Accounting Standard Cash Flow Reclassification (Tables)

12 Months Ended

Mar. 31, 2018

Accounting Standard Cash Flow Reclassification [Abstract]

Accounting Standard Cash Flow Reclassification [Table Text Block]

	Year Ended March 31,
(In millions):	2018		2017		2016
Excess tax benefits from stock-based compensation	$	43	$	65	$	86
Cash paid to taxing authorities for shares withheld from employees	120		130		156
Increase to net cash provided by operating activities and net cash used in financing activities	$	163	$	195	$	242