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Other assets impairments, restructuring and other items - Summary of Restructuring Accruals (Detail) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2021 | Jun. 30, 2020
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning balance |  | $ (122) | $ (215)
Provision |  | (69) | (73)
Utilization and other | [1] | 64 | 150
Ending balance |  | (127) | (137)
Employee termination costs [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning balance |  | (115) | (208)
Provision |  | (61) | (36)
Utilization and other | [1] | 56 | 114
Ending balance |  | (120) | (130)
Other [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Beginning balance |  | (7) | (7)
Provision |  | (8) | (36)
Utilization and other | [1] | 8 | 36
Ending balance |  | $ (7) | $ (7)
[1] | Includes adjustments for foreign currency translation.

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- Definition Restructuring Accrual Provision + References No definition available. + Details
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- Definition Utilization and other. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + 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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- Details
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- Details
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