Stockholders' Equity (Narrative) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended				6 Months Ended					1 Months Ended		2 Months Ended	1 Months Ended
	Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013		Sep. 30, 2012		Sep. 30, 2013 Distribution Solutions [Member] Nadro [Member]	Apr. 30, 2013 ASR March 2013 [Member]	Mar. 31, 2013 ASR March 2013 [Member]	Apr. 30, 2013 ASR March 2013 [Member]	Jul. 31, 2013 Old Rate Per Share [Member]	Jul. 31, 2013 New Rate Per Share [Member]
Stockholders' Equity [Line Items]
Dividends rate per share													$ 0.20	$ 0.24
Payments for repurchase of common stock	$ 0				$ 128		$ 53				$ 150
Shares received under repurchase programs	0									0.2	1.2	1.4
Average price paid per share												$ 107.63
Stock Repurchase Program, Remaining Authorized Repurchase Amount					340
Equity Method Investment, Ownership Percentage									49.00%
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax	$ (44)	[1]	$ 0	[1]	$ (44)	[1]	$ 0	[1]

[1] As a result of our sale of our 49% equity interest in Nadro, foreign currency translation net losses of $44 million were reclassified from AOCI to other income, within our condensed consolidated statement of operations. Such losses were previously considered in our impairment evaluation of the investment when we committed to a plan to sell the investment during the fourth quarter of 2013, and accordingly did not impact earnings for the second quarter and first six months of 2014.