XML 133 R118.htm IDEA: XBRL DOCUMENT v3.6.0.2
Benefit Plans Benefit Plans (Narrative) (details) - USD ($)
$ in Millions
6 Months Ended 12 Months Ended
Dec. 31, 2015
Jun. 30, 2015
Dec. 31, 2014
Jun. 30, 2014
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Defined Benefit Plan, Curtailments           $ 55  
Lump sum settlement acceptance rate by retirement plan participants     20.00%       20.00%
Lump sum pension settlement payment             $ 253
Settlement loss             84
Curtailment gain             86
Future capital call commitments for limited partnership investments         $ 380    
Percentage of limited partnerships employing hedge fund strategies focused on fixed income and equity investments 70.00%       68.00% 70.00%  
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent         50.00%    
Defined Contribution Plan, Employer Matching Contribution, Percent of Match         70.00%    
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay         6.00%    
Defined Contribution Plan, Employers Matching Contribution, Vesting Period in Years         5 years    
Company Contribution of Eligible Compensation, Depending on Age, Percent         3% or 5%    
Benefit expense for the Company's savings plan         $ 75 $ 71 $ 69
Additional Contribution, Management Discretion [Member]              
Defined Contribution Plan, Employer Matching Contribution, Percent of Match         80.00%    
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay         6.00%    
Defined Contribution Plan, Employers Matching Contribution, Vesting Period in Years         5 years    
Defined Contribution Plan, Employer Discretionary Contribution Amount, Percent         2.00%    
First Year of Employment [Member]              
Defined Contribution Plan, Employer Matching Contribution, Percent of Match         35.00%    
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay         6.00%    
Pension Plans, Defined Benefit [Member]              
Settlement through group annuity purchase         $ 88 0  
Decrease in Benefit Obligation due to settlement         $ 86 0  
Discount rate 4.00% 3.85%     4.15%   4.65%
Settlement loss         $ 0 0 $ 84
Defined benefit plan, accumulated benefit obligation $ 2,821       2,729 $ 2,821  
Future capital call commitments for limited partnership investments         $ 113    
Percentage of limited partnerships employing hedge fund strategies focused on fixed income and equity investments 87.00%       86.00% 87.00%  
Limited partnership equity related hedge fund strategy plan assets         57.00%    
Limited partnership hedge fund multi strategy plan assets         38.00%    
Limited partnership hedge fund strategy distressed investments plan assets         5.00%    
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year         $ 12    
Cost of Living Adjustment [Member]              
Assumptions used in calculating assumed health care cost trend rate         4.00%    
Employer Subsidy on Health Care Costs [Member]              
Assumptions used in calculating assumed health care cost trend rate         4.00%    
Other Postretirement Benefit Plan [Member]              
Settlement through group annuity purchase         $ 0 $ 0  
Decrease in Benefit Obligation due to settlement         $ 0 $ 0  
Discount rate     3.10% 3.60% 2.75% 2.50%  
Curtailment gain         $ 0 $ 0 $ 86
Defined benefit plan, health care cost trend rate assumed for next fiscal year         4.00% 4.00% 4.00%
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year         $ 3    
Equity securities [Member]              
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum         40.00%    
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum         60.00%