Proceeds From Spin-Off Entity Common Shares Retained, Net

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Use Of Cash To Retire Short-Term Credit Facility

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Amount of minimum lease payments for capital leases due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of minimum lease payments for capital leases due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

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Face (par) amount of debt instrument at time of issuance.

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Net increase or decrease in the carrying amount of the debt instrument for the period.

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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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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

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Face (par) amount of the original debt instrument that was repurchased.

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Gross amount of debt extinguished.

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No definition available.

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Amount of realized and unrealized gain (loss) on investment.

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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 carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

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Principal amount of long-term debt and capital lease obligation maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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No definition available.

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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Long-Term Debt (Revolving Credit Facility, Extinguishment of Debt And Repurchase of Notes Narrative) (Details) - USD ($) shares in Millions										1 Months Ended		12 Months Ended
	Dec. 12, 2019	Nov. 05, 2019	Mar. 27, 2019	Mar. 12, 2019	Oct. 01, 2018	Aug. 01, 2018	Sep. 18, 2017	May 11, 2017	Nov. 08, 2016	Apr. 30, 2019	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Sep. 05, 2019	Aug. 16, 2018
Debt Instrument [Line Items]
Extinguishment of Debt, Amount			$ 600,000,000	$ 468,000,000
Loss on extinguishment of debt		$ (1,000,000)										$ 8,000,000	$ 10,000,000	$ 6,000,000
Amount borrowed												1,470,000,000	1,000,000,000
Gain (Loss) on Investments			40,000,000									40,000,000	(249,000,000)
Proceeds From Spin-Off Entity Common Shares Retained, Net			486,000,000
Use Of Cash To Retire Short-Term Credit Facility			$ 114,000,000
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Five												762,000,000
Capital Leases, Future Minimum Payments Due Thereafter													1,000,000
Capital Leases, Future Minimum Payments Due, Next Twelve Months													$ 31,000,000
Short-term Credit Facility [Member]
Debt Instrument [Line Items]
Loss on extinguishment of debt												4,000,000
Face amount of debt instrument				$ 600,000,000
Revolving Credit Facility Maturing In 2021 [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount		120,000,000
Revolving Credit Facility Maturing In 2021 [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowings									$ 300,000,000
Debt Instrument, Maturity Date									Nov. 08, 2021
Revolving Credit Facility Maturing In 2021 [Member] \| Letter of Credit [Member]
Debt Instrument [Line Items]
Maximum borrowings									$ 225,000,000
Borrowings outstanding															$ 120,000,000
Revolving Credit Facility Maturing In 2024 [Member]
Debt Instrument [Line Items]
Maximum borrowings		400,000,000
Available borrowing capacity												370,000,000
Revolving Credit Facility Maturing In 2024 [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowings	$ 400,000,000
Debt Instrument, Maturity Date	Nov. 05, 2024
Revolving Credit Facility Maturing In 2024 [Member] \| Letter of Credit [Member]
Debt Instrument [Line Items]
Maximum borrowings	$ 125,000,000
Borrowings outstanding												$ 23,000,000
Senior Secured Term Loan Facility Maturing In 2023 [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount		$ 171,000,000
7.25% Notes Maturing In 2038 [Member]
Debt Instrument [Line Items]
Interest rate (as a percent)												7.25%
7.45% Notes Maturing In 2027 [Member]
Debt Instrument [Line Items]
Interest rate (as a percent)										7.45%		7.45%
Extinguishment of Debt, Amount										$ 1,000,000
Redemption percentage										105.50%
Spin-off [Member]
Debt Instrument [Line Items]
Reduction of long term debt					$ 1,000,000
Spin-off [Member] \| Short-term Credit Facility [Member]
Debt Instrument [Line Items]
Amount borrowed						$ 1,000,000,000
Spin-off [Member] \| Frontdoor Term Loan Facility [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Face amount of debt instrument																$ 650,000,000
Spin-off [Member] \| Revolving Credit Facility Maturing In 2023 [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowings																$ 250,000,000
Secured Debt [Member] \| Spin-off [Member] \| Senior Secured Term Loan Facility Maturing In 2023 [Member]
Debt Instrument [Line Items]
Repayment of principal amount						$ 982,000,000
Loss on extinguishment of debt												$ 10,000,000
Loans Payable [Member] \| 7.25% Notes Maturing In 2038 [Member]
Debt Instrument [Line Items]
Interest rate (as a percent)							7.25%	7.25%			7.25%
Extinguishment of Debt, Amount											$ 3,000,000
Repayment of principal amount							$ 13,000,000	$ 17,000,000
Loss on extinguishment of debt														$ 6,000,000
Redemption percentage							104.625%	97.00%			99.50%
Loans Payable [Member] \| 7.45% Notes Maturing In 2027 [Member]
Debt Instrument [Line Items]
Interest rate (as a percent)											7.45%
Extinguishment of Debt, Amount											$ 7,000,000
Redemption percentage											105.50%
Loans Payable [Member] \| Notes 7.45%, And 7.25% Collectively [Member]
Debt Instrument [Line Items]
Loss on extinguishment of debt												$ 2,000,000
Loans Payable [Member] \| Spin-off [Member] \| Frontdoor Notes [Member]
Debt Instrument [Line Items]
Interest rate (as a percent)																6.75%
Face amount of debt instrument																$ 350,000,000
Frontdoor, inc. [Member]
Debt Instrument [Line Items]
Debt Conversion, Converted Instrument, Shares Issued			16.7