Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 689,870	$ 1,009,021
Short-term investments	55,699	48,988
Accounts receivable (net of allowance of $13,515 and $14,786, respectively)	408,703	427,022
Short-term finance receivables (net of allowance of $14,924 and $12,187, respectively)	812,055	828,003
Inventories	49,051	40,769
Current income taxes	39,100	58,439
Other current assets and prepayments	102,104	74,589
Assets of discontinued operations	313,356	334,848
Total current assets	2,469,938	2,821,679
Property, plant and equipment, net	398,909	373,503
Rental property and equipment, net	180,585	183,956
Long-term finance receivables (net of allowance of $6,420 and $6,446 respectively)	597,302	652,087
Goodwill	1,767,848	1,774,645
Intangible assets, net	249,125	272,186
Noncurrent income taxes	54,099	59,909
Other assets	528,945	540,750
Total assets	6,246,751	6,678,715
Current liabilities:
Accounts payable and accrued liabilities	1,349,344	1,450,149
Current income taxes	5,686	8,823
Current portion of long-term debt	334,999	271,057
Advance billings	237,709	257,766
Liabilities of discontinued operations	84,219	72,808
Total current liabilities	2,011,957	2,060,603
Deferred taxes on income	234,190	234,643
Tax uncertainties and other income tax liabilities	105,803	116,551
Long-term debt	3,237,810	3,559,278
Other noncurrent liabilities	461,074	519,079
Total liabilities	6,050,834	6,490,154
Commitments and contingencies (See Note 14)
Stockholders’ equity:
Cumulative preferred stock, $50 par value, 4% convertible	1	1
Cumulative preference stock, no par value, $2.12 convertible	415	441
Common stock, $1 par value (480,000,000 shares authorized; 323,337,912 shares issued)	323,338	323,338
Additional paid-in capital	122,732	138,367
Retained earnings	5,248,991	5,229,584
Accumulated other comprehensive loss	(810,251)	(792,173)
Treasury stock, at cost (136,104,630 and 136,734,174 shares, respectively)	(4,689,309)	(4,710,997)
Total stockholders’ equity	195,917	188,561
Total liabilities and stockholders’ equity	$ 6,246,751	$ 6,678,715