| **Pension and Postretirement Benefit Plans**          | 6 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                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| **Compensation and Retirement Disclosure [Abstract]** |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        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| Pension and Postretirement Benefit Plans              | Pension and Postretirement Benefit PlansThe following table provides the components of net periodic benefit cost:  Three Months Ended  Pension Plans    U.S.Qualified(a) U.S.Supplemental(Non-Qualified)(b) International(c) PostretirementPlans(d)(MILLIONS OF DOLLARS) July 3, 2016 June 28, 2015 July 3, 2016 June 28, 2015 July 3, 2016 June 28, 2015 July 3, 2016 June 28, 2015Net periodic benefit cost/(credit):                Service cost(e) $62 $72 $5 $6 $43 $46 $10 $14Interest cost(e) 134 168 11 13 60 76 22 32Expected return on plan assets (240) (270) — — (98) (103) (8) (13)Amortization of:                Actuarial losses 99 82 9 11 24 31 7 9Prior service costs (credits) 1 (2) — — (1) (2) (41) (31)Curtailments 1 — — — (1) — (1) (7)Settlements 16 19 6 2 — 1 — —  $73 $69 $31 $32 $27 $50 $(11) $5                   Six Months Ended  Pension Plans    U.S.Qualified(a) U.S.Supplemental(Non-Qualified)(b) International(c) PostretirementPlans(d)(MILLIONS OF DOLLARS) July 3, 2016 June 28, 2015 July 3, 2016 June 28, 2015 July 3, 2016 June 28, 2015 July 3, 2016 June 28, 2015Net periodic benefit cost/(credit):                Service cost(e) $125 $144 $9 $11 $85 $94 $20 $27Interest cost(e) 268 337 23 27 119 155 44 64Expected return on plan assets (481) (542) — — (196) (209) (17) (26)Amortization of:                Actuarial losses 199 165 18 23 46 63 15 18Prior service costs (credits) 2 (3) (1) (1) (1) (3) (82) (62)Curtailments 3 1 — — (1) — (6) (17)Settlements 31 45 16 17 1 1 — —  $146 $147 $66 $77 $53 $101 $(27) $6(a) The increase in net periodic benefit costs for the three months ended July 3, 2016, compared to the three months ended June 28, 2015, is due primarily to (i) a lower expected return on plan assets resulting from a lower expected rate of return as well as a net decrease of approximately $1.1 billion in the asset base due in part to lump-sum payments made in 2015 to certain terminated vested colleagues to settle Pfizer’s pension obligation, partially offset by a voluntary contribution of $1.0 billion made at the beginning of January 2016, and (ii) an increase in the amounts amortized for actuarial losses as a result of the addition of Hospira qualified plans. The aforementioned increases were partially offset by (i) lower service and interest costs, resulting from a change in our approach for measuring service and interest costs (see (e) below) and (ii) lower settlement activity. The slight decrease in net periodic benefit costs for the six months ended July 3, 2016, compared to the six months ended June 28, 2015, for our U.S. qualified pension plans was primarily driven by (i) lower service and interest costs, resulting from a change in our approach for measuring service and interest costs (see (e) below) and (ii) lower settlement activity. The aforementioned decreases were largely offset by (i) a lower expected return on plan assets resulting from a lower expected rate of return as well as a net decrease of approximately $1.1 billion in the asset base due in part to lump-sum payments made in 2015 to certain terminated vested colleagues to settle Pfizer’s pension obligation, partially offset by a voluntary contribution of $1.0 billion made at the beginning of January 2016, and (ii) an increase in the amounts amortized for actuarial losses as a result of the addition of Hospira qualified plans.(b) The decrease in net periodic benefit costs for the three and six months ended July 3, 2016, compared to the three and six months ended June 28, 2015, for our U.S. non-qualified pension plans was primarily driven by (i) a decrease in the amounts amortized for actuarial losses resulting from the increase, in 2015, in the discount rate used to determine the benefit obligation and (ii) lower service and interest costs resulting from a change in our approach for measuring service and interest costs (see (e) below). For the three months ended July 3, 2016, compared to the three months ended June 28, 2015, the aforementioned decreases were largely offset by an increase in settlement activity due to timing of settlement payments made; for the six months ended July 3, 2016, compared to the six months ended June 28, 2015, settlement activity was consistent with the prior year. (c) The decrease in net periodic benefit costs for the three and six months ended July 3, 2016, compared to the three and six months ended June 28, 2015, for our international pension plans was primarily driven by (i) lower service and interest costs, resulting from favorable foreign exchange rate changes and a change in our approach for measuring service and interest costs (see (e) below), and (ii) a decrease in the amounts amortized for actuarial losses resulting from large gains in 2015, which decreased the plan net loss position, partially offset by a decrease in the expected return on plan assets due to a lower expected rate of return on plan assets, and favorable foreign exchange rates changes.(d) The change from net periodic benefit costs to net periodic benefit credits for the three and six months ended July 3, 2016, compared to the three and six months ended June 28, 2015, for our postretirement plans was primarily driven by (i) lower service and interest costs, resulting from a change in our approach for measuring service and interest costs (see (e) below) and (ii) an increase in prior service credits due to the postretirement medical plan cap changes during 2015. The aforementioned changes were partially offset by (i) a decrease in expected return on plan assets, primarily resulting from a decrease in plan assets reflecting payments by the plan for IRC 401(h) reimbursements to Pfizer for eligible 2014 and 2015 prescription drug expenses for certain retirees, and (ii) lower curtailment gains.(e) Effective January 1, 2016, the Company changed the approach used to measure service and interest costs for U.S. and certain international pension and other postretirement benefits. For fiscal 2015, the Company measured service and interest costs utilizing a single weighted-average discount rate derived from the bond model or yield curve used to measure the respective plan obligations. For fiscal 2016, we elected to measure service and interest costs by applying the spot rates along the yield curve for certain international plans, or a yield curve implied from our specific detailed bond model for U.S. plans, to the plans' liability cash flows. The Company believes the new approach provides a more precise measurement of service and interest costs by aligning the timing of the plans’ liability cash flows to the corresponding spot rates on the yield curve.This change does not affect the measurement of our plan obligations. We have accounted for this change as a change in accounting estimate and, accordingly, have accounted for it on a prospective basis. The expected reduction in expense for 2016 associated with this change in estimate is $191 million, including $42 million from international plans, which is expected to be recognized evenly over each quarter of the year.As of and for the six months ended July 3, 2016, we contributed and expect to contribute from our general assets as follows:   Pension Plans  (MILLIONS OF DOLLARS) U.S. Qualified U.S. Supplemental (Non-Qualified) International Postretirement PlansContributions from/(reimbursements of) our general assets for the six months ended July 3, 2016(a) $1,000 $100 $95 $(100)Expected contributions from our general assets during 2016(b) $1,000 $149 $181 $(4)(a) Contributions to the postretirement plans reflect IRC 401(h) reimbursements totaling $198 million received for eligible 2014 and 2015 prescription drug expenses for certain retirees.(b) Contributions expected to be made for 2016 are inclusive of amounts contributed during the six months ended July 3, 2016, including the $1.0 billion voluntary contribution that was made in January 2016 for the U.S. qualified plans, which was considered pre-funding for future anticipated mandatory contributions and is also expected to reduce Pension Benefit Guaranty Corporation variable rate premiums. 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. |

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| - Definition
The entire disclosure for pension and other postretirement benefits.
+ References
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