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Restructuring Charges and Other Costs Associated with Acquisitions and Cost-Reduction/Productivity Initiatives - Restructuring Accruals (Detail) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Oct. 01, 2017 | Sep. 30, 2018 | Oct. 01, 2017
Restructuring Reserve [Roll Forward] |  |  |  |  |
Balance, December 31, 2017 | [1] |  |  | $ 1,105 |
Provision/(Credit) | [2] | $ 1 | $ 56 | (32) | $ 28
Utilization and other | [3] |  |  | (277) |
Balance, September 30, 2018 | [4] | 796 |  | 796 |
Employee Termination Costs [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Balance, December 31, 2017 | [1] |  |  | 1,039 |
Provision/(Credit) |  |  |  | (53) |
Utilization and other | [3] |  |  | (235) |
Balance, September 30, 2018 | [4] | 750 |  | 750 |
Asset Impairment Charges [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Balance, December 31, 2017 | [1] |  |  | 0 |
Provision/(Credit) |  |  |  | 8 |
Utilization and other | [3] |  |  | (8) |
Balance, September 30, 2018 | [4] | 0 |  | 0 |
Exit Costs [Member] |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |
Balance, December 31, 2017 | [1] |  |  | 66 |
Provision/(Credit) |  |  |  | 14 |
Utilization and other | [3] |  |  | (34) |
Balance, September 30, 2018 | [4] | $ 46 |  | $ 46 |
[1] | Included in Other current liabilities ($643 million) and Other noncurrent liabilities ($462 million).
[2] | 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).
[3] | Includes adjustments for foreign currency translation.
[4] | Included in Other current liabilities ($397 million) and Other noncurrent liabilities ($399 million).

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