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Accounting Policies (Details) $ in Millions |  |  |  |  | 3 Months Ended | 12 Months Ended | 24 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 30, 2016 USD ($) | Nov. 02, 2016 USD ($) | Feb. 26, 2016 USD ($) | Nov. 30, 2015 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2016 USD ($) item | Dec. 31, 2015 USD ($) | Dec. 31, 2016 USD ($) | Oct. 30, 2016 USD ($) | Apr. 03, 2016 | Sep. 15, 2015 USD ($)
Goodwill |  |  |  |  |  |  |  |  |  |  |
Number of reporting units | item |  |  |  |  |  | 8 |  |  |  |  |
Gross Balance |  |  |  |  |  |  |  |  |  |  |
Balance at the beginning of the period |  |  |  |  |  | $ 656.1 | $ 676.4 | $ 676.4 |  |  |
Acquired During the Period |  |  |  |  |  | 47.0 | 12.9 |  |  |  |
Foreign Currency Translation and Other |  |  |  |  |  | (3.3) | (33.2) |  |  |  |
Balance at the end of the period |  |  |  |  | $ 699.8 | 699.8 | 656.1 | 699.8 |  |  |
Accumulated Impairment Losses |  |  |  |  |  |  |  |  |  |  |
Balance at the beginning of the period |  |  |  |  |  | (167.1) | (37.4) | (37.4) |  |  |
Impairment Loss During the Period |  |  |  |  |  |  | (129.7) |  |  |  |
Balance at the end of the period |  |  |  |  | (167.1) | (167.1) | (167.1) | (167.1) |  |  |
Goodwill |  |  |  |  | 532.7 | 532.7 | 489.0 | 532.7 | $ 493.4 |  |
Business combination |  |  |  |  |  |  |  |  |  |  |
Net Goodwill |  |  |  |  | 532.7 | 532.7 | 489.0 | 532.7 | $ 493.4 |  |
Water quality |  |  |  |  |  |  |  |  |  |  |
Accumulated Impairment Losses |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  | 0.0 | 0.0 |  | 0.0 |  |  |
Business combination |  |  |  |  |  |  |  |  |  |  |
Net Goodwill |  |  |  |  | $ 0.0 | 0.0 |  | 0.0 |  |  |
Americas |  |  |  |  |  |  |  |  |  |  |
Gross Balance |  |  |  |  |  |  |  |  |  |  |
Balance at the beginning of the period |  |  |  |  |  | 391.2 | 398.0 | 398.0 |  |  |
Foreign Currency Translation and Other |  |  |  |  |  |  | (6.8) |  |  |  |
Balance at the end of the period |  |  |  |  |  |  | 391.2 |  |  |  |
Accumulated Impairment Losses |  |  |  |  |  |  |  |  |  |  |
Balance at the beginning of the period |  |  |  |  |  | (24.5) | (24.5) | (24.5) |  |  |
Balance at the end of the period |  |  |  |  |  |  | (24.5) |  |  |  |
Goodwill |  |  |  |  |  |  | 366.7 |  |  |  |
Business combination |  |  |  |  |  |  |  |  |  |  |
Net Goodwill |  |  |  |  |  |  | 366.7 |  |  |  |
EMEA |  |  |  |  |  |  |  |  |  |  |
Gross Balance |  |  |  |  |  |  |  |  |  |  |
Balance at the beginning of the period |  |  |  |  |  | 238.6 | 265.5 | 265.5 |  |  |
Foreign Currency Translation and Other |  |  |  |  |  |  | (26.9) |  |  |  |
Balance at the end of the period |  |  |  |  |  |  | 238.6 |  |  |  |
Accumulated Impairment Losses |  |  |  |  |  |  |  |  |  |  |
Balance at the beginning of the period |  |  |  |  |  | (129.7) |  |  |  |  |
Impairment Loss During the Period |  |  |  |  |  |  | (129.7) |  |  |  |
Balance at the end of the period |  |  |  |  |  |  | (129.7) |  |  |  |
Goodwill |  |  |  |  |  |  | 108.9 |  |  |  |
Business combination |  |  |  |  |  |  |  |  |  |  |
Net Goodwill |  |  |  |  |  |  | 108.9 |  |  |  |
PVI Riverside Holdings, Inc Member |  |  |  |  |  |  |  |  |  |  |
Accumulated Impairment Losses |  |  |  |  |  |  |  |  |  |  |
Goodwill |  | $ 39.1 |  |  |  |  |  |  |  |  |
Business combination |  |  |  |  |  |  |  |  |  |  |
Aggregate consideration, net |  | $ 79.2 |  |  |  |  |  |  |  |  |
Outstanding shares acquired (as a percent) |  | 100.00% |  |  |  |  |  |  |  |  |
Net Goodwill |  | $ 39.1 |  |  |  |  |  |  |  |  |
Purchase price allocated to intangible assets |  | 31.0 |  |  |  |  |  |  |  |  |
PVI Riverside Holdings, Inc Member | Customer relationships |  |  |  |  |  |  |  |  |  |  |
Business combination |  |  |  |  |  |  |  |  |  |  |
Purchase price allocated to intangible assets |  | $ 17.6 |  |  |  |  |  |  |  |  |
Aerco Korea |  |  |  |  |  |  |  |  |  |  |
Accumulated Impairment Losses |  |  |  |  |  |  |  |  |  |  |
Goodwill | $ 3.7 |  | $ 3.3 |  |  |  |  |  |  |  |
Business combination |  |  |  |  |  |  |  |  |  |  |
