Business Segment Reporting (Schedule Of Information For Continuing Operations For Each Reportable Segment And Other Operations And Headquarters) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Revenue		$ 534	$ 494	$ 990	$ 913
Reportable Segment Adjusted EBITDA		120	106	184	189
Terminix [Member]
Segment Reporting Information [Line Items]
Revenue		517	495	955	914
Terminix [Member] | Operating segment
Segment Reporting Information [Line Items]
Revenue		517	495	955	914
Reportable Segment Adjusted EBITDA	[1]	120	$ 106	184	$ 189
European Pest Control And Other [Member]
Segment Reporting Information [Line Items]
Revenue		17		35
European Pest Control And Other [Member] | Operating segment
Segment Reporting Information [Line Items]
Revenue		$ 17		$ 35

[1] Presented below is a reconciliation of Net Income to Reportable Segment Adjusted EBITDA