XML 70 R69.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Financial Instruments and Fair Value Measures - Available-for-sale Securities (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2017
Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]      
Debt security maturity period 5 years    
Amortized cost     $ 1,546,000,000
Gross unrealized gains     1,000,000
Gross unrealized losses     (11,000,000)
Fair value     1,536,000,000
Other than temporary impairments $ 0    
Net realized gains on available-for-sale securities   $ 90,000,000  
Short-term Investments      
Debt Securities, Available-for-sale [Line Items]      
Debt securities classified as short-term $ 0   204,000,000
Asset backed securities      
Debt Securities, Available-for-sale [Line Items]      
Amortized cost     423,000,000
Gross unrealized gains     0
Gross unrealized losses     (2,000,000)
Fair value     421,000,000
Corporate debt securities      
Debt Securities, Available-for-sale [Line Items]      
Amortized cost     1,042,000,000
Gross unrealized gains     1,000,000
Gross unrealized losses     (9,000,000)
Fair value     1,034,000,000
Other debt securities      
Debt Securities, Available-for-sale [Line Items]      
Amortized cost     81,000,000
Gross unrealized gains     0
Gross unrealized losses     0
Fair value     $ 81,000,000