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Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Allowance for loans losses	$ 1,487	$ 1,564
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	1,125,000,000	1,125,000,000
Common stock, shares issued	434,000,000	431,000,000
Tax benefit for accumulated other comprehensive loss	$ 100	$ 30
Common stock held in treasury	116,000,000	82,000,000
FFELP Loans [Member]
Allowance for loans losses	$ 62	$ 78
Private Education Loans [Member]
Allowance for loans losses	$ 1,410	$ 1,471

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Face amount or stated value per share of common stock.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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