Employee Benefit Plans (Target and Actual Asset Allocations) (Details)	Dec. 31, 2022	Dec. 31, 2021
Master Trust
Defined Benefit Plan Disclosure [Line Items]
Target allocation	100.00%
Actual asset allocation	100.00%	100.00%
Master Trust | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Target allocation	100.00%
Actual asset allocation	100.00%	100.00%
Master Trust | Global equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation	45.00%
Actual asset allocation	49.00%	24.00%
Master Trust | Global equity securities | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Target allocation	14.00%
Actual asset allocation	14.00%	24.00%
Master Trust | Global private equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation	2.00%
Actual asset allocation	2.00%	1.00%
Master Trust | Global private equity securities | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Target allocation	1.00%
Actual asset allocation		1.00%
Master Trust | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation	35.00%
Actual asset allocation	30.00%	62.00%
Master Trust | Debt securities | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Target allocation	80.00%
Actual asset allocation	80.00%	62.00%
Master Trust | Return seeking debt securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation	7.00%
Actual asset allocation	7.00%	4.00%
Master Trust | Return seeking debt securities | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Target allocation	2.00%
Actual asset allocation	2.00%	4.00%
Master Trust | Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Target allocation	4.00%
Actual asset allocation	6.00%	3.00%
Master Trust | Hedge funds | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Target allocation	1.00%
Actual asset allocation	2.00%	3.00%
Master Trust | Real estate and cash
Defined Benefit Plan Disclosure [Line Items]
Target allocation	7.00%
Actual asset allocation	6.00%	6.00%
Master Trust | Real estate and cash | Other Post-Retirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Target allocation	2.00%
Actual asset allocation	2.00%	6.00%
OPEB
Defined Benefit Plan Disclosure [Line Items]
Target allocation	100.00%
Actual asset allocation	100.00%	100.00%
OPEB | U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation	30.00%
Actual asset allocation	12.00%	19.00%
OPEB | Non-U.S. equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation	5.00%
Actual asset allocation	5.00%	5.00%
OPEB | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation	45.00%
Actual asset allocation	11.00%	18.00%
OPEB | Real estate
Defined Benefit Plan Disclosure [Line Items]
Target allocation	1.00%
Actual asset allocation	3.00%	3.00%
OPEB | Cash
Defined Benefit Plan Disclosure [Line Items]
Target allocation	19.00%
Actual asset allocation	69.00%	55.00%