Comprehensive Earnings (Components of Other Comprehensive Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized loss on marketable securities, net of tax	$ (2.1)		$ (2.1)		$ (1.3)	$ 0.0
Net unrecognized losses and prior service cost related to defined benefit plans, net of tax	(30.1)		(30.1)		29.4	(32.2)
Foreign currency translation adjustment	(3,421.5)		(3,421.5)		(2,271.6)	(1,802.4)
Accumulated other comprehensive loss	(2,899.2)		(2,899.2)		(2,061.0)	(1,744.3)
Net unrealized (loss) gain on marketable securities	(1.0)	$ 0.2	(2.7)	$ (0.7)
Sales Revenue, Goods, Net	4,105.4	4,561.7	8,283.6	8,961.8
Interest expense	145.9	167.1	292.1	336.1
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	0.1
Other comprehensive (loss) earnings, before tax	(748.4)	168.4	(1,020.4)	(322.2)
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax	(0.5)	(72.5)	2.1	(73.3)
Income tax (benefit) provision	75.4	60.1	203.7	656.4
Cash Flow Hedging
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrecognized gain (loss) on derivatives	17.6		17.8
Net Investment Hedging
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrecognized gain on derivatives in net investment hedging relationships, net of tax	471.6		471.6		173.1	16.7
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss		(1,205.0)		(1,205.0)			$ (1,385.6)	$ (858.0)
Other comprehensive earnings (loss) before reclassifications, before tax	(721.5)	170.7	(980.5)	(315.1)
Income tax (benefit) provision		(12.2)		24.8
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		(6.2)		(6.2)			(15.5)	(18.0)
Other comprehensive earnings (loss) before reclassifications, before tax		15.0		23.3
Income tax (benefit) provision		3.1		3.9
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					$ 9.4
Other comprehensive earnings (loss) before reclassifications, before tax	44.6		57.9
Income tax (benefit) provision	4.3		4.3
Net unrecognized gain on derivatives in cash flow hedging relationships, net of tax	22.7		22.7			$ 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		(220.8)		(220.8)			(161.3)	(353.6)
Other comprehensive earnings (loss) before reclassifications, before tax		(77.4)		150.0
Income tax (benefit) provision	85.9	(17.9)	130.8	17.2
Gains and Losses on Marketable Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized loss on marketable securities, net of tax		0.4		0.4			0.2	1.2
Other comprehensive earnings (loss) before reclassifications, before tax		0.2		(0.7)
Income tax (benefit) provision		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		43.6		43.6			(26.3)	(26.1)
Other comprehensive earnings (loss) before reclassifications, before tax	0.4	72.2	(2.3)	72.8
Income tax (benefit) provision		(2.6)		(3.6)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustment		(1,022.0)		(1,022.0)			$ (1,182.7)	$ (461.5)
Other comprehensive earnings (loss) before reclassifications, before tax	(1,149.9)		(1,619.1)
Income tax (benefit) provision		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		(0.2)	0.1	(0.3)
Amortization of actuarial loss included in SG&A		0.5	0.1	0.8
Income tax (benefit) provision	89.8		134.5
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		12.4		15.7
Reclassification out of Accumulated Other Comprehensive Income [Member] | Gains and Losses on Marketable Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income tax (benefit) provision	(0.2)		(0.6)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Plan Items
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amortization of prior service costs		0.2		0.3
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax		(72.5)		(73.3)
Income tax (benefit) provision	(0.2)		0.0
Reclassification out of Accumulated Other Comprehensive Income [Member] | Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive (loss) earnings, before tax		160.7		(560.5)
Income tax (benefit) provision	0.0		0.0
Mylan N.V. | Net Investment Hedging
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrecognized gain (loss) on derivatives	384.4	(77.4)	585.7	150.0
Foreign currency forward contracts | Gains and Losses on Derivatives | Cash Flow Hedging
Accumulated Other Comprehensive Income (Loss) [Line Items]
Sales Revenue, Goods, Net	(28.1)		(42.3)
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	(28.1)	(3.6)	(42.3)	(9.7)
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	(28.1)	(3.6)	(42.3)	(9.7)
Interest rate swaps | Gains and Losses on Derivatives | Cash Flow Hedging
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest expense	1.1		2.2
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	1.1	1.0	2.2	2.1
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	1.1	1.0	2.2	2.1
Pension and other postretirement benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amortization of prior service costs	0.0	0.2	(0.1)	0.3
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	$ 0.1	$ 0.5	0.1	$ 0.8
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