Information By Segment and Geographic Region (Corporate Related Expenses And Assets) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Business Segments Information Abstract
Assets	$ 11,851		$ 12,679		$ 13,929
Capital Expenditures	191		187		186
Depreciation Expense	202		179		165
Government
Business Segments Information Abstract
Assets	4,013		3,095		2,892
Capital Expenditures	132		132		159
Depreciation Expense	154		143		128
Enterprise
Business Segments Information Abstract
Assets	2,820		2,552		2,264
Capital Expenditures	59		55		27
Depreciation Expense	48		36		37
Aggregate Segment
Business Segments Information Abstract
Assets	6,833		5,647		5,156
Capital Expenditures	191		187		186
Depreciation Expense	202		179		165
Other
Business Segments Information Abstract
Assets	$ 5,018	[1]	$ 7,032	[1]	$ 8,773	[1]

[1] Assets in Other include primarily cash and cash equivalents, Sigma Fund, deferred income taxes, short-term investments, property, plant and equipment, investments, and the administrative headquarters of the Company.