Asset Impairments and Product Alignment Charges (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			3 Months Ended		12 Months Ended		3 Months Ended					12 Months Ended							3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2013 Technology Solutions [Member]	Mar. 31, 2013 Technology Solutions [Member]	Mar. 31, 2014 Technology Solutions [Member]	Mar. 31, 2013 Technology Solutions [Member]	Dec. 31, 2013 Technology Solutions [Member] Cost of Sales [Member]	Mar. 31, 2013 Technology Solutions [Member] Cost of Sales [Member]	Dec. 31, 2013 Technology Solutions [Member] Operating Expense [Member]	Mar. 31, 2013 Technology Solutions [Member] Operating Expense [Member]	Dec. 31, 2013 Technology Solutions [Member] Product Alignment [Member]	Mar. 31, 2012 Technology Solutions [Member] Product Alignment [Member]	Mar. 31, 2012 Technology Solutions [Member] Product Alignment [Member] Non Cash Asset Impairment Charges [Member]	Mar. 31, 2012 Technology Solutions [Member] Product Alignment [Member] Employee Severance [Member]	Mar. 31, 2012 Technology Solutions [Member] Product Alignment [Member] Customer Allowances [Member]	Mar. 31, 2012 Technology Solutions [Member] Product Alignment [Member] Other Product Alignment Charges [Member]	Mar. 31, 2012 Technology Solutions [Member] Product Alignment [Member] Cost of Sales [Member]	Mar. 31, 2012 Technology Solutions [Member] Product Alignment [Member] Operating Expense [Member]	Dec. 31, 2013 Technology Solutions [Member] Integration-related Expenses [Member]	Dec. 31, 2013 Technology Solutions [Member] Severance Charges Due to Natural Reduction in Workforce [Member]	Dec. 31, 2013 Technology Solutions [Member] Severance Charges Due to Reorganization [Member]	Dec. 31, 2013 Technology Solutions [Member] Non Cash Asset Impairment Charges [Member]
Asset Impairments And Product Alignment Charges [Line Items]
Goodwill and Intangible Asset Impairment					$ 46	$ 57	$ 46
Pre-tax charges resulting from product alignment plan				57				34		23		35	51	24	10	7	10	31	20	15	7	35	15
Asset impairment charge - capitalized software held for sale	12	10	0						10
Goodwill, Impairment Loss		$ 36			$ 36		$ 36				$ 36