Equity and Comprehensive Income - Additional Information - Dividends (Detail) - $ / shares |
3 Months Ended | 8 Months Ended | ||
|---|---|---|---|---|
May 13, 2018 |
May 07, 2017 |
May 13, 2018 |
May 07, 2017 |
|
| Dividends Payable [Line Items] | ||||
| Dividends declared | $ 0.57 | $ 7.50 | $ 1.57 | $ 8.40 |
| Dividend Rate | ||||
| Dividends Payable [Line Items] | ||||
| Dividends declared | $ 0.57 | $ 0.50 | ||