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Accumulated Comprehensive Loss (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Income Tax Effects Allocated Directly to Equity, Cumulative Effect of Change in Accounting Principle |  | $ (5) |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, Tax | $ 1 | 3 | $ 5 |
Accumulated comprehensive loss, net of tax, beginning of period | (153) | (146) | (122) |
Other comprehensive income loss net of tax including redeemable non controlling interest | (7) | (8) | 15 |
Accumulated comprehensive loss, net of tax, end of period | (153) | (146) | (122) |
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Accumulated comprehensive loss, net of tax, beginning of period | (89) | (93) | (84) | $ (93)
Foreing currency translation adjustments | 0 | 3 | 2 |
Amortization of amounts included in net periodic benefit cost | (4) | (6) | (6) |
Other comprehensive income loss net of tax including redeemable non controlling interest | 4 | 9 | 9 |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | 0 | (17) | 0 |
Accumulated comprehensive loss, net of tax, end of period | (89) | (93) | (84) | (93)
Accumulated Foreign Currency Adjustment Attributable to Parent [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Accumulated comprehensive loss, net of tax, beginning of period | (67) | (57) | (40) | (46)
Foreing currency translation adjustments | (10) | (17) | 7 |
Accumulated comprehensive loss, net of tax, end of period | (67) | (57) | (40) | (46)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Accumulated comprehensive loss, net of tax, beginning of period | 3 | 4 | 2 | 2
Foreing currency translation adjustments | 0 | 0 | 0 |
Reclassification from OCI, Other | (1) | 1 | 0 |
Other comprehensive income loss net of tax including redeemable non controlling interest | (1) | 1 | 0 |
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | 0 | 1 | 0 |
Accumulated comprehensive loss, net of tax, end of period | $ 3 | $ 4 | $ 2 | $ 2

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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://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=118930883&loc=d3e637-108580 Reference 2: 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=118930883&loc=SL7669686-108580 Reference 3: 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=118930883&loc=d3e681-108580 + Details
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