Other Comprehensive Income (Loss) - Schedule of Tax Effects (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Benefit (expense) for income taxes related to other comprehensive income (loss)	$ (294.7)	$ 196.3	$ (250.0)
Foreign currency translation gains/losses
Accumulated Other Comprehensive Income (Loss) [Line Items]
Benefit (expense) for income taxes related to other comprehensive income (loss)	(146.4)	81.0	(75.9)
Net unrealized gains/losses on available-for-sale securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Benefit (expense) for income taxes related to other comprehensive income (loss)	1.6	(3.2)	12.4
Retirement benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Benefit (expense) for income taxes related to other comprehensive income (loss)	(133.2)	141.5	(95.6)
Net unrealized gains/losses on cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Benefit (expense) for income taxes related to other comprehensive income (loss)	$ (16.7)	$ (23.0)	$ (90.9)