What is the sufficient amount of belief in creed that absolves one's responsibility?

It is sufficient for a Muslim to believe in Allah (in His Oneness in Divinity, Lordship, Names, and Attributes), in the angels, in the messengers, in the heavenly books—the last of which is the Quran (which abrogates previous scriptures, is uncorrupted, and is the word of Allah in both لفظ (wording) and معنى (meaning))—and in the Last Day (including the questioning by the two angels, the torment and bliss of the grave, the Sirat (bridge), the Mizan (scale), and Paradise and Hell), and in divine decree, both good and evil (and that Allah is the Creator of the servants' actions, and the servant is accountable for them). Furthermore, it is essential to believe that faith is both word and deed, that its adherents vary in their degrees of faith, that those who commit sins will not abide eternally in Hell, unlike disbelievers, and to believe in the virtue and ranks of the Companions of the Prophet (peace be upon him), the best of whom are the four Rightly Guided Caliphs.