Earnings Per Share and Stock Issuances - Additional Information (Details) $ in Millions	Feb. 29, 2020 USD ($)
Class of Stock [Line Items]
Stock repurchase program, remaining authorized repurchase amount	$ 612.0
March 2015 [Member]
Class of Stock [Line Items]
Stock repurchase program, remaining authorized repurchase amount	12.0
Stock repurchase program, authorized amount	600.0
November 2019 [Member]
Class of Stock [Line Items]
Stock repurchase program, authorized amount	$ 600.0