Other Comprehensive Income (Loss) (Tax Effect) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Benefit (expense) for income taxes allocated to other comprehensive income (loss) items	$ (19.8)	$ (140.6)	$ 16.2	$ (205.9)
Foreign Currency Translation Gains (Losses)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Benefit (expense) for income taxes allocated to other comprehensive income (loss) items	(6.4)	(87.2)	40.1	(100.9)
Net unrealized gains/losses on available-for-sale securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Benefit (expense) for income taxes allocated to other comprehensive income (loss) items	1.6	3.0	(1.0)	9.7
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	(3.0)	(22.4)	(7.0)	(50.8)
Net unrealized gains/losses on cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Benefit (expense) for income taxes allocated to other comprehensive income (loss) items	$ (12.0)	$ (34.0)	$ (15.9)	$ (63.9)