Income Taxes (Table 2) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Computed “expected” tax benefit	$ (109.9)	$ 136.9	$ 221.7
Change in valuation allowances:
Benefit	1,149.1	6.8	11.9
Expense	(260.4)	(508.3)	(373.1)
Recognition of previously unrecognized tax benefits	212.5	44.4	29.5
Non-deductible or non-taxable foreign currency exchange results:
Benefit	228.0	53.2	71.9
Expense	(34.3)	(5.1)	(16.3)
Tax effect of intercompany financing	173.7	154.9	166.9
Non-deductible or non-taxable interest and other expenses:
Expense	(234.9)	(106.6)	(236.5)
Benefit	63.8	48.1	58.0
Enacted tax law and rate changes	(162.2)	(280.5)	23.9
International rate differences:
Benefit	138.1	200.8	266.4
Expense	(43.0)	(52.7)	(27.6)
Basis and other differences in the treatment of items associated with investments in subsidiaries and affiliates (b):
Benefit	173.6	3.3	32.6
Expense	(110.8)	(96.9)	(168.0)
Other, net	34.6	36.8	13.7
Total income tax benefit (expense)	$ 1,217.9	$ (364.9)	$ 75.0