Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Assets, Current [Abstract]
Cash and cash equivalents	$ 1,681	$ 509
Accounts receivable, net of allowances of $54 and $44 as of June 30, 2020 and December 31, 2019, respectively	1,249	1,490
Inventories	782	784
Other current assets	424	361
Total current assets	4,136	3,144
Property, Plant and Equipment, Net	394	413
Goodwill	2,823	2,832
Intangible Assets, Net (Excluding Goodwill)	562	607
Operating Lease, Right-of-Use Asset	347	391
Assets for Plan Benefits, Defined Benefit Plan	182	178
Deferred Income Taxes and Other Assets, Noncurrent	849	821
Other Assets, Noncurrent	656	601
Assets, Total	9,949	8,987
Liabilities, Current [Abstract]
Short-term Debt	217	282
Accounts Payable, Current	680	840
Employee-related Liabilities, Current	249	308
Contract with Customer, Liability, Current	563	502
Other Liabilities, Current	585	606
Liabilities, Current, Total	2,294	2,538
Long-term debt	4,473	3,277
Pension and indemnity plan liabilities	864	858
Postretirement and postemployment benefits liabilities	114	111
Income tax accruals	91	92
Operating lease liabilities	334	369
Other liabilities	254	240
Liabilities, Total	8,424	7,485
Commitments and Contingencies (Note 9)
Series A Convertible Preferred Stock, par value $0.01, 3.0 shares authorized	402	395
Stockholders’ equity
Preferred stock: par value $0.01 per share, 100.0 shares authorized, no shares issued and outstanding as of June 30, 2020 and December 31, 2019, respectively	0	0
Common stock: par value $0.01 per share, 500.0 shares authorized, 128.2 and 127.7 shares issued and outstanding as of June 30, 2020 and December 31, 2019, respectively	1	1
Paid-in capital	300	312
Retained earnings	1,134	1,060
Accumulated other comprehensive loss	(315)	(269)
Total NCR stockholders’ equity	1,120	1,104
Noncontrolling interests in subsidiaries	3	3
Total stockholders’ equity	1,123	1,107
Total liabilities and stockholders’ equity	$ 9,949	$ 8,987