December 31, 2013 | December 31, 2012 | ||||||||||||||
(in millions) | Gross Carrying Amount | Accumulated Amortization | Gross Carrying Amount | Accumulated Amortization | |||||||||||
Non-amortizable intangible assets | $ | 1,798 | $ | 2,046 | |||||||||||
Amortizable intangible assets | 1,940 | $ | 545 | 2,046 | $ | 473 | |||||||||
Total other intangible assets | $ | 3,738 | $ | 545 | $ | 4,092 | $ | 473 | |||||||