Revenues (Disaggregation Of Revenue) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 456	$ 419
Residential Pest Control [Member]
Disaggregation of Revenue [Line Items]
Revenues	159	154
Commercial Pest Control [Member]
Disaggregation of Revenue [Line Items]
Revenues	107	94
Termite and Home Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	148	146
Sales of Products and Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	18	16
Fumigation [Member]
Disaggregation of Revenue [Line Items]
Revenues	7	10
European Pest Control [Member]
Disaggregation of Revenue [Line Items]
Revenues	18
Terminix
Disaggregation of Revenue [Line Items]
Revenues	438	419
Terminix | Residential Pest Control [Member]
Disaggregation of Revenue [Line Items]
Revenues	159	154
Terminix | Commercial Pest Control [Member]
Disaggregation of Revenue [Line Items]
Revenues	107	94
Terminix | Termite and Home Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	148	146
Terminix | Sales of Products and Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	18	16
Terminix | Fumigation [Member]
Disaggregation of Revenue [Line Items]
Revenues	7	$ 10
European Pest Control And Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	18
European Pest Control And Other [Member] | European Pest Control [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 18