Segment Reporting (Reconciliation of Operating Cash Flow to Earnings from Continuing Operations) (Schedule) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment Reporting, Measurement Disclosures [Abstract]
Total segment Adjusted OIBDA from continuing operations	$ 1,898.9	$ 1,600.6
Share-based compensation expense	(45.8)	(33.4)
Depreciation and amortization	(1,296.4)	(1,128.3)
Impairment, restructuring and other operating items, net	(63.6)	(11.8)
Operating income	493.1	427.1
Interest expense	(487.8)	(453.2)
Realized and unrealized losses on derivative instruments, net	(300.3)	(241.8)
Foreign currency transaction gains (losses), net	(30.5)	64.4
Realized and unrealized gains (losses) due to changes in fair values of certain investments and debt, net	(57.2)	94.4
Losses on debt modification and extinguishment, net	(2.6)	(45.3)
Share of losses of affiliates, net	(36.5)	(15.7)
Other income, net	9.3	16.0
Loss from continuing operations before income taxes	$ (412.5)	$ (154.1)