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ACQUISITIONS AND INVESTMENTS - Additional Information (Details) AUD / shares in Units, AUD in Millions | Feb. 24, 2016 USD ($) | Feb. 24, 2016 AUD | Sep. 30, 2017 USD ($) | Aug. 10, 2017 | Dec. 31, 2016 USD ($) | Aug. 23, 2016 | Feb. 24, 2016 AUD AUD / shares
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Business Acquisition [Line Items] |  |  |  |  |  |  |
Debt, long term |  |  | $ 2,717,800,000 |  | $ 2,685,400,000 |  |
Term Loan, due Nov 2018 |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Debt, long term |  |  | $ 400,000,000 |  | $ 450,000,000 |  |
ID Watchdog, Inc. |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Business acquisition, percentage of voting interests acquired |  |  |  | 100.00% |  |  |
Veda |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Business acquisition, percentage of voting interests acquired | 100.00% |  |  |  |  |  | 100.00%
Business combination, consideration transferred | $ 1,700,000,000 | AUD 2,400.0 |  |  |  |  |
Business combination, separately recognized transactions, liabilities recognized | 189,500,000 |  |  |  |  |  | AUD 261.9
Business acquisition, share price (in Australian dollars per share) | AUD / shares |  |  |  |  |  |  | AUD 2.825
Debt, long term | 1,700,000,000 |  |  |  |  |  |
Veda | 364-Day Revolver |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Business combination, debt instrument, face amount | $ 800,000,000 |  |  |  |  |  |
Bridge loan, term | 364 days | 364 days |  |  |  |  |
Veda | Term Loan, due Nov 2018 |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Business combination, debt instrument, face amount | $ 800,000,000 |  |  |  |  |  |
Debt instrument, term | 3 years | 3 years |  |  |  |  |
Barnett and Computersoft |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Business acquisition, percentage of voting interests acquired |  |  |  |  |  | 100.00% |

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