Financial Instruments and Risk Management (Narrative) (Details) € in Millions, ¥ in Millions, ¥ in Millions, $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Aug. 07, 2025 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 EUR (€)	Jun. 30, 2025 JPY (¥)	Apr. 30, 2025 USD ($)	Apr. 30, 2025 CNY (¥)	Dec. 31, 2024 USD ($)	Dec. 31, 2024 EUR (€)	Dec. 31, 2024 JPY (¥)	Jun. 30, 2024 EUR (€)	Mar. 15, 2024 USD ($)
Derivative [Line Items]
Pre-tax net losses on cash flow hedges to be reclassified from AOCE into earnings in next twelve months | $				$ (32.0)
Contingent consideration | $		$ 367.2		367.2						$ 556.1
Subsequent Event
Derivative [Line Items]
Proceeds from Derivative Instrument, Investing Activities | $	$ 3.4
Biocon Biologics
Derivative [Line Items]
Gain on equity securities | $		(284.0)	$ (282.4)	(399.8)	$ (329.3)
Interest rate swaps
Derivative [Line Items]
Derivative, notional amount						€ 500.0
Respiratory delivery platform
Derivative [Line Items]
Contingent consideration | $		77.5		77.5						176.3
Idorsia Pharmaceuticals Ltd.
Derivative [Line Items]
Contingent consideration | $		288.0		$ 288.0						378.0				$ 345.0
Net Investment Hedging
Derivative [Line Items]
Notional amount of derivative						2,850.0	¥ 40,000				€ 2,850.0	¥ 40,000
Long-term debt						2,850.0	40,000
Maximum
Derivative [Line Items]
Derivative, term of contract				18 months
2027 Euro Senior Notes | Net Investment Hedging
Derivative [Line Items]
Notional amount of derivative						850.0					850.0
Long-term debt						850.0
2028 Euro Senior Notes | Net Investment Hedging
Derivative [Line Items]
Notional amount of derivative						750.0					750.0
Long-term debt						750.0
2032 Euro Senior Notes | Net Investment Hedging
Derivative [Line Items]
Notional amount of derivative						1,250.0					1,250.0
Long-term debt						€ 1,250.0
YEN Term Loan | Net Investment Hedging
Derivative [Line Items]
Notional amount of derivative | ¥							40,000					¥ 40,000
Long-term debt | ¥							40,000
2020 Euro Senior Notes
Derivative [Line Items]
Long-term debt | $		$ 277.7		$ 277.7						$ 254.4
Interest rate swaps | Net Investment Hedging
Derivative [Line Items]
Derivative, notional amount | ¥							¥ 14,600
Currency Swap | Net Investment Hedging
Derivative [Line Items]
Derivative, notional amount											€ 500.0		€ 600.0
Currency Swap December 2026 | Net Investment Hedging
Derivative [Line Items]
Derivative, notional amount								$ 200.0	¥ 1,420
Currency Swap December 2027 | Net Investment Hedging
Derivative [Line Items]
Derivative, notional amount								$ 100.0	¥ 695
Measurement Input, Discount Rate | Contingent consideration | Minimum
Derivative [Line Items]
Business Combination, Contingent Consideration, Liability, Measurement Input		0.085		0.085		0.085	0.085			0.090	0.090	0.090
Measurement Input, Discount Rate | Contingent consideration | Maximum
Derivative [Line Items]
Business Combination, Contingent Consideration, Liability, Measurement Input		0.180		0.180		0.180	0.180			0.190	0.190	0.190