Pension Plans and Other Post-Retirement Benefit Plans (Tables)

3 Months Ended

Mar. 31, 2022

Compensation And Retirement Disclosure [Abstract]

Components of Net Periodic Benefit Cost for Pension Plans and Other Post-Retirement Benefit Plans

Components of net periodic benefit cost for pension plans and other post-retirement benefit plans:

	Successor
	For the three months ended
	March 31, 2022
	Pension plans			Other post-retirement benefit plans
	$			$
Service cost		6			—
Interest expense		9			1
Expected return on plan assets		(19	)		—
Net periodic benefit cost		(4	)		1

	Predecessor
	For the three months ended
	March 31, 2021
	Pension plans			Other post-retirement benefit plans
	$			$
Service cost		7			—
Interest expense		8			—
Expected return on plan assets		(16	)		—
Amortization of net actuarial loss		2			—
Net periodic benefit cost		1			—