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Income Taxes (Summary of Valuation Allowance) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Valuation Allowance [Line Items]
Net Gross Deferred Asset (Liability)	$ 360
Valuation Allowance	(204)	$ (220)
Deferred tax assets, net	156	$ 271
United States
Valuation Allowance [Line Items]
Net Gross Deferred Asset (Liability)	362
Valuation Allowance	(166)
Deferred tax assets, net	196
United Kingdom
Valuation Allowance [Line Items]
Net Gross Deferred Asset (Liability)	(61)
Valuation Allowance	0
Deferred tax liabilities, net	(61)
Australia
Valuation Allowance [Line Items]
Net Gross Deferred Asset (Liability)	11
Valuation Allowance	0
Deferred tax assets, net	11
Canada
Valuation Allowance [Line Items]
Net Gross Deferred Asset (Liability)	22
Valuation Allowance	(21)
Deferred tax assets, net	1
Other
Valuation Allowance [Line Items]
Net Gross Deferred Asset (Liability)	26
Valuation Allowance	(17)
Deferred tax assets, net	$ 9

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Gross Assets net of Gross Liabilities before valuation allowance

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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

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