Fair Values (Details Textuals) - USD ($) $ in Millions |
12 Months Ended | |
|---|---|---|
Dec. 31, 2015 |
Jun. 30, 2016 |
|
| Fair Value Assets Measured On Recurring Basis Financial Statement Captions [Line Items] | ||
| Impairment of Goodwill Prepaid Services | $ 219 | |
| Impairment Charge - Technology and Other Assets writedown to Fair Value | 165 | |
| Goodwill And Intangible Asset Impairment | 384 | |
| Fair Value, Measurements, Nonrecurring [Member] | ||
| Fair Value Assets Measured On Recurring Basis Financial Statement Captions [Line Items] | ||
| Assets measured at fair value for impairment | $ 0 | $ 0 |