Income Taxes (Reconciliation of Federal to Effective Taxes) (Schedule) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Income Tax Disclosure [Abstract]
Computed “expected” tax benefit (expense)	$ (138.5)	$ 164.7
Non-deductible or non-taxable foreign currency exchange results	164.2	(88.2)
Non-deductible or non-taxable interest and other expenses	(27.1)	(26.1)
Change in valuation allowances	(20.9)	19.7
International rate differences	(6.2)	(4.4)
Basis and other differences in the treatment of items associated with investments in subsidiaries and affiliates	(3.6)	(76.6)
Other, net	5.2	(1.6)
Total income tax expense	$ (26.9)	$ (12.5)