v3.22.0.1
Employee Benefit Plans (Schedule of Defined Benefit Plans Disclosures) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Change in Benefit Obligation [Roll Forward]      
Projected Benefit Obligation, Beginning of Period $ 2,623,000,000 $ 2,364,000,000  
Service cost 41,000,000 39,000,000 $ 31,000,000
Interest cost 51,000,000 68,000,000 80,000,000
Actuarial Gains (Losses) (73,000,000) 299,000,000  
Defined Benefit Plan, Benefit Obligation, Benefits Paid (173,000,000) (144,000,000)  
Administration Expenses (3,000,000) (3,000,000)  
Plan Settlements (29,000,000) 0  
Projected Benefit Obligation, End of Period 2,437,000,000 2,623,000,000 2,364,000,000
Change in Plan Assets [Roll Forward]      
Fair Value of Plan Assets, beginning of period 2,469,000,000 2,299,000,000  
Actual Return on Plan Assets (253,000,000) (303,000,000)  
Company Contributions 37,000,000 14,000,000  
Defined Benefit Plan, Plan Assets, Benefits Paid (173,000,000) (144,000,000)  
Administration Expenses (3,000,000) (3,000,000)  
Plan Settlements (29,000,000) 0  
Fair Value of Plan Assets, end of period 2,554,000,000 2,469,000,000 2,299,000,000
Funded Status and Accrued Benefit Cost at Measurement Date 117,000,000 (154,000,000)  
Amount recognized in the Consolidated Balance Sheets:      
Other assets (liabilities) 117,000,000 (154,000,000)  
Pre-tax amounts recognized in Accumulated Other Comprehensive (Income) Loss:      
Net actuarial loss 652,000,000 899,000,000  
Qualified Plan [Member] | Pension Plan [Member]      
Change in Benefit Obligation [Roll Forward]      
Projected Benefit Obligation, Beginning of Period 2,435,000,000 2,192,000,000  
Service cost 38,000,000 34,000,000 28,000,000
Interest cost 49,000,000 64,000,000 75,000,000
Actuarial Gains (Losses) (73,000,000) 278,000,000  
Defined Benefit Plan, Benefit Obligation, Benefits Paid (165,000,000) (130,000,000)  
Administration Expenses (3,000,000) (3,000,000)  
Plan Settlements 0 0  
Projected Benefit Obligation, End of Period 2,281,000,000 2,435,000,000 2,192,000,000
Change in Plan Assets [Roll Forward]      
Fair Value of Plan Assets, beginning of period 2,469,000,000 2,299,000,000  
Actual Return on Plan Assets (253,000,000) (303,000,000)  
Company Contributions 0 0  
Defined Benefit Plan, Plan Assets, Benefits Paid (165,000,000) (130,000,000)  
Administration Expenses (3,000,000) (3,000,000)  
Plan Settlements 0 0  
Fair Value of Plan Assets, end of period 2,554,000,000 2,469,000,000 2,299,000,000
Funded Status and Accrued Benefit Cost at Measurement Date 273,000,000 34,000,000  
Amount recognized in the Consolidated Balance Sheets:      
Other assets (liabilities) 273,000,000 34,000,000  
Pre-tax amounts recognized in Accumulated Other Comprehensive (Income) Loss:      
Net actuarial loss 590,000,000 819,000,000  
Nonqualified Plan [Member] | Supplemental Employee Retirement Plan [Member]      
Change in Benefit Obligation [Roll Forward]      
Projected Benefit Obligation, Beginning of Period 188,000,000 172,000,000  
Service cost 3,000,000 5,000,000 3,000,000
Interest cost 2,000,000 4,000,000 5,000,000
Actuarial Gains (Losses) 0 21,000,000  
Defined Benefit Plan, Benefit Obligation, Benefits Paid (8,000,000) (14,000,000)  
Administration Expenses 0 0  
Plan Settlements (29,000,000) 0  
Projected Benefit Obligation, End of Period 156,000,000 188,000,000 172,000,000
Change in Plan Assets [Roll Forward]      
Fair Value of Plan Assets, beginning of period 0 0  
Actual Return on Plan Assets 0 0  
Company Contributions 37,000,000 14,000,000  
Defined Benefit Plan, Plan Assets, Benefits Paid (8,000,000) (14,000,000)  
Administration Expenses 0 0  
Plan Settlements (29,000,000) 0  
Fair Value of Plan Assets, end of period 0 0 $ 0
Funded Status and Accrued Benefit Cost at Measurement Date (156,000,000) (188,000,000)  
Amount recognized in the Consolidated Balance Sheets:      
Other assets (liabilities) (156,000,000) (188,000,000)  
Pre-tax amounts recognized in Accumulated Other Comprehensive (Income) Loss:      
Net actuarial loss 62,000,000 80,000,000  
Other Assets [Member]      
Amount recognized in the Consolidated Balance Sheets:      
Other assets (liabilities) 273,000,000 34,000,000  
Other Assets [Member] | Qualified Plan [Member] | Pension Plan [Member]      
Amount recognized in the Consolidated Balance Sheets:      
Other assets (liabilities) 273,000,000 34,000,000  
Other Assets [Member] | Nonqualified Plan [Member] | Supplemental Employee Retirement Plan [Member]      
Amount recognized in the Consolidated Balance Sheets:      
Other assets (liabilities) 0 0  
Other Liabilities [Member]      
Amount recognized in the Consolidated Balance Sheets:      
Other assets (liabilities) (156,000,000) (188,000,000)  
Other Liabilities [Member] | Qualified Plan [Member] | Pension Plan [Member]      
Amount recognized in the Consolidated Balance Sheets:      
Other assets (liabilities) 0 0  
Other Liabilities [Member] | Nonqualified Plan [Member] | Supplemental Employee Retirement Plan [Member]      
Amount recognized in the Consolidated Balance Sheets:      
Other assets (liabilities) $ (156,000,000) $ (188,000,000)