Discontinued Operations (Narrative) (Details) $ in Millions			1 Months Ended	12 Months Ended
	Oct. 01, 2018	Sep. 14, 2018	Mar. 31, 2019	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Details of assets and liabilities and operating results of discontinued operations
Sublease Income				$ 2	$ 1
Frontdoor, inc. [Member]
Details of assets and liabilities and operating results of discontinued operations
Pro rata dividend to the Company's stockholders, percent of outstanding shares of common stock	80.20%
Percentage of outstanding common share exchanged			19.80%
Number of shares of Parent common stock exchanged for shares of Spinoff Company		2
Selling and administrative expenses				2	1
Accounts Payable Paid On Behalf Of Spin-Off Entity					2
Rental income				7	1
Sublease Income				$ 7	1
American Home Shield [Member]
Details of assets and liabilities and operating results of discontinued operations
Goodwill and indefinite lived intangible asset impairment					$ 0	$ 0