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Clearing Operations (Narrative) (Details) kr in Millions | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Jan. 31, 2021 USD ($) | Jan. 31, 2021 SEK (kr) | Mar. 31, 2022 USD ($) fund contract | Mar. 31, 2021 USD ($) | Dec. 31, 2021 USD ($)
Clearing Operations [Line Items] |  |  |  |  |
Number of member sponsored default funds (in funds) | fund |  |  | 3 |  |
Regulatory |  |  | $ 8,000,000 | $ 7,000,000 |
Default fund contributions |  |  | 869,000,000 |  |
Default fund contributions and margin deposits |  |  | 13,902,000,000 |  |
Payments for default funds and margin deposits |  |  | 10,647,000,000 | 12,197,000,000 |
Proceeds from default funds and margin deposits |  |  | 10,275,000,000 | $ 12,002,000,000 |
Liability due to market default |  |  | 0 |  |
Liability Waterfall |  |  |  |  |
Clearing Operations [Line Items] |  |  |  |  |
Junior capital, cash deposits and pledged assets |  |  | 42,000,000 |  |
Senior capital, cash deposits and pledged assets |  |  | 23,000,000 |  |
Committed capital |  |  | 67,000,000 |  |
Utilize as capital resources |  |  |  |  |
Clearing Operations [Line Items] |  |  |  |  |
Default fund contributions |  |  | 764,000,000 |  |
Utilize as member posted surplus balance |  |  |  |  |
Clearing Operations [Line Items] |  |  |  |  |
Default fund contributions |  |  | 105,000,000 |  |
Nasdaq clearing members cash contributions |  |  |  |  |
Clearing Operations [Line Items] |  |  |  |  |
Default fund contributions |  |  | 736,000,000 |  |
Default fund contributions and margin deposits |  |  | 6,570,000,000 |  | $ 5,911,000,000
Restricted cash and equivalents |  |  |  |  |
Clearing Operations [Line Items] |  |  |  |  |
Currency translation adjustment |  |  | 160,000,000 |  |
Investments |  |  |  |  |
Clearing Operations [Line Items] |  |  |  |  |
Currency translation adjustment |  |  | $ 37,000,000 |  |
Minimum |  |  |  |  |
Clearing Operations [Line Items] |  |  |  |  |
Reverse purchase agreements, maturity range |  |  | 1 day |  |
Maximum |  |  |  |  |
Clearing Operations [Line Items] |  |  |  |  |
Reverse purchase agreements, maturity range |  |  | 20 days |  |
Nasdaq Clearing |  |  |  |  |
Clearing Operations [Line Items] |  |  |  |  |
Regulatory | $ 33,000,000 | kr 300 |  |  |
Committed capital |  |  | $ 132,000,000 |  |
Power of assessment of the clearing member's contribution to the financial markets and commodities markets default funds (as a percent) |  |  | 230.00% |  |
Contract value of resale and repurchase agreements |  |  | $ 1,000,000,000 |  |
Total number of derivative contracts cleared (in contracts) | contract |  |  | 1,317,510 |  |

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