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Income Taxes (Net Operating Losses and Credits) (Details) $ in Millions	Dec. 31, 2018 USD ($)
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards, subject to expiration	$ 3
Net operating loss carryforwards, not subject to expiration	20
State and local jurisdiction
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards, subject to expiration	$ 4

X

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards that are not subject to expiration dates.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	instant

X

- Definition

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards that are subject to expiration dates.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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X

- Details

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X

- Details

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