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Intangible Assets (Details) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2018
Jun. 30, 2018
Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]          
Intangible Assets Including Goodwill Translation Adjustment $ 3,000,000        
Definite-Lived Intangible Assets [Abstract]          
Finite-Lived Intangible Assets, Gross 155,000,000       $ 149,000,000
Goodwill, Acquired During Period     $ 0    
Finite-Lived Intangible Assets, Accumulated Amortization 70,000,000       64,000,000
Net Carrying Value 85,000,000       85,000,000
Goodwill         47,000,000
Goodwill and Indefinite-lived Intangible Assets, Net 48,000,000       47,000,000
Goodwill and indefinite-lived intangible assets [Abstract]          
Goodwill, Gross 48,000,000       47,000,000
Intangible Assets, Gross (Including Goodwill) 203,000,000       196,000,000
Intangible Assets Net Including Goodwill 133,000,000       132,000,000
Finite-lived Intangible Assets Acquired 2,000,000        
Amortization expense (4,000,000) $ (3,000,000)      
Future Amortization Expense, Year One 16,000,000        
Finite-Lived Intangible Assets, Amortization Expense, Year Two 16,000,000        
Finite-Lived Intangible Assets, Amortization Expense, Year Three 13,000,000        
Finite-Lived Intangible Assets, Amortization Expense, Year Four 10,000,000        
Finite-Lived Intangible Assets, Amortization Expense, Year Five 10,000,000        
Other Finite-Lived Intangible Assets, Gross $ 0       2,000,000
In Process Research and Development [Member]          
Definite-Lived Intangible Assets [Abstract]          
Finite-Lived Intangible Asset, Useful Life 36 months        
Developed Technology Rights [Member]          
Definite-Lived Intangible Assets [Abstract]          
Finite-Lived Intangible Asset, Useful Life 8 years        
Finite-Lived Intangible Assets, Gross $ 41,000,000       40,000,000
Finite-Lived Intangible Assets, Accumulated Amortization 29,000,000       27,000,000
Net Carrying Value 12,000,000       13,000,000
Goodwill and indefinite-lived intangible assets [Abstract]          
Finite-lived Intangible Assets Acquired 0        
Amortization expense (1,000,000)        
Finite Lived Intangible Assets, Foreign Currency Translation Gain (Loss) $ 0        
Customer Relationships [Member]          
Definite-Lived Intangible Assets [Abstract]          
Finite-Lived Intangible Asset, Useful Life 10 years        
Finite-Lived Intangible Assets, Gross $ 91,000,000       88,000,000
Finite-Lived Intangible Assets, Accumulated Amortization 39,000,000       35,000,000
Net Carrying Value 52,000,000       53,000,000
Goodwill and indefinite-lived intangible assets [Abstract]          
Finite-lived Intangible Assets Acquired 0        
Amortization expense (3,000,000)        
Finite Lived Intangible Assets, Foreign Currency Translation Gain (Loss) $ 2,000,000        
Software and Software Development Costs [Member]          
Definite-Lived Intangible Assets [Abstract]          
Finite-Lived Intangible Asset, Useful Life 4 years        
Finite-Lived Intangible Assets, Gross $ 10,000,000       8,000,000
Finite-Lived Intangible Assets, Accumulated Amortization 1,000,000       1,000,000
Net Carrying Value 9,000,000       7,000,000
Goodwill and indefinite-lived intangible assets [Abstract]          
Capitalized Software Development Costs for Software Sold to Customers 2,000,000        
Amortization expense 0        
Finite Lived Intangible Assets, Foreign Currency Translation Gain (Loss) $ 0        
Other [Member]          
Definite-Lived Intangible Assets [Abstract]          
Finite-Lived Intangible Asset, Useful Life 23 years        
Finite-Lived Intangible Assets, Gross $ 13,000,000       13,000,000
Finite-Lived Intangible Assets, Accumulated Amortization 1,000,000       1,000,000
Net Carrying Value 12,000,000       12,000,000
Goodwill and indefinite-lived intangible assets [Abstract]          
Amortization expense 0        
Finite Lived Intangible Assets, Foreign Currency Translation Gain (Loss) 0        
Goodwill [Member]          
Definite-Lived Intangible Assets [Abstract]          
Finite-Lived Intangible Assets, Accumulated Amortization 0       $ 0
Goodwill [Member]          
Goodwill and indefinite-lived intangible assets [Abstract]          
Amortization expense 0        
Goodwill, Foreign Currency Translation Gain (Loss) $ 1,000,000        
Scenario, Forecast [Member]          
Goodwill and indefinite-lived intangible assets [Abstract]          
Other Finite-Lived Intangible Assets, Gross       $ 2,000,000