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Intangible Assets (Schedule of Finite-Lived Intangible Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Intangible Assets
Cost	$ 6,122	$ 6,369
Accumulated Amortization	(2,990)	(2,484)
Net	3,132	3,885
Trademarks
Intangible Assets
Cost	43	48
Accumulated Amortization	0	0
Net	43	48
Customer relationships and other
Intangible Assets
Cost	6,011	6,220
Accumulated Amortization	(2,944)	(2,427)
Net	3,067	3,793
Trademarks
Intangible Assets
Cost	68	101
Accumulated Amortization	(46)	(57)
Net	$ 22	$ 44

X

- Definition

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

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

Amount before accumulated amortization of intangible assets, excluding goodwill.

+ References

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- Definition

Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
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