Significant Accounting Policies - Exchange Rates for U.S. Dollars into Euros Applicable for Translation of NXP's Financial Statements (Detail) - € / $ |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|---|
| Financial Statement Details [Line Items] | |||
| Exchange rates for U.S. dollars into euros | 1.2280 | 1.1217 | 1.1451 |
| average | |||
| Financial Statement Details [Line Items] | |||
| Exchange rates for U.S. dollars into euros | 1.1412 | 1.1210 | 1.1794 |
| high | |||
| Financial Statement Details [Line Items] | |||
| Exchange rates for U.S. dollars into euros | 1.0862 | 1.0935 | 1.1352 |
| low | |||
| Financial Statement Details [Line Items] | |||
| Exchange rates for U.S. dollars into euros | 1.2280 | 1.1476 | 1.2431 |