Fair Value Measurements Investment Fair Value (Details) - USD ($) $ in Millions | Jun. 30, 2015 | Dec. 31, 2014 |
Investments [Abstract] | | | |
Investments | | $ 14,466 | $ 14,500 |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | 977 | 337 |
Investment Segment [Member] | | | |
Investments [Abstract] | | | |
Investments | | 13,952 | 13,961 |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | 977 | 337 |
Investment Segment [Member] | Fair Value, Measurements, Recurring [Member] | | | |
Investments [Abstract] | | | |
Investments | | 13,952 | 13,961 |
Derivative contracts, at fair value (asset) | [1] | 144 | 3 |
Assets, Fair Value Disclosure | | 14,096 | 13,964 |
Marketable Securities, Equity Securities [Abstract] | | | |
Derivative contracts at fair value (liability) | [2] | 641 | 614 |
Mortgage-backed securities: [Abstract] | | | |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | | 1,618 | 951 |
Investment Segment [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | 974 | 334 |
Trading Securities | | 13,692 | 13,659 |
Investment Segment [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Basic Materials [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | 13 | 0 |
Trading Securities | | 95 | 0 |
Investment Segment [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Communications [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 2,698 | 2,846 |
Investment Segment [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Consumer, non-cyclical [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 2,573 | 2,308 |
Investment Segment [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Consumer, cyclical [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | 908 | 334 |
Trading Securities | | 295 | 436 |
Investment Segment [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Diversified [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 24 | 23 |
Investment Segment [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Energy sector [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 1,076 | 1,895 |
Investment Segment [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Financial [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 213 | 417 |
Investment Segment [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Funds [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | 53 | 0 |
Investment Segment [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Industrial [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 233 | 99 |
Investment Segment [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Technology [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 6,485 | 5,635 |
Investment Segment [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 94 | 129 |
Investment Segment [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Consumer, cyclical [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 62 | 75 |
Investment Segment [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Energy sector [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 3 | 19 |
Investment Segment [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Financial [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 5 | 7 |
Investment Segment [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Utilities [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 24 | 28 |
Investment Segment [Member] | Fair Value, Measurements, Recurring [Member] | Collateralized Mortgage Backed Securities [Member] | Financial [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 166 | 173 |
Investment Segment [Member] | Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Consumer, non-cyclical [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | 977 | 337 |
Investment Segment [Member] | Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Funds [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | 3 | 3 |
Investment Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | | | |
Investments [Abstract] | | | |
Investments | | 13,552 | 13,639 |
Derivative contracts, at fair value (asset) | [1] | 0 | 0 |
Assets, Fair Value Disclosure | | 13,552 | 13,639 |
Marketable Securities, Equity Securities [Abstract] | | | |
Derivative contracts at fair value (liability) | [2] | 0 | 0 |
Mortgage-backed securities: [Abstract] | | | |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | | 948 | 334 |
Investment Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | 948 | 334 |
Trading Securities | | 13,552 | 13,639 |
Investment Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Basic Materials [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | 0 | 0 |
Trading Securities | | 65 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Communications [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 2,698 | 2,846 |
Investment Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Consumer, non-cyclical [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 2,573 | 2,308 |
Investment Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Consumer, cyclical [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | 908 | 334 |
Trading Securities | | 295 | 436 |
Investment Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Diversified [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 24 | 23 |
Investment Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Energy sector [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 1,050 | 1,895 |
Investment Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Financial [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 135 | 417 |
Investment Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Funds [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | 40 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Industrial [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 227 | 79 |
Investment Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Technology [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 6,485 | 5,635 |
Investment Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Consumer, cyclical [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Energy sector [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Financial [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Utilities [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Collateralized Mortgage Backed Securities [Member] | Financial [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Consumer, non-cyclical [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | 948 | 334 |
Investment Segment [Member] | Fair Value, Inputs, Level 1 [Member] | Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Funds [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | | | |
Investments [Abstract] | | | |
Investments | | 338 | 247 |
Derivative contracts, at fair value (asset) | [1] | 144 | 3 |
Assets, Fair Value Disclosure | | 482 | 250 |
Marketable Securities, Equity Securities [Abstract] | | | |
Derivative contracts at fair value (liability) | [2] | 641 | 614 |
Mortgage-backed securities: [Abstract] | | | |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | | 670 | 617 |
Investment Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | 26 | 0 |
Trading Securities | | 140 | 20 |
Investment Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Basic Materials [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | 13 | 0 |
Trading Securities | | 30 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Communications [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Consumer, non-cyclical [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Consumer, cyclical [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | 0 | 0 |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Diversified [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Energy sector [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 26 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Financial [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 78 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Funds [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | 13 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Industrial [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 6 | 20 |
Investment Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Technology [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 32 | 54 |
Investment Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Consumer, cyclical [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Energy sector [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 3 | 19 |
Investment Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Financial [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 5 | 7 |
Investment Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Utilities [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 24 | 28 |
Investment Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Collateralized Mortgage Backed Securities [Member] | Financial [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 166 | 173 |
Investment Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Consumer, non-cyclical [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | 29 | 3 |
Investment Segment [Member] | Fair Value, Inputs, Level 2 [Member] | Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Funds [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | 3 | 3 |
Investment Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | | | |
Investments [Abstract] | | | |
Investments | | 62 | 75 |
Derivative contracts, at fair value (asset) | [1] | 0 | 0 |
Assets, Fair Value Disclosure | | 62 | 75 |
Marketable Securities, Equity Securities [Abstract] | | | |
Derivative contracts at fair value (liability) | [2] | 0 | 0 |
Mortgage-backed securities: [Abstract] | | | |
Financial and Nonfinancial Liabilities, Fair Value Disclosure | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | 0 | 0 |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Basic Materials [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | 0 | 0 |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Communications [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Consumer, non-cyclical [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Consumer, cyclical [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | 0 | 0 |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Diversified [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Energy sector [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Financial [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Funds [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Industrial [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Technology [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 62 | 75 |
Investment Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Consumer, cyclical [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 62 | 75 |
Investment Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Energy sector [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Financial [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Corporate Debt Securities [Member] | Utilities [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Collateralized Mortgage Backed Securities [Member] | Financial [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Trading Securities | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Consumer, non-cyclical [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | 0 | 0 |
Investment Segment [Member] | Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring [Member] | Debt Securities [Member] | Funds [Member] | | | |
Marketable Securities, Equity Securities [Abstract] | | | |
Securities sold, not yet purchased, at fair value | | $ 0 | $ 0 |
| |
[1] | Included in other assets in our condensed consolidated balance sheets. | |
[2] | Included in accrued expenses and other liabilities in our condensed consolidated balance sheets. | |