v3.20.4
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