v3.2.0.727
Share-Based Compensation Long Term Incentive Plan (Details) - PLC Long Term Incentive Plan - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 6 Months Ended
Apr. 23, 2015
Apr. 22, 2015
Apr. 03, 2014
Feb. 28, 2015
Feb. 28, 2014
Feb. 28, 2013
Feb. 15, 2012
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Maximum Shares Available for Grant under PLC LTIP 22,977,116                    
Share-based Compensation Expense               $ 21 $ 19 $ 35 $ 33
Share-based Compensation Expense, Net of Tax               $ 16 $ 15 $ 27 $ 25
Minimum                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Performance-Based Awards Payout % Range             0.00%        
Maximum                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Performance-Based Awards Payout % Range             200.00%        
Restricted Stock Units (RSUs)                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
RSU's Granted                   946,000  
Grant Date Fair Value       $ 76 $ 53 $ 60          
Time-Based Awards % Granted For Officers             25.00%        
Time-Based Awards % Granted For Executives             50.00%        
Performance-Based Awards % Granted For Officers             75.00%        
Performance-Based Awards % Granted For Executives             50.00%        
Board of Directors | Restricted Stock Units (RSUs)                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
RSU's Granted 20,347   24,144                
Grant Date Fair Value $ 2   $ 2                
RSU's Issued in Period, Gross   24,482                  
Fair Value of RSUs Vested in Period   $ 2                  
RSU's, Used to Pay Witholding Taxes   2,673                  
Executives | 2012 Grant | Restricted Stock Units (RSUs)                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
RSU's Granted             1,880,000        
Executives | 2013 Grant | Restricted Stock Units (RSUs)                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
RSU's Granted           1,450,000          
Executives | 2014 Grant | Restricted Stock Units (RSUs)                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
RSU's Granted         780,000            
Executives | 2015 Grant | Restricted Stock Units (RSUs)                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
RSU's Granted       900,000              
Time-Based | Executives | Restricted Stock Units (RSUs)                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
RSU's Issued in Period, Gross       535,345 365,930            
Fair Value of RSUs Vested in Period       $ 42 $ 23            
RSU's, Used to Pay Witholding Taxes       199,211 131,913            
Performance-Based | Executives | 2012 Grant | Restricted Stock Units (RSUs)                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
RSU's Issued in Period, Gross                   1,364,966  
Fair Value of RSUs Vested in Period                   $ 107  
RSU's, Used to Pay Witholding Taxes                   545,192