EPS (Calculation of Earnings Per Share and the Reconciliation of Earnings Per Share to Earnings Per Diluted Share) (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	[2]
Earnings per share:
Net income (loss) attributable to Bancorp	$ 305	$ 326	[1]
Dividends on preferred stock	15	15	[1]
Net income (loss) available to common shareholders	290	311	[1]
Less: Income allocated to participating securities	4	3
Earnings per share - basic	286	308
Earnings per diluted share:
Net income available to common shareholders	290	311	[1]
Stock-based awards	0	0
Net income available to common shareholders plus assumed conversions	290	311
Less: Income allocated to participating securities	4	3
Net income allocated to common shareholders	$ 286	$ 308
Earnings per share:
Net income allocated to common shareholders	747,667,521	773,564,178	[1]
Effect of dilutive securities:
Stock-based awards	13,000,000	4,000,000
Net income allocated to common shareholders	760,809,239	777,757,934	[1]
Earnings per share:
Earnings per share - basic	$ 0.38	$ 0.4	[1]
Earnings per diluted share:
Earnings per share - diluted	$ 0.38	$ 0.4	[1]

[1] A net tax deficiency of $ 1 million was reclassified from capital surplus to applicable income tax expense and average common shares outstanding – diluted were adjusted at March 31, 2016, related to the early adoption of ASU 2016-09 during the fourth quarter of 2016, with an effective date of January 1, 2016.

[2] A net tax deficiency of $1 million was reclassified from capital surplus to applicable income tax expense and average common shares outstanding – diluted were adjusted at March 31, 2016, related to the early adoption of ASU 2016-09 during the fourth quarter of 2016, with an effective date of January 1, 2016 .