v2.4.0.8
Retirement Benefit Plans (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
United States pension benefit expense [Member]
        
Retirement benefit plans expense        
Service cost $ 32 $ 29 $ 64 $ 58
Interest cost 37 33 74 67
Expected return on plan assets (56) (45) (113) (90)
Amortization 33 29 66 58
Total 46 46 91 93
Settlement loss 10 5 16 9
Total expense 56 51 107 102
Non-United States pension benefit expense [Member]
        
Retirement benefit plans expense        
Service cost 15 12 30 24
Interest cost 19 19 39 38
Expected return on plan assets (21) (19) (42) (38)
Amortization 7 4 14 8
Total 20 16 41 32
Settlement loss 0 0 0 2
Total expense 20 16 41 34
Other postretirement benefit expense [Member]
        
Retirement benefit plans expense        
Service cost 5 4 10 8
Interest cost 8 10 17 19
Expected return on plan assets (1) (2) (3) (3)
Amortization 4 3 7 7
Total 16 15 31 31
Settlement loss 0 0 0 0
Total expense $ 16 $ 15 $ 31 $ 31