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Long-Lived Assets Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Millions | Jun. 30, 2020 | Dec. 31, 2019
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Finite-Lived Intangible Assets [Line Items] |  |
Gross | $ 1,734.6 | $ 1,697.8
Accumulated amortization | (1,175.3) | (1,146.9)
Intangible assets | 559.3 | 550.9
Permits and leasehold agreements |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross | 1,185.4 | 1,153.3
Accumulated amortization | (755.7) | (735.7)
Intangible assets | 429.7 | 417.6
Franchise agreements |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross | 503.6 | 497.4
Accumulated amortization | (379.2) | (371.1)
Intangible assets | 124.4 | 126.3
Other intangible assets |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross | 45.6 | 47.1
Accumulated amortization | (40.4) | (40.1)
Intangible assets | $ 5.2 | $ 7.0

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