Goodwill And Intangible Assets (Schedule Of Goodwill Balances For Continuing Operations By Reportable Segment And For Other Operations And Headquarters) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($)
Goodwill balances by segment for continuing operations
Balance at the beginning of the period	$ 2,096
Acquisitions	11
Impact of foreign exchange rates	(12)
Balance at the end of the period	2,095
Terminix
Goodwill balances by segment for continuing operations
Balance at the beginning of the period	1,946
Acquisitions	11
Impact of foreign exchange rates	(2)
Balance at the end of the period	1,955
European Pest Control And Other [Member]
Goodwill balances by segment for continuing operations
Balance at the beginning of the period	150	[1]
Acquisitions	0	[1]
Impact of foreign exchange rates	(10)	[1]
Balance at the end of the period	$ 140	[1]

[1] European Pest Control and Other includes goodwill related to pest control operations in Europe. See Note 14 for further discussion of these acquisitions and purchase price allocations.