Supplemental Information (Tables)

12 Months Ended

Mar. 31, 2017

Supplemental Cash Flow Elements [Abstract]

Supplemental cash flow information

Supplemental cash flow information is as follows (in millions).

	Year Ended March 31,
	2017		2016		2015
Supplemental disclosures of cash flow information:
Interest paid	$	288	$	308	$	303
Income taxes paid	$	128	$	123	$	131