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Summary of Accounting Principles (Details) € in Millions, $ in Millions | Dec. 31, 2016 USD ($) | Dec. 31, 2016 EUR (€) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
--- | --- | --- | --- | ---
Accounting Policies [Abstract] |  |  |  |
Restricted Cash And Cash Equivalents | $ 32 |  | $ 45 | $ 255
Unbilled Contracts Receivable | 2,786 |  | 2,318 |
Contract Receivable Retainage | 106 |  | 141 |
Excess Of Replacement Or Current Costs Over Stated LIFO Value | 114 |  | 127 |
Hedging Liabilities, Noncurrent | € |  | € 2,950 |  |
Hedging Liabilities, Current | € |  | € 500 |  |
Commercial Aerospace [Member] |  |  |  |
Accounting Policies [Abstract] |  |  |  |
Unbilled Contracts Receivable | $ 1,169 |  | $ 1,091 |

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- Definition The carrying amounts of cash and cash equivalent items which are restricted as to withdrawal or usage. Restrictions may include legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or entity statements of intention with regard to particular deposits; however, time deposits and short-term certificates of deposit are not generally included in legally restricted deposits. Excludes compensating balance arrangements that are not agreements which legally restrict the use of cash amounts shown on the balance sheet. This element is for unclassified presentations; for classified presentations there is a separate and distinct element. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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