XML 62 R44.htm IDEA: XBRL DOCUMENT v3.8.0.1
Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($)
$ in Millions
Mar. 31, 2018
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]    
Non-amortizable intangible assets $ 17,868 $ 17,671
Amortizable intangible assets 2,426 2,386
Total intangible assets, gross 20,294 20,057
Accumulated amortization (1,484) (1,418)
Intangible assets, net $ 18,810 $ 18,639