Segment and Geographic Data (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Oct. 01, 2011	Jul. 02, 2011	Apr. 02, 2011	Jan. 01, 2011	Oct. 02, 2010	Jul. 03, 2010	Apr. 03, 2010	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Revenues
Manufacturing revenues									$ 11,172	$ 10,307	$ 10,139
Finance revenues									103	218	361
Total revenues	3,254	2,814	2,728	2,479	3,127	2,479	2,709	2,210	11,275	10,525	10,500
Fixed Wing Aircraft [Member] | Manufacturing Group [Member]
Revenues
Manufacturing revenues									2,990	2,563	3,320
Rotor Aircraft [Member] | Manufacturing Group [Member]
Revenues
Manufacturing revenues									3,525	3,241	2,842
Unmanned Aircraft Systems, Armored Security Vehicles, Precision Weapons And Other [Member] | Manufacturing Group [Member]
Revenues
Manufacturing revenues									1,872	1,979	1,899
Fuel Systems and Functional Components [Member] | Manufacturing Group [Member]
Revenues
Manufacturing revenues									1,823	1,640	1,287
Powered Tools, Testing and Measurement Equipment [Member] | Manufacturing Group [Member]
Revenues
Manufacturing revenues									402	330	300
Golf and Turf Care Products [Member] | Manufacturing Group [Member]
Revenues
Manufacturing revenues									$ 560	$ 554	$ 491