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Employee Benefit Plans - Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Domestic plan [member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year $ 14    
Multiemployer Plans, Plan Assets 287    
Multiemployer Plans, Accumulated Benefit Obligation 419    
Defined Benefit Plan, Benefit Obligation 394 $ 425 $ 424
U.K. plan [member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year 6    
Defined Benefit Plan, Benefit Obligation 391 415 380
International plans [member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year 3    
Defined Benefit Plan, Benefit Obligation 82 115 112
Other Benefit plans [member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Benefit Obligation 17 13  
Defined Contribution Plan, Cost Recognized $ 23 $ 23 $ 20
Supplemental Plan, Cost Recognized less than $1 million less than $1 million less than $1 million
Equity securities [member] | Domestic plan [member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Target Plan Asset Allocations 60.00% 60.00%  
Debt securities [member] | Domestic plan [member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Target Plan Asset Allocations 40.00% 40.00%  
Common collective trusts [member] | U.K. plan [member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Target Plan Asset Allocations 65.00% 65.00%  
Common collective trusts [member] | International plans [member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Target Plan Asset Allocations 65.00% 65.00%  
Bonds [member] | U.K. plan [member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Target Plan Asset Allocations 35.00% 35.00%  
Bonds [member] | International plans [member]      
Defined Benefit Plan Disclosure [Line Items]      
Defined Benefit Plan, Target Plan Asset Allocations 35.00% 35.00%