Intangible Assets - Schedule of Identifiable Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Definite-lived intangibles:
Customer relationships	$ 2,017.0	$ 376.6
Trade names	51.0	15.4
Non-compete agreements	18.7	9.8
Carrier relationships	12.1	12.1
Other intangible assets	2.2	2.2
Intangible assets, gross	2,101.0	416.1
Less: Accumulated amortization	(224.5)	(74.6)
Total Identifiable Intangible Assets, net	$ 1,876.5	$ 341.5