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Income Taxes (Tax Loss and Credit Carryforwards Expirations) (Details) $ in Millions	Dec. 31, 2018 USD ($)
Income Tax Disclosure [Abstract]
2019	$ 21
2020	27
2021	26
2022	116
2023	12
Thereafter	213
Unlimited	$ 116

X

- Definition

Tax loss and credit carryforwards, expire in after year five

+ References

No definition available.

+ Details

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- Definition

Tax loss and credit carryforwards, expire in year five

+ References

No definition available.

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- Definition

Tax loss and credit carryforwards, expire in year four

+ References

No definition available.

+ Details

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- Definition

Tax loss and credit carryforwards, expire in year one

+ References

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+ Details

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- Definition

Tax loss and credit carryforwards, expire in year three

+ References

No definition available.

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- Definition

Tax loss and credit carryforwards, expire in year two

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- Definition

Tax loss and credit carryforwards, expire, unlimited

+ References

No definition available.

+ Details

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