Cash Flows (Details) - USD ($) $ in Millions	9 Months Ended
	Dec. 31, 2017	Dec. 30, 2016
Cash paid for:
Interest	$ 188	$ 70
Taxes on income, net of refunds	235	43
Non-cash activities, Investing:
Capital expenditures in accounts payable and accrued expenses	4	33
Capital expenditures through capital lease obligations	510	34
Assets acquired under long-term financing	284	75
Non-cash activities, Financing:
Dividends declared but not yet paid	52	20
Stock issued for the acquisition of HPES	$ 9,850	$ 0