Acquisitions - Pro-Forma Information (Details) - HPES - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2017	Dec. 30, 2016	Dec. 31, 2017	Dec. 30, 2016
Business Acquisition [Line Items]
Revenues	$ 4,374		$ 12,942
Net income	$ 422		$ 1,199
Business Acquisition, Pro Forma Information [Abstract]
Revenues		$ 6,585		$ 19,358
Net income (loss)		(166)		(570)
Loss attributable to the Company		$ (174)		$ (587)
Loss per common share:
Loss per common share, Basic (in dollars per share)		$ (0.61)		$ (2.07)
Loss per common share, Diluted (in dollars per share)		$ (0.61)		$ (2.07)