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Basis of Presentation and Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2018
Accounting Policies [Abstract]  
Disaggregation of Revenue
The following table provides information about disaggregated revenue by major service line, the timing of revenue recognition and a reconciliation of the disaggregated revenue by reportable segments. Refer to Note 2 – Segment Reporting for additional information on the Company's reportable segments.

(in millions)
 
Year Ended December 31, 2018
Commercial Industries:
 
 
Omni-channel communications
 
$
852

Human resource services
 
754

Industry services
 
941

Total Commercial Industries
 
2,547

Government Services
 
1,351

Transportation
 
729

Other:
 
 
Divestitures
 
752

Education
 
14

Total Other
 
766

Total Consolidated Revenue
 
$
5,393

 
 
 
Timing of Revenue Recognition:
 
 
Point in time
 
$
142

Over time
 
5,251

Total Revenue
 
$
5,393