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Share-Based Compensation Summary of Activity for LTIP RSU's (Details) (PLC Long Term Incentive Plan [Member], USD $)
In Millions, except Share data, unless otherwise specified |
3 Months Ended | 9 Months Ended | 0 Months Ended | 1 Months Ended | 0 Months Ended | 9 Months Ended | 11 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Sep. 30, 2014
|
Sep. 30, 2013
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Sep. 30, 2014
|
Sep. 30, 2013
|
Dec. 31, 2013
|
Apr. 03, 2014
Restricted Stock Units (RSUs) [Member]
|
Apr. 25, 2013
Restricted Stock Units (RSUs) [Member]
|
Apr. 24, 2013
Restricted Stock Units (RSUs) [Member]
|
Jun. 14, 2012
Restricted Stock Units (RSUs) [Member]
|
Jun. 13, 2012
Restricted Stock Units (RSUs) [Member]
|
Nov. 22, 2011
Restricted Stock Units (RSUs) [Member]
|
Feb. 28, 2014
Restricted Stock Units (RSUs) [Member]
|
Feb. 28, 2013
Restricted Stock Units (RSUs) [Member]
|
Feb. 15, 2012
Restricted Stock Units (RSUs) [Member]
|
Sep. 30, 2014
Restricted Stock Units (RSUs) [Member]
|
Sep. 30, 2013
Restricted Stock Units (RSUs) [Member]
|
Sep. 30, 2012
Restricted Stock Units (RSUs) [Member]
|
Nov. 22, 2011
Restricted Stock Units (RSUs) [Member]
|
Dec. 31, 2013
Restricted Stock Units (RSUs) [Member]
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||||||||||||||||
| Allocated Share-based Compensation Expense | $ 21 | $ 10 | $ 54 | $ 34 | |||||||||||||||
| Allocated Share-based Compensation Expense, Net of Tax | 16 | 8 | 41 | 26 | |||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Granted in Period, Fair Value | 2 | 2 | 2 | 53 | 60 | 59 | 1 | ||||||||||||
| RSU Awards, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition | 2 years 0 months | ||||||||||||||||||
| LTIP Shares, Nonvested, Number | 3,170,000 | 2,918,000 | |||||||||||||||||
| LTIP Nonvested, Weighted Average Grant Date Fair Value | $ 44.59 | $ 44.59 | $ 36.55 | ||||||||||||||||
| LTIP Shares Granted | 24,144 | 37,674 | 64,459 | 51,003 | 800,000 | 1,450,000 | 1,880,000 | 823,000 | |||||||||||
| LTIP Grants in Period, Weighted Average Grant Date Fair Value | $ 67.92 | ||||||||||||||||||
| LTIP RSU's, Vested in Period | (405,000) | ||||||||||||||||||
| LTIP Vested in Period, Weighted Average Grant Date Fair Value | $ 35.52 | ||||||||||||||||||
| LTIP Shares, Forfeited in Period | (166,000) | ||||||||||||||||||
| LTIP Shares, Forfeitures, Weighted Average Grant Date Fair Value | $ 40.88 | ||||||||||||||||||
| Stock Issued During Period, Shares, Restricted Stock Award, Gross | 38,179 | 64,713 | 51,003 | 365,930 | 218,070 | ||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value | $ 3 | $ 3 | $ 1 | $ 23 | $ 9 | ||||||||||||||
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Withheld for Taxes in Period | 4,656 | 7,691 | 1,020 | 131,913 | 78,692 | ||||||||||||||