Other Comprehensive Income (Loss) (Tax Effect) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Benefit (expense) for income taxes allocated to other comprehensive income (loss) items	$ (65.3)	$ (170.3)
Foreign Currency Translation Gains (Losses)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Benefit (expense) for income taxes allocated to other comprehensive income (loss) items	(13.7)	(75.3)
Unrealized net gains/losses on securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Benefit (expense) for income taxes allocated to other comprehensive income (loss) items	6.7	4.4
Defined Benefit Pension and Retiree Health Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Benefit (expense) for income taxes allocated to other comprehensive income (loss) items	(28.4)	(31.3)
Effective portion of cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Benefit (expense) for income taxes allocated to other comprehensive income (loss) items	$ (29.9)	$ (68.1)