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Revenue - Narrative (Details)
$ in Billions
Sep. 30, 2021
USD ($)
Revenue from Contract with Customer [Abstract]  
Remaining performance obligation $ 22
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation percentage 25.00%
Remaining performance obligation period 6 months