Financial Instruments and Risk Management (Narrative) (Details) € in Millions, ¥ in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)	May 09, 2024 EUR (€)	Mar. 31, 2024 EUR (€)	Mar. 31, 2024 JPY (¥)	Dec. 31, 2023 USD ($)	Dec. 31, 2023 EUR (€)	Dec. 31, 2023 JPY (¥)	Oct. 31, 2023 EUR (€)
Derivative [Line Items]
Pre-tax net losses on cash flow hedges to be reclassified from AOCE into earnings in next twelve months | $	$ 3.0
Contingent consideration (1) | $	569.9				$ 215.1
Interest rate swaps | Subsequent Event
Derivative [Line Items]
Derivative, Notional Amount		€ 500.0
Respiratory delivery platform
Derivative [Line Items]
Contingent consideration (1) | $	173.2				177.6
Biocon Biologics
Derivative [Line Items]
Contingent consideration (1) | $	30.0				15.8
Idorsia Pharmaceuticals Ltd.
Derivative [Line Items]
Contingent consideration (1) | $	345.0
Net Investment Hedging
Derivative [Line Items]
Notional amount of derivative			€ 5,600.0	¥ 40,000		€ 5,600.0	¥ 40,000
Long-term debt			5,600.0	40,000
Other Current Liabilities [Member]
Derivative [Line Items]
Contingent consideration (1) | $	105.2				76.1
2024 Euro Senior Notes | Net Investment Hedging
Derivative [Line Items]
Notional amount of derivative			1,000.0			1,000.0
Long-term debt			1,000.0
2028 Euro Senior Notes | Net Investment Hedging
Derivative [Line Items]
Notional amount of derivative			750.0			750.0
Long-term debt			750.0
2020 Euro Senior Notes
Derivative [Line Items]
Long-term debt | $	$ 264.3				$ 283.6
2.125% Euro Senior Notes due 2025 | Net Investment Hedging
Derivative [Line Items]
Notional amount of derivative			500.0			500.0
Long-term debt			500.0
2024 Euro Senior Notes, 1.023% | Net Investment Hedging
Derivative [Line Items]
Notional amount of derivative			750.0			750.0
Long-term debt			750.0
2027 Euro Senior Notes | Net Investment Hedging
Derivative [Line Items]
Notional amount of derivative			850.0			850.0
Long-term debt			850.0
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 Floating Rate Euro Notes | Net Investment Hedging
Derivative [Line Items]
Notional amount of derivative			500.0			€ 500.0
Long-term debt			€ 500.0
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
Measurement Input, Discount Rate | Contingent consideration | Minimum
Derivative [Line Items]
Business Combination, Contingent Consideration, Liability, Measurement Input	0.085		0.085	0.085	0.064	0.064	0.064
Measurement Input, Discount Rate | Contingent consideration | Maximum
Derivative [Line Items]
Business Combination, Contingent Consideration, Liability, Measurement Input					0.080	0.080	0.080