Asset Impairment Charges and Facility Closing and Reorganization Costs - Approved Plans and Related Charges (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 67,661	$ 5,817	$ 76,123	$ 15,103
Organizational effectiveness	0	1,614	(331)	7,414
Enterprise-wide cost productivity plan	8,432	0	14,863	0
Closure of facilities, net
Restructuring Cost and Reserve [Line Items]
Restructuring charges	59,229	4,203	61,591	7,689
Restructuring costs incurred to date	110,900		110,900
Expected restructuring costs	13,200		13,200
Facility closing and reorganization costs, net
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 67,661	$ 5,817	$ 76,123	$ 15,103