|
Share-Based Compensation Value Creation Plan (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
0 Months Ended | 6 Months Ended | 12 Months Ended | |
|---|---|---|---|---|
|
Dec. 31, 2012
|
Jun. 30, 2014
|
Jun. 30, 2013
|
Dec. 31, 2012
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| VCP Liability, Taxes | $ 11 | $ 11 | ||
| Payments Related to Tax Withholding for Share-based Compensation | 8 | 14 | ||
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Value Creation Plan [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| VCP Cash Paid | 0 | 31 | 200 | |
| VCP Liability, Current | 31 | 31 | ||
| VCP Shares Issued Gross | 717,230 | |||
| VCP Shares Issued Withheld for Taxes | (290,798) | |||
| Payments Related to Tax Withholding for Share-based Compensation | $ 0 | $ 11 | ||