Share-Based Compensation (Summary of Option Transactions) (Details)			12 Months Ended
		Jan. 11, 2017 $ / shares	Dec. 31, 2017 $ / shares shares	Dec. 31, 2017 $ / shares € / shares shares	Dec. 31, 2016 € / shares shares	Dec. 31, 2015 € / shares shares	Dec. 31, 2014 € / shares shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Weighted average grant-date fair value of options granted (in dollars per share) | (per share)			$ 8.79		€ 7.70	€ 6.01
Stock Option Activity
Number of options outstanding, beginning balance			2,188,800	2,188,800	2,420,500	2,520,500
Number of options adjusted due to FMC technologies transaction	[1]		2,188,800	2,188,800
Number of options granted			798,400	798,400	595,100	568,600
Number of options exercised			0	0	(25,500)	(561,700)
Number of options cancelled			(292,200)	(292,200)	(801,300)	(106,900)
Number of options outstanding, ending balance			4,883,800	4,883,800	2,188,800	2,420,500	2,520,500
Stock Option Weighted Average Exercise Price
Options outstanding, weighted average exercise price per share, beginning balance (in dollars per share) | € / shares				€ 61.72	€ 61.88	€ 60.03
Options adjusted due to FMC Technologies transaction, weighted average exercise price per share (in dollars per share) | $ / shares	[1]	$ 0	$ 0.00
Options granted, weighted average exercise price per share (in dollars per share) | (per share)			29.29		48.33	47.83
Options exercised, weighted average exercise price per share (in dollars per share) | (per share)			0.00		57.22	37.87
Options cancelled, weighted average exercise price per share (in dollars per share) | (per share)			47.60		52.43	69.62
Options outstanding, weighted average exercise price per share, ending balance (in dollars per share) | (per share)			$ 36.35		€ 61.72	€ 61.88	€ 60.03
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Options outstanding, Weighted average remaining contractual term (in years)			4 years 7 months 6 days	4 years 7 months 6 days	5 years	3 years 6 months	2 years 8 months 12 days
Options exercisable, number of options (in shares)			1,788,800	1,788,800
Options exercisable, weighted average exercise price per share (in dollars per share) | $ / shares			$ 51.61	€ 51.61
Options exercisable, Weighted average remaining contractual term (in years)			1 year 7 months 6 days	1 year 7 months 6 days

[1] The Weighted-Average Grant Date Fair Value for the increase in shares due to the merger remains at $0.00 in order to recalculate the new weighted average for the December 31, 2016 nonvested shares (see Note 2)