Other Comprehensive Income (Loss) - Tax Effect (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Benefit (expense) for income taxes allocated to other comprehensive income (loss) items	$ 122.3	$ (115.3)	$ 36.1	$ (99.1)
Foreign currency translation gains/losses
Accumulated Other Comprehensive Income (Loss) [Line Items]
Benefit (expense) for income taxes allocated to other comprehensive income (loss) items	121.9	(90.3)	53.7	(50.2)
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	(5.0)	3.5	(3.0)	2.5
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	(1.0)	(6.9)	(1.5)	(13.9)
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	$ 6.4	$ (21.6)	$ (13.1)	$ (37.5)