Fair Value Measurements - Recurring Reconciliation (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
|
Reconciliation of items measured at fair value on a recurring basis that used significant unobservable inputs (Level 3) | ||||
Balance at the beginning of the period | $ 34 | $ 37 | $ 34 | $ 46 |
Total gains or losses included in earnings | 0 | 0 | 0 | 0 |
Total gains or losses included in other comprehensive income | 0 | 0 | 0 | 0 |
Purchases and issuances | 0 | 0 | 0 | 10 |
Sales and settlements | 0 | 0 | 0 | (19) |
Transfers in and/or out of level 3 | 0 | 0 | 0 | 0 |
Balance at the end of the period | 34 | 37 | 34 | 37 |
Change in unrealized gains or losses for the period included in earnings for securities held at the end of the reporting period | $ 0 | $ 0 | $ 0 | $ 0 |