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Income Taxes - Schedule of Effective Income Tax Rate Reconciliation, Income Tax expense (Benefit) (Parenthetical) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Effective income tax rate reconciliation, executive compensation amount	$ 1	$ 1

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Effective income tax rate reconciliation, nondeductible expense, executive compensation amount.

+ References

No definition available.

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- References

No definition available.

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