Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 502	$ 397
Accounts receivable, net of allowances of $52 and $42, respectively	2,596	2,725
Other current assets	590	466
Total current assets	3,688	3,588
Property and equipment, net of $1,585 and $1,110 in accumulated depreciation, respectively	2,605	2,664
Goodwill	4,467	4,564
Identifiable intangible assets, net of $706 and $560 in accumulated amortization, respectively	1,253	1,435
Other long-term assets	257	351
Total long-term assets	8,582	9,014
Total assets	12,270	12,602
Current liabilities:
Accounts payable	1,258	1,251
Accrued expenses	1,480	1,526
Short-term borrowings and current maturities of long-term debt	367	104
Other current liabilities	208	116
Total current liabilities	3,313	2,997
Long-term debt	3,902	4,418
Deferred tax liability	444	419
Employee benefit obligations	153	162
Other long-term liabilities	488	596
Total long-term liabilities	4,987	5,595
Stockholders’ equity:
Convertible perpetual preferred stock, $0.001 par value; 10 shares authorized; 0.07 of Series A shares issued and outstanding as of December 31, 2018 and 2017, respectively	41	41
Common stock, $0.001 par value; 300 shares authorized; 116 and 120 shares issued and outstanding as of December 31, 2018 and 2017, respectively	0	0
Additional paid-in capital	3,311	3,590
Retained earnings (accumulated deficit)	377	(43)
Accumulated other comprehensive (loss) income	(154)	16
Total stockholders’ equity before noncontrolling interests	3,575	3,604
Noncontrolling interests	395	406
Total equity	3,970	4,010
Total liabilities and equity	$ 12,270	$ 12,602