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Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |
Beginning Balance | $ (413) |  |
Foreign currency translation adjustment | 20 | $ (23) | $ 28
Amortization of prior service credit cost | (3) | (3) | (4)
Amortization of prior service cost and net actuarial loss on post-retirement benefit plans into other non-operating income (expense), net | 11 | (19) | (3)
Unrealized loss on derivative hedge agreements | (10) |  |
Tax on unrealized gain on derivative hedge agreements | 1 |  |
Ending Balance | (371) | (413) |
Accumulated Other Comprehensive Income (Loss) |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |
Beginning Balance | (413) | (375) | (336)
Foreign currency translation adjustment | 20 | (22) | 27
Income tax impact on foreign currency translation adjustment | (35) | (39) | (9)
Amortization of prior service credit cost | 51 | (73) | (83)
Settlement charge released into other non-operating income (expense), net |  |  | 9
Amortization of prior service cost and net actuarial loss on post-retirement benefit plans into other non-operating income (expense), net | 11 | (19) | (3)
Income tax expense on changes in post-retirement benefit plans | (15) | 18 | 16
Research and development expenses | (5) | (3) | (2)
Unrealized loss on derivative hedge agreements |  | 9 |
Unrealized gain (loss) |  |  | (14)
Ending Balance | (371) | (413) | (375)
Foreign Currency Translation |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |
Beginning Balance | (86) | (103) | (121)
Foreign currency translation adjustment | 20 | (22) | 27
Income tax impact on foreign currency translation adjustment | (35) | (39) | (9)
Ending Balance | (101) | (86) | (103)
Postretirement Benefit Plans |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |
Beginning Balance | (330) | (269) | (214)
Amortization of prior service credit cost | 51 | (73) | (83)
Settlement charge released into other non-operating income (expense), net |  |  | 9
Amortization of prior service cost and net actuarial loss on post-retirement benefit plans into other non-operating income (expense), net | 11 | (19) | (3)
Income tax expense on changes in post-retirement benefit plans | (15) | 18 | 16
Research and development expenses | (5) | (3) | (2)
Ending Balance | (268) | (330) | (269)
Derivative Instruments |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |
Beginning Balance | 3 | (3) | (1)
Unrealized loss on derivative hedge agreements | (10) | 9 |
Unrealized gain (loss) |  |  | (14)
Tax on unrealized gain on derivative hedge agreements | 1 |  |
Ending Balance | (2) | 3 | (3)
Nonoperating Income (Expense) | Accumulated Other Comprehensive Income (Loss) |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |
Research and development expenses | 20 | 16 | 8
Nonoperating Income (Expense) | Postretirement Benefit Plans |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |
Research and development expenses | 20 | 16 | 8
Revenue | Accumulated Other Comprehensive Income (Loss) |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |
Reclassification of unrealized gain on foreign exchange agreements into revenue | (4) | 4 | (7)
Revenue | Derivative Instruments |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |
Reclassification of unrealized gain on foreign exchange agreements into revenue | $ (4) | 4 | (7)
Cost of Revenue | Accumulated Other Comprehensive Income (Loss) |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |
Reclassification of unrealized gain on foreign exchange agreements into revenue |  | (1) | (5)
Cost of Revenue | Derivative Instruments |  |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |  |
Reclassification of unrealized gain on foreign exchange agreements into revenue |  | $ (1) | $ (5)

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- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)(a)(4)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=124509347&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(23)(a)(3)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=124509347&loc=SL7669686-108580 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 65 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 65 -Paragraph 2 -Subparagraph (g)(2)(ii) -URI http://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=124509347&loc=d3e681-108580 + Details
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