Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Investments in Unrealized Loss Position (Details)

v3.20.1
Fair Value Measurements - Investments in Unrealized Loss Position (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Realized gains on investments recorded in gain on sale of receivables and investments $ 3 $ 0
Debt Securities    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, beginning of period 75 170
Purchases of investments 16 7
Payments on investments (1) (1)
Sale of investments (33) 0
Unrealized gains (losses) on investments recorded in OCI 3 2
Balance, end of period $ 63 $ 178