Income Taxes - Additional Information (Detail) - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
May 27, 2016 |
May 29, 2015 |
|
| Income Tax Disclosure [Abstract] | ||
| Effective tax rate | 32.60% | 34.60% |
| Tax on unrealized investment gains (losses) accounted for in other comprehensive income | $ 4.9 | $ 28.5 |
| Unrecognized tax benefits | 17.1 | |
| Effect on income tax expense if unrecognized tax benefits are recognized | 15.4 | |
| Decrease in unrecognized tax benefits | 1.4 | |
| Accrued Interest and penalties on unrecognized tax benefit | $ 1.7 | |