Goodwill and Intangible Assets (Schedule Of Goodwill Balances For Continuing Operations By Reportable Segment And For Other Operations And Headquarters) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2018 USD ($)
Goodwill balances by segment for continuing operations
Balance at the beginning of the period	$ 2,256
Acquisitions	150
Impact of foreign exchange rates	(1)
Balance at the end of the period	2,405
Terminix [Member]
Goodwill balances by segment for continuing operations
Balance at the beginning of the period	1,605
Acquisitions	150
Impact of foreign exchange rates	(1)
Balance at the end of the period	1,754
American Home Shield [Member]
Goodwill balances by segment for continuing operations
Balance at the beginning of the period	476
Balance at the end of the period	476
Franchise Services Group [Member]
Goodwill balances by segment for continuing operations
Balance at the beginning of the period	176
Balance at the end of the period	$ 175