Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation Plans - 2013 Omnibus Equity Incentive Plan - Award Limitations - Additional Information (Detail)

v3.2.0.727
Stock-Based Compensation Plans - 2013 Omnibus Equity Incentive Plan - Award Limitations - Additional Information (Detail) - Jun. 30, 2015
$ in Millions
USD ($)
Incentive_Plan
award
shares
2013 Omnibus Equity Incentive Plan [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of active equity plans | Incentive_Plan 1
Common stock shares reserved for issuance of awards 5,500,000
Common stock shares available for grant 3,283,183
Common stock available for future issuance authorized annual percentage increase 3.00%
Increase of common stock share reserve approved 1,100,000
Options & SARs [Member] | Minimum [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share limitations to awards granted under the 2013 Plan 500,000
Options & SARs [Member] | Maximum [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share limitations to awards granted under the 2013 Plan 1,000,000
Restricted Stock and RSUs [Member] | Minimum [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share limitations to awards granted under the 2013 Plan 500,000
Restricted Stock and RSUs [Member] | Maximum [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share limitations to awards granted under the 2013 Plan 1,000,000
Performance Shares [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of award limitation, performance units or performance shares | award 1
Performance Shares [Member] | Minimum [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share limitations to awards granted under the 2013 Plan 500,000
Grant date fair value limitations to awards granted under the 2013 Plan | $ $ 2
Performance Shares [Member] | Maximum [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share limitations to awards granted under the 2013 Plan 1,000,000
Grant date fair value limitations to awards granted under the 2013 Plan | $ $ 5