Employee Benefit Plans - PAC - Asset Allocations (Details) - PAC	Dec. 31, 2021
Minimum | Other Postretirement | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage	70.00%
Minimum | Other Postretirement | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage	20.00%
Maximum | Other Postretirement | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage	80.00%
Maximum | Other Postretirement | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage	30.00%
Maximum | Other Postretirement | Other
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage	1.00%
United States | Minimum | Pension | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage	55.00%
United States | Minimum | Pension | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage	25.00%
United States | Maximum | Pension | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage	85.00%
United States | Maximum | Pension | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage	35.00%
United States | Maximum | Pension | Other
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage	10.00%