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Short And Long-Term Debt Loss on the Early Extinguishment of Debt (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Debt Instrument [Line Items]
Gain (Loss) on Extinguishment of Debt	[1]	$ (8)	$ 0	$ (8)	$ (5)
Long-term Debt, Gross		4,078		4,078
Repayments of Unsecured Debt				(550)	$ (450)
7.625% Senior Secured Second Lien Notes | Secured Debt
Debt Instrument [Line Items]
Long-term Debt, Gross		$ 550		$ 550		$ 0
Interest Rate		7.625%		7.625%
5.25% Senior Notes | Senior Notes
Debt Instrument [Line Items]
Long-term Debt, Gross		$ 0		$ 0		$ 550
Interest Rate		5.25%		5.25%
[1] Loss on the early extinguishment of debt is recorded in Corporate and Other.

X

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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The cash outflow to repay long-term debt that is not secured by collateral. Excludes repayments of tax exempt unsecured debt.

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