Income Taxes (Reconciliation of Federal to Effective Taxes) (Schedule) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Computed “expected” tax benefit (expense)	$ 219.6	$ (30.7)	$ 406.4
Non-deductible or non-taxable interest and other expenses	(191.7)	(153.8)	(42.8)
Basis and other differences in the treatment of items associated with investments in subsidiaries and affiliates	(167.9)	(360.1)	(192.6)
Change in valuation allowances	(113.6)	(34.9)	(341.6)
Non-deductible or non-taxable foreign currency exchange results	(26.5)	132.5	(233.8)
Enacted tax law and rate changes	19.2	(13.5)	7.4
International rate differences	8.5	(3.5)	126.9
Recognition of previously unrecognized tax benefits	5.9	49.6	4.9
Mandatory Repatriation Tax	0.0	(1,137.2)	0.0
Tax benefit associated with technologies innovation	0.0	0.0	12.1
Other, net	(6.5)	(21.7)	14.2
Total income tax expense	$ (253.0)	$ (1,573.3)	$ (238.9)