Goodwill And Intangible Assets (Schedule Of Goodwill Balances For Continuing Operations By Reportable Segment And For Other Operations And Headquarters) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2020 USD ($)
Goodwill balances by segment for continuing operations
Balance at the beginning of the period	$ 2,096
Acquisitions	9
Impact of foreign exchange rates	(2)
Balance at the end of the period	2,103
Terminix [Member]
Goodwill balances by segment for continuing operations
Balance at the beginning of the period	1,946
Acquisitions	8
Impact of foreign exchange rates	(1)
Balance at the end of the period	1,953
European Pest Control And Other [Member]
Goodwill balances by segment for continuing operations
Balance at the beginning of the period	150	[1]
Acquisitions	1	[1]
Impact of foreign exchange rates	0	[1]
Balance at the end of the period	$ 150	[1]

[1] European Pest Control and Other includes goodwill related to pest control operations in Europe. See Note 13 for further discussion of these acquisitions and purchase price allocations.