3]	(4)	(2)	(4)	(2)
Settlements	[3]	0	0	0	3
Defined benefit plan, net periodic benefit cost	[3]	17	35	61	106
Supplemental Employee Retirement Plan [Member] | U.S. [Member] | Non-Qualified [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	[1],[3]	0	6	0	18
Interest cost	[3]	14	13	40	41
Expected return on plan assets	[3]	0	0	0	0
Amortization of:
Actuarial losses	[1],[3]	3	12	10	37
Prior service costs/(credits)	[3]	0	0	(1)	(1)
Curtailments	[3]	1	0	1	0
Settlements	[3]	3	7	24	32
Defined benefit plan, net periodic benefit cost	[3]	20	39	75	127
Postretirement Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	[1],[3]	10	10	29	32
Interest cost	[3]	18	23	54	68
Expected return on plan assets	[3]	(9)	(9)	(28)	(27)
Amortization of:
Actuarial losses	[1],[3]	2	8	5	23
Prior service costs/(credits)	[3]	(45)	(45)	(135)	(137)
Curtailments	[3]	(1)	(3)	(15)	(15)
Settlements	[3]	0	0	0	0
Defined benefit plan, net periodic benefit cost	[3]	$ (26)	$ (17)	$ (89)	$ (57)

[1] Effective January 1, 2018, we froze two significant defined benefit pension plans to future benefit accruals in the U.S. and U.K. and as a result, service costs for those plans are eliminated. In addition, due to the plan freeze, the average amortization period for the U.S. qualified plans and U.S. supplemental (non-qualified) plans was extended to the expected life expectancy of the plan participants, whereas the average amortization period in prior years utilized the expected future service period of plan participants.

[2] In the second quarter of 2017, we settled the remaining obligation associated with the Hospira U.S. qualified defined benefit pension plan. We purchased a group annuity contract on behalf of the remaining plan participants with a third-party insurance provider. As a result, we were relieved of the $156 million net pension benefit obligation and recorded a pre-tax settlement gain of $41 million, partially offset by the recognition of actuarial losses and prior service costs upon plan settlement of approximately $30 million in Other (income)/deductions––net (see Note 3).

[3] We adopted a new accounting standard on January 1, 2018 that requires the net periodic pension and postretirement benefit costs other than service costs be presented in Other (income)/deductions––net on the condensed consolidated statements of income. For additional information, see Note 1B and Note 4.