XML 111 R83.htm IDEA: XBRL DOCUMENT v3.3.1.900
Employee benefits - Level three rollforward (Details 6) - Defined pension benefits - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Change in Level 3 fair value measurement rollforward, plan assets    
Fair value of plan assets at January 1 $ 10,465 $ 10,930
Return on plan assets:    
Exchange rate differences (419) (1,047)
Fair value of plan assets at December 31 9,743 10,465
Level 3    
Change in Level 3 fair value measurement rollforward, plan assets    
Fair value of plan assets at January 1 1,071 1,211
Return on plan assets:    
Assets still held at December 31 46 56
Assets sold during the year 18 11
Purchases (sales) 191 (68)
Transfers (from) into Level 3   (27)
Exchange rate differences (3) (112)
Fair value of plan assets at December 31 1,323 1,071
Private equity    
Change in Level 3 fair value measurement rollforward, plan assets    
Fair value of plan assets at January 1 136  
Return on plan assets:    
Fair value of plan assets at December 31 123 136
Private equity | Level 3    
Change in Level 3 fair value measurement rollforward, plan assets    
Fair value of plan assets at January 1 136 155
Return on plan assets:    
Assets still held at December 31 (9) 21
Assets sold during the year 20 3
Purchases (sales) (24) (39)
Exchange rate differences   (4)
Fair value of plan assets at December 31 123 136
Hedge funds    
Change in Level 3 fair value measurement rollforward, plan assets    
Fair value of plan assets at January 1 93  
Return on plan assets:    
Fair value of plan assets at December 31 94 93
Hedge funds | Level 3    
Change in Level 3 fair value measurement rollforward, plan assets    
Fair value of plan assets at January 1 93 158
Return on plan assets:    
Assets still held at December 31 1 (3)
Assets sold during the year (1) 8
Purchases (sales)   (59)
Exchange rate differences 1 (11)
Fair value of plan assets at December 31 94 93
Real estate    
Change in Level 3 fair value measurement rollforward, plan assets    
Fair value of plan assets at January 1 936  
Return on plan assets:    
Fair value of plan assets at December 31 1,180 936
Real estate | Level 3    
Change in Level 3 fair value measurement rollforward, plan assets    
Fair value of plan assets at January 1 842 866
Return on plan assets:    
Assets still held at December 31 54 43
Assets sold during the year (1)  
Purchases (sales) 215 30
Exchange rate differences (4) (97)
Fair value of plan assets at December 31 1,106 842
Commodities    
Change in Level 3 fair value measurement rollforward, plan assets    
Fair value of plan assets at January 1 62  
Return on plan assets:    
Fair value of plan assets at December 31 $ 59 62
Commodities | Level 3    
Change in Level 3 fair value measurement rollforward, plan assets    
Fair value of plan assets at January 1   32
Return on plan assets:    
Assets still held at December 31   (5)
Transfers (from) into Level 3   $ (27)