Asset Impairment Charges and Facility Closing and Reorganization Costs - Approved Plans and Related Charges (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ (2,679)	$ 7,844	$ 73,444	$ 22,947
Organizational effectiveness	0	4,796	(331)	12,210
Enterprise-wide cost productivity plan	0	0	14,863	0
Closure of facilities, net
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(2,679)	3,048	58,912	10,737
Restructuring costs incurred to date	110,400		110,400
Expected restructuring costs	10,700		10,700
Facility closing and reorganization costs, net
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ (2,679)	$ 7,844	$ 73,444	$ 22,947