Supplementary Information (Cash and Cash Equivalents) (Details) - USD ($) $ in Millions	Jun. 29, 2018	Mar. 30, 2018		Jun. 30, 2017	Mar. 31, 2017
Supplementary Information [Abstract]
Cash	$ 472	$ 1,016
Cash equivalents	1,529	758
Total cash and cash equivalents	$ 2,001	$ 1,774	[1]	$ 2,306	$ 4,247

[1] Derived from audited financial statements.