Cash Flows (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash paid for:
Interest	$ 103	$ 91
Taxes on income, net of refunds	31	43
Operating:
ROU assets obtained in exchange for lease, net	275	(22)
Prepaid assets acquired under long-term financing	2	30
Investing:
Capital expenditures in accounts payable and accrued expenses	11	13
Capital expenditures through capital lease obligations	88	253
Assets acquired under long-term financing	2	235
(Decrease) increase in deferred purchase price receivable	(52)	321
Contingent consideration	3	0
Financing:
Dividends declared but not yet paid	1	57
Income tax refunds	$ 18	13
Change in lease classification from operating to finance lease		$ 87