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Recent Accounting Pronouncements (Tables) | 9 Months Ended
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Sep. 30, 2018
Accounting Changes and Error Corrections [Abstract] |
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] |
| Nine Months Ended September 30, 2017
(in millions) | As Previously Reported |  | Adoption of ASU 2016-18 |  | As Adjusted
Net cash provided by operating activities | $ | 164.2 |  |  | $ | 3.0 |  |  | $ | 167.2 |
Cash, cash equivalents and restricted cash, beginning of period | $ | 48.7 |  |  | $ | 34.3 |  |  | $ | 83.0 |
Net increase in cash, cash equivalents and restricted cash | 7.9 |  |  | 3.0 |  |  | 10.9 |
Effect of exchange rate changes on cash | 1.2 |  |  | — |  |  | 1.2 |
Cash, cash equivalents and restricted cash, end of period | $ | 57.8 |  |  | $ | 37.3 |  |  | $ | 95.1 |
(in millions) | As Reported at December 31, 2017 |  | Adoption of ASC 606 |  | Balance at January 1, 2018
ASSETS |  |  |  |  |
Accounts receivable, net | $ | 49.6 |  |  | $ | (21.8 | ) |  | $ | 27.8 |
Income taxes receivable | 35.6 |  |  | (4.1 | ) |  | 31.5 |
Current assets of discontinued operations held for sale | 69.1 |  |  | 0.7 |  |  | 69.8 |
Other assets | 13.6 |  |  | (1.1 | ) |  | 12.5 |
LIABILITIES |  |  |  |  |
Accrued expense | 75.8 |  |  | 0.8 |  |  | 76.6 |
Current deferred revenue | 70.9 |  |  | (18.9 | ) |  | 52.0 |
Current liabilities of discontinued operations held for sale | 188.2 |  |  | (38.8 | ) |  | 149.4 |
Non-current deferred revenue | 29.3 |  |  | (4.5 | ) |  | 24.8 |
Deferred income taxes | 40.6 |  |  | (0.1 | ) |  | 40.5 |
Non-current liabilities of discontinued operations held for sale | 54.8 |  |  | 5.5 |  |  | 60.3 |
SHAREHOLDERS' EQUITY |  |  |  |  |
Retained earnings | 634.3 |  |  | 29.7 |  |  | 664.0 |
| At September 30, 2018
(in millions) | As Reported |  | Balances without Adoption of ASC 606 |  | Effect of Change Increase/(Decrease)
ASSETS |  |  |  |  |
Accounts receivable, net | $ | 33.8 |  |  | $ | 37.0 |  |  | $ | (3.2 | )
Other assets | 17.5 |  |  | 18.0 |  |  | (0.5 | )
LIABILITIES |  |  |  |  |
Accrued expense | 83.0 |  |  | 82.1 |  |  | 0.9 |
Income taxes payable | 0.5 |  |  | 0.3 |  |  | 0.2 |
Current deferred revenue | 12.8 |  |  | 16.7 |  |  | (3.9 | )
Non-current deferred revenue | 21.1 |  |  | 22.4 |  |  | (1.3 | )
Deferred income taxes | 66.4 |  |  | 66.2 |  |  | 0.2 |
SHAREHOLDERS' EQUITY |  |  |  |  |
Retained earnings | 504.1 |  |  | 503.9 |  |  | 0.2 |

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