XML 87 R75.htm IDEA: XBRL DOCUMENT v3.10.0.1
Cash Flow Information (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]    
Interest $ 584 $ 918
Income taxes 1,927 574
Net Purchases of Short-Term Investments    
Short-term investments purchased (1,705) (4,999)
Short-term investments sold 2,701 2,416
Net sale (purchases) of short-term investments $ 996 $ (2,583)