Long-Lived Assets - Summary of Aggregate Amortization Related to Customer Contract Costs (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2020
Minimum | Customer contract incentives
Finite Lived Intangible Assets [Line Items]
Intangible assets, amortization year	2023
Minimum | Capitalized costs
Finite Lived Intangible Assets [Line Items]
Intangible assets, amortization year	2021
Minimum | Capitalized commission fees
Finite Lived Intangible Assets [Line Items]
Intangible assets, amortization year	2021
Maximum | Customer contract incentives
Finite Lived Intangible Assets [Line Items]
Intangible assets, amortization year	2025
Maximum | Capitalized costs
Finite Lived Intangible Assets [Line Items]
Intangible assets, amortization year	2028
Maximum | Capitalized commission fees
Finite Lived Intangible Assets [Line Items]
Intangible assets, amortization year	2026
Policy election to expense fees as incurred	1 year