Goodwill And Other Intangibles (Identifiable Intangible Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 847	$ 924
Accumulated Amortization	454	442
Net Intangible Assets	393	482
Customer relationships and lists
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	542	610
Accumulated Amortization	247	247
Net Intangible Assets	295	363
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	67	72
Accumulated Amortization	67	72
Net Intangible Assets	0	0
Tradenames, patents and trademarks, and developed technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	174	172
Accumulated Amortization	90	72
Net Intangible Assets	84	100
Land and water rights
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	8	8
Accumulated Amortization	2	2
Net Intangible Assets	6	6
Software
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	26	24
Accumulated Amortization	25	23
Net Intangible Assets	1	1
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	30	38
Accumulated Amortization	23	26
Net Intangible Assets	$ 7	$ 12