Comprehensive Earnings (Components of Other Comprehensive Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized loss on marketable securities, net of tax	$ (2.7)		$ (2.7)		$ (2.1)	$ 0.0
Net unrecognized losses and prior service cost related to defined benefit plans, net of tax	(29.2)		(29.2)		30.1	(32.2)
Foreign currency translation adjustment	(4,584.5)		(4,584.5)		(3,421.5)	(1,802.4)
Accumulated other comprehensive loss	(3,759.1)		(3,759.1)		(2,899.2)	(1,744.3)
Net unrealized loss on marketable securities	(0.8)	$ (0.1)	(3.5)	$ (0.8)
Sales Revenue, Goods, Net	4,067.4	4,520.5	12,351.0	13,482.3
Interest expense	153.2	151.9	445.3	488.0
Other comprehensive loss, before tax	(772.6)	(226.5)	(1,793.0)	(548.7)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	1.2	(0.8)	3.3	(74.1)
Income tax provision (benefit)	73.2	(111.6)	276.9	544.8
Cash Flow Hedging
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrecognized gain (loss) on derivatives	15.7		33.5
Net Investment Hedging
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrecognized gain on derivatives in net investment hedging relationships, net of tax	764.4		764.4		471.6	16.7
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss		(1,471.9)		(1,471.9)			$ (1,205.0)	$ (858.0)
Other comprehensive earnings (loss) before reclassifications, before tax	(741.7)	(217.7)	(1,722.2)	(532.8)
Income tax provision (benefit)		40.4		65.2
Gains and Losses on Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrecognized gain on derivatives in cash flow hedging relationships, net of tax		2.7		2.7			(6.2)	(18.0)
Other comprehensive earnings (loss) before reclassifications, before tax		20.9		44.2
Income tax provision (benefit)		2.9		6.8
Gains and Losses on Derivatives | Cash Flow Hedging
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrecognized gain on derivatives in cash flow hedging relationships, net of tax					$ 22.7
Other comprehensive earnings (loss) before reclassifications, before tax	46.7		104.6
Income tax provision (benefit)	3.9		8.2
Net unrecognized gain on derivatives in cash flow hedging relationships, net of tax	34.5		34.5			$ 9.2
Gains and Losses on Derivatives | Net Investment Hedging
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrecognized gain on derivatives in cash flow hedging relationships, net of tax		(90.4)		(90.4)			(220.8)	(353.6)
Other comprehensive earnings (loss) before reclassifications, before tax		168.4		318.4
Income tax provision (benefit)	83.9	38.0	214.7	55.2
Gains and Losses on Marketable Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized loss on marketable securities, net of tax		0.3		0.3			0.4	1.2
Other comprehensive earnings (loss) before reclassifications, before tax		(0.1)		(0.8)
Income tax provision (benefit)		0.0		0.1
Defined Benefit Plan Items
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrecognized losses and prior service cost related to defined benefit plans, net of tax		44.9		44.9			43.6	(26.1)
Other comprehensive earnings (loss) before reclassifications, before tax	(1.3)	0.5	(3.6)	73.3
Income tax provision (benefit)		0.5		(3.1)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustment		(1,429.4)		(1,429.4)			$ (1,022.0)	$ (461.5)
Other comprehensive earnings (loss) before reclassifications, before tax	(1,163.0)		(2,782.1)
Income tax provision (benefit)		0.0		0.0
Reclassification out of Accumulated Other Comprehensive Income [Member] | AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amortization of prior service costs	0.1	(0.1)	0.2	(0.4)
Amortization of actuarial loss included in SG&A		0.4	0.1	1.2
Income tax provision (benefit)	87.3		221.8
Reclassification out of Accumulated Other Comprehensive Income [Member] | Gains and Losses on Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrecognized gain (loss) on derivatives		11.8		27.5
Reclassification out of Accumulated Other Comprehensive Income [Member] | Gains and Losses on Marketable Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income tax provision (benefit)	(0.2)		(0.8)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Plan Items
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amortization of prior service costs		0.1		0.4
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax		(0.8)		(74.1)
Income tax provision (benefit)	(0.3)		(0.3)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive loss, before tax		(407.4)		(967.9)
Income tax provision (benefit)	0.0		0.0
Mylan N.V. | Net Investment Hedging
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrecognized gain (loss) on derivatives	376.7	168.4	962.4	318.4
Foreign currency forward contracts | Gains and Losses on Derivatives | Cash Flow Hedging
Accumulated Other Comprehensive Income (Loss) [Line Items]
Sales Revenue, Goods, Net	(32.2)		(74.5)
Foreign currency forward contracts | Reclassification out of Accumulated Other Comprehensive Income [Member] | AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Sales Revenue, Goods, Net	(32.2)	(10.2)	(74.5)	(19.9)
Foreign currency forward contracts | Reclassification out of Accumulated Other Comprehensive Income [Member] | Gains and Losses on Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Sales Revenue, Goods, Net	(32.2)	(10.2)	(74.5)	(19.9)
Interest rate swaps | Gains and Losses on Derivatives | Cash Flow Hedging
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest expense	1.2		3.4
Interest rate swaps | Reclassification out of Accumulated Other Comprehensive Income [Member] | AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest expense	1.2	1.1	3.4	3.2
Interest rate swaps | Reclassification out of Accumulated Other Comprehensive Income [Member] | Gains and Losses on Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest expense	1.2	1.1	3.4	3.2
Pension and other postretirement benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amortization of prior service costs	0.1	(0.1)	0.2	(0.4)
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	0.0	$ 0.4	0.1	$ 1.2
Pension and other postretirement benefits | Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Plan Items
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amortization of prior service costs	$ 0.1		$ 0.2