Fair Value Of Financial Instruments Unobservable Inputs Reconciliation (Details) $ in Millions |
9 Months Ended |
|---|---|
|
Sep. 30, 2016
USD ($)
| |
| Fair Value, Measurements, Recurring | |
| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | |
| Fair value at beginning of period | $ 32 |
| Fair value at end of period | 31 |
| Contingent Consideration Liability | |
| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | |
| Additions | 0 |
| Payments | (2) |
| Interest accretion | 1 |
| Contingent Consideration Liability | Fair Value, Measurements, Recurring | |
| Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | |
| Fair value at beginning of period | 32 |
| Fair value at end of period | $ 31 |