Supplemental Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2011

Supplemental Quarterly Financial Data [Abstract]

Supplemental Quarterly Financial Data

	First		Second		Third		Fourth		Total
	(In millions, except per share amounts)
2011
Revenues and other	$	3,925	$	4,338	$	4,328	$	4,297	$	16,888
Expenses		2,791		3,079		3,326		3,108		12,304
Net income	$	1,134	$	1,259	$	1,002	$	1,189	$	4,584
Income attributable to common stock	$	1,115	$	1,240	$	983	$	1,170	$	4,508
Net income per common share(1):
Basic	$	2.91	$	3.23	$	2.56	$	3.05	$	11.75
Diluted	$	2.86	$	3.17	$	2.50	$	2.98	$	11.47
2010
Revenues and other	$	2,673	$	2,972	$	3,013	$	3,434	$	12,092
Expenses		1,968		2,112		2,235		2,745		9,060
Net income	$	705	$	860	$	778	$	689	$	3,032
Income attributable to common stock	$	705	$	860	$	765	$	670	$	3,000
Net income per common share(1):
Basic	$	2.09	$	2.55	$	2.14	$	1.79	$	8.53
Diluted	$	2.08	$	2.53	$	2.12	$	1.77	$	8.46

(1) The sum of the individual quarterly net income per common share amounts may not agree with year-to-date net income per common share as each quarterly computation is based on the weighted-average number of common shares outstanding during that period.