Pension Plans and Other Postretirement Benefits Net Periodic Non Pension Plan Expense - Level 4 (Details) - USD ($) $ in Millions |
2 Months Ended | 10 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|---|
Dec. 31, 2014 |
Oct. 24, 2014 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2013 |
|
| Defined Benefit Plan Disclosure [Line Items] | |||||
| Defined Benefit Plan, Amortization of Prior Service Cost (Credit) | $ 1 | $ 4 | $ 0 | ||
| United States Postretirement Benefit Plan of US Entity, Defined Benefit [Member] | |||||
| Defined Benefit Plan Disclosure [Line Items] | |||||
| Defined Benefit Plan, Service Cost | 2 | 0 | 1 | 2 | $ 2 |
| Defined Benefit Plan, Interest Cost | 4 | 1 | 2 | 4 | 3 |
| Defined Benefit Plan, Actuarial Gain (Loss) | (1) | (4) | |||
| Defined Benefit Plan, Amortization of Prior Service Cost (Credit) | $ 0 | $ 0 | (3) | $ 0 | |
| Foreign Postretirement Benefit Plan, Defined Benefit [Member] | |||||
| Defined Benefit Plan Disclosure [Line Items] | |||||
| Defined Benefit Plan, Service Cost | 0 | 0 | |||
| Defined Benefit Plan, Interest Cost | 0 | 0 | |||
| Defined Benefit Plan, Actuarial Gain (Loss) | $ 1 | $ 0 | |||