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Income Taxes (Components of Income (Loss) before Income Tax) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
United States	$ 2	$ 44	$ 84
Foreign	266	352	163
Total	268	396	247
United Kingdom
Operating Loss Carryforwards [Line Items]
Foreign	105	203	40
Australia
Operating Loss Carryforwards [Line Items]
Foreign	15	7	(30)
Canada
Operating Loss Carryforwards [Line Items]
Foreign	3	(2)	15
Middle East
Operating Loss Carryforwards [Line Items]
Foreign	87	61	42
Africa
Operating Loss Carryforwards [Line Items]
Foreign	5	13	20
Other
Operating Loss Carryforwards [Line Items]
Foreign	$ 51	$ 70	$ 76

X

- Definition

The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(h)(1)(i))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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- Definition

The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
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-Paragraph 1
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- Definition

Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 235
-SubTopic 10
-Section S99
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