Restructuring And Other Charges (Schedule Of Restructuring Charges) (Details) - USD ($)		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges		$ 2,000,000	$ 2,000,000	$ 14,000,000	$ 10,000,000
Professional Fees		0	2,000,000	0	2,000,000
Stock-based compensation expense		3,000,000	3,000,000	13,000,000	10,000,000
Terminix [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	[1]	2,000,000	1,000,000	6,000,000	4,000,000
Impairment charges		1,000,000		3,000,000
Severance and other restructuring costs		1,000,000	1,000,000	3,000,000	4,000,000
Unpaid and accrued costs		2,000,000		2,000,000
Corporate [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	[2]	1,000,000	$ 1,000,000	8,000,000	5,000,000
Unpaid and accrued costs		2,000,000		2,000,000
Global Service Center Relocation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	[3]				1,000,000
Lease termination costs					1,000,000
Severance And Other Costs [Member] | Corporate [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges				3,000,000	1,000,000
Other Costs [Member] | Corporate [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges	[4]	$ 1,000,000		$ 5,000,000	$ 4,000,000

[1] For the three and nine months ended September 30, 2020, these charges included $1 million and $3 million of severance and other costs and $1 million and $3 million of impairment and other charges related to our call center right of use assets, which we exited during the second quarter. Severance and other costs of $2 million were unpaid and accrued as of September 30, 2020. For the three and nine months ended September 30, 2019, these charges included $1 million and $4 million, respectively, of severance and other costs.

[2] We have historically made changes on an ongoing basis to enhance capabilities and reduce costs in our corporate functions that provide company-wide administrative services to support operations. Of the restructuring charges incurred by European Pest Control and Other, $2 million was unpaid and accrued as of September 30, 2020. For the three and nine months ended September 30, 2020 and 2019, these charges were comprised of the following

[3] For the nine months ended September 30, 2019, these charges included lease termination and other charges of $1 million related to our headquarter relocation.

[4] Represents costs incurred in connection with our CEO transition, charges associated with the marketing of our corporate aircraft for sale and accelerated depreciation on systems we are replacing with the implementation of our new customer experience platform.