Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 377	$ 502
Accounts receivable, net of allowances of $58 and $52, respectively	2,500	2,596
Other current assets	465	590
Total current assets	3,342	3,688
Property and equipment, net of $2,054 and $1,585 in accumulated depreciation, respectively	2,704	2,605
Operating lease assets	2,245
Goodwill	4,450	4,467
Identifiable intangible assets, net of $850 and $706 in accumulated amortization, respectively	1,092	1,253
Other long-term assets	295	257
Total long-term assets	10,786	8,582
Total assets	14,128	12,270
Current liabilities:
Accounts payable	1,157	1,258
Accrued expenses	1,414	1,480
Short-term borrowings and current maturities of long-term debt	84	367
Short-term operating lease liabilities	468
Other current liabilities	135	208
Total current liabilities	3,258	3,313
Long-term debt	5,182	3,902
Deferred tax liability	495	444
Employee benefit obligations	157	153
Long-term operating lease liabilities	1,776
Other long-term liabilities	364	488
Total long-term liabilities	7,974	4,987
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, 2019 and 2018, respectively	41	41
Common stock, $0.001 par value; 300 shares authorized; 92 and 116 shares issued and outstanding as of December 31, 2019 and 2018, respectively	0	0
Additional paid-in capital	2,061	3,311
Retained earnings	786	377
Accumulated other comprehensive loss	(145)	(154)
Total stockholders’ equity before noncontrolling interests	2,743	3,575
Noncontrolling interests	153	395
Total equity	2,896	3,970
Total liabilities and equity	$ 14,128	$ 12,270