Trust Account and Fair Value Measurements - Treasury Securities Fund, Fair Values Investments Quoted Price in Active Markets for identical Assets (Detail)	Sep. 30, 2020 USD ($)
Investments held in Trust Account	$ 277,838,872
US Treasury Securities Money Market Fund [Member]
Investments held in Trust Account	277,838,872
Quoted Prices In Active Markets (Level 1) [Member] | US Treasury Securities Money Market Fund [Member]
Investments held in Trust Account	277,838,872
Significant Other Observable Inputs (Level 2) [Member] | US Treasury Securities Money Market Fund [Member]
Investments held in Trust Account	0
Significant Other Unobservable Inputs (Level 3) [Member] | US Treasury Securities Money Market Fund [Member]
Investments held in Trust Account	$ 0