Change in Estimates (details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended										3 Months Ended	12 Months Ended					3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Inventory Type Five [Member]	Sep. 27, 2012 Inventory Type Five [Member]	Dec. 31, 2012 G650 [Member]	Sep. 27, 2012 G650 [Member]	Dec. 31, 2012 G280 [Member]	Dec. 31, 2011 G280 [Member]	Dec. 31, 2012 Airbus Three Hundred Fifty XWB [Member]	Dec. 31, 2011 Airbus Three Hundred Fifty XWB [Member]	Sep. 27, 2012 Inventory Type Eight [Member]	Dec. 31, 2012 Inventory Type Eight [Member]	Dec. 31, 2012 B747-8 [Member]	Sep. 27, 2012 B747-8 [Member]	Mar. 29, 2012 B747-8 [Member]	Dec. 31, 2011 B747-8 [Member]	Dec. 31, 2012 B767	Dec. 31, 2012 B767
Change In Estimate [Line Items]
Decrease In Net Earnings From Impact Of Changes In Profit Booking Rates And Other Matters	$ 412.0
Net Decrease In Operating Profit From Impact Of Changes In Profit Booking Rates And Other Matters	644.7
Decrease In Diluted Earnings Per Share From Impact Of Changes In Profit Booking Rates And Other Matters	$ 2.88
Net Forward Loss Charge Recorded	644.7										151.0	151.0					8.0	8.0
Provision for Loss on Contracts	$ 607.4	$ 227.9	$ 184.0	$ 184.0	$ 162.5	$ 162.5	$ 118.8	$ 177.6	$ 8.9	$ 3.0		$ 115.2	$ 6.4	$ 2.4	$ 2.7	$ 18.3