Supplemental Equity and Comprehensive Income Information - Stock Narrative (Details) - $ / shares |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|---|
| Supplemental Equity and Comprehensive Income Information | |||
| Common stock, par value per share (in dollars per share) | $ 0.01 | $ 0.01 | $ 0.01 |
| Common stock, shares authorized (in shares) | 3,000,000,000.0 | 3,000,000,000.0 | 3,000,000,000.0 |
| Common stock, shares issued (in shares) | 944,033,056 | 944,033,056 | 944,033,056 |
| Preferred stock, shares authorized (in shares) | 10,000,000 | 10,000,000 | 10,000,000 |