Description Of Business And Basis Of Presentation New Lease Standard Balance Sheet at Period Start (Details) - USD ($) $ in Millions	Jun. 30, 2019	Apr. 01, 2019	Mar. 31, 2019	[1]
Item Effected [Line Items]
Other current assets	$ 284	$ 307	$ 313
Other assets	323	329	114
Accrued Liabilities, Current	915	1,099	1,052
Other liabilities	$ 272	294	$ 132
Balance Sheet Impact at Period End [Member]
Item Effected [Line Items]
Other current assets		(6)
Other assets		215
Accrued Liabilities, Current		47
Other liabilities		$ 162

[1] Derived from audited Consolidated Financial Statements.