Stock-Based Compensation (Ikaria Equity Incentive Plan) (Details) - Ikaria Equity Incentive Plans prior to February 12, 2014 - $ / shares	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Shares
Options vested and exercisable, beginning balance (in shares)	4,594	4,764	5,761
Forfeited (in shares)	(759)	(170)	(997)
Expired (in shares)	(372)
Options vested and exercisable ending balance (in shares)	3,463	4,594	4,764	5,761
Range of Exercise Price
Expired (in dollars per share)	$ 268.80
Weighted Average Exercise Price
Options vested and exercisable, Weighed Average Price (in dollars per share)	136.81	$ 138.17	$ 137.13
Options forfeited, Weighted Average Price (in dollars per share)	129.65	174.75	132.17
Options expired, Weighted Average Price (in dollars per share)	268.80
Options vested and exercisable, Weighed Average Price (in dollars per share)	$ 124.21	$ 136.81	$ 138.17	$ 137.13
Weighted Average Remaining Contractual Life (in years)
Options vested and exercisable, Weighted Average Remaining Contractual Life (in years)	2 years 3 months 18 days	3 years 2 months 12 days	4 years	4 years 3 months 18 days
Minimum
Range of Exercise Price
Options vested and exercisable, Exercise Price (in dollars per share)	$ 116.55	$ 116.55	$ 116.55
Forfeited (in dollars per share)	116.55	174.75	116.55
Options vested and exercisable, Exercise Price (in dollars per share)	116.55	116.55	116.55	$ 116.55
Maximum
Range of Exercise Price
Options vested and exercisable, Exercise Price (in dollars per share)	268.80	268.80	268.80
Forfeited (in dollars per share)	223.65		223.65
Options vested and exercisable, Exercise Price (in dollars per share)	$ 223.65	$ 268.80	$ 268.80	$ 268.80