v3.3.1.900
Share-Based Compensation Long Term Incentive Plan (Details) - PLC Long Term Incentive Plan - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 12 Months Ended
Apr. 23, 2015
Apr. 22, 2015
Apr. 03, 2014
Apr. 02, 2014
Apr. 25, 2013
Apr. 24, 2013
Jun. 14, 2012
Feb. 28, 2015
Feb. 28, 2014
Feb. 28, 2013
Feb. 15, 2012
Mar. 31, 2015
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                              
Maximum Shares Available for Grant under PLC LTIP 22,977,116                            
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                         1,683,000 1,278,000 1,526,000
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   37,674   64,459                
Grant Date Fair Value $ 2   $ 2   $ 2   $ 2                
RSU's, Issued in Period, Gross   24,482   38,179   64,713                  
Fair Value of RSU’s Vested in Period   $ 2   $ 3   $ 3                  
RSU's, Used to Pay Witholding Taxes   (2,673)   (4,656)   (7,691)                  
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               535,345 365,930 218,070          
Fair Value of RSU’s Vested in Period               $ 42 $ 23 $ 9          
RSU's, Used to Pay Witholding Taxes               (199,211) (131,913) (78,692)          
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 RSU’s Vested in Period                       $ 107      
RSU's, Used to Pay Witholding Taxes                       (545,192)