Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share (Details)

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Earnings Per Share (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Basic earnings per common share:        
Net income $ 155,016 $ 178,836 $ 468,778 $ 483,110
Preferred stock dividends, deemed dividend and accretion of discount (7,964) (7,967) (23,891) (23,904)
Net income applicable to common shareholders 147,052 170,869 444,887 459,206
Average common shares issued and outstanding 816,497,000 830,398,000 820,884,000 835,410,000
Basic earnings per common share $ 0.18 $ 0.21 $ 0.54 $ 0.55
Diluted earnings per common share        
Net income applicable to common shareholders 147,052 170,869 444,887 459,206
Effect of assumed preferred stock conversion 7,964 7,967 23,891 23,904
Net income applicable to diluted earnings per share $ 147,052 $ 170,869    
Average common shares issued and outstanding 816,497,000 830,398,000 820,884,000 835,410,000
Dilutive potential common shares:        
Stock options and restricted stock units 11,367,000 9,254,000 11,397,000 7,764,000
Shares held in deferred compensation plans 1,506,000 1,373,000 1,443,000 1,350,000
Other 253,000 0 203,000 0
Dilutive potential common shares: 13,126,000 10,627,000 13,043,000 9,114,000
Total diluted average common shares issued and outstanding 829,623,000 841,025,000 833,927,000 844,524,000
Diluted earnings (loss) per common share $ 0.18 $ 0.2 $ 0.53 $ 0.54
Earnings Loss Per Share (Textuals) [Abstract]        
Options outstanding to purchase common stock shares having antidilutive effect 2,600,000 5,600,000 2,700,000 9,700,000