Fair Value Measurements 2 (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
Carrying Value [Member]
Liabilities:
Total debt	$ 1,766	[1]	$ 1,290	[1]
Facility exit reserve	30	[2]	23	[2]
Estimated Fair Value [Member]
Liabilities:
Total debt	1,884	[1]	1,413	[1]
Facility exit reserve	$ 33	[2]	$ 27	[2]

[1] Estimated fair value of total debt is based on quoted prices for similar liabilities for which significant inputs are observable except for certain long-term lease obligations, for which fair value approximates carrying value (Level 2).

[2] Estimated fair value for the facility exit reserve is determined using the Company’s incremental borrowing rate at March 31, 2014 and 2013. At March 31, 2014 and 2013, the facility exit reserve included approximately $12 million and $6 million, respectively, in “Accrued expenses and other current liabilities” and approximately $18 million and $17 million, respectively, in “Other noncurrent liabilities” in the Company’s Consolidated Balance Sheets (Level 3).