Shareholders' Equity (Summary Of Change In Shareholders' Equity) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Shareholders' equity, beginning balance			$ 13,307.6	$ 11,117.6
Net earnings (loss)			301.3	451.7
Other comprehensive loss, net of tax	$ (291.6)	$ 344.4	(1,122.2)	1,652.5
Stock option activity			15.4	12.8
Ordinary Share Repurchase			(432.0)
Share-based compensation expense			(8.6)	64.2
Issuance of restricted stock, net of shares withheld			(8.1)	5.8
Cumulative effect of the adoption			12.8
Other				(1.4)
Shareholders' equity, ending balance	$ 12,066.2	13,291.6	$ 12,066.2	13,291.6
Total Mylan N.V. Shareholders' Equity
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Shareholders' equity, beginning balance				11,116.2
Net earnings (loss)				451.7
Other comprehensive loss, net of tax				1,652.5
Stock option activity				12.8
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition				64.2
Issuance of restricted stock, net of shares withheld				(5.8)
Other				0.0
Shareholders' equity, ending balance		13,291.6		13,291.6
Noncontrolling Interest
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Shareholders' equity, beginning balance				1.4
Net earnings (loss)				0.0
Other				(1.4)
Shareholders' equity, ending balance		$ 0.0		$ 0.0