Long-Lived Assets - Summary of Aggregate Amortization Related to Intangible Assets (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2018
Acquired customer contracts
Finite Lived Intangible Assets [Line Items]
Estimated useful life		100 months
Acquired customer contracts | Minimum
Finite Lived Intangible Assets [Line Items]
Estimated useful life	3 years
Acquired customer contracts | Maximum
Finite Lived Intangible Assets [Line Items]
Estimated useful life	20 years
Acquired software | Minimum
Finite Lived Intangible Assets [Line Items]
Estimated useful life	4 years
Acquired software | Maximum
Finite Lived Intangible Assets [Line Items]
Estimated useful life	8 years
Internal use software | Minimum
Finite Lived Intangible Assets [Line Items]
Estimated useful life	1 year
Internal use software | Maximum
Finite Lived Intangible Assets [Line Items]
Estimated useful life	10 years