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Description of the Business and Summary of Significant Accounting Policies - New Accounting Guidance (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Jan. 01, 2018 | Dec. 31, 2014
Segment Reporting Information [Line Items] |  |  |  |  |  |
Offset of valuation allowance |  | $ 158.8 | $ 119.0 |  |  |
Change in net cash used in investing activities |  | (414.6) | (228.0) | $ (269.7) |  |
Cost of services | [1] | 417.2 | 396.5 | 372.7 |  |
Inventory carrying value |  | 243.1 | 242.3 |  |  |
Retained earnings |  | (2,461.0) | (2,218.7) |  |  |
Net increase to opening accumulated loss |  | (199.7) | (333.6) | (222.2) |  | $ (94.4)
Other components of net benefit costs |  | (0.3) | (1.4) | (0.5) |  |
WAP Jackpot Payments | Gaming |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Cost of services |  | 23.2 | 29.8 | 38.1 |  |
Accounting Standards Update 2016-09 |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Unrecognized tax benefit |  |  | 10.1 |  |  |
Offset of valuation allowance |  |  | 10.1 |  |  |
Accounting Standards Update 2016-18 |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Cash, cash equivalents and restricted cash |  |  | 41.8 | 38.1 |  | $ 44.0
Change in net cash used in investing activities |  |  | $ (3.7) | $ 5.9 |  |
Accounting Standards Update 2015-14 | Lottery | Scenario, Forecast |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Net increase to opening accumulated loss |  |  |  |  | $ (10.0) |
Accounting Standards Update 2015-14 | Instant Products Under POS Arrangements | Lottery |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Inventory sales |  | 52.0 |  |  |  |
Inventory carrying value |  | 33.0 |  |  |  |
Retained earnings |  | 52.0 |  |  |  |
Accounting Standards Update 2015-14 | Other Instant Product And Lottery Systems Arrangements | Lottery |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |
Inventory sales |  | $ 10.0 |  |  |  |
[1] | Exclusive of D&A.

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