Commitments And Contingencies (Narrative) (Details)
$ in Millions |
Sep. 30, 2016
USD ($)
|
| Loss Contingencies [Line Items] |
|
| Unrecorded Unconditional Purchase Obligation |
$ 2,535
|
| Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals |
1
|
| Amount of potential cash payments that could result from unrecognized tax benefits |
86
|
| Unrecorded Unconditional Purchase Obligation Payable in Common Stock Per Year | Maximum |
|
| Loss Contingencies [Line Items] |
|
| Unrecorded Unconditional Purchase Obligation |
10
|
| Unrecorded Unconditional Purchase Obligation Payable in Common Stock | Maximum |
|
| Loss Contingencies [Line Items] |
|
| Unrecorded Unconditional Purchase Obligation |
$ 32
|