Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Millions, except Per Share data	3 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Condensed Consolidated Statements of Operations [Abstract]
Revenues	$ 29,980	$ 27,450
Cost of Sales	28,471	26,058
Gross Profit	1,509	1,392
Operating Expenses	1,037	918
Operating Income	472	474
Other Income, Net	8	9
Interest Expense	(64)	(43)
Income Before Income Taxes	416	440
Income Tax Expense	(130)	(142)
Net Income	$ 286	$ 298
Earnings Per Common Share
Diluted	$ 1.13	$ 1.10
Basic	$ 1.15	$ 1.12
Dividends Declared Per Common Share	$ 0.20	$ 0.18
Weighted Average Common Shares
Diluted	254	272
Basic	249	266