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Hedging Activities | 3 Months Ended
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Jun. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Hedging activities disclosure [Text Block] | Hedging Activities In the normal course of business, we are exposed to interest rate changes and foreign currency fluctuations. At times, we limit these risks through the use of derivatives such as interest rate swaps and forward foreign exchange contracts. In accordance with our policy, derivatives are only used for hedging purposes. We do not use derivatives for trading or speculative purposes. Foreign currency rate risk The majority of our operations are conducted in U.S. dollars; however, certain assets and liabilities, revenues and expense and purchasing activities are incurred in and exposed to other currencies. We have certain foreign currency rate risk programs that manage the impact of foreign currency fluctuation including the use of foreign currency forward-exchange contracts. These contracts are used to offset the potential earnings effects from mostly intercompany foreign currency loans. These programs reduce but do not entirely eliminate foreign currency rate risk. At June 30, 2015 and March 31, 2015, forward contracts to hedge the U.S. dollar against cash flows denominated in Canadian dollars with total notional values of $399 million were designated for hedge accounting. These contracts will mature between March 2016 and March 2020. Changes in the fair values of contracts designated for hedge accounting are recorded to accumulated other comprehensive income and reclassified into earnings in the same period in which the hedged transaction affects earnings; amounts recorded to earnings for these contracts were not material during the first quarters of 2016 and 2015. We also have a number of forward contracts to primarily hedge the Euro against cash flows denominated in British pounds and other European currencies. At June 30, 2015 and March 31, 2015, the total notional value of these contracts was $2,002 million and $1,755 million. These contracts will mature from July 2015 to June 2016 and none of these contracts were designated for hedge accounting. Changes in the fair values of contracts not designated for hedge accounting are recorded directly to earnings and accordingly, net losses from the changes in the fair value of these contracts of $45 million and $20 million were recorded within operating expenses during the first quarters of 2016 and 2015. However, the losses from these contracts are largely offset by changes in the value of the underlying intercompany foreign currency loans. Information regarding the fair value of derivatives on a gross basis is as follows:
| Balance Sheet Caption | June 30, 2015 |  | March 31, 2015
| Fair Value of Derivative | U.S. Dollar Notional |  | Fair Value of Derivative | U.S Dollar Notional
(In millions) | Asset | Liability |  | Asset | Liability
Derivatives designated for hedge accounting |  |  |  |  |  |  |  |
Foreign exchange contracts (current) | Prepaid expenses and other | $ | 13 |  | $ | — |  | $ | 76 |  |  | $ | 14 |  | $ | — |  | $ | 76 |
Foreign exchange contracts (non-current) | Other assets | 50 |  | — |  | 323 |  |  | 53 |  | — |  | 323 |
Total |  | $ | 63 |  | $ | — |  |  |  | $ | 67 |  | $ | — |  |
Derivatives not designated for hedge accounting |  |  |  |  |  |  |  |
Foreign exchange contracts (current) | Prepaid expenses and other | $ | 1 |  | $ | — |  | $ | 248 |  |  | $ | 7 |  | $ | — |  | $ | 493 |
Foreign exchange contracts (current) | Other accrued liabilities | — |  | 51 |  | 1,754 |  |  | — |  | 79 |  | 1,262 |
Total |  | $ | 1 |  | $ | 51 |  |  |  | $ | 7 |  | $ | 79 |  |
Refer to Financial Note 12, "Fair Value Measurements," for more information on these recurring fair value measurements.

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- Definition The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6441202&loc=d3e80720-113993 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=56946850&loc=d3e41620-113959 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624163-113959 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5579240-113959 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4D -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624177-113959 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80784-113994 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=56946850&loc=d3e41641-113959 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5579245-113959 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624258-113959 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4K -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5708775-113959 Reference 13: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4J -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5708773-113959 Reference 14: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5618551-113959 Reference 15: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5580258-113959 Reference 16: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4E -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624181-113959 Reference 17: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 25 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6886632&loc=d3e76258-113986 Reference 18: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=56946850&loc=d3e41638-113959 Reference 19: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(n)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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