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Intangible Assets, net (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2013 | Mar. 31, 2012 | Dec. 31, 2012
Intangible assets subject to amortization: |  |  |
Intangible assets subject to amortization, Gross Carrying Amount | $ 575.7 |  | $ 577.7
Intangible assets subject to amortization, Accumulated Amortization | (199.5) |  | (188.6)
Intangible assets |  |  |
Intangible assets, Gross Carrying Amount | 1,121.8 |  | 1,125.1
Amortization expense for intangible assets | 11.3 | 10.2 |
Changes in intangible assets due to foreign currency translation losses | 2.9 |  |
Summary of estimated aggregate amortization expense for the remaining nine months of 2013 and each of the next five years |  |  |
2013 | 33.7 |  |
2014 | 42.9 |  |
2015 | 41.4 |  |
2016 | 39.6 |  |
2017 | 34.2 |  |
2018 | 29.9 |  |
Covenants not to compete |  |  |
Intangible assets subject to amortization: |  |  |
Intangible assets subject to amortization, Gross Carrying Amount | 8.0 |  | 8.0
Intangible assets subject to amortization, Accumulated Amortization | (7.2) |  | (7.1)
Loan fees |  |  |
Intangible assets subject to amortization: |  |  |
Intangible assets subject to amortization, Gross Carrying Amount | 31.2 |  | 31.2
Intangible assets subject to amortization, Accumulated Amortization | (20.8) |  | (20.2)
Customer lists/relationships |  |  |
Intangible assets subject to amortization: |  |  |
Intangible assets subject to amortization, Gross Carrying Amount | 522.0 |  | 524.0
Intangible assets subject to amortization, Accumulated Amortization | (163.2) |  | (153.3)
Software - internal use |  |  |
Intangible assets subject to amortization: |  |  |
Intangible assets subject to amortization, Gross Carrying Amount | 8.1 |  | 8.1
Intangible assets subject to amortization, Accumulated Amortization | (5.7) |  | (5.5)
Other |  |  |
Intangible assets subject to amortization: |  |  |
Intangible assets subject to amortization, Gross Carrying Amount | 6.4 |  | 6.4
Intangible assets subject to amortization, Accumulated Amortization | (2.6) |  | (2.5)
Trade names |  |  |
Intangible assets not subject to amortization: |  |  |
Intangible assets not subject to amortization, Gross Carrying Amount | $ 546.1 |  | $ 547.4

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