Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Summary of Significant Accounting Policies - Remaining Performance Obligation (Details)

v3.19.3
Basis of Presentation and Summary of Significant Accounting Policies - Remaining Performance Obligation (Details)
$ in Billions
Sep. 30, 2019
USD ($)
Accounting Policies [Abstract]  
Remaining performance obligation $ 1.0
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-10-01  
Accounting Policies [Abstract]  
Remaining performance obligation, percentage 8.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, period 3 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01  
Accounting Policies [Abstract]  
Remaining performance obligation, percentage 18.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, period 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01  
Accounting Policies [Abstract]  
Remaining performance obligation, percentage 18.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, period 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01  
Accounting Policies [Abstract]  
Remaining performance obligation, percentage 56.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation, period