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Short And Long-Term Debt Loss on the Early Extinguishment of Debt (Details) - USD ($)	3 Months Ended					9 Months Ended
	Sep. 30, 2020		Sep. 30, 2019		Mar. 31, 2019	Sep. 30, 2020		Sep. 30, 2019		Dec. 31, 2019
Debt Instrument [Line Items]
Gain (Loss) on Extinguishment of Debt	$ 0	[1]	$ 10,000,000	[1]	$ (5,000,000)	$ (8,000,000)	[1]	$ 5,000,000	[1]
Long-term Debt, Gross	3,391,000,000					3,391,000,000
Repayments of Unsecured Debt						(550,000,000)		(533,000,000)
Debt Instrument, Repurchase Amount			$ 93,000,000					$ 93,000,000
7.625% Senior Secured Second Lien Notes | Secured Debt
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 550,000,000					$ 550,000,000				$ 0
Interest Rate	7.625%					7.625%
5.25% Senior Notes | Senior Notes
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 0					$ 0				$ 550,000,000
Interest Rate	5.25%					5.25%
[1] Former parent legacy items and (Gain) loss on the early extinguishment of debt are 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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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.

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Fair value amount of debt instrument that was repurchased.

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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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