Series A Preferred Stock (Notes)	3 Months Ended
Mar. 31, 2016
Series A Preferred Stock [Abstract]
Preferred Stock [Text Block]	9. SERIES A PREFERRED STOCK On December 4, 2015, NCR issued 820,000 shares of Series A Convertible Preferred Stock to certain entities affiliated with Blackstone Capital Partners VI L.P. and Blackstone Tactical Opportunities L.L.C. (collectively, Blackstone) for an aggregate purchase price of $820 million, or $1,000 per share, pursuant to an Investment Agreement between the Company and Blackstone, dated November 11, 2015. In connection with the issuance of the Series A Convertible Preferred Stock, the Company incurred direct and incremental expenses of $26 million, including financial advisory fees, closing costs, legal expenses and other offering-related expenses. These direct and incremental expenses originally reduced the Series A Convertible Preferred Stock, and will be accreted through retained earnings as a deemed dividend from the date of issuance through the first possible known redemption date, March 16, 2024. Holders of Series A Convertible Preferred Stock are entitled to a cumulative dividend at the rate of 5.5% per annum, payable quarterly in arrears. During the three months ended March 31, 2016, the Company paid dividends-in-kind of $12 million, or 12,133 preferred shares, associated with the Series A Convertible Preferred Stock. As of March 31, 2016 and December 31, 2015, the Company had accrued dividends of $4 million, respectively, associated with the Series A Convertible Preferred Stock. There were no cash dividends declared during the three months ended March 31, 2016 or 2015, respectively. The Series A Convertible Preferred Stock is convertible at the option of the holders at any time into shares of common stock at a conversion price of $30.00 per share or a conversion rate of 33.333 shares of common stock per share of Series A Convertible Preferred Stock. As of March 31, 2016 and December 31, 2015, the maximum number of common shares that could be required to be issued if converted was 27.8 million and 27.4 million shares, respectively.

9. SERIES A PREFERRED STOCK

On December 4, 2015, NCR issued 820,000 shares of Series A Convertible Preferred Stock to certain entities affiliated with Blackstone Capital Partners VI L.P. and Blackstone Tactical Opportunities L.L.C. (collectively, Blackstone) for an aggregate purchase price of $820 million, or $1,000 per share, pursuant to an Investment Agreement between the Company and Blackstone, dated November 11, 2015. In connection with the issuance of the Series A Convertible Preferred Stock, the Company incurred direct and incremental expenses of $26 million, including financial advisory fees, closing costs, legal expenses and other offering-related expenses. These direct and incremental expenses originally reduced the Series A Convertible Preferred Stock, and will be accreted through retained earnings as a deemed dividend from the date of issuance through the first possible known redemption date, March 16, 2024. Holders of Series A Convertible Preferred Stock are entitled to a cumulative dividend at the rate of 5.5% per annum, payable quarterly in arrears. During the three months ended March 31, 2016, the Company paid dividends-in-kind of $12 million, or 12,133 preferred shares, associated with the Series A Convertible Preferred Stock. As of March 31, 2016 and December 31, 2015, the Company had accrued dividends of $4 million, respectively, associated with the Series A Convertible Preferred Stock. There were no cash dividends declared during the three months ended March 31, 2016 or 2015, respectively.

The Series A Convertible Preferred Stock is convertible at the option of the holders at any time into shares of common stock at a conversion price of $30.00 per share or a conversion rate of 33.333 shares of common stock per share of Series A Convertible Preferred Stock. As of March 31, 2016 and December 31, 2015, the maximum number of common shares that could be required to be issued if converted was 27.8 million and 27.4 million shares, respectively.