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Income Taxes Deferred Tax Assets, Balance Sheet Location (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Deferred Tax Asset, Balance Sheet Location [Line Items]
Deferred Tax Liabilities, Net	$ (90)	$ (37)
Long-term assets
Deferred Tax Asset, Balance Sheet Location [Line Items]
Deferred Tax Assets, Net	143	185
Long-term liabilities
Deferred Tax Asset, Balance Sheet Location [Line Items]
Deferred Tax Liabilities, Net	$ (233)	$ (222)

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- Definition

[Line Items] for Deferred Tax Asset, Balance Sheet Location [Table]

+ References

No definition available.

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- Definition

Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319

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Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=84176650&loc=d3e31931-109318

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-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
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