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Restructuring and Other Charges - Activity and Reserve Balances for Restructuring Charges (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring reserve beginning balance |  |  | $ 13 |
Cash payments |  |  | (24) |
Restructuring charges |  |  | 144 |
Other |  |  | (77) |
Restructuring reserve ending balance | $ 56 |  | 56 |
Restructuring charges | 105 | $ 472 | 144 | $ 516
Gain on sale of assets | (2) | (5) | (4) | (7)
Layoff costs |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring reserve beginning balance |  |  | 13 |
Cash payments |  |  | (24) |
Restructuring charges |  |  | 131 |
Other |  |  | (64) |
Restructuring reserve ending balance | 56 |  | 56 |
Restructuring charges | 54 | $ 15 | 76 | $ 68
Other exit costs |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring reserve beginning balance |  |  | 0 |
Cash payments |  |  | 0 |
Restructuring charges |  |  | 13 |
Other |  |  | (13) |
Restructuring reserve ending balance | 0 |  | 0 |
Restructuring charges | $ 2 |  | 5 |
Other Exit Costs, United Kingdom Pension Settlement Accounting |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring charges |  |  | 64 |
Other Exit Costs, Impairments Of Assets |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring charges |  |  | 6 |
Other Exit Costs, Post Closing Adjustment |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring charges |  |  | 6 |
Other Exit Costs, Other |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring charges |  |  | 3 |
Sale of Assets |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Gain on sale of assets |  |  | $ 2 |

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- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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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/disclosureRef -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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 17 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3367-108585 + 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://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -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=115931487&loc=d3e140904-122747 + 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://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -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=115931487&loc=d3e140904-122747 + Details
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