Comprehensive Earnings (Components Of Other Comprehensive Loss) (Details) - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized gain (loss) on marketable securities, net of tax, beginning of period		$ (1,400,000)		$ (1,200,000)
Net unrecognized losses and prior service cost related to defined benefit plans, net of tax		(261,700,000)		(261,700,000)		$ 266,400,000	$ 271,400,000
Foreign currency translation adjustment, beginning of period		(3,589,200,000)		(3,246,700,000)
Accumulated other comprehensive loss, net of tax, beginning of period		(2,941,000,000)		(2,747,400,000)
Net sales		3,785,900,000	$ 3,909,500,000	7,439,400,000	$ 7,628,600,000
Interest expense		145,800,000	143,700,000	284,200,000	290,700,000
Change in unrecognized gain and prior service cost related to defined benefit plans		(5,600,000)	(6,800,000)	(11,800,000)	(5,500,000)
Income tax expense		(65,400,000)	69,000,000.0	25,300,000	167,000,000.0
Net unrealized gain (loss) on marketable securities, net of tax, end of period		(1,400,000)		(1,400,000)
Net unrecognized losses and prior service cost related to defined benefit plans, net of tax, end of period		(261,700,000)		(261,700,000)
Foreign currency translation adjustment, end of period		(3,678,900,000)		(3,678,900,000)
Accumulated other comprehensive loss, net of tax, end of period		(2,975,200,000)		(2,975,200,000)
Gains and Losses on Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrecognized gains (losses) on derivatives, net of tax, beginning of period			(16,800,000)		(18,500,000)
Other comprehensive earnings (loss) before reclassifications, before tax			43,500,000		54,000,000.0
Income tax expense			9,100,000		10,200,000
Net unrecognized gains (losses) on derivatives, net of tax, end of period	$ (16,800,000)		10,900,000		10,900,000
Gains and Losses on Derivatives | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrecognized losses on derivatives in net investment hedging relationships, net of tax					39,600,000
Gains and Losses on Derivatives | Reclassification out of Accumulated Other Comprehensive Income [Member] | Foreign currency forward contracts
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net sales		(10,000,000.0)	(7,800,000)	(16,600,000)	(16,700,000)
Gains and Losses on Derivatives | Reclassification out of Accumulated Other Comprehensive Income [Member] | Interest rate swaps
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest expense		1,600,000	1,100,000	3,200,000	2,300,000
Gains and Losses on Marketable Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrealized gain (loss) on marketable securities, net of tax, beginning of period			(1,600,000)		(2,300,000)
Other comprehensive earnings (loss) before reclassifications, before tax			200,000		1,100,000
Income tax expense			(100,000)		100,000
Net unrealized gain (loss) on marketable securities, net of tax, end of period	(1,600,000)		(1,300,000)		(1,300,000)
Gains and Losses on Marketable Securities | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Income tax expense		0		(100,000)
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	269,300,000		264,500,000		264,500,000			$ 268,500,000
Other comprehensive earnings (loss) before reclassifications, before tax		(2,000,000.0)	3,800,000	(4,400,000)	10,100,000
Income tax expense			2,000,000.0		1,500,000
Net unrecognized losses and prior service cost related to defined benefit plans, net of tax, end of period	269,300,000		264,500,000		264,500,000
Defined Benefit Plan Items | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Change in unrecognized gain and prior service cost related to defined benefit plans					(5,500,000)
Income tax expense		(900,000)		(2,100,000)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation adjustment, beginning of period			(3,340,600,000)		(3,385,900,000)
Other comprehensive earnings (loss) before reclassifications, before tax		(89,700,000)		(432,200,000)
Income tax expense			0		0
Foreign currency translation adjustment, end of period	(3,340,600,000)		(3,594,700,000)		(3,594,700,000)
Foreign Currency Translation Adjustment | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Tax			(254,100,000)		(208,800,000)
Income tax expense		0		0
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive loss, net of tax, beginning of period			(2,764,600,000)		(2,761,200,000)
Other comprehensive earnings (loss) before reclassifications, before tax		(6,200,000)	(219,400,000)	(148,600,000)	(222,600,000)
Income tax expense			4,300,000		(8,200,000)
Accumulated other comprehensive loss, net of tax, end of period	(2,764,600,000)		(3,005,600,000)		(3,005,600,000)
AOCI Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amortization of prior service costs		600,000		1,100,000
Other comprehensive earnings (loss), reclassification adjustment from AOCE, pension and other postretirement benefit plans, for net gain (loss), before tax		(4,200,000)		(8,500,000)	(10,000,000.0)
Income tax expense		16,000,000.0		58,400,000
AOCI Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Foreign currency forward contracts
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net sales		(10,000,000.0)	(7,800,000)	(16,600,000)	(16,700,000)
AOCI Attributable to Parent [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member] | Interest rate swaps
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest expense		1,600,000	1,100,000	3,200,000	2,300,000
Cash Flow Hedging
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrecognized losses on derivatives in net investment hedging relationships, net of tax		8,700,000	36,800,000	37,400,000
Cash Flow Hedging | Gains and Losses on Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrecognized gains (losses) on derivatives, net of tax, beginning of period		13,600,000		(8,000,000.0)
Other comprehensive earnings (loss) before reclassifications, before tax		17,100,000		50,800,000
Income tax expense		2,100,000		9,200,000
AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax		20,200,000		20,200,000
Cash Flow Hedging | Gains and Losses on Derivatives | Foreign currency forward contracts
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net sales		(10,000,000.0)		(16,600,000)
Cash Flow Hedging | Gains and Losses on Derivatives | Interest rate swaps
Accumulated Other Comprehensive Income (Loss) [Line Items]
Interest expense		1,600,000		3,200,000
Net Investment Hedging
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulate Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Net Investment Hedges, Effect Net of Taxx		423,200,000		423,200,000		$ 369,600,000	$ 237,100,000
Net Investment Hedging | Gains and Losses on Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrecognized gains (losses) on derivatives, net of tax, beginning of period			325,100,000		377,000,000.0
Other comprehensive earnings (loss) before reclassifications, before tax			(12,800,000)		(79,000,000.0)
Income tax expense		14,800,000	(2,700,000)	51,400,000	(17,000,000.0)
Net unrecognized gains (losses) on derivatives, net of tax, end of period	$ 325,100,000		315,000,000.0		315,000,000.0
Mylan N.V. | Net Investment Hedging
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net unrecognized losses on derivatives in net investment hedging relationships, net of tax				237,500,000	(79,000,000.0)
Pension and other postretirement benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amortization of prior service costs		600,000	0	1,100,000	0
Other Comprehensive Income, Gain (Loss), Defined Benefit Plan, Divestiture Of Plan [Abstract]			(5,600,000)		(5,600,000)
Recognized net actuarial gains		(4,200,000)	$ (5,000,000.0)	(8,500,000)	$ (10,000,000.0)
Pension and other postretirement benefits | Defined Benefit Plan Items | Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amortization of prior service costs		$ 600,000		$ 1,100,000