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Goodwill and Intangible Assets, Net Definite-lived and Indefinite-lived Intangible Assets Table (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Definite-lived intangible assets: [Abstract] |  |  |  |  |  |  |
Gross carrying amount of definite-lived intangible assets | $ 679 |  |  |  | $ 679 |  | $ 712
Accumulated amortization of definite-lived intangible assets | (292) |  |  |  | (292) |  | (273)
Net carrying amount of definite-lived intangible assets | 387 |  |  |  | 387 |  | 439
Net carrying amount of indefinite-lived intangible assets | 62 |  |  |  | 62 |  | 62
Intangible assets, net | 449 |  |  |  | 449 |  | 501
Amortization of intangible assets | 10 |  |  | $ 12 | 31 | $ 36 |
Customer relationships |  |  |  |  |  |  |
Definite-lived intangible assets: [Abstract] |  |  |  |  |  |  |
Gross carrying amount of definite-lived intangible assets | 395 |  |  |  | 395 |  | 396
Accumulated amortization of definite-lived intangible assets | (149) |  |  |  | (149) |  | (134)
Net carrying amount of definite-lived intangible assets | 246 |  |  |  | 246 |  | 262
Other |  |  |  |  |  |  |
Definite-lived intangible assets: [Abstract] |  |  |  |  |  |  |
Gross carrying amount of definite-lived intangible assets | 284 |  |  |  | 284 |  | 316
Accumulated amortization of definite-lived intangible assets | (143) |  |  |  | (143) |  | (139)
Net carrying amount of definite-lived intangible assets | $ 141 |  |  |  | $ 141 |  | $ 177
Metals Segment |  |  |  |  |  |  |
Definite-lived intangible assets: [Abstract] |  |  |  |  |  |  |
Definite-lived intangible assets acquired |  | $ 6 |  |  |  |  |
Automotive Segment |  |  |  |  |  |  |
Definite-lived intangible assets: [Abstract] |  |  |  |  |  |  |
Definite-lived intangible assets acquired |  |  | $ 1 |  |  |  |

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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -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 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 928 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004 Reference 2: 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 + Details
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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 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),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 + Details
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