Revenue Narrative - Remaining Performance Obligation Narrative (Details) $ in Billions |
Dec. 31, 2020
USD ($)
|
|---|---|
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
| Revenue, Remaining Performance Obligation, Amount | $ 1.3 |
| Network Services | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01 | |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | |
| Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | 10 years |