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Restructuring Charges and Other Costs Associated with Acquisitions and Cost-Reduction/Productivity Initiatives - Footnotes (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Oct. 01, 2017 | Sep. 30, 2018 | Oct. 01, 2017
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring charges (income) | [1] | $ 1 | $ 56 | $ (32) | $ 28
Corporate [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring charges (income) |  | 3 | 12 | (19) | 15
IH [Member] | Operating Segments [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring charges (income) |  | (13) | 1 | (25) | (1)
EH [Member] | Operating Segments [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring charges (income) |  | 7 | 1 | (5) | (11)
WRD & GPD [Member] | Segment Reconciling Items [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring charges (income) |  | 3 | 2 | 1 | (24)
Manufacturing operations [Member] | Segment Reconciling Items [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring charges (income) |  | 1 | 40 | 16 | 48
Pension Plan [Member] | U.S. [Member] | Qualified Plan [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Gain related to settlement of Hospira U.S. qualified defined benefit pension plan | [2],[3] | $ (38) | $ (30) | $ (84) | (54)
Pension Plan [Member] | U.S. [Member] | Hospira [Member] | Qualified Plan [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Gain related to settlement of Hospira U.S. qualified defined benefit pension plan |  |  |  |  | $ 12
[1] | In the third quarter of 2018, restructuring charges are primarily due to accruals for exit costs and asset write downs related to our acquisition of Hospira, partially offset by the reversal of previously recorded accruals for employee termination costs. In the first nine months of 2018, restructuring credits are mostly related to the reversal of previously recorded accruals for employee termination costs. In the three and nine months ended October 1, 2017, restructuring charges were mainly associated with our acquisitions of Hospira and Medivation, partially offset by credits associated with cost-reduction and productivity initiatives not associated with acquisitions that mostly related to the reversal of previously recorded accruals for employee termination costs. Employee terminations primarily include revisions of our estimates of severance benefits. Employee termination costs are generally recorded when the actions are probable and estimable and include accrued severance benefits, many of which may be paid out during periods after termination.The restructuring activities for 2018 are associated with the following:•For the third quarter of 2018, IH ($13 million credit); EH ($7 million charge); manufacturing operations ($1 million charge); WRD/GPD ($3 million charge); and Corporate ($3 million charge).•For the first nine months of 2018, IH ($25 million credit); EH ($5 million credit); WRD/GPD ($1 million charge); manufacturing operations ($16 million charge); and Corporate ($19 million credit).The restructuring activities for 2017 are associated with the following:•For the third quarter of 2017, IH ($1 million charge); EH ($1 million charge); WRD/GPD ($2 million charge); manufacturing operations ($40 million charge); and Corporate ($12 million charge).•For the first nine months of 2017, IH ($1 million credit); EH ($11 million credit); WRD/GPD ($24 million credit); manufacturing operations ($48 million charge); and Corporate ($15 million charge).
[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.

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