Revenue Recognition - Additional Information (Details) $ in Billions	9 Months Ended
	Sep. 30, 2019 USD ($)
Revenue from Contract with Customer [Abstract]
Remaining performance obligation	$ 5.2
Minimum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract term	1 year
Length of customer life	12 months
Maximum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Contract term	7 years
Length of customer life	60 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-10-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, percentage	69.00%
Remaining performance obligation, timing of satisfaction	2 years 3 months