Retirement Benefits (Unaudited)

6 Months Ended

Jun. 30, 2023

Retirement Benefits [Abstract]

RETIREMENT BENEFITS

RETIREMENT BENEFITS

The cost to the company of its pension and other postretirement benefit (OPB) plans is shown in the following table:

	Three Months Ended June 30								Six Months Ended June 30
	Pension Benefits				OPB				Pension Benefits				OPB
$ in millions	2023		2022		2023		2022		2023		2022		2023		2022
Components of net periodic benefit cost (benefit)
Service cost	$	59	$	92	$	1	$	2	$	118	$	184	$	2	$	4
Interest cost	392		284		16		12		784		568		33		24
Expected return on plan assets	(525)		(661)		(21)		(27)		(1,049)		(1,321)		(42)		(55)
Amortization of prior service (credit) cost	—		—		—		(1)		—		—		—		(1)
Net periodic benefit cost (benefit)	$	(74)	$	(285)	$	(4)	$	(14)	$	(147)	$	(569)	$	(7)	$	(28)

Employer Contributions

The company sponsors defined benefit pension and OPB plans, as well as defined contribution plans. We fund our defined benefit pension plans annually in a manner consistent with the Employee Retirement Income Security Act of 1974, as amended by the Pension Protection Act of 2006.

Contributions made by the company to its retirement plans are as follows:

	Three Months Ended June 30				Six Months Ended June 30
$ in millions	2023		2022		2023		2022
Defined benefit pension plans	$	25	$	25	$	54	$	51
OPB plans	10		10		21		20
Defined contribution plans	146		122		361		321