Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Current assets
Cash and cash equivalents	$ 254	$ 1,731
Accounts receivable, net of allowances of $47 and $46, respectively	1,987	1,680
Other current assets	284	303
Current assets of discontinued operations	25	1,664
Total current assets	2,550	5,378
Long-term assets
Property and equipment, net of $1,765 and $1,646 in accumulated depreciation, respectively	1,821	1,891
Operating lease assets	829	844
Goodwill	2,493	2,536
Identifiable intangible assets, net of $598 and $536 in accumulated amortization, respectively	603	675
Other long-term assets	237	187
Long-term assets of discontinued operations	0	4,666
Total long-term assets	5,983	10,799
Total assets	8,533	16,177
Current liabilities
Accounts payable	963	854
Accrued expenses	1,199	1,044
Short-term borrowings and current maturities of long-term debt	56	1,281
Short-term operating lease liabilities	153	152
Other current liabilities	132	102
Current liabilities of discontinued operations	24	1,728
Total current liabilities	2,527	5,161
Long-term debt	3,515	5,240
Deferred tax liability	306	286
Employee benefit obligations	126	131
Long-term operating lease liabilities	677	696
Other long-term liabilities	366	384
Long-term liabilities of discontinued operations	0	1,430
Total long-term liabilities	4,990	8,167
Stockholders’ equity
Convertible perpetual preferred stock, $0.001 par value; 10 shares authorized; — and 0.001 of Series A shares issued and outstanding as of September 30, 2021 and December 31, 2020, respectively	0	1
Common stock, $0.001 par value; 300 shares authorized; 115 and 102 shares issued and outstanding as of September 30, 2021 and December 31, 2020, respectively	0	0
Additional paid-in capital	1,174	1,998
Retained earnings (accumulated deficit)	(79)	868
Accumulated other comprehensive loss	(79)	(158)
Total stockholders’ equity before noncontrolling interests	1,016	2,709
Noncontrolling interests	0	140
Total equity	1,016	2,849
Total liabilities and equity	$ 8,533	$ 16,177