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Commitments and Contingencies (Details) AUD in Millions, $ in Millions |  | 1 Months Ended | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Feb. 19, 2016 AUD | Apr. 30, 2013 AUD investment | Mar. 31, 2016 USD ($) | Jan. 28, 2016 employee | Aug. 31, 2015 employee shareholder | Jun. 30, 2012
Shareholder Derivative Action |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Number of shareholders commencing punitive derivative action | shareholder |  |  |  |  | 2 |
City of Swan |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Number of synthetic collateralized debt obligations | investment |  | 8 |  |  |  |
Damages sought |  | AUD 327 |  |  |  |
Settlement amount payable | AUD 144 |  |  |  |  |
CME Group | S&P DJ Indices |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Revenues earned under license agreement | $ |  |  | $ 22 |  |  |
Noncontrolling interest ownership by noncontrolling owners |  |  |  |  |  | 27.00%
S&P Ratings | Shareholder Derivative Action |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Number of former employees named as defendants | employee |  |  |  | 9 | 3 |

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