XML 76 R43.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Cash Flow Information (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2017
Supplemental Cash Flow Information [Abstract] |
Schedule of Cash Paid for Interest and Income Taxes | Cash paid for interest and income taxes was as follows:
| 2017 | 2016 | 2015
Interest, net of amount capitalized | $ | 508 |  | $ | 524 |  | $ | 487 |
Income taxes, net of amount refunded | $ | 118 |  | $ | 324 |  | $ | 345 |
Schedule of Cash Paid for Acquisitions Including Non-Controlling Interest | The details related to cash paid for acquisitions were as follows:
| 2017 | 2016 | 2015
Assets acquired | $ | — |  | $ | — |  | $ | 2,003 |
Liabilities assumed | — |  | — |  | (868 | )
Equity issued | — |  | — |  | (870 | )
Working capital adjustment | — |  | (10 | ) | — |
Increase in Arconic’s shareholders’ equity | — |  | — |  | (60 | )
Cash paid | — |  | (10 | ) | 205 |
Less: cash acquired | — |  | — |  | 302 |
Net cash paid | $ | — |  | $ | (10 | ) | $ | (97 | )

X
- Definition Schedule of cash paid for acquisitions [Table Text Block] + References No definition available. + Details
Name: | arnc_ScheduleOfCashPaidForAcquisitionsTableTextBlock
Namespace Prefix: | arnc_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of supplemental cash flow information for the periods presented. + References No definition available. + Details
Name: | us-gaap_ScheduleOfCashFlowSupplementalDisclosuresTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_SupplementalCashFlowInformationAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration