Stock-based Compensation wtd avg periods (Details) - USD ($)
$ / shares in Units, $ in Millions |
12 Months Ended |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value |
|
|
$ 0
|
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |
|
|
|
| Allocated Share-based Compensation Expense |
$ 3
|
$ 3
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number |
|
10,919,802
|
10,933,986
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period |
|
|
(14,184)
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number |
|
|
10,919,802
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price |
|
|
$ 2.69
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price |
|
|
4.85
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price |
|
|
$ 2.68
|
| Tranche C RDUs [Member] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Beginning Balance |
|
0
|
1,174,860
|
| Stock Issued During Period, Shares, Restricted Stock Award, Forfeited |
|
|
(2,955)
|
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number Ending Balance |
|
|
0
|
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value |
|
|
$ 1.92
|
| Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value |
|
|
$ 4.85
|
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period |
|
|
(1,171,905)
|
| Weighted Average Fair Value of Cancelled Restricted Units |
|
|
$ 1.91
|