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Revenue
 12 Months Ended
Dec. 31, 2019
Revenue from Contract with Customer [Abstract]  
Revenue Revenue
Disaggregation of revenue
The Company has attributed net sales to the geographic area based on the location of the entity selling the final product. Of the net sales, exports from the U.S. to other regions amounted to approximately $175 million, $356 million and $159 million in 2019, 2018 and 2017, respectively.
In the following tables, revenue is disaggregated by primary region and products of revenue recognition.
Net Sales by Region
Year Ended December 31
201920182017
 ElectronicsBrake
Systems		TotalElectronicsBrake
Systems		TotalElectronicsBrake
Systems		Total
Asia$350  $312  $662  $424  $370  $794  $489  $362  $851  
Americas556  60  616  696  58  754  698  114  812  
Europe624  —  624  680  —  680  663  —  663  
Total region sales1,530  372  1,902  1,799  428  2,228  1,850  476  2,326  
Less: intercompany sales—  —  —  —  —  —  (1) (3) (4) 
Total$1,530  $372  $1,902  $1,800  $428  $2,228  $1,849  $473  $2,322  
Net Sales by Products
Year Ended December 31
201920182017
 ElectronicsBrake
Systems		TotalElectronicsBrake
Systems		TotalElectronicsBrake
Systems		Total
Restraint Control Systems$822  $—  $822  $974  $—  $974  $1,073  $—  $1,073  
Active Safety products708  —  708  825  —  825  778  —  778  
Brake Systems—  372  $372  —  428  428  —  476  476  
Total product sales1,530  372  $1,902  1,799  428  2,228  1,850  476  2,326  
Less: intercompany sales—  —  —  —  —  —  (1) (3) (4) 
Total net sales$1,530  $372  $1,902  $1,800  $428  $2,228  $1,849  $473  $2,322  
The following tables provide information about receivables and contract assets from contracts with customers.
Contract Balances with Customers
As of December 31
 20192018
Receivables, net$253  $376  
Contract assets1
6  8  
1 Included in prepaid expenses and other contract assets in the Consolidated Balance Sheets
Changes in the contract asset balances during the period are as follows:
Change in Contract Balances with Customers1
Year Ended December 31
Contract assets2019
Beginning balance$8  
Increases due to revenue recognized25  
Decreases due to transfer to receivables(27) 
Ending balance$6  
1The contract asset is determined at each period end, this table reflects the rollforward of the period end balance.