Aggregate consideration, net | $ 0.8 |  | $ 4.0 |  |  |  |  |  |  |  |
Outstanding shares acquired (as a percent) | 10.00% |  | 50.00% |  |  |  |  |  |  |  |
Ownership interest acquired (as a percent) | 10.00% |  |  |  | 10.00% |  |  |  |  |  |
Percentage of ownership before transaction |  |  | 40.00% |  |  |  |  |  |  |  |
Net Goodwill | $ 3.7 |  | $ 3.3 |  |  |  |  |  |  |  |
Purchase price allocated to intangible assets | $ 1.6 |  |  |  |  |  |  |  |  |  |
Shares remaining to be acquired |  |  |  |  |  |  |  |  |  | 10.00% |
Aerco Korea | Customer relationships |  |  |  |  |  |  |  |  |  |  |
Business combination |  |  |  |  |  |  |  |  |  |  |
Purchase price allocated to intangible assets |  |  | $ 1.6 |  |  |  |  |  |  |  |
Apex |  |  |  |  |  |  |  |  |  |  |
Accumulated Impairment Losses |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  | $ 12.9 |  |  |  |  |  |  |
Business combination |  |  |  |  |  |  |  |  |  |  |
Aggregate consideration, net |  |  |  | $ 20.4 |  |  |  |  |  |  |
Outstanding shares acquired (as a percent) |  |  |  | 80.00% |  |  |  |  |  |  |
Net Goodwill |  |  |  | $ 12.9 |  |  |  |  |  |  |
Purchase price allocated to intangible assets |  |  |  | $ 10.1 |  |  |  |  |  |  |
Shares remaining to be acquired |  |  |  | 20.00% |  |  |  |  |  |  |
Number of years of closing |  |  |  | 3 years |  |  |  |  |  |  |
Americas |  |  |  |  |  |  |  |  |  |  |
Gross Balance |  |  |  |  |  |  |  |  |  |  |
Balance at the beginning of the period |  |  |  |  |  | 391.2 |  |  |  |  |
Acquired During the Period |  |  |  |  |  | 43.3 |  |  |  |  |
Foreign Currency Translation and Other |  |  |  |  |  | 0.2 |  |  |  |  |
Balance at the end of the period |  |  |  |  | $ 434.7 | 434.7 | 391.2 | 434.7 |  |  |
Accumulated Impairment Losses |  |  |  |  |  |  |  |  |  |  |
Balance at the beginning of the period |  |  |  |  |  | (24.5) |  |  |  |  |
Balance at the end of the period |  |  |  |  | (24.5) | (24.5) | (24.5) | (24.5) |  |  |
Goodwill |  |  |  |  | 410.2 | 410.2 |  | 410.2 |  |  |
Business combination |  |  |  |  |  |  |  |  |  |  |
Net Goodwill |  |  |  |  | 410.2 | 410.2 |  | 410.2 |  |  |
EMEA |  |  |  |  |  |  |  |  |  |  |
Gross Balance |  |  |  |  |  |  |  |  |  |  |
Balance at the beginning of the period |  |  |  |  |  | 238.6 |  |  |  |  |
Foreign Currency Translation and Other |  |  |  |  |  | (3.7) |  |  |  |  |
Balance at the end of the period |  |  |  |  | 234.9 | 234.9 | 238.6 | 234.9 |  |  |
Accumulated Impairment Losses |  |  |  |  |  |  |  |  |  |  |
Balance at the beginning of the period |  |  |  |  |  | (129.7) |  |  |  |  |
Balance at the end of the period |  |  |  |  | (129.7) | (129.7) | (129.7) | (129.7) |  |  |
Goodwill |  |  |  |  | 105.2 | 105.2 |  | 105.2 |  |  |
Business combination |  |  |  |  |  |  |  |  |  |  |
Net Goodwill |  |  |  |  | 105.2 | 105.2 |  | 105.2 |  |  |
Tax benefit on Impairment charge |  |  |  |  |  | 3.4 |  |  |  |  |
Net impairment charge |  |  |  |  |  |  |  | 126.3 |  |  |
Asia-Pacific |  |  |  |  |  |  |  |  |  |  |
Gross Balance |  |  |  |  |  |  |  |  |  |  |
Balance at the beginning of the period |  |  |  |  |  | 26.3 | 12.9 | 12.9 |  |  |
Acquired During the Period |  |  |  |  |  | 3.7 | 12.9 |  |  |  |
Foreign Currency Translation and Other |  |  |  |  |  | 0.2 | 0.5 |  |  |  |
Balance at the end of the period |  |  |  |  | 30.2 | 30.2 | 26.3 | 30.2 |  |  |
Accumulated Impairment Losses |  |  |  |  |  |  |  |  |  |  |
Balance at the beginning of the period |  |  |  |  |  | (12.9) | (12.9) | (12.9) |  |  |
Balance at the end of the period |  |  |  |  | (12.9) | (12.9) | (12.9) | (12.9) |  |  |
Goodwill |  |  |  |  | 17.3 | 17.3 | 13.4 | 17.3 |  |  |
Business combination |  |  |  |  |  |  |  |  |  |  |
Net Goodwill |  |  |  |  | $ 17.3 | $ 17.3 | $ 13.4 | $ 17.3 |  |  |
Certain Americas Product Lines | Sale of business |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  |  |  |  |  |  |  |
Goodwill of disposal group reclassified as assets held for sale |  |  |  |  |  |  |  |  |  |  | $ 4.1

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