|
Common Stock Repurchase Programs - Additional Information (Detail) (USD $)
Share data in Millions, unless otherwise specified |
3 Months Ended | 0 Months Ended | |||
|---|---|---|---|---|---|
|
Mar. 31, 2015
|
Mar. 31, 2014
|
Mar. 16, 2015
|
Mar. 12, 2015
|
Oct. 31, 2014
|
|
| Common Stock [Line Items] | |||||
| Repurchases of common stock | $ 233,601,000 | $ 116,989,000 | |||
| Common stock authorized for repurchase | 600,000,000 | ||||
| Common stock shares issued | 2.7 | ||||
| Common stock paid | 233,600,000 | ||||
| Common stock purchase | 200,000,000 | ||||
| Accelerated Share Repurchase (ASR) Agreements [Member] | |||||
| Common Stock [Line Items] | |||||
| Common stock shares issued | 2.2 | ||||
| Common stock paid | 200,000,000 | ||||
| Accelerated Share Repurchase Programs and Open Market Purchases [Member] | |||||
| Common Stock [Line Items] | |||||
| Repurchases of common stock | $ 0 | ||||