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Restructuring - Summary of Severance Charges and Associated Spending (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Oct. 01, 2017 | Jul. 02, 2017 | Apr. 02, 2017 | Jan. 01, 2017 | Oct. 02, 2016 | Jul. 03, 2016 | Apr. 03, 2016 | Dec. 31, 2017 | Jan. 01, 2017 | Jan. 03, 2016
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Restructuring charges |  |  |  |  |  |  |  |  | $ 309 | $ 491 | $ 509
Medical Devices |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Reserve balance beginning |  |  |  | $ 381 |  |  |  | $ 501 | 381 | 501 | 590
Activity during the period |  |  |  |  |  |  |  |  |  | (120) | (89)
Restructuring charges | $ 284 | $ 187 | $ 128 | 161 | $ 298 | $ 109 | $ 141 | 137 | 850 | 685 | 590
Cash payments |  |  |  |  |  |  |  |  | (680) |  |
Settled non cash |  |  |  |  |  |  |  |  | (194) |  |
Reserve balance ending | 267 |  |  |  | 381 |  |  |  | 267 | 381 | 501
Restructuring Reserve, Accrual Adjustment |  |  |  |  |  |  |  |  | (90) |  |
Medical Devices | Severance |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Reserve balance beginning |  |  |  | 380 |  |  |  | 484 | 380 | 484 | 484
Activity during the period |  |  |  |  |  |  |  |  |  | (104) |
Reserve balance ending | 229 |  |  |  | 380 |  |  |  | 229 | 380 | 484
Medical Devices | Asset Write-offs |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Reserve balance beginning |  |  |  | 0 |  |  |  | 0 | 0 | 0 | 86
Activity during the period |  |  |  |  |  |  |  |  |  | 0 | (86)
Restructuring charges |  |  |  |  |  |  |  |  | 194 |  |
Settled non cash |  |  |  |  |  |  |  |  | (194) |  |
Reserve balance ending | 0 |  |  |  | 0 |  |  |  | 0 | 0 | 0
Medical Devices | Other |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Reserve balance beginning |  |  |  | $ 1 |  |  |  | $ 17 | 1 | 17 | 20
Activity during the period |  |  |  |  |  |  |  |  |  | (16) | (3)
Restructuring charges |  |  |  |  |  |  |  |  | 656 |  |
Reserve balance ending | $ 38 |  |  |  | $ 1 |  |  |  | 38 | $ 1 | $ 17
Medical Devices | Severance |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Cash payments |  |  |  |  |  |  |  |  | (61) |  |
Restructuring Reserve, Accrual Adjustment |  |  |  |  |  |  |  |  | (90) |  |
Medical Devices | Other |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Cash payments |  |  |  |  |  |  |  |  | $ (619) |  |

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- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3536-108585 + Details
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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 + Details
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- Definition Amount of expense (reversal of expense) which increases (decreases) the restructuring reserve from an adjustment to a previously accrued restructuring liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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- Definition Amount of increase (decrease) in the accrual for restructuring costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)) -URI http://asc.fasb.org/extlink&oid=27011515&loc=d3e140904-122747 + Details
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