Earnings (Loss) Per Share (Detail) - shares shares in Millions |
3 Months Ended | 6 Months Ended | |
|---|---|---|---|
Jun. 30, 2021 |
Jun. 30, 2021 |
Jun. 30, 2020 |
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | |||
| Outstanding stock awards excluded from calculation of diluted earnings per share | 26 | 26 | |
| Outstanding Stock Awards and Common Stock Warrants | |||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | |||
| Outstanding stock awards excluded from calculation of diluted earnings per share | 19 | 19 | |
| Convertible Notes | |||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | |||
| Outstanding stock awards excluded from calculation of diluted earnings per share | 4 | 4 | |