Revenue from Contracts with Customers - Summary of Significant Changes in Net Contract Assets and Contract Liabilities Balances (Parenthetical) (Detail) $ in Millions	12 Months Ended
Dec. 31, 2022 USD ($)
Revenue from Contract with Customer [Abstract]
Adjustments	$ 11.1

Amount of increase (decrease) in revenue recognized for cumulative catch-up adjustment from change in estimate of transaction price which (increases) decreases obligation to transfer good or service to customer for which consideration from customer has been received or is due. Includes, but is not limited to, change in assessment of whether estimate of variable consideration is constrained.

No definition available.

Name:	ck0000949039_ReclassificationOfAmountsToCustomerAdvances
Namespace Prefix:	ck0000949039_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration