Retirement Plans (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Rate of employee contribution from earnings		80.00%
Matching contribution allocation rate first time		100.00%
Employee contribution rate for first time matching		3.00%
Matching contribution allocation rate second time		50.00%
Employees contribution rate for second time matching		3.00%
Employer contribution in common stock		$ 33	$ 32	$ 31
Minimum range of eligible compensation for noncontributory profit sharing feature		0.00%
Maximum range of eligible compensation for noncontributory profit sharing feature		3.50%
Accrued profit sharing expense		$ 19	24	$ 7
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
One-time expense	$ 28
Supplemental Employee Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Benefit liability		10	12
Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Benefit liability		$ 1	$ 1