Goodwill and Other Intangible Assets (Details 2) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Identifiable intangibles
Gross Carrying Amount	$ 159		$ 159		$ 162
Accumulated Amortization	(57)		(57)		(52)
Net	102		$ 102		110
Finite-Lived Intangible Asset, Useful Life			20 years
Amortization expense	2	$ 2	$ 6	$ 6
Total estimated amortization expense for the five succeeding fiscal years
Remainder of 2020	2		2
2021	8		8
2022	8		8
2023	8		8
2024	8		8
2025	8		8
Customer relationships
Identifiable intangibles
Gross Carrying Amount	128		128		131
Accumulated Amortization	(49)		(49)		(45)
Net	79		79		86
Trade names
Identifiable intangibles
Gross Carrying Amount	31		31		31
Accumulated Amortization	(8)		(8)		(7)
Net	$ 23		$ 23		$ 24

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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