Business Segment Reporting (Schedule Of Reconciliation Of Net Income (Loss) To Reportable Segment Adjusted EBITDA) (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Reconciliation of Reportable Segment Adjusted EBITDA to Net Income (Loss)
Net Income	$ 53	$ 14	$ 59	$ 70	$ 67	$ 129
Depreciation and amortization expense	27		22		55	45
Acquisition-related costs			3		1	4
Fumigation related matters			(1)
Non-cash stock-based compensation expense	5		4		10	8
Restructuring and other charges	8		2		12	8
Realized (gain) on investment in frontdoor, inc.						(40)
Net earnings from discontinued operations	(13)		(17)		(26)	(34)
Provision for income taxes	18		14		16	17
Loss on extinguishment of debt						6
Interest expense	22		18		45	45
Reportable Segment Adjusted EBITDA	120		106		184	189
Corporate And Other Operations [Member]
Reconciliation of Reportable Segment Adjusted EBITDA to Net Income (Loss)
Net Income			(1)		1	(4)
ServiceMaster Brands [Member]
Reconciliation of Reportable Segment Adjusted EBITDA to Net Income (Loss)
Costs	3		$ 3		6	$ 6
European Pest Control [Member]
Reconciliation of Reportable Segment Adjusted EBITDA to Net Income (Loss)
Costs	$ (2)				$ (3)