Goodwill And Intangible Assets (Schedule Of Other Intangible Asset Balances For Continuing Operations) (Details) - USD ($) $ in Millions		9 Months Ended	12 Months Ended
		Sep. 30, 2020	Dec. 31, 2019
Finite Lived and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross		$ 1,596	$ 1,626
Accumulated Amortization		(483)	(457)
Net		1,113	1,169
Purchase accounting adjustments		26
Customer Relationships [Member]
Finite Lived and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross	[1]	640	659
Accumulated Amortization	[1]	(443)	(423)
Net	[1]	197	236
Purchase accounting adjustments			17
Other Intangible Assets [Member]
Finite Lived and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross	[2]	68	79
Accumulated Amortization	[2]	(41)	(34)
Net	[2]	28	45
Purchase accounting adjustments			9
Trade Names [Member]
Finite Lived and Indefinite Lived Intangible Assets by Major Class [Line Items]
Gross	[3]	888	888
Net	[3]	$ 888	$ 888

[1] Includes purchase accounting adjustments subsequent to December 31, 2019, primarily related to our acquisition of Nomor, of approximately $17 million.

[2] Includes purchase accounting adjustments subsequent to December 31, 2019, primarily related to our acquisition of Nomor, of approximately $9 million.

[3] Not subject to amortization.