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Schedule I - Condensed Financial Information of Registrant (Parent Company Only) (Condensed Statements Of Financial Conditions) (Details) - USD ($) $ / shares in Units, $ in Millions | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Assets |  |  |  |
Cash and cash equivalents |  | $ 2,882 | $ 2,597 | $ 1,732
Investments in subsidiaries, equity basis | [1] | 22 | 23 |
Total assets |  | 71,676 | 60,547 | $ 61,162
Liabilities and stockholders' equity |  |  |  |
Accrued expenses and other liabilities |  | 295 | 153 |
Total liabilities |  | 63,736 | 53,391 |
Stockholders’ equity: |  |  |  |
Additional paid-in capital |  | 934 | 898 |
Retained earnings |  | 520 | 390 |
Accumulated other comprehensive income, net of income taxes of $0 and $0 as of December 31, 2019 and 2018 |  |  | (4) |
Treasury stock, at cost, 138,930 and 129,448 shares as of December 31, 2019 and 2018 |  | (3) | (3) |
Total stockholders' equity |  | 1,452 | 1,282 |
Total liabilities and stockholders' equity |  | $ 71,676 | $ 60,547 |
Common stock, par value |  | $ 0.01 | $ 0.01 |
Accumulated other comprehensive income tax |  | $ 0 | $ 0 |
Treasury stock shares |  | 138,930 | 129,448 |
Common Class A |  |  |  |
Stockholders’ equity: |  |  |  |
Common stock, $0.01 par value per share |  | $ 1 | $ 1 |
Common stock, par value |  | $ 0.01 |  |
Shares authorized |  | 1,000,000,000 | 1,000,000,000 |
Common stock, shares issued |  | 76,889,040 | 75,230,400 |
Common stock, shares outstanding |  | 76,750,110 | 75,100,952 |
Common Class B |  |  |  |
Stockholders’ equity: |  |  |  |
Common stock, $0.01 par value per share |  |  |  |
Shares authorized |  | 100 | 100 |
Common stock, shares issued |  | 100 | 100 |
Common stock, shares outstanding |  | 100 | 100 |
Parent Company [Member] |  |  |  |
Assets |  |  |  |
Cash and cash equivalents |  | $ 1 | $ 1 |
Investments in subsidiaries, equity basis |  | 1,469 | 1,302 |
Other assets |  | 143 | 152 |
Total assets |  | 1,613 | 1,455 |
Liabilities and stockholders' equity |  |  |  |
Payable to affiliates |  | 152 | 171 |
Accrued expenses and other liabilities |  | 9 | 2 |
Total liabilities |  | 161 | 173 |
Stockholders’ equity: |  |  |  |
Additional paid-in capital |  | 934 | 898 |
Retained earnings |  | 520 | 390 |
Accumulated other comprehensive income, net of income taxes of $0 and $0 as of December 31, 2019 and 2018 |  |  | (4) |
Treasury stock, at cost, 138,930 and 129,448 shares as of December 31, 2019 and 2018 |  | (3) | (3) |
Total stockholders' equity |  | 1,452 | 1,282 |
Total liabilities and stockholders' equity |  | $ 1,613 | $ 1,455 |
Common stock, par value |  | $ 0.01 | $ 0.01 |
Accumulated other comprehensive income tax |  | $ 0 | $ 0 |
Treasury stock shares |  | 138,930 | 129,448 |
Parent Company [Member] | Common Class A |  |  |  |
Stockholders’ equity: |  |  |  |
Common stock, $0.01 par value per share |  | $ 1 | $ 1 |
Shares authorized |  | 1,000,000,000 | 1,000,000,000 |
Common stock, shares issued |  | 76,889,040 | 75,230,400 |
Common stock, shares outstanding |  | 76,750,110 | 75,100,952 |
Parent Company [Member] | Common Class B |  |  |  |
Stockholders’ equity: |  |  |  |
Common stock, $0.01 par value per share |  |  |  |
Shares authorized |  | 100 | 100 |
Common stock, shares issued |  | 100 | 100 |
Common stock, shares outstanding |  | 100 | 100 |
[1] | The Company’s share of income or losses is included in other income in the consolidated statements of comprehensive income.

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