Restructuring And Other Charges (Schedule Of Reconciliation Of The Beginning And Ending Balances Of Accrued Restructuring Charges) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Restructuring Cost and Reserve [Line Items]
Balance at the beginning of the period		$ 9	$ 2
Costs incurred		19	6
Costs paid or otherwise settled		(19)	(4)
Balance at the end of the period		9	5
Severance [Member]
Restructuring Cost and Reserve [Line Items]
Balance at the beginning of the period		2	2
Costs incurred	[1]		4
Costs paid or otherwise settled		(2)	(1)
Balance at the end of the period			4
Accrued Merger Related Charges [Member]
Restructuring Cost and Reserve [Line Items]
Balance at the beginning of the period		7
Costs incurred		9
Costs paid or otherwise settled		(8)
Balance at the end of the period		8
Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Costs incurred	[2]	9	3
Costs paid or otherwise settled		$ (9)	(3)
Balance at the end of the period			$ 1

[1] Includes severance and related charges to align functions after the sale of the ServiceMaster Brands Divestiture Group, enhance field operations and corporate capabilities, and reduce costs in our corporate functions that provide administrative services to support operations.

[2] Primarily owned building and operating lease right-of-use asset impairment charges, costs to simplify our back-office and align as a singularly focused pest management company and other exit costs. Charges for the three months ended March 31, 2022, include a $9 million impairment of the Memphis headquarters building operating lease right-of-use asset and leasehold improvements. The impairment was the result of the recent sublease of approximately 24% of the building.