Fair Value Measurements 2 (Details) - USD ($) $ in Millions		Jun. 30, 2016	Mar. 31, 2016
Carrying Value
Liabilities:
Total debt		$ 1,950	$ 1,953
Carrying Value | Facility Exit
Liabilities:
Facility exit reserve	[1]	15	16
Estimated Fair Value
Liabilities:
Total debt	[2]	2,069	2,058
Estimated Fair Value | Facility Exit
Liabilities:
Facility exit reserve	[1]	$ 17	$ 17

[1] Estimated fair value for the facility exit reserve is determined using the Company’s incremental borrowing rate at June 30, 2016 and March 31, 2016. At June 30, 2016 and March 31, 2016, the facility exit reserve included approximately $4 million and $4 million, respectively, in “Accrued expenses and other current liabilities” and approximately $11 million and $12 million, respectively, in “Other noncurrent liabilities” in the Company’s Condensed Consolidated Balance Sheets (Level 3).

[2] 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).