XML 83 R66.htm IDEA: XBRL DOCUMENT v3.8.0.1
Income Taxes - Unrecognized Tax Benefit (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Gross unrecognized tax benefits - January 1 $ 183 $ 209 $ 248
Increases related to tax positions from prior years 3 3 17
Decreases related to tax positions from prior years (1) (34) (37)
Increases related to tax provisions taken during the current year 23 23 35
Settlements with tax authorities (4) (6) (33)
Lapses of statutes of limitation (8) (12) (21)
Total Gross unrecognized tax benefits - December 31 196 183 209
Total amount of gross unrecognized tax benefits that would affect NCR's effective tax rate if realized 97    
Recognized interest and penalties expense (benefit) associated with uncertain tax positions (2) 0 $ (4)
Interest and penalties accrued associated with uncertain tax positions 45 $ 41  
Undistributed earnings of foreign subsidiaries 2,500    
Minimum [Member]      
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Significant change in unrecognized tax benefits is reasonably possible, estimated range of change, upper bound 35    
Maximum [Member]      
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Significant change in unrecognized tax benefits is reasonably possible, estimated range of change, upper bound $ 40