New Accounting Pronouncements New Accounting Pronouncements (Details) - USD ($) $ in Millions	Mar. 31, 2017		Jan. 01, 2017
New Accounting Pronouncements [Abstract]
Effect of early adoption of income tax consequences of intra-entity transfer of assets other than inventory	$ 384	[1]	$ 384

[1] Represents a cumulative-effect adjustment to retained earnings upon our adoption of a new accounting standards update on the income tax consequences of intra-entity transfers of assets other than inventory which was effective January 1, 2017. See Note 9 for further information.