Significant Accounting Policies - Exchange Rates for U.S. Dollars into Euros Applicable for Translation of NXP's Financial Statements (Detail) - € / $ |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
||
|---|---|---|---|---|---|
| Financial Statement Details [Line Items] | |||||
| Exchange rates for U.S. dollars into euros | 1.1451 | 1.1932 | 1.0474 | ||
| Average [Member] | |||||
| Financial Statement Details [Line Items] | |||||
| Exchange rates for U.S. dollars into euros | [1] | 1.1794 | 1.1310 | 1.1065 | |
| Maximum [Member] | |||||
| Financial Statement Details [Line Items] | |||||
| Exchange rates for U.S. dollars into euros | 1.1352 | 1.0474 | 1.0474 | ||
| Minimum [Member] | |||||
| Financial Statement Details [Line Items] | |||||
| Exchange rates for U.S. dollars into euros | 1.2431 | 1.1932 | 1.1423 | ||
| |||||