Equity in Net Assets of Non-consolidated Affiliates (Details) (SAIC-GMAC [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2015
SAIC-GMAC [Member]
Noncontrolling Interest [Line Items]
Undistributed earnings	$ 28

Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the country of domicile.

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