XML 85 R64.htm IDEA: XBRL DOCUMENT v3.10.0.1
Investments in Debt and Equity Securities (Details 2) - USD ($)
$ in Millions
Jun. 30, 2018
Dec. 31, 2017
Less than 12 months    
Fair Value $ 686 $ 587
Unrealized Losses 15 9
12 months or more    
Fair Value 148 163
Unrealized Losses 6 5
Total    
Fair Value 834 750
Unrealized Losses 21 14
Corporate bonds    
Less than 12 months    
Fair Value 529 312
Unrealized Losses 12 2
12 months or more    
Fair Value 29 38
Unrealized Losses 1 0
Total    
Fair Value 558 350
Unrealized Losses 13 2
U.S. governmental agency mortgage-backed securities    
Less than 12 months    
Fair Value 157 129
Unrealized Losses 3 1
12 months or more    
Fair Value 119 110
Unrealized Losses 5 3
Total    
Fair Value 276 239
Unrealized Losses $ 8 4
Large capitalization value    
Less than 12 months    
Fair Value   129
Unrealized Losses   5
12 months or more    
Fair Value   14
Unrealized Losses   2
Total    
Fair Value   143
Unrealized Losses   7
Smaller company growth    
Less than 12 months    
Fair Value   17
Unrealized Losses   1
12 months or more    
Fair Value   1
Unrealized Losses   0
Total    
Fair Value   18
Unrealized Losses   $ 1