XML 115 R96.htm IDEA: XBRL DOCUMENT v3.10.0.1
Segment Information - Narrative (Details)
$ in Millions
12 Months Ended
Dec. 31, 2018
USD ($)
segment
Dec. 31, 2017
USD ($)
Dec. 31, 2016
Concentration Risk [Line Items]      
Number of operating segments | segment 2    
Long-lived assets $ 1,113 $ 938  
Customer A | Customer Concentration Risk | Sales Revenue      
Concentration Risk [Line Items]      
Concentration risk, percentage 21.00% 21.00% 17.00%
Customer B | Customer Concentration Risk | Sales Revenue      
Concentration Risk [Line Items]      
Concentration risk, percentage 17.00% 17.00% 16.00%
Customer C | Customer Concentration Risk | Sales Revenue      
Concentration Risk [Line Items]      
Concentration risk, percentage 11.00% 12.00% 13.00%
Customer D | Customer Concentration Risk | Sales Revenue      
Concentration Risk [Line Items]      
Concentration risk, percentage   12.00% 13.00%
Customer E | Customer Concentration Risk | Sales Revenue      
Concentration Risk [Line Items]      
Concentration risk, percentage     11.00%
U.S.      
Concentration Risk [Line Items]      
Long-lived assets $ 315 $ 349  
Intangible assets and goodwill $ 117 $ 285