Income Taxes (Reconciliation of Federal to Effective Taxes) (Schedule) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Computed “expected” tax benefit (expense)	$ (270.6)	$ (2,660.2)	$ 342.2
Non-deductible or non-taxable foreign exchange results	267.3	218.0	(395.1)
International rate differences	(147.1)	(92.4)	6.7
Non-deductible or non-taxable interest and other expenses	(89.6)	(69.0)	(25.1)
Basis and other differences in the treatment of items associated with investments in subsidiaries and affiliates	(68.4)	84.0	(245.8)
Change in valuation allowances	(39.0)	(62.2)	(8.4)
Tax benefit associated with technology innovation	22.1	25.8	62.2
Enacted tax law and rate changes	3.4	2.2	248.2
Non-taxable gain on U.K. JV transaction	0.0	2,066.0	0.0
Recognition of previously unrecognized tax benefits	0.0	20.5	285.8
Other, net	3.0	(6.0)	5.2
Income tax benefit (expense)	$ (318.9)	$ (473.3)	$ 275.9