Retirement Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
United States pension benefit expense [Member]
Retirement benefit plans expense
Service cost	$ 29	$ 23	$ 58	$ 46
Interest cost	33	33	67	66
Expected return on plan assets	(45)	(41)	(90)	(82)
Amortization	29	19	58	38
Total benefit plans	46	34	93	68
Settlement loss	5	4	9	7
Total expense	51	38	102	75
Non-United States pension benefit expense [Member]
Retirement benefit plans expense
Service cost	12	12	24	25
Interest cost	19	20	38	40
Expected return on plan assets	(19)	(18)	(38)	(36)
Amortization	4	3	8	6
Total benefit plans	16	17	32	35
Settlement loss	0	3	2	3
Total expense	16	20	34	38
Other postretirement benefit expense [Member]
Retirement benefit plans expense
Service cost	4	4	8	8
Interest cost	10	10	19	20
Expected return on plan assets	(2)	0	(3)	0
Amortization	3	3	7	6
Total benefit plans	15	17	31	34
Settlement loss	0	0	0	0
Total expense	$ 15	$ 17	$ 31	$ 34