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Guarantees and Contingencies - Additional Information (Details) - USD ($) $ in Millions |  | 3 Months Ended
--- | --- | ---
Jul. 11, 2018 | Sep. 30, 2018
GXS Group, Inc. |  |
Loss Contingencies [Line Items] |  |
Loss contingency accrual |  | $ 1.4
GXS India |  |
Loss Contingencies [Line Items] |  |
Loss contingency accrual |  | 1.2
Internal Revenue Service (IRS) |  |
Loss Contingencies [Line Items] |  |
Estimated amount of loss resulting from an adverse tax position |  | 735.0
Income tax examination, tax |  | 455.0
Income tax examination, penalties |  | 105.0
Income tax examination, interest |  | 175.0
Internal Revenue Service (IRS) | Tax Year 2010 |  |
Loss Contingencies [Line Items] |  |
Estimated amount of loss resulting from an adverse tax position | $ 335.0 |
Additional tax expense, as a percent | 20.00% |
Internal Revenue Service (IRS) | Tax Year 2012 |  |
Loss Contingencies [Line Items] |  |
Income tax examination, change in liability | $ 80.0 |
Additional tax expense, as a percent | 40.00% |
Canada Revenue Agency (CRA) |  |
Loss Contingencies [Line Items] |  |
Estimated amount of loss resulting from an adverse tax position |  | $ 23.0
Canada Revenue Agency (CRA) | Tax Year 2012 |  |
Loss Contingencies [Line Items] |  |
Additional tax expense, as a percent |  | 10.00%
Income tax examination, estimate of increase to taxable income |  | $ 90.0
Canada Revenue Agency (CRA) | Tax Year 2013 |  |
Loss Contingencies [Line Items] |  |
Additional tax expense, as a percent |  | 10.00%
Income tax examination, estimate of increase to taxable income |  | $ 90.0

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