Income Taxes (Reconciliation of Federal to Effective Taxes) (Schedule) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Tax Disclosure [Abstract]
Computed “expected” tax benefit (expense)	$ (193.0)	$ (474.3)	$ 54.5	$ (1,139.8)
Change in valuation allowances	(39.5)	11.8	(200.8)	47.4
Non-deductible or non-taxable interest and other expenses	(33.3)	(19.6)	(108.0)	(85.8)
Non-deductible or non-taxable foreign currency exchange results	197.5	334.7	82.9	729.7
Tax benefit associated with technology innovation	5.9	5.1	12.1	16.4
International rate differences	(6.8)	(33.9)	(11.0)	(150.3)
Basis and other differences in the treatment of items associated with investments in subsidiaries and affiliates	78.8	103.7	(1.7)	364.1
Other, net	(7.9)	7.7	2.0	8.7
Total income tax benefit (expense)	$ 1.7	$ (64.8)	$ (170.0)	$ (209.6)