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Stockholders' Equity And Accumulated Other Comprehensive Income (Loss) (Narrative) (Details) $ / shares in Units, shares in Thousands	3 Months Ended					6 Months Ended
	Sep. 30, 2022 $ / shares	Jun. 30, 2022 USD ($) $ / shares shares	Mar. 31, 2022 USD ($) $ / shares shares	Jun. 30, 2021 USD ($) $ / shares	Mar. 31, 2021 USD ($) $ / shares	Jun. 30, 2022 USD ($) $ / shares	Jun. 30, 2021 USD ($) $ / shares	May 15, 2029 USD ($)	Sep. 15, 2025 USD ($)	Sep. 15, 2024 USD ($)	Apr. 20, 2022 USD ($)	Apr. 21, 2021 USD ($)
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Dividends, Preferred Stock		$ (25,000,000)	$ (24,000,000)	$ (29,000,000)	$ (28,000,000)	$ (49,000,000)	$ (57,000,000)
Stock repurchase plan, authorized amount											$ 2,500,000,000	$ 2,500,000,000
Stock Repurchased During Period, Value		$ 15,000,000	$ 215,000,000
Cash dividend declared (in dollars per share) | $ / shares		$ 0.17	$ 0.17	$ 0.155	$ 0.155	$ 0.34	$ 0.31
Stock repurchased (in shares) | shares		725	9,100
Banking Regulation, Capital Conservation Buffer, Capital Conserved, Minimum		0.025				0.025
Series A Preferred Stock
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Dividends, Preferred Stock							$ (16,000,000)
Series E Preferred Stock
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Dividends, Preferred Stock						$ (8,000,000)
Series B, C and D Preferred Stock
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Dividends, Preferred Stock						$ (41,000,000)	$ (41,000,000)
Subsequent Event [Member]
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
Cash dividend declared (in dollars per share) | $ / shares	$ 0.2
Subsequent Event [Member] | Series B Preferred Stock [Member]
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
ExcessofRedemptionAmountOverCarryingAmount										$ 67,000,000
PreferredDividendsReductiontoRetainedEarningsatRedemption										$ 52,000,000
Subsequent Event [Member] | Series C Preferred Stock [Member]
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
ExcessofRedemptionAmountOverCarryingAmount								$ 10,000,000
Subsequent Event [Member] | Series D Preferred Stock [Member]
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
ExcessofRedemptionAmountOverCarryingAmount									$ 4,000,000
Subsequent Event [Member] | Series E Preferred Stock
Stockholders' Equity And Comprehensive Income (Loss) [Line Items]
ExcessofRedemptionAmountOverCarryingAmount									$ 10,000,000

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