Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2020

Retirement Benefits [Abstract]

Schedule of Net Benefit Costs

Net Periodic Cost (Benefit)
	Pension Benefits												Other Postretirement Benefits
	Three Months Ended June 30,						Six months ended June 30,						Three Months Ended June 30,						Six months ended June 30,
	2020			2019			2020			2019			2020			2019			2020			2019
Service cost	$	1		$	1		$	2		$	2		$	—		$	—		$	—		$	—
Interest cost	32			40			64			79			1			2			3			4
Expected return on plan assets	(54		)	(56		)	(108		)	(113		)	(1		)	(1		)	(2		)	(2		)
Amortization of prior service credit	—			—			—			—			(1		)	(2		)	(3		)	(3		)
Amortization of actuarial loss	15			11			30			22			1			2			3			3
Net periodic cost (benefit)	$	(6	)	$	(4	)	$	(12	)	$	(10	)	$	—		$	1		$	1		$	2