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Consolidated Statements of Condition (Parenthetical) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2021
Statement of Financial Position [Abstract] |  |
Securities Available-for-sale, pledged | $ 1,016 | $ 1,278
Preferred stock, par | $ 0.01 | $ 0.01
Preferred stock, shares authorized | 5,000,000 | 5,000,000
Preferred stock, Series A shares issued | 515,000 | 515,000
Preferred stock, Series A shares outstanding | 515,000 | 515,000
Common stock, par | $ 0.01 | $ 0.01
Common stock, shares authorized | 900,000,000 | 900,000,000
Common stock, shares issued | 490,439,070 | 490,439,070
Common stock, shares outstanding | 467,024,144 | 465,015,643
Treasury stock, shares | 23,414,926 | 25,423,427
Net unrealized loss on securities available for sale, tax | $ 99 | $ 17
Net unrealized loss on pension and post-retirement obligations, tax | 12 | 12
Cash flow hedges tax component | $ (3) | $ 3

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