Revenues from Contracts with Customers - Remaining Performance Obligations (Detail 1)	Sep. 30, 2021
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2021-10-01
Remaining Performance Obligations [Line Items]
Remaining performance obligations, expected satisfaction, percentage	80.00%
Remaining performance obligations, expected timing of satisfaction	12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2022-10-01
Remaining Performance Obligations [Line Items]
Remaining performance obligations, expected satisfaction, percentage	20.00%
Remaining performance obligations, expected timing of satisfaction