Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements Fair Value Hierarchy (Details)

v3.19.2
Fair Value Measurements Fair Value Hierarchy (Details) - Fair Value, Measurements, Recurring [Member]
$ in Millions
Jun. 30, 2019
USD ($)
Assets  
Cash equivalents $ 12,135
Marketable securities 471
Derivative instruments 19
Other investments 479
Total assets measured at fair value 13,104
Liabilities  
Derivative instruments 4
Other liabilities 456
Total liabilities measured at fair value 460
Level 1 [Member]  
Assets  
Cash equivalents 8,135
Marketable securities 417
Derivative instruments 0
Other investments 415
Total assets measured at fair value 8,967
Liabilities  
Derivative instruments 0
Other liabilities 415
Total liabilities measured at fair value 415
Level 2 [Member]  
Assets  
Cash equivalents 4,000
Marketable securities 19
Derivative instruments 19
Other investments 0
Total assets measured at fair value 4,038
Liabilities  
Derivative instruments 4
Other liabilities 0
Total liabilities measured at fair value 4
Level 3 [Member]  
Assets  
Cash equivalents 0
Marketable securities 35
Derivative instruments 0
Other investments 64
Total assets measured at fair value 99
Liabilities  
Derivative instruments 0
Other liabilities 41
Total liabilities measured at fair value 41
Corporate bonds and notes [Member]  
Assets  
Marketable securities 19
Corporate bonds and notes [Member] | Level 1 [Member]  
Assets  
Marketable securities 0
Corporate bonds and notes [Member] | Level 2 [Member]  
Assets  
Marketable securities 19
Corporate bonds and notes [Member] | Level 3 [Member]  
Assets  
Marketable securities 0
Auction rate securities [Member]  
Assets  
Marketable securities 35
Auction rate securities [Member] | Level 1 [Member]  
Assets  
Marketable securities 0
Auction rate securities [Member] | Level 2 [Member]  
Assets  
Marketable securities 0
Auction rate securities [Member] | Level 3 [Member]  
Assets  
Marketable securities 35
Equity securities [Member]  
Assets  
Marketable securities 417
Equity securities [Member] | Level 1 [Member]  
Assets  
Marketable securities 417
Equity securities [Member] | Level 2 [Member]  
Assets  
Marketable securities 0
Equity securities [Member] | Level 3 [Member]  
Assets  
Marketable securities $ 0