Share-Based Compensation (Summary Of Changes In Nonvested Stock Units) (Details) - $ / shares			12 Months Ended
		Jan. 11, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Restricted Stock Units (RSUs)
Shares [Roll Forward]
Nonvested at beginning of period (in shares)			0
Adjustment due to FMC Technologies transaction (in shares)			213,100
Granted (in shares)			1,516,900
Vested (in shares)			0
Cancelled/forfeited (in shares)			(7,700)
Nonvested at period end (in shares)			1,722,300	0
Weighted-Average Grant Date Fair Value [Roll Forward]
Granted, weighted-average grant date fair value, beginning of period (in dollars per share)			$ 0.00
Assumed in the FMC Technologies Merger (in dollars per share)			35.85
Granted, weighted-average grant date fair value (in dollars per share)			27.54
Vested, weighted average grant date fair value (in dollars per share)			0.00
Cancelled/forfeited, weighted-average grant date fair value (in dollars per share)			35.85
Granted, weighted-average grant date fair value, period end ( in dollars per share)			$ 28.53	$ 0.00
Performance Share Units
Shares [Roll Forward]
Nonvested at beginning of period (in shares)			1,314,600
Adjustment due to FMC Technologies transaction (in shares)	[1]		1,306,000
Granted (in shares)			855,200
Vested (in shares)			(642,000)
Cancelled/forfeited (in shares)			(85,000)
Nonvested at period end (in shares)			2,748,800	1,314,600
Weighted-Average Grant Date Fair Value [Roll Forward]
Granted, weighted-average grant date fair value, beginning of period (in dollars per share)			$ 60.15
Assumed in the FMC Technologies Merger (in dollars per share)	[1]	$ 0	0.00
Granted, weighted-average grant date fair value (in dollars per share)			31.65	$ 42.74	$ 43.16
Vested, weighted average grant date fair value (in dollars per share)			52.42
Cancelled/forfeited, weighted-average grant date fair value (in dollars per share)			25.33
Granted, weighted-average grant date fair value, period end ( in dollars per share)			$ 25.59	$ 60.15

[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).