XML 39 R52.htm IDEA: XBRL DOCUMENT v3.3.0.814
Summary of Significant Accounting Policies Employee Retirement Benefits (Details) - Pension Plan [Member] - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2015
Defined Benefit Plan Disclosure [Line Items]    
Settlement of defined pension benefit obligation, cash contribution $ 102  
Actuarial losses of defined pension benefit plan recorded in Administrative expenses $ 305 $ 305