|
Royalties And Licenses (Narrative) (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | 90 Months Ended | |
|---|---|---|---|
|
Mar. 31, 2015
|
Mar. 31, 2014
|
Mar. 31, 2022
|
|
| Royalties And Licenses [Line Items] | |||
| Royalty Related Loss And Or Impairment Charges | $ 122 | $ 35 | |
| Expected accretion expense | 29 | ||
| Unrecorded unconditional purchase obligation | 2,165 | ||
| Developer/Licensor Commitments | |||
| Royalties And Licenses [Line Items] | |||
| Unrecorded unconditional purchase obligation | 1,584 | ||
| Unrecognized Royalty-Based Commitment Losses [Member] | |||
| Royalties And Licenses [Line Items] | |||
| Loss on Contract Termination | 18 | ||
| Royalty-Based Asset Losses [Member] | |||
| Royalties And Licenses [Line Items] | |||
| Loss on Contract Termination | $ 17 | ||