v3.6.0.2
Defined Contribution and Defined Benefit Plans (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Defined Contribution and Defined Benefit Plans [Abstract]      
Defined Contribution Plan, Cost Recognized $ 11 $ 12 $ 12
Employer Matching Contribution Percentage 100.00%    
Deferral Election Percentage For Employer Matching Contribution 5.00%    
Employee Deferral Limit Percentage 75.00%    
Defined Benefit Pension Plan, Percent of Eligible Participants 3.00%    
Defined Benefit Plan, Assets for Plan Benefits $ 18 14  
Pension and Other Postretirement Defined Benefit Plans, Liabilities 26 23  
Defined Benefit Plan, Amounts Recognized in Balance Sheet 8 9  
Defined Benefit Plan, Net Periodic Benefit Cost 2 2 $ 1
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax 5 5  
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year 3 $ 2  
Defined Benefit Plan, Estimated Future Employer Contributions in Next Fiscal Year 2    
Defined Benefit Plan, Expected Future Benefit Payments in Five Fiscal Years Thereafter $ 1