XML 129 R112.htm IDEA: XBRL DOCUMENT v3.8.0.1
Note 17 - Reconciliation of Beginning and Ending Balances of Assets Measured With Significant Unobservable Inputs (Details) - Major US Plans [Member] - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Reconciliation Of Assets Measured With Significant Unobservable Inputs [Line Items]    
Fair value of plan assets at beginning of period $ 3,653  
Fair value of plan assets at end of period 3,804 $ 3,653
Real Estate [Member]    
Reconciliation Of Assets Measured With Significant Unobservable Inputs [Line Items]    
Fair value of plan assets at beginning of period 116  
Fair value of plan assets at end of period 94 116
Private Equity Funds [Member]    
Reconciliation Of Assets Measured With Significant Unobservable Inputs [Line Items]    
Fair value of plan assets at beginning of period 659  
Fair value of plan assets at end of period 615 659
Fair Value, Inputs, Level 3 [Member]    
Reconciliation Of Assets Measured With Significant Unobservable Inputs [Line Items]    
Fair value of plan assets at beginning of period 46 58
Net Realized and Unrealized Gains and (Losses) Relating to Assets Still Held 8 1
Net TransferInto/(Out of)Level 3 (14) (13)
Fair value of plan assets at end of period 40 46
Fair Value, Inputs, Level 3 [Member] | Real Estate [Member]    
Reconciliation Of Assets Measured With Significant Unobservable Inputs [Line Items]    
Fair value of plan assets at beginning of period 32 34
Net Realized and Unrealized Gains and (Losses) Relating to Assets Still Held 5 7
Net TransferInto/(Out of)Level 3 (11) (9)
Fair value of plan assets at end of period 26 32
Fair Value, Inputs, Level 3 [Member] | Private Equity Funds [Member]    
Reconciliation Of Assets Measured With Significant Unobservable Inputs [Line Items]    
Fair value of plan assets at beginning of period 14 24
Net Realized and Unrealized Gains and (Losses) Relating to Assets Still Held 3 (6)
Net TransferInto/(Out of)Level 3 (3) (4)
Fair value of plan assets at end of period $ 14 $ 14