Long-Term Debt (Schedule Of Long-Term Debt) (Details) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2018	Dec. 31, 2017	Sep. 18, 2017
Long-term debt [Line Items]
Less current portion		$ (54)	$ (144)
Total long-term debt		2,702	2,643
Vehicle Capital Leases [Member]
Long-term debt [Line Items]
Vehicle capital leases	[1]	$ 90	90
Borrowing margin (as a percent)		2.45%
Variable rate basis		one-month LIBOR
Senior Secured Term Loan Facility Maturing In 2023 [Member] | Secured Debt [Member]
Long-term debt [Line Items]
Long-term debt	[2]	$ 637	1,615
Unamortized debt issuance costs		5	16
Unamortized original issue discount		1	3
5.125% Notes Maturing In 2024 [Member] | Loans Payable [Member]
Long-term debt [Line Items]
Long-term debt	[3]	$ 740	739
Interest rate (as a percent)		5.125%
Unamortized debt issuance costs		$ 10	11
7.10% Notes Maturing In 2018 [Member] | Loans Payable [Member]
Long-term debt [Line Items]
Long-term debt	[4]		79
Interest rate (as a percent)		7.10%
Repayment of long-term debt		$ 79
7.45% Notes Maturing In 2027 [Member] | Loans Payable [Member]
Long-term debt [Line Items]
Long-term debt	[5]	$ 171	169
Interest rate (as a percent)		7.45%
7.25% Notes Maturing In 2038 [Member]
Long-term debt [Line Items]
Interest rate (as a percent)				7.25%
7.25% Notes Maturing In 2038 [Member] | Loans Payable [Member]
Long-term debt [Line Items]
Long-term debt	[5]	$ 42	42
Interest rate (as a percent)		7.25%
Frontdoor Term Loan Facility [Member] | Secured Debt [Member]
Long-term debt [Line Items]
Long-term debt	[6]	$ 640
Unamortized debt issuance costs		8
Unamortized original issue discount		2
Frontdoor Notes [Member] | Loans Payable [Member]
Long-term debt [Line Items]
Long-term debt	[7]	344
Unamortized debt issuance costs		6
Notes 7.45%, And 7.25% Collectively [Member] | Loans Payable [Member]
Long-term debt [Line Items]
Unamortized fair value adjustments related to purchase accounting		34	36
Other [Member]
Long-term debt [Line Items]
Long-term debt	[8]	91	54
Copesan Services, Inc. (“Copesan”) [Member] | Other [Member]
Long-term debt [Line Items]
Long-term debt		$ 77	$ 77

[1] The Company has entered into a fleet management services agreement (the "Fleet Agreement") which, among other things, allows the Company to obtain fleet vehicles through a leasing program. All leases under the Fleet Agreement are capital leases for accounting purposes. The lease rental payments include an interest component calculated using a variable rate based on one-month LIBOR plus other contractual adjustments and a borrowing margin totaling 2.45 percent.

[2] As of September 30, 2018 and December 31, 2017, presented net of $5 million and $16 million, respectively, in unamortized debt issuance costs and $1 million and $3 million, respectively, in unamortized original issue discount paid.

[3] As of September 30, 2018 and December 31, 2017, presented net of $10 million and $11 million, respectively, in unamortized debt issuance costs.

[4] On March 1, 2018, the Company paid $79 million upon their maturity.

[5] As of September 30, 2018 and December 31, 2017, collectively presented net of $34 million and $36 million, respectively, of unamortized fair value adjustments related to purchase accounting, which increases the effective interest rate from the coupon rates shown above.

[6] As of September 30, 2018, presented net of $8 million in unamortized debt issuance costs and $2 million in unamortized original issue discount paid.

[7] As of September 30, 2018, presented net of $6 million in unamortized debt issuance costs.

[8] As of September 30, 2018, includes approximately $77 million of future payments in connection with the Company's acquisitions of Copesan and other companies as further described in Note 13.