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Business Restructuring (Tables) | 9 Months Ended
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Sep. 30, 2021
Restructuring and Related Activities [Abstract] |
Restructuring and Related Costs | The following table summarizes the reserve activity for the nine months ended September 30, 2021 and 2020:
| Total Reserve
($ in millions) | 2021 |  | 2020
January 1 | $293 |  |  | $224 |
Approved restructuring actions | 2 |  |  | 198 |
Release of prior reserves and other adjustments (a) | (23) |  |  | (26) |
Cash payments | (60) |  |  | (98) |
Foreign currency impact | (14) |  |  | 10 |
September 30 | $198 |  |  | $308 |
(a)Releases of $23 million and $26 million were recorded in the nine months ended September 30, 2021 and 2020, respectively, to reflect the current estimate of the costs to complete these actions.

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- Definition Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140864-122747 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 3: 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) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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