XML 18 R48.htm IDEA: XBRL DOCUMENT

Fair Value Measurements 2 (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Mar. 31, 2012
Carrying Value [Member]
Liabilities:
Total debt	$ 1,298	$ 1,301
Facilities abandonment reserve	37	42
Estimated Fair Value [Member]
Liabilities:
Total debt	1,422	1,408
Facilities abandonment reserve	$ 43	$ 48

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

+ References+ Details