Restructuring Charges and Asset Impairments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Reserve
Balance at	$ 15,449	$ 43,720
Expenses, net	23,705	24,459
Cash payments	(27,148)	(52,730)	$ (26,080)
Balance at	12,006	15,449	43,720
Asset impairment charges	46,000	1,000	4,000
Write-off of capitalized software costs	$ 39,000
Minimum
Restructuring Reserve
Restructuring reserve, payment period	12 months
Maximum
Restructuring Reserve
Restructuring reserve, payment period	24 months
Severance and benefits costs
Restructuring Reserve
Balance at	$ 13,641	42,151
Expenses, net	22,794	18,426
Cash payments	(24,498)	(46,936)
Balance at	11,937	13,641	42,151
Other exit costs
Restructuring Reserve
Balance at	1,808	1,569
Expenses, net	911	6,033
Cash payments	(2,650)	(5,794)
Balance at	$ 69	$ 1,808	$ 1,569