Equity and Accumulated Other Comprehensive Income - Additional Information (Detail) |
3 Months Ended |
|---|---|
|
Mar. 31, 2016
shares
| |
| Equity and Comprehensive Income [Line Items] | |
| Common shares issued from Treasury stock | 3,100,000 |
| Share Buyback Program | |
| Equity and Comprehensive Income [Line Items] | |
| Number of shares repurchased | 0 |
| Share Buyback Program | Maximum | |
| Equity and Comprehensive Income [Line Items] | |
| Number of shares authorized for repurchase | 97,200,000 |